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Institut für Leistungselektronik und Elektrische Antriebe
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Veröffentlichungen am Institut für Leistungselektronik und Elektrische Antriebe

2020
1. Munoz Baron, K., Sharma, K., Nitzsche, M., Ziegler, P., Koch, D., Kallfass, I.: Characterization of Threshold Voltage for Application-Oriented Power Cycling Conditions for Wide-Bandgap Power Devices. In: PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–7 (2020).
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  @inproceedings{9178169, abstract = {A quasi-threshold voltage measurement setup is implemented in a test bench to allow online parameter observation during power cycling tests for silicon carbide MOSFETs. The threshold voltage is known to change during operation, either temporarily or non-reversibly, due to degradation and trapping phenomena in the MOS-structure. To evaluate different assembly and interconnection technologies, for conditions as close to the real application as possible, an application-oriented power cycling test setup is examined. The proposed test bench allows the measurement of a quasi-threshold voltage under the influence of different off-state drain-source and gate voltages. Measurements show a decrease of quasi-threshold voltage with increasing off-state drain-source voltage and negative gate-source voltage.}, author = {{Munoz Baron}, K. and {Sharma}, K. and {Nitzsche}, M. and {Ziegler}, P. and {Koch}, D. and {Kallfass}, I.}, booktitle = {PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = {July}, pages = {1-7}, title = {Characterization of Threshold Voltage for Application-Oriented Power Cycling Conditions for Wide-Bandgap Power Devices}, url = {https://ieeexplore.ieee.org/document/9178169}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9178169
2. Fischer, M., Ruthardt, J., Ketchedjian, V., Ziegler, P., Nitzsche, M., Roth-Stielow, J.: Four-Level Inverter with Variable Voltage Levels for Hardware-in-the-Loop Emulation of Three-Phase Machines. In: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). p. P.1-P.8 (2020).
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  @inproceedings{9215767, abstract = {In order to emulate the behavior of three-phase machines in a hardware-in-the-loop test bench, an applicable power electronic device is required. For this purpose, an inverter concept with four variable voltage levels per phase is presented. This concept precisely fulfills the requirements of three-phase machine emulation. The presented inverter is theoretically able to adjust the ideal countervoltage course which is needed to emulate three-phase machines' electrical behavior. In contrast, the countervoltages of commonly used power electronic devices suffer from deviation caused by switched-mode operation or limited bandwidth. Within this paper the setup of the four-level inverter is presented. Besides, the paper discusses a control strategy for operating the four-level inverter as a three-phase machine emulator.}, author = {{Fischer}, M. and {Ruthardt}, J. and {Ketchedjian}, V. and {Ziegler}, P. and {Nitzsche}, M. and {Roth-Stielow}, J.}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, month = {Sep.}, pages = {P.1-P.8}, title = {Four-Level Inverter with Variable Voltage Levels for Hardware-in-the-Loop Emulation of Three-Phase Machines}, url = {https://ieeexplore.ieee.org/document/9215767}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9215767
3. Fischer, M., Erthle, D., Ziegler, P., Ruthardt, J., Roth-Stielow, J.: Comparison of Two Power Electronic Topologies for Power Hardware in the Loop Machine Emulator. In: 2020 IEEE Applied Power Electronics Conference and Exposition (APEC). pp. 2950–2954. , New Orleans, USA, (2020).
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  @inproceedings{9124094, abstract = {Emulating electrical machines simplifies development and testing inverters and their control systems in different operating conditions. Therefore, two fundamental components are required: a real-time operating machine model and an applicable power electronic device, which adjusts the same currents and voltages as the surveyed machine would. Within this paper, two different power electronic topologies are compared regarding their suitability for hardware in the loop machine emulation. The surveyed topologies are a multibranch interleaved-switched inverter on the one hand and an inverter with output filter on the other hand. Especially their dynamic behavior in emulating the machine currents’ course as precise as possible is investigated. Moreover, additional disturbances caused by the power electronics’ switched-mode operation are analyzed, too. For this purpose, both power electronic devices are set up in hardware, controlled by an exemplary machine model. This paper presents the setup of the two topologies and the dedicated control system as well as the analysis by simulation and measurement.}, address = {New Orleans, USA,}, author = {Fischer, Manuel and Erthle, Dennis and Ziegler, Philipp and Ruthardt, Johannes and Roth-Stielow, Jörg}, booktitle = {2020 IEEE Applied Power Electronics Conference and Exposition (APEC)}, eventdate = {15-19. March 2020}, issn = {2470-6647}, month = {March}, pages = {2950-2954}, title = {Comparison of Two Power Electronic Topologies for Power Hardware in the Loop Machine Emulator}, url = {https://ieeexplore.ieee.org/document/9124094/}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9124094/
4. Weimer, J., Koch, D., Nitzsche, M., Zehelein, M., Kallfass, I.: Efficiency Requirements for Passively Cooled Converters with Thermal Measurement Based 3D-FEM Simulation. In: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). pp. 1–8 (2020).
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  @inproceedings{9215643, abstract = {Passively cooled housings for modern power electronic converters with high power density require maximum heat dissipation over little surface area. To determine the power dissipation budget, this paper presents thermal measurement based convection modeling with temperature dependent heat transfer coefficients and the derivation of efficiency requirements for given housing dimensions.}, author = {{Weimer}, J. and {Koch}, D. and {Nitzsche}, M. and {Zehelein}, M. and {Kallfass}, I.}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, month = {Sep.}, pages = {1-8}, title = {Efficiency Requirements for Passively Cooled Converters with Thermal Measurement Based 3D-FEM Simulation}, url = {https://ieeexplore.ieee.org/document/9215643}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9215643
5. Ziegler, P., Tröster, N., Schmidt, D., Ruthardt, J., Fischer, M., Roth-Stielow, J.: Wide Bandwidth Current Sensor for Commutation Current Measurement in Fast Switching Power Electronics. In: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). p. P.1-P.9 (2020).
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  @inproceedings{9215686, abstract = {This paper presents a current sensor for commutation current measurement with a bandwidth from DC up to 315 MHz. The sensor is inserted in the commutation loop by a coaxial housing with a low insertion inductance of about 1.2 nH. The sensor is based on the HOKA principle using tunnel magnetoresistance sensors and a Rogowski-coil for low and high frequency current measurement respectively. The current sensor is tested in a half-bridge configuration equipped with gallium nitride transistors and compared to two state-of-the-art current sensors.}, author = {{Ziegler}, P. and {Tröster}, N. and {Schmidt}, D. and {Ruthardt}, J. and {Fischer}, M. and {Roth-Stielow}, J.}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, month = {Sep.}, pages = {P.1-P.9}, title = {Wide Bandwidth Current Sensor for Commutation Current Measurement in Fast Switching Power Electronics}, url = {https://ieeexplore.ieee.org/document/9215686}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9215686
6. Nitzsche, M., Lu, S., Zehelein, M., Ruthardt, J., Roth-Stielow, J.: Comprehensive Comparison of 99% Efficient Totem-Pole PFC with Fixed (PWM) or Variable (TCM) Switching Frequency. In: PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–8 (2020).
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  @inproceedings{9178001, abstract = {This paper presents a comprehensive comparison of a GaN-transistor based power factor correction in a totem-pole configuration – modulated on the one hand with pulse width modulation and on the other hand with triangular current mode. There are several different modulation schemes for the input current among which pulse width modulation and triangular current mode prove to be two of the most promising options in regard to overall efficiency. The basis for this comparison is a 180W front end with an AC input voltage of 230 V, 50 Hz and a DC output voltage which is varied between 360 V and 400 V. The experimental results demonstrate an efficiency at nominal power of 99% and greater. Focus of this paper is the comparison of the overall system efficiency when switching frequency, output voltage and size of the PFC inductor is varied with both modulation schemes. Power factor and total harmonic distortion of the current will be taken into account in order to ensure compatibility with applicable standards.}, author = {{Nitzsche}, M. and {Lu}, S. and {Zehelein}, M. and {Ruthardt}, J. and {Roth-Stielow}, J.}, booktitle = {PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = {July}, pages = {1-8}, title = {Comprehensive Comparison of 99% Efficient Totem-Pole PFC with Fixed (PWM) or Variable (TCM) Switching Frequency}, url = {https://ieeexplore.ieee.org/document/9178001}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9178001
7. Ruthardt, J., Schnabel, L., Ziegler, P., Marx, P., Sharma, K., Fischer, M., Nitzsche, M., Roth-Stielow, J.: Closed Loop Junction Temperature Control of Power Transistors for Lifetime Extension. In: 2020 IEEE Applied Power Electronics Conference and Exposition (APEC). pp. 2955–2955. , New Orleans, USA, (2020).
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  @inproceedings{9124000, abstract = {The lifetime of power transistors significantly depends on the junction temperature swings. These temperature swings occur, for instance when the load conditions of the power electronic circuit change. In this work, a closed loop junction temperature control system is designed to increase the expected lifetime of power transistors. Therefore, the control system reduces the occurring temperature swings by influencing the power losses of the power transistor. For that, the gate driver’s supply voltage is adjusted, which affects the switching speed and the conduction characteristics. The junction temperature is measured by determination of the temperature sensitive internal gate resistance via the high-frequency gate-signalinjection method and fed back to the junction temperature controller. Both, the junction temperature measurement method and the control system are evaluated with a three-phase two-level voltage-source inverter. It is extended by a control strategy, which calculates a suitable set value for the controller in order to reduce junction temperature swings.}, address = {New Orleans, USA,}, author = {Ruthardt, Johannes and Schnabel, Lukas and Ziegler, Philipp and Marx, Philipp and Sharma, Kanuj and Fischer, Manuel and Nitzsche, Maximilian and Roth-Stielow, Jörg}, booktitle = {2020 IEEE Applied Power Electronics Conference and Exposition (APEC)}, eventdate = {15-19. March 2020}, issn = {2470-6647}, month = {March}, pages = {2955-2955}, title = {Closed Loop Junction Temperature Control of Power Transistors for Lifetime Extension}, url = {https://ieeexplore.ieee.org/document/9124000/}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9124000/
8. Sharma, K., Dayanand, D., Barón, K.M., Ruthardt, J., Münzenmayer, F., Hückelheim, J., Kallfass, I.: A Robust Approach for Characterization of Junction Temperature of SiC Power Devices via Quasi-Threshold Voltage as Temperature Sensitive Electrical Parameter. In: 2020 IEEE Applied Power Electronics Conference and Exposition (APEC). pp. 1532–1536. , New Orleans, USA (2020).
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  @inproceedings{9124609, abstract = {This paper presents a robust and easy-to-implement approach to measure junction temperature of SiC power devices using quasi-threshold voltage as temperature sensitive electrical parameter with adjustable temperature sensitivity. Static and dynamic measurements were performed and compared on a commercially available 1.2 kV/120 A SiC power module. The voltage drop across the parasitic inductor is used as the trigger for the data acquisition circuit. A robust approach by using a D-flip-flop for latching in data acquisition circuit while keeping fast turn-on behavior and low noise susceptibility in consideration with the option of variable sensitivity has been successfully implemented and presented.}, address = {New Orleans, USA}, author = {Sharma, Kanuj and Dayanand, Deepak and Barón, Kevin Muñoz and Ruthardt, Johannes and Münzenmayer, Florian and Hückelheim, Jan and Kallfass, Ingmar}, booktitle = {2020 IEEE Applied Power Electronics Conference and Exposition (APEC)}, eventdate = {15-19. March 2020}, issn = {2470-6647}, language = {English}, month = {March}, pages = {1532-1536}, title = {A Robust Approach for Characterization of Junction Temperature of SiC Power Devices via Quasi-Threshold Voltage as Temperature Sensitive Electrical Parameter}, url = {https://ieeexplore.ieee.org/document/9124609/}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9124609/
9. Ziegler, P., Haarer, J., Ruthardt, J., Nitzsche, M., Roth-Stielow, J.: Air-Core Toroidal Transformer Concept for High-Frequency Power Converters. In: PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–5 (2020).
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  @inproceedings{9178236, abstract = {This paper presents an air-core toroidal transformer concept, which offers the ability to integrate the power electronic circuit of a converter into the transformer structure. Air-core magnetic components in high-frequency power converters give the advantage of no core losses. The transformer is designed with the help of a magnetic circuit model verified with a finite-element method simulation. The analytic and measured results of a prototype are compared.}, author = {{Ziegler}, P. and {Haarer}, J. and {Ruthardt}, J. and {Nitzsche}, M. and {Roth-Stielow}, J.}, booktitle = {PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = {July}, pages = {1-5}, title = {Air-Core Toroidal Transformer Concept for High-Frequency Power Converters}, url = {https://ieeexplore.ieee.org/document/9178236}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9178236
10. Wagner, F., Reber, G., Rittner, M., Guyenot, M., Nitzsche, M., Wunderle, B.: Power Cycling of SiC-MOSFET Single-Chip Modules with Additional Measurement Cycles for Life End Determination. In: VDE (ed.) CIPS 2020; 11th International Conference on Integrated Power Electronics Systems. pp. 530–535. , Berlin, Germany (2020).
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  @inproceedings{9097737, abstract = {To meet the trend of the increasing market of SiC-based power electronics, ECPE is under refinement of the AQG324, to adapt reliability and lifetime testing of power modules with Power Cycling Testing (PCT) also for SiC-based power modules. Based on this qualification guideline the end of life (EoL) criteria of the forward voltage drop VDS is discussed with power cycling (PC) results of SiC-MOSFET single-chip modules and it is shown that different lifetime results can be obtained, if VDS is measured accordingly to different measurement and thermal conditions of VDS. Therefore, PC with a main cycle and additional measurement cycles is introduced to measure VDS and the thermal resistance Rth independently from PC and with simple measurement equipment. Using this procedure, three SiC-MOSFET single chip vehicles with different top-side contacts in fact Al-wire, Al-ribbon and AlCu ribbon bonds are compared using a ‘scientific PC’ and measurement cycles to retain EoL criteria.}, address = {Berlin, Germany}, author = {Wagner, Felix and Reber, Gerhard and Rittner, Martin and Guyenot, Michael and Nitzsche, Maximilian and Wunderle, Bernhard}, booktitle = {CIPS 2020; 11th International Conference on Integrated Power Electronics Systems}, editor = {VDE}, eventdate = {24.-26. March 2020}, month = {March}, pages = {530-535}, title = {Power Cycling of SiC-MOSFET Single-Chip Modules with Additional Measurement Cycles for Life End Determination}, url = {https://ieeexplore.ieee.org/document/9097737}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9097737
11. Ruthardt, J., Sharma, K., Schmid, T., Nitzsche, M., Ziegler, P., Roth-Stielow, J.: Online Junction Temperature Measurement of Power Semiconductor Devices. In: PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–5 (2020).
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  @inproceedings{9178170, abstract = {Monitoring the junction temperature of power electronic devices enables over-temperature protection, health monitoring, online lifetime estimation or junction temperature control to extend the expected lifetime. A method for online junction temperature estimation in power semiconductor devices based on the temperature sensitive reverse-recovery behavior of pin-diodes is presented in this paper. Since the reverse-recovery time of diodes is a function of their junction temperature, it can be used for junction temperature measurement. Therefore, a simple measurement circuit is developed to determine the duration between the start of the load current commutation and the instant of time when the diode is in blocking mode. This duration, which is related to the reverse-recovery-time, is defined as the quasi-reverse-recovery time.}, author = {{Ruthardt}, J. and {Sharma}, K. and {Schmid}, T. and {Nitzsche}, M. and {Ziegler}, P. and {Roth-Stielow}, J.}, booktitle = {PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = {July}, pages = {1-5}, title = {Online Junction Temperature Measurement of Power Semiconductor Devices}, url = {https://ieeexplore.ieee.org/document/9178170}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9178170
12. Wölfle, J., Nitzsche, M., Ruthardt, J., Roth-Stielow, J.: Junction Temperature Control System to Increase the Lifetime of IGBT-Power-Modules in Synchronous Motor Drives Without Affecting Torque and Speed. IEEE Open Journal of Power Electronics. 1, 273–283 (2020).
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  @article{9159892, abstract = {Load changes of electrical machines driven by inverters cause temperature swings of the semiconductor devices in IGBT modules of the inverters. These temperature swings lead to mechanical strain in the different material layers of the IGBT-power-modules and limit the numbers of cycles to failure and therefore reduce the lifetime of the IGBTs. This paper presents a temperature control system which is paralleled to the standard torque control system. It aims to reduce the magnitude of temperature swings of the semiconductor devices of IGBT modules caused by load changes of an interior permanent magnet synchronous machine. The principle method is, to increase the temperature of the semiconductor devices of the IGBT-modules by creating higher power losses during low load conditions of the machine without affecting torque and speed. This reduces the magnitude of the load induced temperature swings of the semiconductor devices of IGBT-modules and increases its lifetime at the cost of increased power losses. Three variables have been identified that influence the power losses in inverter modules without necessarily affecting the output power of the permanent synchronous machine. These variables are switching frequency of the inverter, length of the clamping area when a discontinuous modulation is applied and the reactive component of the inverter current. The influence of each variable which regards to the losses in the IGBT-power-modules is explained and the related control methodology is described. The analytic results are verified by experimental results obtained from a test set up.}, author = {{Wölfle}, J. and {Nitzsche}, M. and {Ruthardt}, J. and {Roth-Stielow}, J.}, issn = {2644-1314}, journal = {IEEE Open Journal of Power Electronics}, pages = {273-283}, title = {Junction Temperature Control System to Increase the Lifetime of IGBT-Power-Modules in Synchronous Motor Drives Without Affecting Torque and Speed}, url = {https://ieeexplore.ieee.org/document/9159892}, volume = 1, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9159892
13. Sharma, K., Barón, K.M., Ruthardt, J., Hueckelheim, J., Koch, D., Muenzenmayer, F., Kallfass, I.: Characterization of the Junction Temperature of SiC Power Devices via Quasi-Threshold Voltage as Temperature Sensitive Electrical Parameter. In: CIPS 2020; 11th International Conference on Integrated Power Electronics Systems. pp. 1–6. , Berlin, Germany (2020).
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  @inproceedings{9097714, abstract = {This paper presents a robust and easy-to-implement approach to measure the junction temperature of SiC power devices using quasi-threshold voltage as temperature sensitive electrical parameter with adjustable temperature sensitivity. The voltage drop across the parasitic inductance between Kelvin and power source is used to trigger the data acquisition circuit. The novelty of the proposed method lies in the concept of variable temperature sensitivity where the robustness decreases with the increase in the sensitivity. This concept proposes a trade-off between temperature sensitivity and robustness. A D flip-flop is used to make the acquisition circuit more robust to prevent false triggering while keeping fast switching speed and low noise susceptibility. Basic simulations, static and dynamic measurements are performed successfully on a commercially available 1.2 kV/120 A power module in a buck converter topology. The effect of DC-link voltage and load current invariance is also verified in this paper.}, address = {Berlin, Germany}, author = {Sharma, Kanuj and Barón, Kevin Muñoz and Ruthardt, Johannes and Hueckelheim, Jan and Koch, Dominik and Muenzenmayer, Florian and Kallfass, Ingmar}, booktitle = {CIPS 2020; 11th International Conference on Integrated Power Electronics Systems}, eventdate = {24.-26. March 2020}, month = {March}, pages = {1-6}, title = {Characterization of the Junction Temperature of SiC Power Devices via Quasi-Threshold Voltage as Temperature Sensitive Electrical Parameter}, url = {https://ieeexplore.ieee.org/document/9097714}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9097714
14. Nitzsche, M., Barón, K.M., Ziegler, P., Wagner, F., Roth-Stielow, J.: Dynamic AC Power Cycling with Coupled Inverters Operating Under Application-Oriented Conditions. In: VDE (ed.) CIPS 2020; 11th International Conference on Integrated Power Electronics Systems. pp. 576–581. , Berlin, Germany (2020).
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  @inproceedings{9097745, abstract = {In order to determine the reliability of power semiconductor devices, power cycling tests are applied. Most commonly the necessary heat is generated by conduction losses in the die. As this does not reflect the loss generation in the application, this paper presents a new approach. The heat is generated by a combination of switching and conduction losses exactly as in the application. The inputs and outputs of two three-phase inverters are coupled in order to achieve circular energy flow and therefore high efficiency of the power cycling test. Furthermore, a novel 3D-printed aluminum module heat sink is designed and utilized to achieve the highest possible temperature dynamic.}, address = {Berlin, Germany}, author = {Nitzsche, Maximilian and Barón, Kevin Muñoz and Ziegler, Philipp and Wagner, Felix and Roth-Stielow, Jörg}, booktitle = {CIPS 2020; 11th International Conference on Integrated Power Electronics Systems}, editor = {VDE}, language = {English}, month = {March}, pages = {576-581}, title = {Dynamic AC Power Cycling with Coupled Inverters Operating Under Application-Oriented Conditions}, url = {https://ieeexplore.ieee.org/document/9097745}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9097745
15. Nitzsche, M., Zehelein, M., Weimer, J., Koch, D., Roth-Stielow, J.: Design Flow of a Compact High-Frequency DC/DC Converter with Optimum Average Efficiency in a Wide Operation Range. In: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). p. P.1-P.12 (2020).
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  @inproceedings{9215933, abstract = {The design of an LLC stage for a wide output voltage range imposes stringent challenges regarding electrical and thermal performance. To match these requirements this paper presents the design approach and measurements of a resonant LLC converter stage, optimized for a maximum average efficiency over a wide operating range.}, author = {{Nitzsche}, M. and {Zehelein}, M. and {Weimer}, J. and {Koch}, D. and {Roth-Stielow}, J.}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, month = {Sep.}, pages = {P.1-P.12}, title = {Design Flow of a Compact High-Frequency DC/DC Converter with Optimum Average Efficiency in a Wide Operation Range}, url = {https://ieeexplore.ieee.org/document/9215933}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9215933
16. Ruthardt, J., Schulte, H., Ziegler, P., Fischer, M., Nitzsche, M., Roth-Stielow, J.: Junction Temperature Control Strategy for Lifetime Extension of Power Semiconductor Devices. In: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). pp. 1–9 (2020).
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  @inproceedings{9215718, abstract = {The lifetime of power semiconductor devices mainly depends on their thermal stress. In particular, temperature swings cause damage due to different coefficients of thermal expansion of the different materials, which are used in power semiconductor devices. These temperature swings occur when the environmental temperature or the load conditions and with them the power losses change. Junction temperature controllers are able to extend the expected lifetime by reducing the occurring temperature swings. This paper proposes two control strategies to calculate a suitable set value for junction temperature controllers, which leads to a smoother temperature course with fewer swings. Both strategies do not affect the normal operation by for example limiting the output parameters. They affect the efficiency of the power electronic circuit to influence the power losses and thermal conditions.}, author = {{Ruthardt}, J. and {Schulte}, H. and {Ziegler}, P. and {Fischer}, M. and {Nitzsche}, M. and {Roth-Stielow}, J.}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, month = {Sep.}, pages = {1-9}, title = {Junction Temperature Control Strategy for Lifetime Extension of Power Semiconductor Devices}, url = {https://ieeexplore.ieee.org/document/9215718}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/9215718
2019
1. Zehelein, M., Fischer, M., Nitzsche, M., Roth-Stielow, J.: Influence of the Filter Design on Wide-Bandgap Voltage Source Inverters with Sine Wave Filter for Electrical Drives. In: 2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe). p. P.1-P.10. , Genova, Italy (2019). https://doi.org/10.23919/EPE.2019.8914968.
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  @inproceedings{8914968, abstract = {State-of-the-art electric drives are mainly equipped with two level three phase voltage source inverters offering an compact setup with good efficiency but electromagnetic interference is an issue especially in sensitive environments. Also bearing currents, excited by common-mode noise, can influence the reliability of the connected machine. To reduce these bearing currents and the inverter's electromagnetic compatibility an output filter can be used. Especially with wide band-gap semiconductors the reduced switching losses offer output filters with low volume. Furthermore, this filter offers several degrees of freedom to optimize the losses of the whole inverter system. Possible filter designs are investigated and compared with each other. A design methodology to find loss optimized filter configurations is presented. By modeling the whole inverter and filter system the losses of the system are calculated for every filter configuration iteratively at a desired operating point. These loss models consider soft switching behavior as well as high frequency losses of the passives to take also configurations with high filter choke current ripple into account.}, address = {Genova, Italy}, author = {Zehelein, Matthias and Fischer, Manuel and Nitzsche, Maximilian and Roth-Stielow, Jörg}, booktitle = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, doi = {10.23919/EPE.2019.8914968}, eventdate = {9/3/2019 - 9/5/2019}, language = {English}, month = {September}, pages = {P.1-P.10}, title = {Influence of the Filter Design on Wide-Bandgap Voltage Source Inverters with Sine Wave Filter for Electrical Drives}, url = {https://ieeexplore.ieee.org/document/8914968/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8914968/
2. Nitzsche, M., Cheshire, C., Fischer, M., Ruthardt, J., Roth-Stielow, J.: Comprehensive Comparison of a SiC MOSFET and Si IGBT Based Inverter. In: PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–7. VDE Verlag (2019).
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  @inproceedings{8767737, abstract = {The investment which is necessary to replace Si IGBTs with SiC MOSFETs in medium to high power DC-AC inverters needs to be balanced carefully against the advantages SiC offers. This paper compares a 20 kW Si IGBT inverter with a 20 kW SiC MOSFET inverter. The power semiconductor components are operated identically in a modular half bridge module to ensure comparability. Thereby the measurement of the switching losses is explicitly not the focus but the overall efficiency while taking volume, current ripple, switching frequency and inductance into account. The limits of reasonable operating range shall be evaluated and an overview on the benefits of SiC on system level will be given.}, author = {Nitzsche, Maximilian and Cheshire, Christoph and Fischer, Manuel and Ruthardt, Johannes and Roth-Stielow, Jörg}, booktitle = {PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, eventdate = {7. - 9. Mai 2019}, isbn = {978-3-8007-4938-6}, month = may, pages = {1-7}, publisher = {VDE Verlag}, title = {Comprehensive Comparison of a SiC MOSFET and Si IGBT Based Inverter}, year = 2019 }
3. Fischer, M., Malić, R., Tröster, N., Ruthardt, J., Roth-Stielow, J.: Design of a three-phase 100 A linear amplifier for power-hardware-in-the-loop machine emulation. IET: The Journal of Engineering. 2019, 4041 – 4044 (2019). https://doi.org/10.1049/joe.2018.8142.
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  BibTeX
  @article{fischer2019design, author = {Fischer, Manuel and Malić, Robert and Tröster, Nathan and Ruthardt, Johannes and Roth-Stielow, Jörg}, doi = {10.1049/joe.2018.8142}, issn = {2051-3305}, journal = {IET: The Journal of Engineering}, month = jun, number = 17, pages = {4041 – 4044}, title = {Design of a three-phase 100 A linear amplifier for power-hardware-in-the-loop machine emulation}, volume = 2019, year = 2019 }
4. Fischer, M., Ruthardt, J., Nitzsche, M., Ziegler, P., Roth-Stielow, J.: Investigation on Carrier Signals to Minimize the Overall Current Ripple of an Interleaved-Switched Inverter. In: PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–6. VDE Verlag (2019).
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  BibTeX
  @inproceedings{8767709, abstract = {This paper proposes a method to minimize the overall output current ripple of an interleaved-switched inverter with several half bridge branches per phase. Therefore, two types of temporal shift between the carrier signals of different branches and phases are defined. In order to get the smallest possible overall current ripple, a dynamic variation of these two temporal shifts is investigated.}, author = {Fischer, Manuel and Ruthardt, Johannes and Nitzsche, Maximilian and Ziegler, Philipp and Roth-Stielow, Jörg}, booktitle = {PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, eventdate = {7. - 9. Mai 2019}, isbn = {978-3-8007-4938-6}, language = {English}, month = may, pages = {1-6}, publisher = {VDE Verlag}, title = {Investigation on Carrier Signals to Minimize the Overall Current Ripple of an Interleaved-Switched Inverter}, year = 2019 }
5. Ruthardt, J., Hermann, C., Wölfle, J., Fischer, M., Roth-Stielow, J.: Gate-driver circuit with a variable supply voltage to influence the switching losses. The Journal of Engineering. 2019, 3692--3695 (2019). https://doi.org/10.1049/joe.2018.8129.
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  BibTeX
  @article{Ruthardt_2019, abstract = {The lifetime of semiconductor devices used in power electronics depends on the junction temperature. With a suitable junction temperature control system, the lifetime of semiconductor devices is extended. These control systems require a possibility to influence the power losses of the semiconductor devices and therefore the junction temperature. The proposed gate-driver circuit has a variable supply voltage in order to influence the switching speed of the semiconductor devices. This affects the switching losses. In addition, the adjustable switching speed can be used to prevent voltage overshoots during the switching transition or to decrease electromagnetic emission. The main advantage of this gate-driver circuit is its simple structure. This study focuses on the switching losses. }, author = {Ruthardt, Johannes and Hermann, Chris and Wölfle, Julian and Fischer, Manuel and Roth-Stielow, Jörg}, doi = {10.1049/joe.2018.8129}, issn = {2051-3305}, journal = {The Journal of Engineering}, language = {English}, month = jun, number = 17, pages = {3692--3695}, publisher = {Institution of Engineering and Technology ({IET})}, title = {Gate-driver circuit with a variable supply voltage to influence the switching losses}, url = {https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8129}, volume = 2019, year = 2019 }
  Link
  https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8129
6. Bintz, S., Fischer, M., Roth-Stielow, J.: Load Emulation for Electrolysis Rectifiers. In: 13th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2019). IEEE (2019).
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  @inproceedings{bintz2019emulation, author = {Bintz, Steffen and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {13th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2019)}, eventdate = {9 – 12 July 2019}, language = {English}, month = {July}, publisher = {IEEE}, title = {Load Emulation for Electrolysis Rectifiers}, year = 2019 }
7. Zehelein, M., Portik, J., Nitzsche, M., Marx, P., Roth-Stielow, J.: Reduction of the Leakage Currents by Switching Transition Synchronization for a Four-Switch Buck-Boost Converter. In: 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia). pp. 2217–2223. IEEE (2019).
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  BibTeX
  @inproceedings{8796950, abstract = {Wide-bandgap transistors are operated at much higher switching transition voltage slopes and current slopes compared to silicon power transistors. For the design of new power electronic devices compactness is a main focus, which increases parasitic capacitances of the device. This trend leads to significantly higher common and differential mode distortions especially at high frequency ranges. To overcome this drawback, efficient filter techniques for these distortions are necessary. This paper focuses on the leakage current reduction in four switch buck-boost converter topologies by synchronizing the switching transitions of the buck and boost stage to achieve a leakage current cancellation. By designing two similar leakage current paths and using destructive interference of two inversely excited leakage currents, the overall leakage current at the heat sink of the device is decreased. This study investigates the effectiveness of the leakage current reduction depending on different operating points for buck and boost operation.}, author = {Zehelein, Matthias and Portik, Julian and Nitzsche, Maximilian and Marx, Philipp and Roth-Stielow, Jörg}, booktitle = {2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)}, eventdate = {27-30 May 2019}, month = may, organization = {IEEE}, pages = {2217-2223}, title = {Reduction of the Leakage Currents by Switching Transition Synchronization for a Four-Switch Buck-Boost Converter}, year = 2019 }
8. Speckmann, F.-W., Bintz, S., Birke, K.P.: Influence of rectifiers on the energy demand and gas quality of alkaline electrolysis systems in dynamic operation. Applied Energy. 250, 855–863 (2019). https://doi.org/10.1016/j.apenergy.2019.05.014.
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  @article{SPECKMANN2019855, abstract = {This paper investigates the correlation between different rectifier topologies and the energy demand as well as the gas quality of an alkaline electrolysis. The focus lies on recent scenarios which require partial load operation of electrolyzers. The layout-dependent current outputs of three conventional and a self-developed rectifier were simulated based on actual measurement data. After the down-scaling of the acquired current profiles, these were applied to a lab-scale alkaline electrolyzer. The rectifier structures are assessed for dynamic operation between 25% and 100% of their nominal load. Experimental results show a strong influence of the rectified current quality on the required electrical energy of the electrolysis process. Conventional thyristor structures with a high current ripple consume up to 13% more energy compared to the newly designed process current source, which provides an almost perfectly smoothed direct current. Additionally, high current ripples, which occur especially in low load scenarios, cause oxygen to diffuse to the hydrogen half cell and reduce the product gas purity. Therefore, not every rectifier is suited for dynamic operation of electrolysis systems.}, author = {Speckmann, Friedrich-W. and Bintz, Steffen and Birke, Kai Peter}, doi = {https://doi.org/10.1016/j.apenergy.2019.05.014}, issn = {0306-2619}, journal = {Applied Energy}, pages = {855 - 863}, title = {Influence of rectifiers on the energy demand and gas quality of alkaline electrolysis systems in dynamic operation}, url = {https://doi.org/10.1016/j.apenergy.2019.05.014}, volume = 250, year = 2019 }
  Link
  https://doi.org/10.1016/j.apenergy.2019.05.014
9. Ruthardt, J., Ziegler, P., Fischer, M., Roth-Stielow, J.: Model Based Junction Temperature Control Using the Gate Driver Voltage as a Correction Variable. In: 2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe). p. P.1-P.8. , Genova, Italy (2019). https://doi.org/10.23919/EPE.2019.8915157.
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  @inproceedings{8915157, abstract = {Junction temperature swings, caused by load alternation in power electronics, lead to a reduced lifetime of power semiconductor devices. When temperature swings occur, the different material layers of the power semiconductor device expand in a different way because of their different coefficient of thermal expansion. The result is mechanical strain between these layers. Junction temperature control systems are able to minimize the occurring temperature swings and to smooth the junction temperature course. Thus, the expected lifetime of the power semiconductor device is extended. A possibility to affect the junction temperature and the value of the junction temperature are required to realize such a control system. This paper proposes a model based junction temperature control system for lifetime extension of the power semiconductor devices using the gate driver's supply voltage as a correction variable. Therefore, the junction temperature is calculated by a thermal model with the load condition as an input variable.}, address = {Genova, Italy}, author = {Ruthardt, Johannes and Ziegler, Philipp and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, doi = {10.23919/EPE.2019.8915157}, eventdate = {9/3/2019 - 9/5/2019}, language = {English}, month = {Sep.}, pages = {P.1-P.8}, title = {Model Based Junction Temperature Control Using the Gate Driver Voltage as a Correction Variable}, url = {https://ieeexplore.ieee.org/document/8915157/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8915157/
10. Ruthardt, J., Muñoz Barón, K., Marx, P., Sharma, K., Nitzsche, M., Fischer, M., Roth-Stielow, J.: Online Junction Temperature Measurement via Internal Gate Resistance Using the High Frequency Gate Signal Injection Method. In: PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–7. VDE Verlag (2019).
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  BibTeX
  @inproceedings{8767601, abstract = {In many power electronic applications, it is important to monitor the junction temperature of the power semiconductor devices. This enables for example an abnormal temperature protection, lifetime monitoring or junction temperature control. This paper proposes an online junction temperature measurement based on the internal gate resistance as a temperature sensitive electrical parameter. A direct measurement of this resistance is not possible. Therefore, a high frequency signal is injected into the gate circuit to measure the gate circuit's impedance, which includes the temperature sensitive internal gate resistance. This paper focuses on a simple realization of this method.}, author = {Ruthardt, Johannes and Muñoz Barón, Kevin and Marx, Philipp and Sharma, Kanuj and Nitzsche, Maximilian and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, eventdate = {7. - 9. Mai 2019}, isbn = {978-3-8007-4938-6}, language = {English}, month = may, pages = {1-7}, publisher = {VDE Verlag}, title = {Online Junction Temperature Measurement via Internal Gate Resistance Using the High Frequency Gate Signal Injection Method}, year = 2019 }
11. Bintz, S., Häfele, D., Ketchedjian, V., Roth-Stielow, J.: Parallel-Serial-Rectifier for Power-to-Hydrogen Applications. In: 2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe). p. P.1-P.11. , Genova, Italy (2019). https://doi.org/10.23919/EPE.2019.8915526.
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  @inproceedings{8915526, abstract = {This paper presents a new rectifier topology for energy storage utilizing electrolysis in low voltage power grids without the typically needed isolation transformer. The proposed concept uses a voltage addition to pre-shape the input voltage of the rectifier to obtain a smoothed output voltage. At the grid connection, a current addition is designated to provide a good power factor. The power electronic concept as well as its control strategy have been developed and adapted according to power quality and efficiency. The rectifier concept is proven by simulation and measurements on a kilowatt-scale demonstrator.}, address = {Genova, Italy}, author = {Bintz, Steffen and Häfele, Daniel and Ketchedjian, Vasken and Roth-Stielow, Jörg}, booktitle = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, doi = {10.23919/EPE.2019.8915526}, eventdate = {9/3/2019 - 9/5/2019}, language = {English}, month = {September}, pages = {P.1-P.11}, title = {Parallel-Serial-Rectifier for Power-to-Hydrogen Applications}, url = {https://ieeexplore.ieee.org/document/8915526/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8915526/
12. Zehelein, M., Ruthardt, J., Nitzsche, M., Tymosch, T., Roth-Stielow, J.: Leakage current reduction for a double-leg boost converter by switching transition synchronisation. The Journal of Engineering. 2019, 3789–3792 (2019). https://doi.org/10.1049/joe.2018.8128.
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  BibTeX
  @article{iet:/content/journals/10.1049/joe.2018.8128, abstract = {With wide-bandgap transistors, the leakage current through the parasitic transistor to heat sink capacitance is increased with the operation at higher switching transition voltage slopes. This study presents a modulation synchronisation method for a double-leg boost converter to reduce these leakage currents. Having a similar leakage current path, the transistors turn-on transition of one leg is synchronised on the turn-off transition of the second leg.}, author = {Zehelein, Matthias and Ruthardt, Johannes and Nitzsche, Maximilian and Tymosch, Tobias and Roth-Stielow, Jörg}, copyright = {This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)}, doi = {10.1049/joe.2018.8128}, issn = {2051-3305}, journal = {The Journal of Engineering}, language = {English}, month = {June}, number = 17, pages = {3789-3792}, publisher = {Institution of Engineering and Technology}, title = {Leakage current reduction for a double-leg boost converter by switching transition synchronisation}, url = {https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8128}, volume = 2019, year = 2019 }
  Link
  https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8128
13. Nitzsche, M., Zehelein, M., Roth-Stielow, J.: Design of a full SiC three-phase power factor correction with an interleaved output buck converter. The Journal of Engineering. 2019, 4143--4146 (2019). https://doi.org/10.1049/joe.2018.8127.
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  BibTeX
  @article{Nitzsche_2019, abstract = {Active rectification of the three-phase grid nowadays is a central task of power electronics. However, as the necessary DC bus voltages vary, DC-DC converters are needed. This study presents the design and development of a three-phase power factor correction with an interleaved buck converter in the output stage. The power stage switches are equipped with silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors. A modular setup of the half-bridge modules as well as low inductive design of these modules is put into focus. }, author = {Nitzsche, Maximilian and Zehelein, Matthias and Roth-Stielow, Jörg}, doi = {10.1049/joe.2018.8127}, issn = {2051-3305}, journal = {The Journal of Engineering}, language = {English}, month = jun, number = 17, pages = {4143--4146}, publisher = {Institution of Engineering and Technology ({IET})}, title = {Design of a full {SiC} three-phase power factor correction with an interleaved output buck converter}, url = {https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8127}, volume = 2019, year = 2019 }
  Link
  https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8127
14. Bintz, S., Haarer, J., Roth-Stielow, J.: Repetitive Controller for Low Grid Current Harmonics in a Hybrid Parallel Electrolysis Rectifier. In: NEIS 2019; Conference on Sustainable Energy Supply and Energy Storage Systems. pp. 1–7 (2019).
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  @inproceedings{9000481, abstract = {As water electrolysis for energy storage or sector coupling becomes more relevant, suitable rectifiers for grid integration are needed. A promising rectifier concept for this application is a combination of a thyristor rectifier, which offers a high efficiency at the needed high currents, and a parallel voltage source inverter (VSI) for grid current correction and DC-output smoothing at the same time [1]. However, as the desired low grid current harmonics can only hardly be achieved with a conventional controller, a repetitive control concept for the VSI is introduced. The proposed system is verified with measurements on a 5 kW demonstrator circuit of the proposed topology.}, author = {{Bintz}, S. and {Haarer}, J. and {Roth-Stielow}, J.}, booktitle = {NEIS 2019; Conference on Sustainable Energy Supply and Energy Storage Systems}, month = {Sep.}, pages = {1-7}, title = {Repetitive Controller for Low Grid Current Harmonics in a Hybrid Parallel Electrolysis Rectifier}, url = {https://ieeexplore.ieee.org/document/9000481}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/9000481
15. Fischer, M., Gliese, F., Ruthardt, J., Zehelein, M., Roth-Stielow, J.: Investigation on a Three-Phase Inverter with LC Output Filter for Machine Emulation. In: 2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe). p. P.1-P.8. , Genova, Italy (2019). https://doi.org/10.23919/EPE.2019.8915550.
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  @inproceedings{8915550, abstract = {In addition to a real-time operating machine model an applicable power electronic device is required to emulate the electric behavior of machines. Typically, multilevel inverters are utilized for this purpose. This power electronic device comes with the problem of switched-mode operation which leads to additional disturbing ripple content in the output current. In order to damp the negative influence of switched-mode operation, the suitability of a three-phase inverter with LC output filter for use in a power-hardware-in-the-loop machine emulator is analyzed within this paper. At first the setup of this inverter concept is presented. Afterwards, the paper describes a strategy to control the inverter's output voltages achieving machine-emulating behavior. The operation as machine emulator is demonstrated in simulation results, finally.}, address = {Genova, Italy}, author = {Fischer, Manuel and Gliese, Felix and Ruthardt, Johannes and Zehelein, Matthias and Roth-Stielow, Jörg}, booktitle = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, doi = {10.23919/EPE.2019.8915550}, eventdate = {9/3/2019 - 9/5/2019}, language = {English}, month = {September}, pages = {P.1-P.8}, title = {Investigation on a Three-Phase Inverter with LC Output Filter for Machine Emulation}, url = {https://ieeexplore.ieee.org/document/8915550/}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8915550/
2018
1. Ruthardt, J., Wölfle, J., Tröster, N., Fischer, M., Roth-Stielow, J.: Dead Time as a Correction Variable for Junction Temperature Control. In: 20th European conference on power electronics and applications. IEEE (2018).
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  @inproceedings{noauthororeditor2018, author = {Ruthardt, Johannes and Wölfle, Julian and Tröster, Nathan and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {20th European conference on power electronics and applications}, month = {September}, publisher = {IEEE}, title = {Dead Time as a Correction Variable for Junction Temperature Control}, year = 2018 }
2. Ruthardt, J., Fischer, M., Wölfle, J., Tröster, N., Roth-Stielow, J.: Three-Level-gate-Driver to Run Power Transistors in the Saturation Region for Junction Temperature Control. In: Mesago PCIM GmbH, S. (ed.) International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM). pp. 1562–1569. VDE (2018).
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  @inproceedings{ruthardt2018threelevelgatedriver, author = {Ruthardt, Johannes and Fischer, Manuel and Wölfle, Julian and Tröster, Nathan and Roth-Stielow, Jörg}, booktitle = {International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM)}, editor = {Mesago PCIM GmbH, Stuttgart}, isbn = {ISBN 978-3-8007-4646-0}, month = {Juni}, pages = {1562-1569}, publisher = {VDE}, title = {Three-Level-gate-Driver to Run Power Transistors in the Saturation Region for Junction Temperature Control}, year = 2018 }
3. Ruthardt, J., Hermann, C., Wölfle, J., Fischer, M., Roth-Stielow, J.: Gate Driver Circuit with a Variable Supply Voltage to Influence the Switching Losses. In: The 9th International Conference on Power Electronics, Machines and Drives (PEMD). IET (2018).
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  @inproceedings{ruthardt2018driver, author = {Ruthardt, Johannes and Hermann, Chris and Wölfle, Julian and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {The 9th International Conference on Power Electronics, Machines and Drives (PEMD)}, month = {April}, publisher = {IET}, title = {Gate Driver Circuit with a Variable Supply Voltage to Influence the Switching Losses}, year = 2018 }
4. Tröster, N., Ruthardt, J., Nitzsche, M., Wölfle, J., Roth-Stielow, J.: Wide Bandwidth Current Sensor combining a Coreless Current Transformer and TMR Sensors. In: Mesago PCIM GmbH, S. (ed.) International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM). pp. 1349–1355. VDE (2018).
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  @inproceedings{troster2018bandwidth, author = {Tröster, Nathan and Ruthardt, Johannes and Nitzsche, Maximilian and Wölfle, Julian and Roth-Stielow, Jörg}, booktitle = {International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM)}, editor = {Mesago PCIM GmbH, Stuttgart}, isbn = {ISBN 978-3-8007-4646-0}, month = {Juni}, pages = {1349-1355}, publisher = {VDE}, title = {Wide Bandwidth Current Sensor combining a Coreless Current Transformer and TMR Sensors}, url = {https://ieeexplore.ieee.org/document/8403012}, year = 2018 }
  Link
  https://ieeexplore.ieee.org/document/8403012
5. Zehelein, M., Ruthardt, J., Nitzsche, M., Tymosch, T., Roth-Stielow, J.: Leakage current reduction for a double-leg boost-converter by switching transition synchronization. In: Journal of Engineering; The 9th International Conference on Power Electronics, Machines and Drives (PEMD). IET (2018).
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  BibTeX
  @inproceedings{pemd2018leakage, abstract = {With wide-bandgap transistors, the leakage current through the parasitic transistor to heat sink capacitance is increased with the operation at higher switching transition voltage slopes. This study presents a modulation synchronisation method for a double-leg boost converter to reduce these leakage currents. Having a similar leakage current path, the transistors turn-on transition of one leg is synchronised on the turn-off transition of the second leg.}, author = {Zehelein, Matthias and Ruthardt, Johannes and Nitzsche, Maximilian and Tymosch, Tobias and Roth-Stielow, Jörg}, booktitle = {Journal of Engineering; The 9th International Conference on Power Electronics, Machines and Drives (PEMD)}, month = {April}, publisher = {IET}, title = {Leakage current reduction for a double-leg boost-converter by switching transition synchronization}, url = {https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8128}, year = 2018 }
  Link
  https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8128
6. Bintz, S., Fischer, M., Roth-Stielow, J.: Parallel Rectifier for Regenerative Hydrogen Production Utilizing a Combination of Thyristor and PWM-based Topologies. In: Proceedings of the EPE 2018 conference. IEEE (2018).
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  BibTeX
  @inproceedings{bintz2018parallel, author = {Bintz, Steffen and Fischer, Manuel and Roth-Stielow, Jörg}, booktitle = {Proceedings of the EPE 2018 conference}, eventdate = {18.9. - 20.9.2018}, eventtitle = {EPE 2018}, month = {September}, publisher = {IEEE}, title = {Parallel Rectifier for Regenerative Hydrogen Production Utilizing a Combination of Thyristor and PWM-based Topologies}, year = 2018 }
7. Nitzsche, M., Zehelein, M., Roth-Stielow, J.: Design of a full SiC 3-phase power factor correction with interleaved output buck converter. In: Journal of Engineering; The 9th International Conference on Power Electronics, Machines and Drives (PEMD). IET (2018). https://doi.org/10.1049/joe.2018.8127.
  - BibTeX
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  BibTeX
  @inproceedings{nitzsche2018design, author = {Nitzsche, Maximilian and Zehelein, Matthias and Roth-Stielow, Jörg}, booktitle = {Journal of Engineering; The 9th International Conference on Power Electronics, Machines and Drives (PEMD)}, doi = {10.1049/joe.2018.8127}, month = {April}, publisher = {IET}, title = {Design of a full SiC 3-phase power factor correction with interleaved output buck converter}, url = {https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8127}, year = 2018 }
  Link
  https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8127
8. Fischer, M., Malić, R., Tröster, N., Ruthardt, J., Roth-Stielow, J.: Design of a Three-Phase 100 Ampere Linear Amplifier for Power-Hardware-in-the-Loop Machine-Emulation. In: The 9th International Conference on Power Electronics, Machines and Drives (PEMD). IET (2018).
  - BibTeX
  BibTeX
  @inproceedings{fischer2018design, author = {Fischer, Manuel and Malić, Robert and Tröster, Nathan and Ruthardt, Johannes and Roth-Stielow, Jörg}, booktitle = {The 9th International Conference on Power Electronics, Machines and Drives (PEMD)}, month = {April}, publisher = {IET}, title = {Design of a Three-Phase 100 Ampere Linear Amplifier for Power-Hardware-in-the-Loop Machine-Emulation}, year = 2018 }
9. Wölfle, J., Pitters, M., Ruthardt, J., Schuster, J., Stempfle, M., Roth-Stielow, J.: Comparision of Two Model based Temperature Control Systems Implemented on a Three Level T-Type Inverter. In: Mesago PCIM GmbH, S. (ed.) International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM). pp. 1520–1527. VDE (2018).
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  BibTeX
  @inproceedings{wolfle2018comparision, author = {Wölfle, Julian and Pitters, Matthias and Ruthardt, Johannes and Schuster, Johannes and Stempfle, Martin and Roth-Stielow, Jörg}, booktitle = {International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM)}, editor = {Mesago PCIM GmbH, Stuttgart}, isbn = {ISBN 978-3-8007-4646-0}, month = {Juni}, pages = {1520-1527}, publisher = {VDE}, title = {Comparision of Two Model based Temperature Control Systems Implemented on a Three Level T-Type Inverter}, year = 2018 }
10. Nitzsche, M., Zehelein, M., Tröster, N., Roth-Stielow, J.: Precise Voltage Measurement for Power Electronics with High Switching Frequencies. In: Mesago PCIM GmbH, S. (ed.) International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM). pp. 1356–1361. VDE (2018).
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  @inproceedings{nitzsche2018precise, author = {Nitzsche, Maximilian and Zehelein, Matthias and Tröster, Nathan and Roth-Stielow, Jörg}, booktitle = {International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM)}, editor = {Mesago PCIM GmbH, Stuttgart}, isbn = {ISBN 978-3-8007-4646-0}, month = {Juni}, pages = {1356-1361}, publisher = {VDE}, title = {Precise Voltage Measurement for Power Electronics with High Switching Frequencies}, url = {https://ieeexplore.ieee.org/document/8403013}, year = 2018 }
  Link
  https://ieeexplore.ieee.org/document/8403013
11. Fischer, M., Petzner, S., Ruthardt, J., Schuster, J., Bintz, S., Roth-Stielow, J.: Current Control for a Multiphase Interleaved-Switched Inverter Using Field Oriented Coordinates. Presented at the (2018).
  - BibTeX
  BibTeX
  @inproceedings{fischer2018current, author = {Fischer, Manuel and Petzner, Sven and Ruthardt, Johannes and Schuster, Johannes and Bintz, Steffen and Roth-Stielow, Jörg}, month = {September}, publisher = {IEEE}, title = {Current Control for a Multiphase Interleaved-Switched Inverter Using Field Oriented Coordinates}, year = 2018 }
12. Speckmann, F.-W., Bintz, S., Groninger, M.L., Birke, K.P.: Alkaline Electrolysis with Overpotential-Reducing Current Profiles. Journal of The Electrochemical Society. 165, F456--F462 (2018). https://doi.org/10.1149/2.0511807jes.
  - BibTeX
  - Link
  BibTeX
  @article{Speckmann_2018, author = {Speckmann, F.-W. and Bintz, S. and Groninger, M. L. and Birke, K. P.}, doi = {10.1149/2.0511807jes}, journal = {Journal of The Electrochemical Society}, number = 7, pages = {F456--F462}, publisher = {The Electrochemical Society}, title = {Alkaline Electrolysis with Overpotential-Reducing Current Profiles}, url = {https://doi.org/10.1149%2F2.0511807jes}, volume = 165, year = 2018 }
  Link
  https://doi.org/10.1149%2F2.0511807jes
13. Schuster, J., Ketchedjian, V., Roth-Stielow, J.: Sensorless Position Estimation for an Externally Excited Synchronous Machine over the Whole Speed Range. In: Mesago PCIM GmbH, S. (ed.) International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM). pp. 1192–1198. VDE (2018).
  - BibTeX
  BibTeX
  @inproceedings{schuster2018sensorless, author = {Schuster, Johannes and Ketchedjian, Vasken and Roth-Stielow, Jörg}, booktitle = {International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings (PCIM)}, editor = {Mesago PCIM GmbH, Stuttgart}, isbn = {ISBN 978-3-8007-4646-0}, month = {Juni}, pages = {1192-1198}, publisher = {VDE}, title = {Sensorless Position Estimation for an Externally Excited Synchronous Machine over the Whole Speed Range}, year = 2018 }
14. Bintz, S., Speckmann, F.W., Roth-Stielow, J.: Process Current Source for Investigation on Current Waveform in Electrolysis Process. ECS Transactions. 83, 195--209 (2018). https://doi.org/10.1149/08301.0195ecst.
  - BibTeX
  BibTeX
  @article{Bintz_2018, author = {Bintz, Steffen and Speckmann, Friedrich Wilhelm and Roth-Stielow, Jörg}, doi = {10.1149/08301.0195ecst}, journal = {{ECS} Transactions}, month = jan, number = 1, pages = {195--209}, publisher = {The Electrochemical Society}, title = {Process Current Source for Investigation on Current Waveform in Electrolysis Process}, volume = 83, year = 2018 }
15. Tröster, N., Eisenhardt, T., Zehelein, M., Wölfle, J., Ruthardt, J., Roth-Stielow, J.: Improvements of a Coaxial Current Sensor with a Wide Bandwidth Based on the HOKA Principle. Presented at the (2018).
  - BibTeX
  BibTeX
  @inproceedings{troster2018improvements, author = {Tröster, Nathan and Eisenhardt, Torsten and Zehelein, Matthias and Wölfle, Julian and Ruthardt, Johannes and Roth-Stielow, Jörg}, month = {September}, publisher = {IEEE}, title = {Improvements of a Coaxial Current Sensor with a Wide Bandwidth Based on the HOKA Principle}, year = 2018 }
2017
1. Schuster, J., Ketchedjian, V., Roth-Stielow, J.: Sensorless position estimation at low speeds till standstill with reduced filtering requirements for an externally exited synchronous machine. In: 2017 IEEE International Symposium on Sensorless Control for Electrical Drives (SLED). IEEE (2017). https://doi.org/10.1109/sled.2017.8078422.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{SLED_Schuster_2017, author = {Schuster, Johannes and Ketchedjian, Vasken and Roth-Stielow, Jorg}, booktitle = {2017 {IEEE} International Symposium on Sensorless Control for Electrical Drives ({SLED})}, doi = {10.1109/sled.2017.8078422}, month = sep, publisher = {{IEEE}}, title = {Sensorless position estimation at low speeds till standstill with reduced filtering requirements for an externally exited synchronous machine}, url = {https://doi.org/10.1109%2Fsled.2017.8078422}, year = 2017 }
  Link
  https://doi.org/10.1109%2Fsled.2017.8078422
2. Tröster, N., Dominković, B., Wölfle, J., Fischer, M., Roth-Stielow, J.: Wide bandwidth current probe for power electronics using tunneling magnetoresistance sensors. In: 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS). pp. 35–40 (2017). https://doi.org/10.1109/PEDS.2017.8289128.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{trster2017bandwidth, abstract = {This paper presents a contact-free current probe, developed to measure typical current profiles which appear in power electronic circuits. For high switching frequencies and steep current slopes the requirement for the dynamic of the current probe is high. This means the current probe needs a wide bandwidth from DC up to several megahertz. This is achieved by the combination of two current measurement principles, Tunneling Magnetoresistance (TMR) sensors and a Rogowski coil.}, author = {Tröster, N. and Dominković, B. and Wölfle, J. and Fischer, M. and Roth-Stielow, J.}, booktitle = {2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS)}, doi = {10.1109/PEDS.2017.8289128}, month = dec, pages = {35-40}, title = {Wide bandwidth current probe for power electronics using tunneling magnetoresistance sensors}, url = {https://doi.org/10.1109/PEDS.2017.8289128}, year = 2017 }
  Link
  https://doi.org/10.1109/PEDS.2017.8289128
3. Ruthardt, J., Blank, F., Wölfle, J., Tröster, N., Roth-Stielow, J.: Power supply with active energy storage to reuse the braking energy for servo drives. In: 2017 19th European Conference on Power Electronics and Applications (EPE’17 ECCE Europe). p. P.1-P.9 (2017). https://doi.org/10.23919/EPE17ECCEEurope.2017.8099002.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8099002, author = {Ruthardt, J. and Blank, F. and Wölfle, J. and Tröster, N. and Roth-Stielow, J.}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)}, doi = {10.23919/EPE17ECCEEurope.2017.8099002}, month = {Sept}, pages = {P.1-P.9}, title = {Power supply with active energy storage to reuse the braking energy for servo drives}, url = {https://doi.org/10.23919%2Fepe17ecceeurope.2017.8099002}, year = 2017 }
  Link
  https://doi.org/10.23919%2Fepe17ecceeurope.2017.8099002
4. Wölfle, J., Röser, T., Nitzsche, M., Tröster, N., Stempfle, M., Ruthardt, J., Roth-Stielow, J.: Model based temperature control system to increase the expected lifetime of IGBT power modules executed on a neutral point diode clamped three level inverter. In: 2017 19th European Conference on Power Electronics and Applications (EPE’17 ECCE Europe). p. P.1-P.9 (2017). https://doi.org/10.23919/EPE17ECCEEurope.2017.8099156.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8099156, author = {Wölfle, J. and Röser, T. and Nitzsche, M. and Tröster, N. and Stempfle, M. and Ruthardt, J. and Roth-Stielow, J.}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)}, doi = {10.23919/EPE17ECCEEurope.2017.8099156}, month = {Sept}, pages = {P.1-P.9}, title = {Model based temperature control system to increase the expected lifetime of IGBT power modules executed on a neutral point diode clamped three level inverter}, url = {https://doi.org/10.23919/EPE17ECCEEurope.2017.8099156}, year = 2017 }
  Link
  https://doi.org/10.23919/EPE17ECCEEurope.2017.8099156
5. Woelfle, J., Nitzsche, M., Troester, N., Stempfle, M., Roth-Stielow, J.: Comparison of Three Model Based Junction Temperature Control Systems to Increase the Lifetime of IGBT-Power-Modules. In: PCIM Europe - Nuremberg, Germany. VDE (2017).
  - BibTeX
  - Link
  BibTeX
  @inproceedings{woelfle2017pcim, author = {Woelfle, Julian and Nitzsche, Maximilian and Troester, Nathan and Stempfle, Martin and Roth-Stielow, Jörg}, booktitle = {PCIM Europe - Nuremberg, Germany }, isbn = {978-3-8007-4424-4}, month = may, publisher = {VDE}, title = {Comparison of Three Model Based Junction Temperature Control Systems to Increase the Lifetime of IGBT-Power-Modules}, url = {http://ieeexplore.ieee.org/document/7990877/}, year = 2017 }
  Link
  http://ieeexplore.ieee.org/document/7990877/
6. Schramm, A., Sworowski, E., Roth-Stielow, J.: Compensation of torque ripples in permanent magnet synchronous machines up to the field weakening range. In: 2017 7th International Electric Drives Production Conference (EDPC). pp. 1–8 (2017). https://doi.org/10.1109/EDPC.2017.8328154.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8328154, abstract = {In this paper, a method for compensation of torque ripples in permanent magnet synchronous machines is presented. The motivation is to reduce torque-ripple-induced vibration and acoustic noise. Since the torque ripples are predominant in the field weakening range the focus is to set up a compensation method in high-speed ranges. Based on the modeled torque ripple effects, an optimized control strategy is developed to realize a precise harmonic voltage excitation. Furthermore, the limiting factor of the available voltage in the field weakening range is considered and an extended control strategy is introduced to allow a compensation of torque ripples close to the voltage limit.}, author = {Schramm, A. and Sworowski, E. and Roth-Stielow, J.}, booktitle = {2017 7th International Electric Drives Production Conference (EDPC)}, doi = {10.1109/EDPC.2017.8328154}, month = dec, pages = {1-8}, title = {Compensation of torque ripples in permanent magnet synchronous machines up to the field weakening range}, url = {https://doi.org/10.1109/EDPC.2017.8328154}, year = 2017 }
  Link
  https://doi.org/10.1109/EDPC.2017.8328154
7. Fischer, M., Roth-Stielow, J.: Analysis of the Influence of Static and Dynamic Eccentricity on Back EMF of a Permanent Magnet Synchronous Motor. In: Innovative Small Drives and Micro-Motor Systems; 11th GMM/ETG-Symposium. pp. 1–6 (2017).
  - BibTeX
  BibTeX
  @inproceedings{8241180, abstract = {In this paper the measurement results that represent the back electromotive force (EMF) of a small drive permanent magnet synchronous machine (PMSM) are proposed. The focus is on the comparison between three mechanical configurations: the original one and a setup with static and dynamic eccentricity. Additionally, the influence of compensating currents is considered due to the circuitry of the windings belonging to one phase. This leads to quite similar gradients of back EMF in all three mechanical configurations. The PMSM consists of an external rotor, has a pole pair number of 4 and a mechanical output power of 240 W. Each electric phase consists of four windings. Two of them are serial connected and both serial connections are parallel connected. If the partial back EMF at one winding is not equal to the back EMF at windings of the same phase, compensating currents will occur and will counteract the partial back EMF. This happens especially in case of static and dynamic eccentricity. In these cases the air gap length as well as the partial back EMF depend besides on the position also on the angle between the rotor and the stator of the machine. To analyse the back EMF at several operating points, a machine test bench is set up. In order to measure the partial back EMF, the machine is equipped with additional stator windings. Furthermore, the parallel connections of the windings are disconnected and the pins are led through the machine's package. On the one hand, it is possible to leave the connection open-circuited to avoid compensating currents. On the other hand, the connection can be restored using an amperemeter, which enables a measurement of the intensity of the compensating currents at different operating points. Due to mechanical modifications on the machine it is possible to analyse the specific influence of static and dynamic eccentricity.}, author = {Fischer, M. and Roth-Stielow, J.}, booktitle = {Innovative Small Drives and Micro-Motor Systems; 11th GMM/ETG-Symposium}, month = {Sept}, pages = {1-6}, title = {Analysis of the Influence of Static and Dynamic Eccentricity on Back EMF of a Permanent Magnet Synchronous Motor}, year = 2017 }
8. Stempfle, M., Han, Y., Woelfle, J., Troester, N., Roth-Stielow, J.: Influence of Different Switching Frequencies and Modulation Techniques on IPMSM and Inverter Losses Optimizing the Overall Drive Train Efficiency. In: PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–5 (2017).
  - BibTeX
  BibTeX
  @inproceedings{7990931, abstract = {For the optimization of the drive train efficiency, a trade-off between inverter and machine losses is of importance. The inverter's switching frequency and modulation technique influence these losses. In this paper the power loss characteristics of a 70 kW interior permanent magnet synchronous machine are analyzed for different switching frequencies and modulation techniques. Furthermore the machine losses are opposed to the losses of a three phase two-level voltage source inverter. Finally the benefit through the optimization process is shown for several operating points and utilized on a driving cycle. The results of the paper are derived from measurements on a test bench.}, author = {Stempfle, M. and Han, Y. and Woelfle, J. and Troester, N. and Roth-Stielow, J.}, booktitle = {PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = may, pages = {1-5}, title = {Influence of Different Switching Frequencies and Modulation Techniques on IPMSM and Inverter Losses Optimizing the Overall Drive Train Efficiency}, year = 2017 }
9. Schuster, J., Schenkyr, M., Roth-Stielow, J.: A comparison of two methods for sensorless position estimation using the electromagnetic force at an electrically excited synchronous machine. In: 2017 19th European Conference on Power Electronics and Applications (EPE’17 ECCE Europe). p. P.1-P.10 (2017). https://doi.org/10.23919/EPE17ECCEEurope.2017.8099226.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8099226, author = {Schuster, J. and Schenkyr, M. and Roth-Stielow, J.}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)}, doi = {10.23919/EPE17ECCEEurope.2017.8099226}, month = {Sept}, pages = {P.1-P.10}, title = {A comparison of two methods for sensorless position estimation using the electromagnetic force at an electrically excited synchronous machine}, url = {https://doi.org/10.23919/EPE17ECCEEurope.2017.8099226}, year = 2017 }
  Link
  https://doi.org/10.23919/EPE17ECCEEurope.2017.8099226
10. Stempfle, M., Nitzsche, M., Woelfle, J., Zehelein, M., Xu, X., Roth-Stielow, J.: Simple but accurate loss modelling of an IPMSM considering harmonic losses and saturation effects. In: International Electric Machines and Drives Conference (IEMDC) - Miami, USA. IEEE (2017). https://doi.org/10.1109/iemdc.2017.8002071.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Stempfle_2017, author = {Stempfle, Martin and Nitzsche, Maximilian and Woelfle, Julian and Zehelein, Matthias and Xu, Xiaolei and Roth-Stielow, Jorg}, booktitle = {International Electric Machines and Drives Conference ({IEMDC}) - Miami, USA}, doi = {10.1109/iemdc.2017.8002071}, month = may, publisher = {{IEEE}}, title = {Simple but accurate loss modelling of an {IPMSM} considering harmonic losses and saturation effects}, url = {https://doi.org/10.1109%2Fiemdc.2017.8002071}, year = 2017 }
  Link
  https://doi.org/10.1109%2Fiemdc.2017.8002071
11. Wölfle, J., Nitzsche, M., Tröster, N., Ruthardt, J., Stempfle, M., Roth-Stielow, J.: Combination of two variables in a junction temperature control system to elongate the expected lifetime of IGBT-power-modules. In: 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS). pp. 41–47 (2017). https://doi.org/10.1109/PEDS.2017.8289130.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8289130, author = {Wölfle, J. and Nitzsche, M. and Tröster, N. and Ruthardt, J. and Stempfle, M. and Roth-Stielow, J.}, booktitle = {2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS)}, doi = {10.1109/PEDS.2017.8289130}, month = dec, pages = {41-47}, title = {Combination of two variables in a junction temperature control system to elongate the expected lifetime of IGBT-power-modules}, url = {https://doi.org/10.1109/PEDS.2017.8289130}, year = 2017 }
  Link
  https://doi.org/10.1109/PEDS.2017.8289130
12. Troester, N., Bura, D., Woelfle, J., Stempfle, M., Roth-Stielow, J.: Design of a 300 Amps Pulsed Current Source with Slopes up to 27 Amps per Nanosecond for Current Probe Analysis. In: PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–6 (2017).
  - BibTeX
  BibTeX
  @inproceedings{7990694, abstract = {This paper presents the design of a pulsed current source. The topology consists of fast switching silicon carbide semiconductor devices and a low commutation inductance in order to create current impulses with very fast rising and falling slopes up to 27 amps per nanosecond. The current impulses with amplitudes up to 300 amps are typical current forms in power electronics circuits in the commutation path. Therefore, this current form is suitable to analyze current probes designed for measuring fast current slopes during a switching operation in a power electronic circuit.}, author = {Troester, N. and Bura, D. and Woelfle, J. and Stempfle, M. and Roth-Stielow, J.}, booktitle = {PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = may, pages = {1-6}, title = {Design of a 300 Amps Pulsed Current Source with Slopes up to 27 Amps per Nanosecond for Current Probe Analysis}, year = 2017 }
13. Tröster, N., Wölfle, J., Ruthardt, J., Roth-Stielow, J.: High bandwidth current sensor with a low insertion inductance based on the HOKA principle. In: 2017 19th European Conference on Power Electronics and Applications (EPE’17 ECCE Europe). p. P.1-P.9. IEEE (2017). https://doi.org/10.23919/EPE17ECCEEurope.2017.8099003.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{8099003, author = {Tröster, N. and Wölfle, J. and Ruthardt, J. and Roth-Stielow, J.}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)}, doi = {10.23919/EPE17ECCEEurope.2017.8099003}, month = {Sept}, pages = {P.1-P.9}, publisher = {IEEE}, title = {High bandwidth current sensor with a low insertion inductance based on the HOKA principle}, url = {https://doi.org/10.23919/EPE17ECCEEurope.2017.8099003}, year = 2017 }
  Link
  https://doi.org/10.23919/EPE17ECCEEurope.2017.8099003
14. Ruthardt, J., Woelfle, J., Zehelein, M., Roth-Stielow, J.: A New Modulation Technique to Control the Switching Losses for Single Phase Three-Level Active-Neutral-Point-Clamped-Inverters. In: PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–8 (2017).
  - BibTeX
  BibTeX
  @inproceedings{7990878, abstract = {The lifetime of power semiconductor devices significantly depends on the thermal stress they are exposed to. In three-level active-neutral-pointclamped (ANPC) inverters the power losses - and with those the junction temperatures - are very unbalanced using conventional modulation techniques. In this paper a new modulation technique is proposed to spread the power losses across the semiconductor devices. This new modulation technique is a hybridization of the two mainly used pulse-width-modulation (PWM) techniques for ANPC-inverters. Compared with the commonly used PWM techniques the thermal stress the semiconductor devices are exposed to decreases.}, author = {Ruthardt, J. and Woelfle, J. and Zehelein, M. and Roth-Stielow, J.}, booktitle = {PCIM Europe 2017; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = may, pages = {1-8}, title = {A New Modulation Technique to Control the Switching Losses for Single Phase Three-Level Active-Neutral-Point-Clamped-Inverters}, year = 2017 }
2016
1. Moench, S., Costa, M.S., Barner, A., Weimer, J., Holz, R., Schwindt, E., Zehelein, M., Roth-Stielow, J., Kallfass, I.: High thermal conductance AlN power module with hybrid integrated gate drivers and SiC trench MOSFETs for 2 kW single-phase PV inverter. In: 2016 18th European Conference on Power Electronics and Applications (EPE16 ECCE Europe) - Karlsruhe, Germany. IEEE (2016). https://doi.org/10.1109/epe.2016.7695468.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Moench_2016, author = {Moench, Stefan and Costa, Marco Salvatore and Barner, Alexander and Weimer, Julian and Holz, Rainer and Schwindt, Emilia and Zehelein, Matthias and Roth-Stielow, Jorg and Kallfass, Ingmar}, booktitle = {2016 18th European Conference on Power Electronics and Applications ({EPE}16 {ECCE} Europe) - Karlsruhe, Germany}, doi = {10.1109/epe.2016.7695468}, month = sep, publisher = {{IEEE}}, title = {High thermal conductance {AlN} power module with hybrid integrated gate drivers and {SiC} trench {MOSFETs} for 2 {kW} single-phase {PV} inverter}, url = {https://doi.org/10.1109%2Fepe.2016.7695468}, year = 2016 }
  Link
  https://doi.org/10.1109%2Fepe.2016.7695468
2. Stempfle, M., Bintz, S., Wölfle, J., Roth-Stielow, J.: Adaptive closed-loop state control system for a three-level neutral-point-clamped Z-source inverter. IET Electrical Systems in Transportation. 6, 12–19 (2016). https://doi.org/10.1049/iet-est.2015.0010.
  - BibTeX
  - Link
  BibTeX
  @article{7422178, abstract = {Z-source inverter (ZSI) combines the electrical function of a DC/DC converter and a three-phase inverter. This study deals with a three-level neutral-point-clamped (NPC) ZSI which brings an additional electrical potential. The benefit is the lower output current ripple of each phase. Due to the non-linear behaviour of the Z-source control path, designing an accurate and especially a dynamic control can be challenging. This study presents a design of an adaptive control for a three-level NPC ZSI to fulfil the previously mentioned goals. The correct functionality of the control system is underlined with measurements at different operating points. A possible application field for three-level ZSIs are hybrid and electric vehicles.}, author = {Stempfle, M. and Bintz, S. and Wölfle, J. and Roth-Stielow, J.}, doi = {10.1049/iet-est.2015.0010}, issn = {2042-9738}, journal = {IET Electrical Systems in Transportation}, number = 1, pages = {12-19}, title = {Adaptive closed-loop state control system for a three-level neutral-point-clamped Z-source inverter}, url = {https://doi.org/10.1049/iet-est.2015.0010}, volume = 6, year = 2016 }
  Link
  https://doi.org/10.1049/iet-est.2015.0010
3. Wolfle, J., Nitzsche, M., Weimer, J., Stempfle, M., Roth-Stielow, J.: Temperature control system using a hybrid discontinuous modulation technique to improve the lifetime of IGBT power modules. In: 2016 18th European Conference on Power Electronics and Applications (EPE16 ECCE Europe) - Karlsruhe, Germany. IEEE (2016). https://doi.org/10.1109/epe.2016.7695403.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Wolfle_2016, author = {Wolfle, J. and Nitzsche, M. and Weimer, J. and Stempfle, M. and Roth-Stielow, J.}, booktitle = {2016 18th European Conference on Power Electronics and Applications ({EPE}16 {ECCE} Europe) - Karlsruhe, Germany}, doi = {10.1109/epe.2016.7695403}, month = sep, publisher = {IEEE}, title = {Temperature control system using a hybrid discontinuous modulation technique to improve the lifetime of {IGBT} power modules}, url = {https://doi.org/10.1109%2Fepe.2016.7695403}, year = 2016 }
  Link
  https://doi.org/10.1109%2Fepe.2016.7695403
4. Renaudineau, H., Kouro, S., Schaible, K., Zehelein, M.: Flyback-based sub-module PV microinverter. In: 2016 18th European Conference on Power Electronics and Applications (EPE16 ECCE Europe) - Karlsruhe, Germany. pp. 1–9. IEEE (2016). https://doi.org/10.1109/EPE.2016.7695427.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{7695427, abstract = {This paper proposes sub-module integration of a photovoltaic (PV) microinverter. It is proposed to remove the existing junction box and replace the by-pass diodes with individual DC-DC converters connected to a single-phase inverter. Particular attention is given to systems operating under long-term non-uniform conditions, such as snow or dust accumulation. A comparison with a classical two-stage interleaved-flyback microinverter is provided to analyze the performance and to quantify the improvements of the proposed structure.}, author = {Renaudineau, H. and Kouro, S. and Schaible, K. and Zehelein, Matthias}, booktitle = {2016 18th European Conference on Power Electronics and Applications ({EPE}16 {ECCE} Europe) - Karlsruhe, Germany}, doi = {10.1109/EPE.2016.7695427}, month = {Sept}, pages = {1-9}, publisher = {IEEE}, title = {Flyback-based sub-module PV microinverter}, url = {https://ieeexplore.ieee.org/document/7695427/}, year = 2016 }
  Link
  https://ieeexplore.ieee.org/document/7695427/
5. Stempfle, M., Fischer, M., Nitzsche, M., Wolfle, J., Roth-Stielow, J.: Efficiency analysis of three-level NPC and T-Type voltage source inverter for various operation modes optimizing the overall drive train efficiency by an operating mode selection. In: 2016 18th European Conference on Power Electronics and Applications (EPE16 ECCE Europe) - Karlsruhe, Germany. IEEE (2016). https://doi.org/10.1109/epe.2016.7695368.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Stempfle_2016, author = {Stempfle, M. and Fischer, M. and Nitzsche, M. and Wolfle, J. and Roth-Stielow, J.}, booktitle = {2016 18th European Conference on Power Electronics and Applications ({EPE}16 {ECCE} Europe) - Karlsruhe, Germany}, doi = {10.1109/epe.2016.7695368}, month = sep, publisher = {IEEE}, title = {Efficiency analysis of three-level NPC and T-Type voltage source inverter for various operation modes optimizing the overall drive train efficiency by an operating mode selection}, url = {https://doi.org/10.1109%2Fepe.2016.7695368}, year = 2016 }
  Link
  https://doi.org/10.1109%2Fepe.2016.7695368
6. Troester, N., Beilharz, D., Roth-Stielow, J.: A novel algorithm for position estimation in coreless current measurement applications. In: 2016 18th European Conference on Power Electronics and Applications (EPE16 ECCE Europe) - Karlsruhe, Germany. pp. 1–9 (2016). https://doi.org/10.1109/EPE.2016.7695598.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{7695598, abstract = {This paper presents a novel algorithm to measure current without a flux concentrating ferromagnetic core enclosing the current carrying conductor. First the algorithm is presented; the algorithm requires three magnetic field sensors around the circular conductor. The information about the magnetic field is used to estimate the position of the conductor and to calculate the current to be measured. Second measurements are presented to verify the concept.}, author = {Troester, N. and Beilharz, D. and Roth-Stielow, J.}, booktitle = {2016 18th European Conference on Power Electronics and Applications ({EPE}16 {ECCE} Europe) - Karlsruhe, Germany}, doi = {10.1109/EPE.2016.7695598}, month = {Sept}, pages = {1-9}, title = {A novel algorithm for position estimation in coreless current measurement applications}, url = {https://doi.org/10.1109/EPE.2016.7695598}, year = 2016 }
  Link
  https://doi.org/10.1109/EPE.2016.7695598
7. Blank, F., Röser, T., Zehelein, M., Roth-Stielow, J.: Minimierung der Verluste im Antriebssystem mit Hilfe numerisch optimierter Trajektorien. In: gGmbH, S.P. (ed.) 2016 Fortschritte in der Antriebs- und Automatisierungstechnik (FAA Kongress) - Stuttgart. Stuttgarter Produktionsakademie gGmbH (2016).
  - BibTeX
  BibTeX
  @inproceedings{blank2016minimierung, author = {Blank, Frederic and Röser, Tobias and Zehelein, Matthias and Roth-Stielow, Jörg}, booktitle = {2016 Fortschritte in der Antriebs- und Automatisierungstechnik (FAA Kongress) - Stuttgart}, editor = {gGmbH, Stuttgarter Produktionsakademie}, publisher = {Stuttgarter Produktionsakademie gGmbH }, title = {Minimierung der Verluste im Antriebssystem mit Hilfe numerisch optimierter Trajektorien}, year = 2016 }
8. Zehelein, M., Moench, S., Costa, M.S., Barner, A., Roth-Stielow, J.: Control strategy for a parallel active buffer circuit in a single-phase-inverter. In: 2016 18th European Conference on Power Electronics and Applications (EPE’16 ECCE Europe). pp. 1–10 (2016). https://doi.org/10.1109/EPE.2016.7695359.
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  BibTeX
  @inproceedings{7695359, abstract = {This paper presents a control strategy for a single-phase photovoltaic inverter, using a parallel active buffer circuit. The aim is to reduce the volume demand of the necessary capacitance for filtering the twice line frequency pulsating power. The pulsating power is stored in an additional buffer capacitor, which is decoupled from the input voltage by an active buffer circuit. Therefore a high voltage swing is possible. The control concept allows an independent operation of the parallel buffer circuit from the inverter circuit.}, author = {Zehelein, M. and Moench, S. and Costa, M. S. and Barner, A. and Roth-Stielow, J.}, booktitle = {2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)}, doi = {10.1109/EPE.2016.7695359}, month = {Sept}, pages = {1-10}, title = {Control strategy for a parallel active buffer circuit in a single-phase-inverter}, url = {https://doi.org/10.1109/EPE.2016.7695359}, year = 2016 }
  Link
  https://doi.org/10.1109/EPE.2016.7695359
2015
1. Wolfle, J., Roth-Stielow, J., Koller, O., Bertsche, B.: Control Method to Increase the Reliability of IGBT Power Modules Validated on a Three Phase Inverter. In: 2015 IEEE Vehicle Power and Propulsion Conference (VPPC). pp. 1–6 (2015). https://doi.org/10.1109/VPPC.2015.7352918.
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  @inproceedings{7352918, abstract = {This paper presents a junction temperature controller which increases the reliability of IGBT power modules in power electronic applications without affecting the demanded output power. Power electronic applications have to deal with varying load conditions. These varying load conditions lead to temperature swings which lead to mechanical stress of common IGBT power modules. At low load conditions the switching losses are increased by increasing the switching frequency. This leads to reduced temperature swings resulting in a higher reliability. The functionality of the control system is verified on a three phase two level inverter connected to a passive load.}, author = {Wolfle, J. and Roth-Stielow, J. and Koller, O. and Bertsche, B.}, booktitle = {2015 IEEE Vehicle Power and Propulsion Conference (VPPC)}, doi = {10.1109/VPPC.2015.7352918}, month = oct, pages = {1-6}, title = {Control Method to Increase the Reliability of IGBT Power Modules Validated on a Three Phase Inverter}, url = {https://doi.org/10.1109/VPPC.2015.7352918}, year = 2015 }
  Link
  https://doi.org/10.1109/VPPC.2015.7352918
2. Lehmann, O., Nguyen, N.K., Schuster, J., Roth-Stielow, J.: Optimized sensorless DTC of PMSM for electric vehicles by using a switching command synchronized evaluation at standstill and low speed. In: 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia). pp. 1386–1393 (2015). https://doi.org/10.1109/ICPE.2015.7167960.
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  BibTeX
  @inproceedings{7167960, abstract = {The “direct-torque-control” (DTC) is an alternative to the commonly used “field oriented control” (FOC) for the control of a PMSM. One advantage of the DTC is its inherent ability of sensorless control. However at standstill and low speed range the back-EMF based model has problems to detect the rotor position. The switching command synchronized evaluation (SCSE) calculates the rotor position using the current change during active voltage vectors. Realizations of the SCSE using the FOC are known, but the combination of the SCSE with a discrete-time DTC avoids problems with switching disturbances. The capability of the presented optimized DTC is proved with measurements on a test bench.}, author = {Lehmann, O. and Nguyen, N. K. and Schuster, J. and Roth-Stielow, J.}, booktitle = {2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)}, doi = {10.1109/ICPE.2015.7167960}, issn = {2150-6078}, month = {June}, pages = {1386-1393}, title = {Optimized sensorless DTC of PMSM for electric vehicles by using a switching command synchronized evaluation at standstill and low speed}, url = {https://doi.org/10.1109/ICPE.2015.7167960}, year = 2015 }
  Link
  https://doi.org/10.1109/ICPE.2015.7167960
3. Stempfle, M., Fischer, M., Roth-Stielow, J.: Loss modelling to optimize the overall drive train efficiency. In: 2015 17th European Conference on Power Electronics and Applications (EPE’15 ECCE-Europe). pp. 1–10 (2015). https://doi.org/10.1109/EPE.2015.7309147.
  - BibTeX
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  BibTeX
  @inproceedings{7309147, abstract = {For drive train efficiency estimation, loss models of the battery, an optional DC/DC converter, an inverter and the electrical machine are presented. Harmonic iron losses of the machine caused by current ripple are considered in order to evaluate various modulation strategies and switching frequencies of the inverter. Battery voltage optimizations are analysed regarding the overall drive train efficiency as well as the influence on different DC/DC converters.}, author = {Stempfle, M. and Fischer, M. and Roth-Stielow, J.}, booktitle = {2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)}, doi = {10.1109/EPE.2015.7309147}, month = {Sept}, pages = {1-10}, title = {Loss modelling to optimize the overall drive train efficiency}, url = {https://doi.org/10.1109/EPE.2015.7309147}, year = 2015 }
  Link
  https://doi.org/10.1109/EPE.2015.7309147
4. Wolfle, J., Lehmann, O., Roth-Stielow, J.: A novel control method to improve the reliability of traction inverters for permanent magnet synchronous machines. In: 2015 IEEE 11th International Conference on Power Electronics and Drive Systems. Institute of Electrical and Electronics Engineers (IEEE) (2015). https://doi.org/10.1109/peds.2015.7203573.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Wolfle_2015, author = {Wolfle, Julian and Lehmann, Oliver and Roth-Stielow, Jorg}, booktitle = {2015 IEEE 11th International Conference on Power Electronics and Drive Systems}, doi = {10.1109/peds.2015.7203573}, month = jun, publisher = {Institute of Electrical and Electronics Engineers ({IEEE})}, title = {A novel control method to improve the reliability of traction inverters for permanent magnet synchronous machines}, url = {https://doi.org/10.1109%2Fpeds.2015.7203573}, year = 2015 }
  Link
  https://doi.org/10.1109%2Fpeds.2015.7203573
5. Lehmann, O., Heintze, M., Nemec, C., Roth-Stielow, J.: Using a multiphase interleaved-switched inverter as power-hardware-in-the-loop machine emulator to test sensorless control techniques. In: Proceedings of PCIM Europe 2015; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. pp. 1–8 (2015).
  - BibTeX
  BibTeX
  @inproceedings{7149208, abstract = {This paper describes an optimized hardware setup for a power-hardware-in-the-loop machine emulator which allows the emulation of the magnetic anisotropy e.g. of a permanent magnet synchronous machine. This gives the opportunity to test various control systems which are beyond the common current and speed control, like sensorless control methods, on a machine emulator. Additionally, sophisticated test scenarios such as a step-shaped speed change, which hardly can be done on a test bench are able to be performed on a machine emulator. To obtain best results, several optimizations for an emulator setup are described. The performance of the presented emulator is verified by measurements conducted with an inverter-under-test, that uses the INFORM method and an EMF-model to track the rotor position sensorless.}, author = {Lehmann, O. and Heintze, M. and Nemec, C. and Roth-Stielow, J.}, booktitle = {Proceedings of PCIM Europe 2015; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, month = may, pages = {1-8}, title = {Using a multiphase interleaved-switched inverter as power-hardware-in-the-loop machine emulator to test sensorless control techniques}, year = 2015 }
6. Nguyen, Q.K., Schuster, J., Roth-Stielow, J.: Energy optimal control of an electrically excited synchronous motor used as traction drive. In: 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia). pp. 2789–2795 (2015). https://doi.org/10.1109/ICPE.2015.7168165.
  - BibTeX
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  BibTeX
  @inproceedings{7168165, abstract = {Due to the high power density the interior permanent magnet synchronous motors (IPMSM) are widely used as traction drives. However this machine principle has the disadvantage of low energy efficiency in high speed range. An alternative machine principle is the electrically excited synchronous motor (EESM). It enables an additional degree of freedom to control the motor torque efficiently. In this paper an energy efficient control is implemented for an EESM which is designed for the traction application.}, author = {Nguyen, Q. K. and Schuster, J. and Roth-Stielow, J.}, booktitle = {2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)}, doi = {10.1109/ICPE.2015.7168165}, issn = {2150-6078}, month = {June}, pages = {2789-2795}, title = {Energy optimal control of an electrically excited synchronous motor used as traction drive}, url = {https://doi.org/10.1109/ICPE.2015.7168165}, year = 2015 }
  Link
  https://doi.org/10.1109/ICPE.2015.7168165
7. Wölfle, J.F., Roth-Stielow, J.: A hybrid discontinuous modulation technique to influence the switching losses of three phase inverters. In: 2015 17th European Conference on Power Electronics and Applications (EPE’15 ECCE-Europe). pp. 1–10 (2015). https://doi.org/10.1109/EPE.2015.7309145.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{7309145, abstract = {This paper presents a modulation technique, which combines the known space-vector-pulse-width-modulation (SVPWM) and the discontinuous-pulse-width-modulation (DPWM). This enables the possibility to set the switching losses freely within a certain border band. A possible area of application is the reliability of IGBT-inverters modules, where junction temperature swings can be reduced by influencing the power losses. The functionality is underlined by the analytical derivation of the switching and conduction mean power loss equations which are verified by measurements in certain operation points.}, author = {Wölfle, J. F. and Roth-Stielow, J.}, booktitle = {2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)}, doi = {10.1109/EPE.2015.7309145}, month = {Sept}, pages = {1-10}, title = {A hybrid discontinuous modulation technique to influence the switching losses of three phase inverters}, url = {https://doi.org/10.1109/EPE.2015.7309145}, year = 2015 }
  Link
  https://doi.org/10.1109/EPE.2015.7309145
8. Blank, F., Röser, T., Roth-Stielow, J.: Drive system loss minimizing trajectories using constrained non-linear optimization. In: 2015 IEEE 11th International Conference on Power Electronics and Drive Systems. pp. 986–991 (2015). https://doi.org/10.1109/PEDS.2015.7203394.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{7203394, abstract = {In various industry applications position controlled electrical drive systems fulfill rest-to-rest motions. The control systems reference position is given by trajectories. As the trajectories have an influence on the energy losses of the components, an optimized trajectory leads to a loss minimization of the system. Therefore, by using the loss models of the mechanical components, the electrical motor and power electronics developed before, a new trajectory is calculated. It is implemented with a constrained non-linear optimization algorithm. The approach is applied for a linear drive system under various conditions and the results are validated in measurements. It is shown that this minimizes the total losses of the system which can save around 5 % of energy, compared to other trajectories.}, author = {Blank, F. and Röser, T. and Roth-Stielow, J.}, booktitle = {2015 IEEE 11th International Conference on Power Electronics and Drive Systems}, doi = {10.1109/PEDS.2015.7203394}, issn = {2164-5256}, month = {June}, pages = {986-991}, title = {Drive system loss minimizing trajectories using constrained non-linear optimization}, url = {https://doi.org/10.1109/PEDS.2015.7203394}, year = 2015 }
  Link
  https://doi.org/10.1109/PEDS.2015.7203394
2014
1. Schuster, J., Stempfle, M.: Leistungselektronische Topologien und Betriebsverfahren für die fremderregte Synchronmaschine. Beitrag zum Cluster Seminar, ECPE Nürnberg (2014).
  - BibTeX
  BibTeX
  @proceedings{schuster2014leistungselektronische, author = {Schuster, Johannes and Stempfle, Martin}, eventtitle = {ECPE, Cluster Seminar 2014 - Nürnberg}, language = {Deutsch}, publisher = {Beitrag zum Cluster Seminar, ECPE Nürnberg}, title = {Leistungselektronische Topologien und Betriebsverfahren für die fremderregte Synchronmaschine }, year = 2014 }
2. Nguyen, Q.K., Petrich, M., Roth-Stielow, J.: Implementation of the MTPA and MTPV control with online parameter identification for a high speed IPMSM used as traction drive. In: 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA). pp. 318–323 (2014). https://doi.org/10.1109/IPEC.2014.6869600.
  - BibTeX
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  BibTeX
  @inproceedings{6869600, abstract = {In this paper, the problem of how to implement the MTPA/MTPV control for an energy efficient operation of a high speed Interior Permanent Magnet Synchronous Motor (IPMSM) used as traction drive is considered. This control method depends on the inductances Ld, Lq, the flux linkage ΨPM and the stator resistance Rs which might vary during operation. The parameter variation causes miscalculation of the set point currents Id and Iq for the inner current control system and thus a wrong torque will be set. Consequently the IPMSM will not be operating in the optimal operation point which yields to a reduction of the total energy efficiency and the performance. As a consequence, this paper proposes the implementation of the the Recursive Least Square Estimation (RLS) for a high speed and high performance IPMSM. With this online identification method the variable parameters are estimated and adapted to the MTPA and MTPV control strategy.}, author = {Nguyen, Q. K. and Petrich, M. and Roth-Stielow, J.}, booktitle = {2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)}, doi = {10.1109/IPEC.2014.6869600}, issn = {2150-6078}, month = may, pages = {318-323}, title = {Implementation of the MTPA and MTPV control with online parameter identification for a high speed IPMSM used as traction drive}, url = {https://doi.org/10.1109/IPEC.2014.6869600}, year = 2014 }
  Link
  https://doi.org/10.1109/IPEC.2014.6869600
3. Lehmann, O., Schuster, J., Roth-Stielow, J.: Sensorless Control Techniques as Redundancy for the Control of Permanent Magnet Synchronous Machines in Electric Vehicles. In: 2014 IEEE Vehicle Power and Propulsion Conference (VPPC). pp. 1–6 (2014). https://doi.org/10.1109/VPPC.2014.7007127.
  - BibTeX
  BibTeX
  @inproceedings{7007127, abstract = {For the field oriented current control of permanent magnet synchronous machines in electric vehicles the knowledge of the rotor position is necessary. The position information is typically measured with a resolver. Therefore a failure of this resolver is critical. This paper describes several possibilities to use sensorless control techniques as redundancy to a resolver with the focus on the requirements for the use in electric vehicles.}, author = {Lehmann, O. and Schuster, J. and Roth-Stielow, J.}, booktitle = {2014 IEEE Vehicle Power and Propulsion Conference (VPPC)}, doi = {10.1109/VPPC.2014.7007127}, issn = {1938-8756}, month = oct, pages = {1-6}, title = {Sensorless Control Techniques as Redundancy for the Control of Permanent Magnet Synchronous Machines in Electric Vehicles}, year = 2014 }
4. Nguyen, Q.K., Roth-Stielow, J.: Analysis and Modelling of the Losses for the Electrical Drive System of an Electric Vehicle. In: 2014 IEEE Vehicle Power and Propulsion Conference (VPPC). pp. 1–6 (2014). https://doi.org/10.1109/VPPC.2014.7007018.
  - BibTeX
  BibTeX
  @inproceedings{7007018, abstract = {In this paper the losses of the electrical drive system for electrical vehicles (EV) are investigated and modelled. For this, the individual losses of the two main components, the voltage source inverter (VSI) and the Interior Permanent Magnet Synchronous Machine (IPMSM), are analysed and modelled. This model considers the parameter variation and the dependency on the operating point of the IPMSM. Using multiple linear regression, an approximation equation is found which describes accurately the total loss of the VSI. Hence it enables to determine the losses accurately by simulation.}, author = {Nguyen, Q. K. and Roth-Stielow, J.}, booktitle = {2014 IEEE Vehicle Power and Propulsion Conference (VPPC)}, doi = {10.1109/VPPC.2014.7007018}, issn = {1938-8756}, month = oct, pages = {1-6}, title = {Analysis and Modelling of the Losses for the Electrical Drive System of an Electric Vehicle}, year = 2014 }
5. Schuster, J., Lehmann, O., Roth-Stielow, J.: Geberfreie Positionserfassung einer fremderregten Synchronmaschine durch eine Auswertung der Schwankungsbreite des Erregerstroms. In: 2014 SPS/IPC/Drives - Nürnberg. pp. 395–402. Apprimus Verlag, Aachen (2014).
  - BibTeX
  BibTeX
  @inproceedings{schuster2014geberfreie, author = {Schuster, Johannes and Lehmann, Oliver and Roth-Stielow, Jörg}, booktitle = {2014 SPS/IPC/Drives - Nürnberg}, isbn = {978-3-86359-272-1}, pages = {395 - 402}, publisher = {Apprimus Verlag, Aachen}, title = {Geberfreie Positionserfassung einer fremderregten Synchronmaschine durch eine Auswertung der Schwankungsbreite des Erregerstroms}, year = 2014 }
6. Blank, F., Roth-Stielow, J.: Development and verification of energy-accurate simulation models for permanent magnet synchronous motors in automation systems. In: 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA). pp. 264–269 (2014). https://doi.org/10.1109/IPEC.2014.6869591.
  - BibTeX
  BibTeX
  @inproceedings{6869591, abstract = {In order to evaluate the energy efficiency of electrical drive systems for automation, simulations are made. For this purpose energy-accurate models are needed, which include all significant losses. The development and verification of an optimized simulation model for a permanent magnet synchronous motor with a nominal power of 1 kW is presented in this paper, using measurements in different operating points. It is not necessary to know the design data of the motor or finite-element-models for this. Influences are analyzed and the model is verified using measurements and statistical methods. With the help of the presented method, simulation models can be developed to compare the energy efficiency of different motors application dependent and therefore save energy.}, author = {Blank, F. and Roth-Stielow, J.}, booktitle = {2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)}, doi = {10.1109/IPEC.2014.6869591}, issn = {2150-6078}, month = may, pages = {264-269}, title = {Development and verification of energy-accurate simulation models for permanent magnet synchronous motors in automation systems}, year = 2014 }
7. Lehmann, O., Zehelein, M., Schuster, J., Roth-Stielow, J.: A comparison of different sensorless position acquisition methods at low speeds for a permanent magnet synchronous machine in vehicle applications. In: 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA). IEEE (2014). https://doi.org/10.1109/ipec.2014.6870125.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{IPEC_Lehmann_2014, author = {Lehmann, Oliver and Zehelein, Matthias and Schuster, Johannes and Roth-Stielow, Jorg}, booktitle = {2014 International Power Electronics Conference ({IPEC}-Hiroshima 2014 - {ECCE} {ASIA})}, doi = {10.1109/ipec.2014.6870125}, month = may, publisher = {IEEE}, title = {A comparison of different sensorless position acquisition methods at low speeds for a permanent magnet synchronous machine in vehicle applications}, url = {https://doi.org/10.1109%2Fipec.2014.6870125}, year = 2014 }
  Link
  https://doi.org/10.1109%2Fipec.2014.6870125
2013
1. Nemec, C., Lehmann, O., Heintze, M., Roth-Stielow, J.: Optimal inductor setup for a power-hardware-in-the-loop machine emulator. In: 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS). pp. 364–369 (2013). https://doi.org/10.1109/PEDS.2013.6527045.
  - BibTeX
  BibTeX
  @inproceedings{6527045, abstract = {This paper presents investigations on the setup of the power electronic stage within a power-hardware-in-the-loop machine emulator. The emulator draws currents from a drive inverter, equivalent to a real electrical machine, by a setup of a multi-phase interleaved-switched inverter coupled by inductors. The choice of these inductors is essential for the functionality of the emulator and thus is investigated. The influences of the inductor setup on the emulator's output currents slew rate as well as their ripple are worked out with respect to the desired application. Based on these results, an optimal inductor setup consisting of magnetically coupled inductors is extracted by using a control block diagram of the topology. As a result, the necessary control of the interleaved-switched inverter is unburdened.}, author = {Nemec, C. and Lehmann, O. and Heintze, M. and Roth-Stielow, J.}, booktitle = {2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS)}, doi = {10.1109/PEDS.2013.6527045}, issn = {2164-5256}, month = {April}, pages = {364-369}, title = {Optimal inductor setup for a power-hardware-in-the-loop machine emulator}, year = 2013 }
2. Nemec, C., Wolfle, J., Nitzsche, M., Roth-Stielow, J.: Handling of disturbance variables within a multi-phase interleaved-switched inverter by a discrete-time decoupling network. In: 15th European Conference on Power Electronics and Applications (EPE) - Lille, France. IEEE (2013). https://doi.org/10.1109/epe.2013.6634464.
  - BibTeX
  - Link
  BibTeX
  @inproceedings{Nemec_2013, author = {Nemec, Christian and Wolfle, Julian and Nitzsche, Maximilian and Roth-Stielow, Jorg}, booktitle = {15th European Conference on Power Electronics and Applications (EPE) - Lille, France}, doi = {10.1109/epe.2013.6634464}, month = sep, publisher = {IEEE}, title = {Handling of disturbance variables within a multi-phase interleaved-switched inverter by a discrete-time decoupling network}, url = {https://doi.org/10.1109%2Fepe.2013.6634464}, year = 2013 }
  Link
  https://doi.org/10.1109%2Fepe.2013.6634464

Publikationen

Veröffentlichungen am Institut für Leistungselektronik und Elektrische Antriebe

2020

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2019

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2018

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