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Comparative Evaluation of 800V DC-Link Three-Phase Two/Three-Level SiC Inverter Concepts for Next-Generation Variable Speed Drives
(2020)2020 23rd International Conference on Electrical Machines and Systems (ICEMS)The adoption of wide band-gap (WBG) semiconductors is gaining momentum, particularly in industries where high efficiency and/or extreme power density are major concerns, e.g. electric transportation and aerospace. In order to fully leverage the advantages of WBG devices, identifying the converter topologies best exploiting their superior performance is of utmost importance. Hence, this paper analyzes and compares 2-level and 3-level ...Conference Paper -
Analysis of Low Frequency Grid Current Harmonics Caused by Load Power Pulsation in a 3-Phase PFC Rectifier
(2020)2019 2nd International Conference on Smart Grid and Renewable Energy (SGRE)Conference Paper -
Next-Generation SiC/GaN Three-Phase Variable-Speed Drive Inverter Concepts
(2021)PCIM Europe digital days 2021Variable-speed drive (VSD) systems should feature high power density and low installation costs, offer wide input and/or output voltage/motor speed ranges and ensure low EMI without requiring shielded motor cables. Accordingly, next-generation high-switching-frequency SiC/GaN PWM inverters should integrate LC output filters and generate continuous output voltages to prevent conducted or radiated EMI, reflections on long motor cables, ...Conference Paper -
Optimal Synergetic Control of a Three-Phase Two-Stage Ultra-Wide Output Voltage Range EV Battery Charger Employing a Novel Hybrid Quantum Series Resonant DC/DC Converter
(2020)2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)A wide output voltage range (200 − 1000V DC ) isolated two-stage three-phase EV charger is proposed. The system employs a boost-type two-level PFC rectifier front-end and the subsequent novel Hybrid Quantum Series Resonant DC/DC Converter (H-QSRC) output stage, which is left either unregulated with constant voltage transfer ratio or is used to emulate a buck or boost behavior. For reducing the H-QSRC voltage transfer ratio discretization, ...Conference Paper -
Concept of a Novel Bearingless Three-Pole Motor for Two-Sided Driven Applications
(2021)2021 24th International Conference on Electrical Machines and Systems (ICEMS)This paper presents a novel bearingless three-pole motor for two-sided driven applications, i. e., two motors levitating and rotating a common rotor without any mechanical contact. When operating in chemically demanding environments its advantages are highly promising: the bearingless technology allows friction- and wear-free motion, unlimited lifetime and a hermetically sealed encapsulation of the rotor, while the novel motor convinces ...Conference Paper -
Optimal Level Number and Performance Evaluation of GaN/Si Multi-Level Flying Capacitor Inverter for Variable Speed Drive Systems
(2022)2022 25th International Conference on Electrical Machines and Systems (ICEMS)This paper analyzes the optimal number of voltage levels concerning power density for a motor-integrated Multi-Level Flying Capacitor inverter (ML FCi) with 800 V DC-link driving a 7.5 kW Permanent Magnet Synchronous Motor (PMSM). The analysis is performed for an ML FCi, as it enables high efficiency and power density required for motor integration on the one hand and decreases the output filter volume with increasing output voltage level ...Conference Paper -
Ultra-high Power Density Server Supplies Employing GaN Power Semiconductors and PCB-Integrated Magnetics
(2020)ETG-Fachbericht ~ CIPS 2020: 11th International Conference on Integrated Power Electronics Systems, ProceedingsThe trend towards higher computation power per server rack has lead to an increased interest in high density server power supplies with high efficiency and low cost. This paper analyzes how the specific features of planar magnetics as transformers and inductors can be best utilized in combination with GaN power semiconductors to reach unprecedented system performance both for power supplies with 12V and with 48V output voltage. Based on ...Conference Paper -
Full-SiC Integrated Power Module Based on Planar Packaging Technology for High Efficiency Power Converters in Aircraft Applications
(2020)ETG-Fachbericht ~ CIPS 2020: 11th International Conference on Integrated Power Electronics Systems, ProceedingsCompact, light-weight, efficient and reliable power converters are fundamental for the future of More Electrical Aircraft (MEA). Core elements supporting the electrification of the aerospace industry are power modules (PMs) employing exclusively SiC MOSFETs. In order to fully exploit the high switching speeds enabled by SiC, and to address the challenges arising from the parallelization of power devices, novel PM concepts must be investigated. ...Conference Paper -
Eddy-Current Linear-Rotary Position Sensor for an Implantable Total Artificial Heart
(2022)2022 25th International Conference on Electrical Machines and Systems (ICEMS)This paper presents an eddy-current linear-rotary position sensor for ShuttlePump, an implantable total artificial heart based on a linear-rotary actuator. The sensor is obtained by extending a commercially available rotary position sensor with appropriate data processing by also capturing the information about the linear position. In fact, with changing linear distance of the target, the amplitudes of the sine and cosine sensor outputs ...Conference Paper -
Comparative Evaluation of ARCP and Three-Level TCM Soft-Switching Bridge-Legs for High-Frequency SiC Converter Systems
(2022)2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)Soft-switching bridge-legs facilitate high-efficiency three-phase PV inverters or PFC rectifiers. By extending a half-bridge with a resonant auxiliary circuit, including two additional transistors, zero-voltage switching (ZVS) of the main transistors can be realized (Active Resonant Commutated Pole, ARCP). Alternatively, a similar T-type bridge-leg structure achieves ZVS by operating the output filter inductor with a sufficiently high ...Conference Paper