Wednesday morning, 26 June 2019
Chairperson: Prof. Yongdong Li, Tsinghua University, China
Silicon Carbide Goes Mass Production: the Dawn of a New Era for Semiconductors in EV
The intrinsic properties of Silicon Carbide (SiC) allow manufacturing much more efficient power devices. This presentation discusses how the SiC technology has reached a maturity suitable for a broad deployment in Electric Vehicles, and explores its benefits in the system.
Laurent Beaurenaut received his master degree in electrical engineering in 1999 from the Ecole Nationale Superieure d'Electronique (ENSEEIHT Toulouse, France). He has worked for Infineon Technologies since 2000. As an application engineer, he supported several product families, such as automotive microcontrollers for engine management systems and automotive and industrial sensors. Since 2010, he is working as Principal Engineer for Electric Drive Train and heads the Automotive SiC Business Development group.
High speed electrical machines for vehicle applications
Applications for vehicles of high speed electrical machines will be presented. Characteristics, structures and control issues of such high speed machines will be introduced. Challenges for the related R&D will be high-lighted.
Jianxin Shen received the B.Eng. and M.Sc. degrees from Xi'an Jiaotong University, and PhD degree from Zhejiang, in 1991, 1994 and 1997, respectively. He worked at Nanyang Technological University (1997-1999), Sheffield University (1999-2002), and IMRA Europe SAS, UK Research Centre (2002-2004). Since 2004 he has been a professor with Zhejiang University. He has authored 250+ technical papers with 8 paper awards, and holds 40+ patents. He is an IET fellow, IEEE senior member, VTS distinguished lecturer and IAS member-at-large. His main research interests include topologies, control and applications of permanent magnet machines and drives, and renewable energies.
Analysis and Suppression of Common Mode Voltage for Motor Drive in EV
Common-mode voltage (CMV) which would bring common mode electromagnetic interference (EMI) and damage to motor bearings is an important performance index in electric drive system. With the application of SiC devices, this problem will become more serious because of the faster switching speed. However, the impact of high switching speed and high switching frequency on common-mode voltage is still ambiguous. Theoretical analyses are conducted by FFT to study the influence of high switching speed and high switching frequency on CMV and then the experimental verifications are carried out. The PWM strategy which can suppress the CMV is introduced. CMV can also be suppressed by hardware methods. The experimental results show that either has the ability to restrain CMV. But, the best inhibition effect can be achieved by combining both.
Haifeng Lu received the B.S. and M.S. degrees in electrical engineering from Southeast University, Nanjing, China, in 1998 and 2001, respectively, and the Ph.D. degree in electrical engineering from Tsinghua University, Beijing, China, in 2005. He is currently an Associate Professor in the Department of Electrical Engineering, Tsinghua University. His currentmajorresearch interests include the application of SiC and motor drives in electricalvehicles.Dr. Lu is the Professional Committee Member of electrical vehicle in the ChinaElectrotechnical Society. He is also the Member of the PELS and electric vehicle branch of China Automotive Engineering Institute.
Key Technologies of Multi-Port Power Conversion Systems for the More Electric Aircraft
In the framework of the More Electric Aircraft (MEA), weight reduction and energy efficiency constitute the key figures. In addition to these requirements, the safety and the continuity of operation is of critical importance. These sets of desired feature are in disagreement, because the redundancy needed to guarantee the safety of operation implies necessarily in additional weight.
Several key technologies for the electrical power distribution systems will be described and discussed, including multi-port solid state transformers, multi-winding generator drives, solid state circuit breakers and so on. These technologies allows for a ring distribution of the electrical power whereas the galvanic isolation is still kept.
Dr. Chunyang Gu was born in Heilongjiang, China, in 1988. She received the B.Sc. degree from Harbin Institute of Technology, Harbin, China, in 2010, and the Ph.D. degree from Tsinghua University, Beijing, China, in 2015, both in electrical engineering. In 2015, she went to the University of Nottingham, UK, where she was a Postdoc Research Fellow in Power Electronics, Machines and Control (PEMC) Research Group. Since 2017, she has been an Assistant Professor in Department of Electrical and PEMC Research Group, University of Nottingham Ningbo China. Her research interests include power electronics for transportation electrification, renewable energy and grid applications, e.g. solid-state transformer, solid-state circuit breaker, multi-level converter topologies and control, application of wide-band-gap semiconductor devices, power electronics in EV, railway, marine and MEA.