Chinese Journal of Electrical Engineering ›› 2022, Vol. 8 ›› Issue (4): 52-60.doi: 10.23919/CJEE.2022.000038

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Hybrid Common-mode EMI Filter Design for Electric Vehicle Traction Inverters

Yongjie Han1, Zhihong Wu1, Deliang Wu2,*   

  1. 1. School of Automotive Studies, Tongji University, Shanghai 200092, China;
    2. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
  • Received:2022-04-16 Revised:2022-08-08 Accepted:2022-09-07 Online:2022-12-25 Published:2023-01-13
  • Contact: * E-mail: wudeliang@shu.edu.cn
  • About author:Yongjie Han received the M.S. degrees in Power Engineering and Engineering Thermo-physics from Tsinghua University, Beijing, China, in 2007. He Joined SAIC Motor Technical Center, Shanghai, China in 2007, where he was involved in research and development of EV and PHEV powertrain system, mainly focused on power electronics, function safety, electromagnetic compatibility, etc. In 2017, he joined Tongji University as a Ph.D. student. His current research interest is power electronics technology for new energy vehicles.
    Zhihong Wu received the B.S. and M.S. degrees in Electrical Engineering from Zhejiang University, Hangzhou, China, in 1982 and 1988, respectively, and a Ph.D. degree from Technical University Berlin, Berlin, Germany, in 1999. He is currently a Professor at the School of Automotive Studies, Tongji University; Deputy Dean of the Sino-German College for Postgraduate Studies, Tongji University; Infineon-Endowed Chair Professor for Embedded Systems; Director of Infineon-Tongji Automotive Electronics Joint Laboratory; and Director of Tongji-Vector Automotive Technology Joint Laboratory. His research interests include electrical drive systems of new energy vehicles, perception algorithms for autonomous vehicles, and functional safety. Prof. Wu is a member of the board of directors of Power Converter and Intelligent Motion (PCIM) Asia, a member of the International Science Committee of European Power Electronics (EPE), and vice chairman of the Shanghai Power Supply Association.
    Deliang Wu received his B.E. and Ph.D. degrees in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in 2010 and 2015, respectively. From 2016 to 2018, he was a Senior Research Engineer at Huawei Technologies Co., Ltd. In 2018, he joined Arizona State University as a post-doctoral scholar. In 2020, he joined Shanghai University and is currently an Associate Professor. His research interests include WBG power device applications in high-efficiency and high-power-density converters.

Abstract: A feedforward current-sense current-compensation (CSCC) active EMI filter (AEF) for the direct current-side common-mode (CM) electromagnetic interference (EMI) suppression of high-power electric vehicle traction inverters is analyzed and designed. A detailed design of the components with formulas is provided based on an analysis of the CSCC AEF, including the CSCC AEF topology and its implementation. The feedforward active filter stage was implemented using a simple current transformer and a small circuit board. Only a small passive filter with a high resonant frequency is required for high-frequency noise attenuation. The filter's effectiveness was validated using the simulation results and experimental measurements.

Key words: Active EMI filter, hybrid EMI filter, common-mode EMI, traction inverter