Soft Switching Inverters with Wide-Bandgap Devices

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Soft Switching Inverters with Wide-Bandgap Devices
Tuesday, February 20, 2018 - 4:30pm to 5:30pm
Packard 204
Prof. Mark Dehong Xu - Director of Power Electronics Institute at the National Engineering Research Center of Applied Power Electronics - Zhejiang University China
Abstract / Description: 

Soft switching has been successfully applied in switching supplies, single-phase inverter for induction heating etc. However, applications of soft switching to three-phase inverters or converters are not so common up to now. Three-phase converters/inverters are widely used in Data Center, UPS, fast EV chargers, PV/Wind power inverter, and drives. In this presentation soft switching inverters with Zero-Voltage-Switching SVM scheme(ZVS-SVM) is introduced. The ZVS-SVM can be used either three-Phase AC/DC converters or inverters and realize zero voltage switching for all switches including both inverter bridges switches and the auxiliary switch for three-phase inverters. Then impact of SiC device on soft switching inverters is investigated with respect to the power density and conversion efficiency. Finally experimental results of a soft-switching 20 kW SiC MOSFET grid inverter with 300kHz switching frequency is introduced.


Prof. Mark Dehong Xu received the B.S., M.S., and Ph.D. degrees from the Department of Electrical Engineering, Zhejiang University, Hangzhou, China, in 1983, 1986, and 1989, respectively.

Since 1996, he has been with the College of Electrical Engineering, Zhejiang University, China, as a Full Professor. He was a visiting scholar in the University of Tokyo, Japan, from June 1995 to May 1996. From June to December 2000, he was a Visiting Professor in CPES of Virginia Tech, USA. From February 2006 to April 2006, he was a Visiting Professor in ETH, Switzerland. His current research interests include power electronics topology and control, power conversion for energy saving and renewable energy. He has authored or coauthored six books and more than 200 IEEE Journal or Conference papers. He owns more than 40 Chinese patents and 3 U.S. patents. Dr. Xu is the recipient of four IEEE journal or conference paper awards. He is the IEEE PELS Distinguish Lecturer in 2015-2017. In 2016, he received IEEE PELS R. D. Middlebrook Achievement Award. He is IEEE Fellow.

He is At-Large Adcom Member of the IEEE Power Electronics Society from 2006 to 2008 and from 2017-2019. He is an Associate Editor of the IEEE Transactions on Power Electronics and the IEEE Transactions on Sustainable Energy etc. From 2013, he is the President of the China Power Supply Society.