Tuesday, 15 September 2020 4:00 PM CET (10:00 AM ET)

by Chengbin Ma (Shanghai Jiao Tong University, CHINA)

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Wireless charging or wireless power transfer (WPT) provides a convenient and viable solution without the need for major breakthrough in today’s battery technology, especially in terms of energy density. At present, WPT operating at a high frequency, such as 6.78 MHz, is widely regarded as a promising candidate technology for the mid-range transfer of a medium amount of power. Physically, a higher operating frequency improves the spatial freedom of power transfer and also makes it possible to develop a more compact and lighter WPT system. At the same time, due to the high-frequency operation, circuit-level complexity and multiple objectives in the actual MHz WPT systems, system-level analysis and design are particularly important for achieving high performance (e.g., high efficiency, low noise, and robustness) of a final system. In this webinar, the main power conversion topologies are first reviewed and compared; then, taking the Class E^2 topology as an example, a systematic methodology is explained to model and design a complete MHz WPT system; finally, the methodology is further extended to multiple-receiver MHz WPT systems, where the robustness of operation is particularly emphasized. The developed modeling and design method is based on the impedance analysis of each component from the final load, rectifier, coupling coils, to power amplifier. Therefore, this methodology itself, i.e., the design concept, is universal for MHz WPT systems using other representative circuit topologies.

Presenter’s bio:

Professor Chengbin Ma received the B.S. degree in industrial automation from East China University of Science and Technology, Shanghai, China, in 1997, and the M.S. and Ph.D. degrees in electrical engineering from The University of Tokyo, Tokyo, Japan, in 2001 and 2004, respectively. From 2004 to 2006, he was an R&D Researcher with the Servo Laboratory, FANUC Limited, Japan. Between 2006 and 2008, he was a Postdoctoral Researcher with the Department of Mechanical and Aeronautical Engineering, University of California, Davis, USA. He joined the University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, China, in 2008, and currently an Associate Professor of electrical and computer engineering. His research interests include high-frequency wireless power transfer, energy storage and management, motion control and mechatronics, and wide applications in electronic devices, electric vehicles, microgrids, smart grids, etc.

Dr. Ma is an IEEE senior member. He serves as Delegate of Energy Cluster and Chair of Shanghai Chapter, IEEE Industrial Electronics Society (IES). He was a former Chair of Energy Storage Technical Committee at IES. Dr. Ma is an Associated Editor for the IEEE Transactions on Industrial Informatics and IEEE Journal of Emerging and Selected Topics in Industrial Electronics. He won many teaching and research awards at Shanghai Jiao Tong University, such as Koguan Top Ten Best Teacher Award in 2017 and Koguan Top Ten Research Group Award in 2014. He also received Research Excellence Award from AirFuel Alliance, USA, in 2019 (email: chbma@sjtu.edu.cn; lab: http://umji.sjtu.edu.cn/lab/dsc/).