RPG Seminar – Full-Range Soft-Switching Pulse Frequency Modulated Wireless Power Transfer
20 Jan, 2021 (Wed)
2:00 pm
Webinar Link:
Meeting ID: 983 6424 3839
Password: 420518

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Mr. Wei Liu
Department of Electrical and Electronic Engineering
The University of Hong Kong


We propose and implement a full-range soft-switching pulse frequency modulated (PFM) wireless power transfer (WPT) system, which not only offers high efficiency but also high controllability, selectivity, and security. Although the phase-shift control has been widely used in various WPT applications, the high-frequency hard-switching operation will inevitably degrade the system’s performance in terms of power losses and hence efficiency during power control. Thus, a soft-switching PFM is newly conceived to suppress the switching frequency and power losses while maintaining full-range soft-switching for effective power control, hence improving the system efficiency. In addition to realizing the controllability, the soft-switching PFM can be further derived to implement the selectivity and security for multi-objective WPT systems. During wireless power control, the proposed method can effectively be improved by up to 5.68% as compared with its counterparts. Theoretical analysis, computer simulation, and hardware experimentation are given to verify the feasibility of the proposed PFM-WPT system.

Biography of the speaker:
Wei Liu received the B.Eng. degree and M.Eng. degree from China University of Petroleum, in 2014 and 2017, respectively. He is currently working toward a Ph.D. degree in Electrical and Electronic Engineering at The University of Hong Kong. He was a Visiting Researcher with the Nanyang Technological University, in 2019. His research interests include power electronics, wireless power transfer techniques, and electric vehicle technologies.


Prof. K. T. Chau

Most seminars are open to the general public, free of charge, unless otherwise stated. Registration is not required. Arrangement for car parking facilities on campus please contact us for details.

For enquiries, please contact:
Department of Electrical and Electronic Engineering,
Room 601, Chow Yei Ching Building,
Pokfulam Road, Hong Kong
Tel: (852) 3917 7093
Email: seminar@eee.hku.hk