Advanced Electric Power Conversion Laboratory

Name: Minfan Fu


School of Info. Science and Tech.

ShanghaiTech University

Room 534, SIST Building 3

393 Middle Huaxia Road

Pudong, Shanghai 201210

Tel: +86-021-20684455

Congratulations! Two journal papers are accepted by TIE and TPEL.

G. Ning, K. Zhao and M. Fu*, “A Passive Current Sharing Method for Multi-Transmitter Inductive Power Transfer Systems", IEEE Transactions on Industrial Electronics, early access.

Abstract: A multi-transmitter(multi-TX) inductive power transfer system would not only offer better spatialfreedom but also improve the overall output capability. Under heavy load condition,it is desirable to fully utilize the output power capability, and the overall inputpower needs to be balanced among the multiple TXs. This paper proposes a simpleand low cost current sharing method to balance the input power. The currentdistribution is analytically studied for an example two- TX system, and thesharing path is proposed to balance the power under coupling variation and coilinductance mismatch. It also explores the influence of sharing path on theefficiency and zero phase operation. Besides, the proposed method is valid forother compensations and can be extended for N-TX (N>2) systems. Finally,a two-TX system is implemented to verify the sharing effect. The currentimbalance factor is effectively reduced from 37% to 2.7% under the worstcoupling cases.

Y. Liu, T. Wu, and M. Fu*, “Interleaved Capacitive Coupler for Wireless Power Transfer", IEEE Transactions on Power Electronics, early access.

Abstract: Capacitive power transfer is becoming an attractive alternate for wireless chargers. A coupler with large self and mutual capacitance is desirable from the power and efficiency perspective. However, state-of-the-art couplers suffer from the trade- off design issue between these two types of capacitance. In order to improve the required capacitance, an interleaved capacitive coupler is proposed and evaluated based on the Maxwellbased simulation. Using more plates, it can effectively use the coupling space to maintain the required self and mutual capacitance, while minimize the cross coupling effects. Meanwhile, the new coupler is also helpful to reduce the radioactive electric field, and the high-radiation region is reduced dramatically. In the experiment, three types of couplers are built with the same coupling space, compensations, and output power. The proposed interleaved structure can achieve the highest efficiency and minimum radiation.