Advanced Electric Power Conversion Laboratory
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Contact

Name: Minfan Fu

Email:fumf@shanghaitech.edu.cn

Address:

School of Info. Science and Tech.

ShanghaiTech University

Room 534, SIST Building 3

393 Middle Huaxia Road

Pudong, Shanghai 201210

Tel: +86-021-20684455


Three papers from AEPCL are accepted by IPEMC 2020-ECCE Asia

IPEMC 2020-ECCE Asia is one of the leading IEEE conferences in power electronics and motion control, and will be held during May 31-June 3, 2020, at Nanjing, China. This conference provides the best international forum to present and discuss the progresses in research, development, and application of system integration, power convertors and control, motor drivers, power quality mitigation, wireless power transfer and so on.


Three papers from AEPCL are accepted by IPEMC 2020-ECCE Asia as below:


Y. Liu, S. Wang, G. Zheng, G. Ning, T. Wu and M. Fu, “Induced Voltage Source Model for Capacitive Power Transfer Using Vertical Coupler”, 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCEAsia), Nanjing, China, May 31-June 3, 2020.

Abstract:

Compared to inductive power transfer, capacitive power transfer system has several unique benefits, such as low cost, no eddy current loss, and no need for magnetic cores. It requires proper capacitive coupler model to design the compensation. However, most of the existing models, like the six-capacitor and induced current source model, have many coupling-dependent parameters. Based on modeling approach for inductive coupler, the induced voltage source model is introduced for the capacitive coupler. The self-capacitance is derived and shown to be coupling independent.This paper will explore the accuracy of IVS model for different coupler structure. Under horizontal misalignment, both couplers have coupling-independent self-capacitance, but only the horizontal coupler can keep this benefit when the vertical position changes.


G. Zheng, P. Zhao, G. Ning, Y. Liu and M. Fu, “Zero Voltage Switching of a Low-Power IPT System with High-Step Down Voltage Ratio”, 9th International Power Electronics and Motion Control Conference(IPEMC2020-ECCE Asia), Nanjing, China, May 31-June 3, 2020.

Abstract:

An unregulated inductive power transfer (IPT) stage is widely used to simplify the control. This stage is able to offer isolation and voltage level conversion. It is promising to introduce such an IPT stage for off-line charger. However, it is easy to lose the zero voltage switching, especially for high-voltage low-current applications. This paper explores a systematic approach to analyze the ZVS lost mechanism. Finally, a 25-W wireless fast charger is designed with optimal design parameters for ZVS operation.


G. Ning, S. Wang, G. Zheng, Y. Liu and M.Fu, “A Novel Passive Current Sharing Method for a Two-Transmitter One-Receiver WPT System”, 9th International Power Electronicsand Motion Control Conference (IPEMC2020-ECCE Asia), Nanjing, China, May 31-June 3, 2020.

Abstract:

Wireless power transfer(WPT) has been developed more and more mature as traditional converters. The technology of multi phases in parallel in traditional PE system can also be used in WPT system. However, because of deviation in each phase, it will introduce current imbalance. Those exciting methods for current sharing in traditional power electronics converters need complex control strategy. In this paper, a novel passive current sharing methodis proposed for a two-transmitter one-receiver wireless charging system. Automatic current sharing is achieved by adding a path between the two transmitter coils. The current sharing performance is evaluated through the circuit analytical model. The proposed method can automatically balance the input currents without additional active circuits and control strategy. A 20-W two-transmitter one-receiver system is built to verify the balancing effects.