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Energies 2017, 10(3), 323; doi:10.3390/en10030323

A Witricity-Based High-Power Device for Wireless Charging of Electric Vehicles

School of Electrical Engineering, Wuhan University, Wuhan 430072, China
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Academic Editor: Sheldon S. Williamson
Received: 14 January 2017 / Accepted: 1 March 2017 / Published: 7 March 2017
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Abstract

In this paper, a Witricity-based high-power device is proposed for wireless charging of electric vehicles. According to the specific requirements of three-stage charging for electric vehicles, four compensation modes of the Witricity system are analyzed by the Loosely Coupled Theory among transformer coils and the Substitution Theorem in circuit theory. In addition, when combining voltage withstand levels, the current withstand capability, the switching frequency of electronic switching tubes, and the features of the resonant circuit, the series-parallel (SP) compensation mode is selected as the best compensation mode for matching the capacitor of the system. The performances of coils with different ferrite core arrangements are compared by simulations and models. The feasibility of the system is verified theoretically and the system functions are evaluated by the joint simulation of Simplorer and Maxwell. Finally, a Witricity-based high-power device is proposed as designed, and the correctness of theoretical analyses and simulation results are verified. View Full-Text
Keywords: electric vehicles; Witricity; the joint simulation; compensation modes; high-power device electric vehicles; Witricity; the joint simulation; compensation modes; high-power device
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Dai, Z.; Wang, J.; Long, M.; Huang, H. A Witricity-Based High-Power Device for Wireless Charging of Electric Vehicles. Energies 2017, 10, 323.

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