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

Zhongyu Dai, Junhua Wang, Mengjiao Long and Hong Huang
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Zhongyu Dai: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Junhua Wang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Mengjiao Long: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Hong Huang: School of Electrical Engineering, Wuhan University, Wuhan 430072, China

Energies, 2017, vol. 10, issue 3, 1-14

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.

Keywords: electric vehicles; Witricity; the joint simulation; compensation modes; high-power device (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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