Design and Optimization of Load-Independent Magnetic Resonant Wireless Charging System for Electric Vehicles

被引:95
作者
Cai, Changsong [1 ]
Wang, Junhua [1 ]
Fang, Zhijian [1 ]
Zhang, Pengcheng [2 ,3 ]
Hu, Meilin [1 ]
Zhang, Junkun [4 ]
Li, Liang [1 ]
Lin, Zhongzheng [1 ]
机构
[1] Wuhan Univ, Sch Elect Engn, Wuhan 430072, Hubei, Peoples R China
[2] Hebei Univ Technol, Sch Elect Engn, Tianjin 300130, Peoples R China
[3] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA
[4] Inst New Energy, Wuhan 430040, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Load-independent; wireless charging system; compensation topology; coupling structure; POWER TRANSFER;
D O I
10.1109/ACCESS.2018.2810128
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
A load-independent wireless power transfer system with constant current and constant voltage output for electric vehicles charging is designed and optimized in this paper. Wireless charging system based on LCL-S or LCL-LCL compensation topology is systematically analyzed. And dynamic LCL-S/LCL switching topology is designed and simplified to achieve constant current in the transmitting coil and load-independent constant current and constant voltage output, which can be controlled easily. Moreover, the coupling structures composed of different coil shapes and shielding structures are comparatively studied to improve the coupling stability under misalignment. Figure-of-merit and coupling change rate Delta kt defined in this paper are the key parameters in the process of coupling structure design and optimization. The combination of rounded rectangular spiral coil and splicing magnet core units is optimized as the coupling structure of the wireless charging system. Finally, the resonant wireless charging system prototype is being built and tested. The experimental results show that the load-independent and other characteristics of the implemented system are well correlated with the theoretical analysis and design.
引用
收藏
页码:17264 / 17274
页数:11
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