A Mutual Inductance Identification and Efficiency Optimization Method for the Three-coil Wireless Power Transfer System by Utilizing Switchable Compensation Capacitor

被引：0
|
作者：
Liu X. [1 ]
Song X. [1 ]
Yuan X. [1 ]
Xia C. [1 ]
Wu X. [1 ]
机构：
[1] School of Electrical and Power Engineering, China University of Mining and Technology, Jiangsu Province, Xuzhou
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 22期
关键词：
efficiency optimization; mutual inductance identification; switchable capacitor; three coils; wireless power transfer (WPT);
D O I：
10.13334/j.0258-8013.pcsee.212106
中图分类号：
学科分类号：
摘要：
In order to effectively identify the mutual inductances including cross-coupled mutual inductance of the three-coil wireless power transfer (WPT) system when the load position varies, this paper proposed a method to identify the mutual inductances of the three-coil WPT system by adopting a switchable compensation capacitor. Firstly, the mathematical model of the three-coil WPT system with a switchable relay compensation capacitor was established. The relationship between mutual inductance and input impedance of the system before and after switching the relay compensation capacitor was studied, and the mutual inductance identification method was derived. Subsequently, the relationship between coil-to-coil efficiency and relay compensation capacitance was analyzed, and the optimization method of coil-to-coil efficiency was derived. The detailed compensation capacitance optimization method was also presented. At last, an experimental setup was built up to validate the theoretical analysis. The experimental results show that the identification accuracy of the mutual inductances among the three coils could reach 96%,averagely, and the maximum coil-to-coil efficiency improvement is 3.16%, proving effectiveness and accuracy of the mutual inductance identification method and the coil-to-coil efficiency improvement method for the three-coil WPT system by utilizing the switchable compensation capacitor. © 2022 Chinese Society for Electrical Engineering. All rights reserved.
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页码：8309 / 8320
页数：11
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