Three-coil Wireless Power Transfer System With Constant Output Power and Constant Transfer Efficiency Characteristics

被引：0
|
作者：
Wang Z. [1 ]
Qiu D. [1 ]
Zhang B. [1 ]
Xiao W. [1 ]
Chen Y. [1 ]
Xie F. [1 ]
机构：
[1] School of Electric Power Engineering, South China University of Technology, Guangdong Province, Guangzhou
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 20期
基金：
中国国家自然科学基金;
关键词：
constant output power; constant transfer efficiency; parity time symmetry; relay coils; wireless power transfer;
D O I：
10.13334/j.0258-8013.pcsee.220202
中图分类号：
学科分类号：
摘要：
The wireless power transfer (WPT) technology with relay coils is an effective solution to increase the transmission distance of the system. Based on the parity time (PT) symmetric principle, a WPT system with relay coils can maintain constant output power and constant transfer efficiency when the transmission distance changes. However, in the existing system, the condition of equal distance between adjacent coils must be satisfied, which greatly limits the practicability of the system. Therefore, this paper proposed a three-coil PT symmetric WPT system with variable parameters in the transmitting coil. When the system failed to satisfy the equal distance condition, the values of the variable inductor and capacitor were adjusted to meet the PT symmetric conditions. The paper firstly deduced the output characteristic of the system, then discussed the construction and control method of variable parameters, and finally built an experimental platform for the proposed system. The experimental results show that compared with the existing system, the proposed system could maintain constant power and transfer efficiency when the equal distance condition is not satisfied. ©2022 Chin.Soc.for Elec.Eng.
引用
收藏
页码：7332 / 7342
页数：10
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