A Three-Coil Constant Output Wireless Power Transfer System Based on Parity-Time Symmetry Theory

被引：1
|
作者：
Yue, Yuntao [1 ]
Yang, Jiahui [1 ]
Li, Ruofan [2 ]
机构：
[1] Beijing Univ Civil Engn & Architecture, Sch Elect & Informat Engn, Beijing 102616, Peoples R China
[2] Beijing Jiaotong Univ, Sch Elect Engn, Beijing 100044, Peoples R China
来源：
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 22期
关键词：
wireless power transfer (WPT); parity-time (PT) symmetry; relay coil; power control;
D O I：
10.3390/app132212188
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In a three-coil wireless power transfer system with relay coils, the transmission efficiency and output power of the system decreases with changes in the adjacent coupling coefficients. Controlling the power of three-coil wireless power transfer systems is also a significant challenge. To solve these issues, a three-coil wireless power transfer system based on parity-time symmetry is proposed in this paper. First, a three-coil parity-time wireless power transfer system was modeled based on a circuit model. Then, the transmission and gain characteristics of the three-coil parity-time wireless power transfer system were analyzed. It was found that when the system is in a parity-time-exact region, it can maintain a constant transmission efficiency and output power, and its output power is independent of the coupling coefficient. In addition, based on the output characteristics of the three-coil parity-time wireless power transfer system, a power control method and a working range detection method were proposed to attain a constant power output. Finally, a three-coil parity-time wireless power transfer system was experimentally tested.
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页数：18
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