Circuit Model and Analysis of Multi-Load Wireless Power Transfer System Based on Parity-Time Symmetry

被引：9

作者：

Luo, Chengxin ^{[1
]}

Qiu, Dongyuan ^{[1
]}

Lin, Manhao ^{[1
]}

Zhang, Bo ^{[1
]}

机构：

[1] South China Univ Technol, Sch Elect Power Engn, Guangzhou 510641, Peoples R China

来源：

ENERGIES | 2020年 / 13卷 / 12期

基金：

中国国家自然科学基金;

关键词：

wireless power transfer; multiple loads; parity-time symmetry; circuit model; OPTIMIZATION; INFORMATION;

D O I：

10.3390/en13123260

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In the multi-load wireless power transfer (WPT) system, the output power and transfer efficiency will drop significantly with the change of distance between transmitter and receiver. Power distribution among multiple loads is also a major challenge. In order to solve these problems, a novel multi-load WPT system based on parity-time symmetry (PT-WPT) is proposed in this paper. Firstly, the multi-load PT-WPT system is modeled based on the circuit model. Then, the transmission characteristics of the multi-load PT-WPT system are analyzed. It is found that constant output power with constant transfer efficiency can be maintained against the variation of coupling coefficient, and the power distribution relationship among loads is only related to the coupling coefficient. Further, power distribution under different coupling situations is analyzed in detail to meet different power demands. Finally, taking a dual-load PT-WPT system as an example, the system parameters are designed and the circuit simulation is carried out. The simulation results are consistent with the theoretical analysis, which shows that PT symmetry can be applied to the multi-load WPT system to achieve constant output power, constant transfer efficiency, and power distribution simultaneously.

引用

页数：18

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