Maximum Efficiency Tracking for Wireless Power Transfer Systems With Dynamic Coupling Coefficient Estimation

被引：237

作者：

Dai, Xin ^{[1
]}

Li, Xiaofei ^{[1
]}

Li, Yanling ^{[1
]}

Hu, Aiguo Patrick ^{[2
]}

机构：

[1] Chongqing Univ, Sch Automat, Chongqing 400044, Peoples R China

[2] Univ Auckland, Dept Elect & Comp Engn, Auckland 1142, New Zealand

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Coupling coefficient; impedance matching; maximum efficiency tracking; wireless power transfer (WPT); LOAD;

D O I：

10.1109/TPEL.2017.2729083

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Maximum efficiency tracking is an important issue for wireless power transfer (WPT) system. Traditional maximum efficiency tracking method normally focuses on load impedance matching with fixed coupling condition. However, WPT system is a loosely coupling system, the coupling coefficient varies due to relative movement between the primary and secondary sides. Unknown to this variation may result in failure of the tracking. In this paper, a novel maximum efficiency tracking method is proposed with integrated dynamic coupling coefficient estimation. This method can take almost all requirements for maximum efficiency tracking into account including adaption for coupling coefficient and load variation, and output controllability. The tracking method is easy to implement because no additional circuitry or measurement is required. Experimental results have verified the correctness of the proposed coupling coefficient estimation method. And the maximum efficiency tracking results show the system can achieve a good performance against coupling coefficient and load variation with the proposed tracking method.

引用

页码：5005 / 5015

页数：11

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