Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (10): 152-158.doi: 1000-565X(2012)10-0152-07

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Characteristic Analysis of Magnetic Resonant Coupling-Based Wireless Power Transfer System with Two Receivers

Zhang Bo  Zhang Qing   

  1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-08-01 Online:2012-10-25 Published:2012-09-01
  • Contact: 张波(1962－) ，男，教授，博士生导师，主要从事电力电子系统分析与控制研究． E-mail:epbzhang@ scut.edu.cn
  • About author:张波(1962－) ，男，教授，博士生导师，主要从事电力电子系统分析与控制研究．
  • Supported by:

    国家自然科学基金重点项目( 50937001) ; 南方电网科学院项目( SEPRI 2011K1168B01)

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Abstract:

In this paper,a model of the magnetic resonant coupling-based wireless power transfer system with two receivers is constructed. Thus,the expressions of the transfer power and efficiency of the system are deduced. The operation characteristics of the system are analyzed by considering the relative positions of the transmitter and the two receivers,and the corresponding experiments are carried out,thus verifying the correctness of the model and characteristic analyses. It is found that the extreme points of the output power and efficiency of the system with the two receivers placed on the same side of the transmitter are both different from those on the different sides,and that they occur at a resonant frequency on the same side,but not on the different side. The findings provide a theoretical basis for the optimization design of the system.

Key words: receiver, resonant wireless power transfer, transfer power, transfer efficiency