多发射切换式无线电能传输系统耦合特性机理分析  

Coupling Mechanism Analysis for Multi-Transmitter Switching Wireless Power Transfer System

作　　者：谭平安[1,2] 刘春霞 叶良伟 彭涛 高协平 Tan Ping’an;Liu Chunxia;Ye Liangwei;Peng Tao;Gao Xieping(School of Information Engineering Xiangtan University Xiangtan 411105 China;MOE Key Laboratory of Intelligent Computing&Information Processing Xiangtan 411105 China)

机构地区：[1]湘潭大学信息工程学院,湘潭411105 [2]智能计算与信息处理教育部重点实验室,湘潭411105

出　　处：《电工技术学报》2018年第22期5244-5253,共10页Transactions of China Electrotechnical Society

基　　金：湖南省自然科学基金面上项目(2018JJ2400)资助

摘　　要：线圈偏移问题会降低线圈间的互感,同时还引起系统最优负载的动态变化,造成无线电能传输系统的传输效率显著下降。为此,提出一种发射端为多六边形线圈和接收端为圆形线圈的多发射切换式耦合机构,以提高系统对线圈横向偏移的容忍度。首先分析多发射切换式耦合机构的线圈结构及其工作模态,构建该耦合机构在轴对称和横向偏移工况下的互感计算方法,定量分析耦合系数随横向偏移的演化规律,借此确定发射线圈的切换准则,并推导线圈切换后实现高效率运行的最优负载匹配条件。实验结果表明,多发射切换式耦合机构能有效地解决无线电能传输系统的线圈偏移问题,可提升系统的传输效率和稳定性。The coil misalignment problem may reduce the mutual inductance between the coils and also induce the dynamic changes of system optimal load,resulting in a significant decrease in the transmission efficiency of the wireless power transfer(WPT)system.Therefore,this paper presented a multi-transmitter switching coupler to improve the tolerance of lateral misalignment for the WPT system,where in the multi-transmitter is composed of hexagon coils and the receiver is a circular coil.Firstly,the coil structure and working mode of this coupler were analyzed,and the mutual inductance calculation method of the coupler under the condition of axial symmetry and lateral misalignment was constructed.Meanwhile,the evolution law of the coupling coefficient with the lateral misalignment was quantitatively analyzed,and the switching criterion of the transmitting coil was determined.Consequently,the change of coupling coefficient after switching was determined and the dynamic matching conditions of the system optimal load was derived.The experimental results show that the multi-transmitter switching coupler can effectively solve the coil misalignment problem of wireless power transfer system,and can improve the transmission efficiency and stability of the system.

关 键 词：无线电能传输 多发射 线圈偏移 切换 

分 类 号：TM724[电气工程—电力系统及自动化]