WPT系统最大效率跟踪下的实时耦合系数估计方法  

Real-Time Estimation Method of Coupling Coefficient with Maximum Efficiency Tracking in WPT System

作　　者：刘媛媛[1,2] 冯宏伟 赵振荣 武彩霞 LIU Yuanyuan;FENG Hongwei;ZHAO Zhenrong;WU Caixia(Wuxi Vocational College of Science and Technology,Wuxi Jiangsu 214028,China;Jiangnan University,Wuxi Jiangsu 214122,China;Wuxi Institute of Technology,Wuxi Jiangsu 214121,China)

机构地区：[1]无锡科技职业学院,江苏无锡214028 [2]江南大学,江苏无锡214122 [3]无锡职业技术学院,江苏无锡214121

出　　处：《电子器件》2020年第6期1299-1303,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(61773138);2020年江苏省高校“青蓝工程”优秀教学团队项目。

摘　　要：无线电能传输(WPT)系统在实际应用中的关键性问题是传输效率。WPT系统是一种松散耦合系统,耦合系数因发射侧和接收侧线圈的相对运动而变化,从而影响电能的传输效率。对发射侧和接收侧的电压电流值进行实时检测,利用检测值对耦合系数进行实时估计,同时利用Buck-Boost电路作为阻抗匹配网络实现WPT系统的最大效率跟踪控制。通过仿真和实验验证,证明该耦合系数估计方法在准确度、实时响应、提升电能传输效率等方面均具有明显优势,验证了该方法的有效性和正确性。In practical application,the key problem of wireless power transfer(WPT)system is transfer efficiency.WPT system is a loose coupling system,the coupling coefficient changes due to the relative movement of primary and secondary side coils,which affects the transfer efficiency.The voltage and current values of both primary and secondary side circuits are detected in real time,and the coupling coefficient is estimated in real time with the detected value.At the same time,the Buck-Boost circuit is used as the impedance matching network to realize the maximum efficiency tracking.Through simulation and experimental verification,it is proved that the proposed coupling coefficient estimation method has obvious advantages in accuracy,real-time response and improves power transfer efficiency,which verifies the validity and correctness of the proposed method.

关 键 词：无线电能传输(WPT)系统 耦合系数估计 最大效率跟踪 Buck-Boost阻抗匹配电路 

分 类 号：TM76[电气工程—电力系统及自动化]