电动汽车动态无线充电系统弯道互感跌落研究及改进  

Research and Improvement of Mutual Inductance Drop at Corner in Dynamic Wireless Charging System for Electric Vehicles

作　　者：朱郭福 李建贵 王隆扬 李强 陈晨[1] 刘珊 ZHU Guofu;LI Jiangui;WANG Longyang;LI Qiang;CHEN Chen;LIU Shan(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学机电工程学院,武汉430070

出　　处：《电源学报》2024年第4期228-235,共8页Journal of Power Supply

摘　　要：针对目前电动汽车动态无线充电系统的发射线圈多采用分段导轨结构实现接力式动态无线充电,但系统在导轨切换处存在较大的互感跌落导致系统传输效率降低且在弯道处更加突出这一问题,建立弯道动态无线充电模型,通过理论分析推导原、副线圈互感与偏转角度的关系,提出1种弯道处导轨发射线圈的改进结构并进行仿真分析,搭建基于共振磁耦合的弯道动态无线充电平台并进行实验。仿真与实验结果表明,采用改进型导轨发射线圈结构后无线充电系统互感跌落现象显著减小,在偏移角度最大处系统传输效率提升了8.66%,验证了改进型线圈结构的有效性。At present,the transmitting coil in a dynamic wireless charging system for electric vehicles usually adopts a segmented guide rail structure to realize the relay dynamic wireless charging.However,the problem of mutual inductance drop will occur at the switching of the guide rail and result in the reduction of the system transmission efficiency,and this is more prominent at the corner.A corner dynamic wireless charging model was established,and the relationship between the mutual inductance of primary and secondary coils and the deflection angle was deduced through theoretical analysis.An improved structure of the guide rail transmitting coil at the corner was proposed and simulated,and a corner dynamic wireless charging platform based on resonance magnetic coupling was built.Simulation and experimental results show that by using the improved guide rail transmitting coil structure,the mutual inductance drop of the wireless charging system was significantly reduced,and the system transmission efficiency was improved by 8.66% at the maximum deflection angle,thereby verifying the effectiveness of the improved coil structure.

关 键 词：电动汽车 动态无线充电 弯道 互感跌落 改进线圈结构 

分 类 号：TM910.6[电气工程—电力电子与电力传动]