基于可移动中继线圈的无线充电系统抗偏移能力提升方法研究  

Misalignment tolerance improvement of wireless charging systems based on movable intermediate coil

作　　者：洪潇 张伟峰[1] 夏霖 金正军 龚成尧 王丰 王钰博 HONG Xiao;ZHANG Weifeng;XIA Lin;JIN Zhengjun;GONG Chengyao;WANG Feng;WANG Yubo(State Grid Hangzhou Power Supply Company,Hangzhou 310016,China;School of Electric and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网浙江省电力公司杭州供电公司,杭州310016 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《浙江电力》2022年第12期106-113,共8页Zhejiang Electric Power

基　　金：国网浙江省电力有限公司杭州供电公司科技项目(5211HZ2001WL)。

摘　　要：无线充电技术是当前电动汽车行业关注的热点,但无线充电磁耦合器原副边线圈之间的偏移会导致其效率下降。对此,提出一种带有可移动中继线圈的无线充电磁耦合器,以提升无线充电系统的抗偏移能力。首先,分析了中继线圈补偿电容对磁耦合器效率的影响,并确定了效率最大时的中继线圈补偿电容。然后,对副边线圈及中继线圈不同偏移情况下的磁耦合器效率进行仿真分析,得到偏移情况下中继线圈的最优补偿参数及最佳位置。最后,通过一台3 kW样机对提出的磁耦合器及中继线圈位置控制策略进行实验验证,结果表明:采用最佳中继线圈位置后,当副边线圈横向偏移达到线圈外径43%(300 mm)时,磁耦合器效率仅下降1.8%。Wireless power transfer(WPT)has become a hot issue in the electric vehicle industry.However,the mis⁃alignment between the primary and secondary coils of the WPT magnetic coupler may decrease its efficiency.There⁃fore,this paper presents a WPT magnetic coupler with a movable intermediate coil to improve the anti-misalignment capacity of the system.First,the effect of the relay coil compensation capacitor on the efficiency of the magnetic cou⁃pler is analyzed,and the relay coil compensation capacitance at the maximum efficiency is decided.Then,the effi⁃ciency of the magnetic coupler under various misalignments of the secondary coil and relay coil is simulated and ana⁃lyzed to conclude the optimal compensation parameter and the most favorable location of the relay coil.Finally,the proposed magnetic coupler and relay coil position control strategy is experimentally verified through a 3-kW prototype.The results show that with the optimal relay coil position,the efficiency of the magnetic coupler decreases by 1.8%when the horizontal misalignment of the secondary coil reaches up to 43%of the coil’s outer diameter(300 mm).

关 键 词：无线充电 磁耦合器 最优耦合系数区间 抗偏移能力 

分 类 号：TM910.6[电气工程—电力电子与电力传动] U491.8[交通运输工程—交通运输规划与管理]