基于双边LCC拓扑结构的无线充电系统集成线圈设计研究

Design of integrated coil for EV wireless charging systems based on bilateral LCC topology

双边LCC拓扑结构为电动汽车无线充电提供了一种高效的补偿方法,然而两个补偿线圈占据了很大的体积。为了解决电动汽车无线充电系统体积增大问题以及提高系统传输效率,文中提出了一种新型集成线圈的方法,将双极性补偿线圈集成到单极性主线圈中,利用3D有限元分析工具ANSYS Maxwell对新型电磁耦合机构进行优化,通过优化补偿线圈的长宽比来消除系统中的多余耦合系数,从而提高系统的传输效率。通过实验结果表明,采用该集成线圈方法的无线充电系统受两侧线圈的水平或垂直方向偏移的影响较小,此时系统传输效率较高。

The bilateral LCC topology provides a highly efficient compensation method for the wireless charging of EV.However,the two compensation coils occupy a large volume.In order to solve the problem of volume increase in electric vehicle charging system and improve the transmission efficiency of system,this paper puts forward a novel method of integrated coil,which integrates the dual polarity compensation coil into single polarity in the main coil.The new electromagnetic coupling mechanism is optimized by using 3D finite element analysis tool ANSYS Maxwell,and the redundant coupling coefficient in the system is eliminated by optimizing the length-width ratios of compensating coil,so as to improve the transmission efficiency of the system.The experimental results show that the wireless charging system using the integrated coil method is less affected by the horizontal or vertical offset of the two coils,and the transmission efficiency of the system is higher.