Abstract: Electric vehicle wireless charging technology has attracted more and more attention due to its advantages such as safe operation, convenience and flexibility, and has provided fresh vitality for the development of electric vehicles. The coupling coil is a key component of field energy conversion and energy transmission in the wireless charging system, which fundamentally affects the performance of the entire system. Firstly, the coupling coil model is established in the finite element simulation software Ansys Maxwell, including two coupling coils with only coupling coil and aluminum plate with magnetic core; then the two models are simulated to analyze the magnetic field distribution, mutual inductance and coupling coefficient of the magnetic core aluminum plate. Simultaneously, the relationship between the coupling coefficient and the transmission distance and offset distance of the coupling coil is obtained by simulation.

Key words: Coupling coil; Wireless charging system; Maxwell simulation; Electric vehicle

摘要： 电动汽车无线充电技术以其运行安全、方便灵活等优点受到了越来越多的关注，为电动汽 车发展提供了新鲜活力。耦合线圈是无线充电系统中电能场能转换、能量传输的关键部件，从根 本上影响整个系统的性能。文章首先在有限元仿真软件 Ansys Maxwell 中建立耦合线圈模型，包 括只有耦合线圈、带磁芯铝板的耦合线圈两种；然后针对两种模型进行仿真，分析磁芯铝板对磁 场分布、互感和耦合系数的影响，同时仿真得出互感、耦合系数与耦合线圈的传输距离、偏移距 离之间的关系。

关键词: 耦合线圈；无线充电系统；Maxwell 仿真；电动汽车