无线充电磁耦合器的屏蔽层优化设计实验平台

Experimental Platform for Optimal Design of Shielding Layer of Wireless Charging Magnetic Coupler

为减少无线充电系统的体积重量,增强磁耦合器的抗饱和能力,提出了一种由铁基纳米晶带材和铝板构成的复合屏蔽层,以电动汽车无线充电系统的磁耦合器为模拟对象,搭建实验平台并对所提结构进行验证。根据铁氧体与纳米晶带材的优缺点,用有限元法结合电磁场仿真软件Maxwell进行了静态参数测量实验、临近饱和厚度优化实验和效率分析实验。仿真与实验结果表明,所提出的纳米晶带材加铝板的屏蔽结构,在临近饱和状态下,体积可以减小到传统铁氧体屏蔽层的1/4,且当输出功率达到1.5 kW时,传输效率高达90.1%。所设计的实验平台具有丰富的拓展性,可广泛推广应用于电动汽车等多种无线充电领域。

In order to reduce the volume and weight of the wireless charging system and enhance the anti-saturation ability of the magnetic coupler,a composite shielding layer composed of iron-based nanocrystalline strip and aluminum plate is proposed.Taking the magnetic coupler of the wireless charging system of electric vehicle as the simulation object,an experimental platform is built and the proposed structure is verified.According to the advantages and disadvantages of ferrite and nanocrystalline strip,the static parameter measurement experiment,the near-saturation thickness optimization experiment and the efficiency analysis experiment are carried out by the finite element method combined with the electromagnetic field simulation software Maxwell.The simulation and experimental results show that the volume of the proposed shielding structure of nanocrystalline strip and aluminum plate can be reduced to 1/4 of the traditional ferrite shielding layer in the near-saturation situation,and when the output power reaches 1.5 kW,the transmission efficiency is as high as 90.1%.The experimental platform has high expansibility and can be widely used in various wireless charging fields such as electric vehicles.