一种新型电动汽车无线充电系统磁耦合机构

A Novel Magnetic Coupling Mechanism for Wireless Charging System of Electric Vehicle

电动汽车无线充电系统中,能量拾取端与发射端的横、纵向偏移问题导致了传输效率降低和传输功率不稳定。为此,通过对常用线圈绕线方式以及磁芯结构的优化,设计了一种"分组串绕线圈+凹凸磁芯结构"的复合型磁耦合机构。阐述了该复合型耦合机构的设计过程,给出了参数设计方法,并基于COMSOL软件对其磁场分布特性及横、纵向偏移特性进行了有限元仿真计算及性能分析,分析结果表明该耦合机构具有较好的抗偏移特性。

In the wireless charging system of the electric vehicle, problems of vertical and longitudinal offset of energy pick- up terminal and transmitting terminal may cause reduction of transmission efficiency and unstable transmission power. Therefore, it is required to optimize common winding mode of the coil and magnetic core structure, and this paper designs a kind of composite magnetic coupling mechanism with the structure of group-sequential coil and concave-convex core. It states design process of this kind of composite mechanism and provides design method for relevant parameters. On the basis of COMSOL software, it makes finite element simulation calculation and performance analysis on characteristics of magnetic field distribution and vertical and longitudinal offset. The result indicates this coupling mechanism has better anti- offset characteristic.