电动汽车无线供电系统DD型收发线圈优化

Optimization of DD transceiver coil for electric vehicle wireless power supply system

为解决传统DD型线圈在动态移动过程中互感波动显著以及线圈内部耦合的问题,分析其主要影响参数并结合COMSOLMultiphysics仿真确定优化方向,设计了一种改进DD型线圈,通过理论及优化算法得到线圈最优的分离间隙以及耦合距离,最后搭建系统实验平台进行了验证。研究表明,改进DD型线圈在动态移动过程中电压波动为8%,提高了7%;分离间隙为5 cm,耦合高度为15 cm,互感达到最大值。该设计有效解决了供电系统互感波动以及内部耦合问题。

To solve the problems of significant mutual induction fluctuation and internal coupling of traditional DD coil in the dynamic movement process,the main influencing parameters are analyzed and combined with COMSOL Multiphysics simulation to determine the optimization direction.An improved DD coil is designed.The optimal separation gap and coupling distance of the traditional DD coil are obtained by theory and optimization algorithm.Finally,a system experimental platform is built to verify the optimal design.The results show that the voltage fluctuation of the improved DD coil in the dynamic moving process is 8%,which increases by 7%.The separation gap is 5 cm,the coupling height is 15 cm,and the mutual inductance reaches the maximum value.The proposed design can effectively solve the problems of mutual inductance fluctuation and internal coupling of the power supply system.