电动汽车无线充电线圈错位及偏移影响研究

Study on Influence of Lateral Displacement and Angle Deviation of Wireless Charging Coil of The Electric Vehicle

在电动汽车无线充电的研究中,针对电动汽车在泊车时存在的充电线圈横向错位以及角度偏移问题,利用有限元仿真软件和电路仿真软件进行联合仿真,在有限元仿真软件中搭建模型,电路仿真软件中实现电路功能,搭建了电动汽车无线充电系统。分析了其在不同错位距离和不同偏移角度时的磁场分布和耦合系数,进而得到了系统的传输效率和输出功率变化曲线。仿真结果表明,传输效率会随着错位距离的增加先减小后增大最后趋于零,输出功率会随着错位距离的增加先增大后减小;而传输效率和输出功率随着角度的偏移变化较小。仿真结果为实际的电动汽车自动跟踪定位泊车提供了参考。

In the research of electric vehicle wireless charging, aiming at the problem of the horizontal displace- ment and the angle deviation of the charging coil in electric vehicles at parking lots, we used the finite element simu- lation software and the circuit simulation software for joint simulation, built the model based on finite element simula- tion software and the circuit function based on circuit simulation software. Then the distribution of the magnetic field and the coupling coefficient were analysed with different dislocation distances and different offset angle to obtain the transmission efficiency and the output power change curve of the system. The result show that the transmission effi- ciency decreases with the increase of the distance of the dislocation at first, then increases and finally tends to zero, while the output power increases at first and then decrease with the increase of the distance of the dislocation. And the offset of the angle has little effect on the transmission efficiency and the output power. Simulation results provide a reference for the actual electric vehicle automatic tracking and positioning parking system.