Abstract During the dynamic wireless charging of electric vehicles, the offset from the vehicle Rx coil will reduce the mutual inductance of the coupling mechanism, which results in a significant reduction on the transmission efficiency of the system. Now a real-time detection method of electric vehicle position based on double coils is proposed. By analyzing the change trend of the pickup voltage in the detection coil, the correspondence among the lateral deviation distance, the offset angle and the pickup voltage is obtained by difference ratio sum method, the position information of electric vehicle will be worked out. Then the PID with variable structure was deployed algorithm to realize the self-correction of the electric vehicle driving route. The construction of experimental platform verifies the feasibility of the positioning method. The results revealed that when a lateral deviation takes place, this method can guarantee the automatic correction to the path of an electric vehicle during the dynamic wireless charging process. The advantages of this method are high sensitivity, fast correction speed, a simple structure, etc.

中文翻译：

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基于动态无线充电的电动汽车位置检测与路径修正

摘要 电动汽车在动态无线充电过程中，车辆Rx线圈的偏移会降低耦合机构的互感，导致系统传输效率显着降低。现提出一种基于双线圈的电动汽车位置实时检测方法。通过分析检测线圈中拾波电压的变化趋势，采用差比求和法得到横向偏差距离、偏移角与拾波电压之间的对应关系，得到电动汽车的位置信息。然后采用变结构PID算法实现电动汽车行驶路线的自校正。实验平台的搭建验证了定位方法的可行性。结果表明，当发生横向偏差时，该方法可以保证电动汽车在动态无线充电过程中的路径自动修正。该方法具有灵敏度高、校正速度快、结构简单等优点。