互操作电动汽车无线充电系统设计方法

电动汽车无线充电的互操作性是指同一发射端可以匹配不同离地间隙、不同充电功率等级的电动汽车接收端进行安全高效的无线充电。国家标准对电动汽车无线充电的互操作性给出了解释和示范，但如何在不同间隙级别、不同功率等级和不同偏移位置下均实现最优的功率传输效率，是互操作设计的一个难题。针对双边LCC电动汽车无线充电系统，以电动汽车无线充电系统标准GB/T38755.1为参考，提出一个满足工程应用需求的互操作无线充电系统优化设计方法。在满足电感量要求下，优化发射线圈表面磁场辐射的均匀度，以效率为目标优化不同间隙与不同功率等级的接收线圈及其补偿参数。制作了一个满足互操作性的11 kW发射线圈与9个不同充电气隙和功率等级的接收线圈，对设计方法进行了实验验证。

Design Method for Interoperable EV Wireless Charging System

The interoperability of electric vehicle(EV) wireless charging refers to the capability of safe and efficient wireless charging between the same transmitter and EV receivers with different ground clearances and different charging power levels. The Chinese national standard has already explained and demonstrated the interoperability of EV wireless charging. However, it is difficult to optimize the design of a wireless charging system under the constraints of different clearances, power levels and offsets with a high efficiency. Aimed at a double-sided LCC EV wireless charging system and based on the Chinese national standard GB/T38755.1 for EV wireless charging system, an optimization design method for an interoperable EV wireless charging system is proposed to meet the needs of engineering applications. Under the requirement of meeting the inductance, the uniformity of the surface magnetic field radiation of the transmitting coil is optimized, and the parameters of receiving coils with different clearances and power levels and the compensation inductance are optimized with the efficiency as an objective. One 11 kW transmitting coil and nine receiving coils with different charging air gaps and power levels were manufactured to meet the interoperability, and the proposed design method was verified by experiments.