电动汽车无线充电系统不同结构线圈间互操作性评价方法研究

The interoperability problem between the ground-end equipment and vehicle-mounted equipment of different manufacturers is one of the key issues to ensure that the technical routes of products in related industries at home and abroad are compatible and interconnected, and to realize the commercialization of wireless charging for electric vehicles. A method to evaluate the interoperability between different coil structures of electric vehicle wireless charging system based on the two-port impedance of the circuit was proposed. The research object of this subject is the evaluation method, which mainly analyzed and studied the interoperability between the same circuit compensation topology and coupling coils with different structures. The Z_VA and Z_GA impedance interfaces were defined respectively, the impedance interface formula was derived. The square-square coil combination as a reference used to obtain the reference impedance zone Z_GA when the vehicle-mounted equipment in the system and the supporting ground-end equipment were coupled. This impedance area used to as the reference. The interoperability between the circle, DD type coils and the square coils ground-end equipment of this paper were verified by detecting the impedance area generated by the coupling between the receiving coils under test and the reference transmitting coil. The interoperability coefficient is defined to consider the interoperability between different coils. This paper proves the correctness of the proposed method for evaluating the interoperability between coils of different structures through simulation and experiments.