Parameter Design of 30kW Coupling Mechanism for Electric Vehicles

In the wireless charging system of electric vehicles, considering the changes in the parking position of electric vehicles, the design of the electromagnetic coupling mechanism needs to ensure efficient energy transmission over a wide transmission distance and large offset positions. Due to the influence of both size and weight, the size optimization design of the vehicle terminal coil is required. This chapter focuses on the design and optimization of asymmetric electromagnetic coupling mechanisms. Firstly, an expression for voltage and current stress and efficiency in wireless energy transmission systems is established and derived. Then, based on the relationship between efficiency and coil parameters, coil size optimization is carried out with the optimization goals of anti offset ability and high efficiency. Through simulation verification, the overall optimization of the coil is achieved.