Research on Wireless Charging System of 11kw Electric Vehicle Based on Combined Magnetic Core

Aiming at the problem that the secondary receiving end of electric vehicle wireless charging system is heavy and the ferrite core is easily saturated in high-power applications, a combined magnetic core is proposed in this paper. The high saturation nanocrystalline magnetic core is combined with ferrite magnetic core to solve the problems of lightweight receiving side and easy saturation of magnetic core. This paper first analyzes the problems of ferrite core in the existing electric vehicle wireless charging system, then proposes the combined core structure applied to the vehicle receiving end, and then carries out simulation verification in COMSOL and MATLAB simulation software, and finally builds a set of 11kw experimental device for verification. The experimental results show that the coupling coefficient is better than that of ferrite core. At a transmission distance of 16cm, the system output power is maintained at 11kw, and the final coupling mechanism temperature is maintained at 83 degrees.