Analysis of Power Loss in Coupling Mechanism for Electric Vehicle Wireless Charging System

Aiming at the loss analysis of the electric vehicle wireless charging system, this paper focuses on the loss of the coupling mechanism in the system, and carries out theoretical analysis and calculation from the three aspects of Litz coil loss, magnetic core loss and aluminum plate loss, and uses the COMSOL software to conduct finite element analysis to obtain the magnetic field related parameters of the coupling mechanism, and calculates the loss distribution of the coupling mechanism. Finally, combined with the loss of other links of the wireless charging system, the error between the theoretical calculation of the total loss and the actual loss measured by the electric vehicle 11KW wireless charging device is about 8%, which has a good accuracy.