Analysis on wireless charging circuit characteristic under the hybrid compensation topology

A hybrid compensation topology circuit of wireless power transfer (WPT) is analyzed in detail, to solve the problem of unstable current or voltage output with dynamic loads under the wireless power transfer system, which is based on the electric vehicle (EV) constant current and constant voltage charging mode. A simplified circuit of an equivalent loosely coupled transformer T model and Mutual Inductance Model to former vice side coil is built in the hybrid circuit topology; The output current and voltage gain and the power efficiency formula are calculated. It is concluded that the wireless power transform system with dynamic load can achieve constant current and constant voltage output by analyzing the principle. In the end, the simulation model of the wireless power transmission system is built in MATLAB/Simulink; The analysis is supported by simulation result.