Analyze the Wireless Power Transmission System with Constant Voltage Output Based on Active Impedance Matching

The aim of this paper is to study the application of wireless power transmission technology in power transmission to solve the problem of unstable output voltage due to the change of load impedance. By designing a wireless power transmission system based on active impedance matching, the optimal load impedance is determined by adjusting the phase shift and duty cycle, so as to realize impedance matching and improve the efficiency of the whole system. In addition, the feasibility of the system is demonstrated by simulating the relevant parameters and designing a circuit that can realize active impedance matching and constant voltage output, so that the error between the output voltage sampling value and the reference voltage is less than 2%, and the duty cycle is always around 50%, which provides an effective solution for the practical application of the wireless power transmission technology.