Analysis of Phase-Shifting Constant Voltage Control of LCC-S Wireless Power Transfer System

Considering that the magnetically coupled wireless power transfer (MC-WPT) system faces a wide input voltage range and load fluctuations in some special application scenarios, resulting in unstable output voltage, the LCC-S type compensation topology was chosen. Firstly, the voltage regulation is realized by cascaded Boost converter, full-bridge inverter and rectifier circuit, then the PID regulator and closed-loop phase shift control are used to achieve constant voltage output, improving system immunity to input voltage and load. Finally Matlab is used to simulate and analyze the overall system, which verifies the accuracy and feasibility of the method.