Research on In-Phase Energy Supply Mechanism in Multiple-Transmitter Wireless Power Transfer Systems

In order to overcome the short transfer distance of two-coil WPT systems, multi-coil WPT systems are increasingly being utilized. This paper focuses on the research of the two-Tx WPT system, proposes and constructs an in-phase energy supply mechanism based on the eigenmodal theory and circuit theory, and deeply analyzes the general analytical expression of the system’s energy efficiency. The coil parameters are designed using the COMSOL finite element software, and a simulation circuit is built in MATLAB/Simulink to verify the system’s energy efficiency. The simulation results show that the in-phase energy supply mechanism is accurate and effective, and the system can achieve the maximum output power with a higher transfer efficiency.