Research on Multi-Transmitter Coil Magnetically Coupled Resonance Wireless Power Transfer System

The non-contact power supply approach can avoid many drawbacks of traditional wire-based power supply methods, ensuring the stability of wireless power transfer systems. This paper focuses on the working principle and system structure of magnetically coupled resonance wireless power transfer systems. Based on this, a system with multiple transmitter coils is designed, allowing the system's output power to remain constant under disturbances caused by variations in the coupling coefficient. The mutual inductance model and SS-type compensation structure are selected for design from a circuit perspective. A simulation model for the control design of the wireless power transfer system is built based on simulation software, and the whale optimization algorithm is utilized to tune and optimize the PID control parameters. Analysis of the optimized simulation results indicates that, with PID control, the system can achieve constant output power under variations in mutual inductance, i.e., changes in the coupling coefficient, and exhibits stronger disturbance rejection capabilities.