Variable-Inductor Based Tuning Method for Multiple-Relay Wireless Power Transfer System in Composite Insulator

In multiple-relay wireless power transfer system, the system is usually in a state of detuning caused by the variation of resonance parameter with various factors. In order to solve this phenomenon, a dynamic tuning control method based on variable inductor is proposed in this paper. The variable inductance is connected in series at the transmitting coil end to adjust the system impedance so that achieves the purpose of reducing the loss and improving the output voltage gain of the system. Through simulation experiments, the effectiveness of the proposed variable inductor structure to improve the performance of the multiple-relay coil wireless power transmission system is verified.