SYNCHRONIZATION METHOD FOR WIRELESS POWER TRANSFER SYSTEM BY DETECTING VOLTAGE TRANSIENT USING A SENSOR INDUCTOR

A wireless power transfer (WPT) system with series-series compensation contains an inverter at a primary side, a rectifier at a secondary side, and a resonant circuit configured between the inverter and the rectifier. The resonant circuit includes a primary coil and a secondary coil. The resonant circuit further contains a sensor inductor connected to the secondary coil. The sensor inductor is adapted to detect voltage transients on the sensor inductor. By analyzing the voltage transients, the system can achieve frequency and phase synchronization between the inverter and rectifier, ensuring that both sides operate in harmony.