An Synchronization Method for Track Type Wireless Power Transfer System Existing Energy Feedback Route

For the wireless power transfer (WPT) system, it can improve the output power and reduce the voltage and current stress on the components through adding multiple transmitters in the system. A dual-transmitter WPT (DT-WPT) system is proposed in this paper, which includes two operating modes: standby mode and strengthening mode. On this basis, a synchronization control method of the power sources in both transmitters without communication is proposed under strengthening mode. Furthermore, the output characteristic of the system is analysed according to the variations of the mutual inductances and the load. The validity of the theoretical analysis and the feasibility of the system are verified by experiments.