Adaptive frequency with power-level tracking system for efficient magnetic resonance wireless power transfer

To supply the optimum amount of required power to a load device, an adaptive frequency and power-level tracking system is proposed for an efficient magnetic resonance wireless power transfer in the high frequency band. As a result, the proposed system is able to maintain a power transfer efficiency (PTE) of more than 75% with an optimum received power-level of 88 W for any transfer distance within 0.6 m by directly monitoring the PTE and received power-level via wireless communication.