Study of Wireless Power Transfer System Through Strongly Coupled Resonances

Wireless Power Transmission ( WPT) based on strongly coupled resonances can be achieved medium-range distance. In this paper, a system of wireless power transmission based on strong-coupling resonances is presented. We analyse the strongly coupled model of the system and investigate the efficiency of the resonator´s receiving coils with characteristics of the distance and the extreme problems experimentally. Theoretical and experimental results show that the largest energy transfer takes place in two resonators coupling resonance; If the system parameters and transfer distance are fixed, the transfer efficiency will change with the load, and a maximum value will be obtained.