Switched rely and Optional Source of Magnetic Coupling Resonant Wireless Transfer System

In a Magnetic Coupling Resonant Wireless Power Transfer (MCRWPT) system, adding relay coils is an effective way to increase the transmission distance which reception will enhanced differently at different placements, meanwhile, multi transmitter coils are used to improve the transmission efficiency. In this paper, we adopt a method mixed with switched rely and optional source to enhance the acceptable coverage area of the entire system, so that the receiver can effectively cover the entire space. We establish a general system model to perform mathematical analysis and simulation on the MCRWPT systems of arbitrary coils, and analyse the spatial characteristics from the frequency domain combined with the coupling coefficient. In order to better utilize the spatial characteristics of different system states, we use the feedback information of the receiver to control the relay switch and source, and compare the performance analysis of different control methods.