Switching apparatus and control method based on multi-transmission resonant wireless power transmission system

The invention provides a switching apparatus and a control method based on a multi-emission resonant wireless power transmission system. The switching apparatus comprises multiple transmission coils,change-over switches, compensation capacitors and a control circuit, a current sensor in the control circuit is connected with a conditioning circuit, the conditioning circuit is connected with an A/Dconverting circuit, the A/D converting circuit is connected with an FPGA controller, the FPGA controller is connected with a level converting circuit and a driving circuit, the driving circuit is connected with a switching device of a full-bridge inverter, and the level converting circuit is connected with a relay array. The control method includes a switching criterion and a control algorithm, in the control algorithm, switch group control signals enabling the system to be in an optimal work mode are accurately output through detection of currents of transmitting terminals in different workmodes according to the swit