Design of wireless power transfer system based on resonant coupling

FU Wenzhen1, ZHANG Bo2, QIU Dongyuan2
(1. Mechanical and Electrical Engineering college, Jiaxing College, Jiaxing 314000, China;
2. School of Electric Power, South China University of Technology, Guangzhou 510640, China)

Abstract: Distance and efficiency is the development bottleneck of wireless energy transfer system. Resonant coupling technology can solve this problem effectively. From the circuit mode of receiving and emission coil，it was found that detune is the key reason of low efficiency based on the deep studying of resonant coupling system. And then, a wireless pave fransfer system was desinged, which the rated transmission power is 30 W and the transmission frequency is 1 MHz. Also, frequency-tracking technology was used in the emission coil to reduce power loss when detuning. Lastly, experiment validates this design and it has a good coherence with the theory calculations.
Key words: resonant coupling； detuning； frequency tracking； receiving and emission coil