Power optimization method of magnetic coupling resonant wireless energy transmission system

Abstract

Magnetic coupled resonant wireless energy transmission technology is a way of wireless energy transmission. In the field of magnetic coupled resonant wireless energy transmission system, the distance between the transmitting coil and the receiving coil is too large and the position is fixed. The system is in the state of under coupling, which causes the system output power to be too small. The case of adding the relay coil between the transmitting coil and the receiving coil is proposed to improve the output power. Considering that the introduction of the relay coil may make the system’s charging state transition from under coupling state to over coupling state directly, the frequency splitting phenomenon is suppressed by adjusting the position of the relay coil, the angle of the rotating relay coil, the output power before and after the measures is changed. The simulation experiment shows that the measures of increasing the relay coil and taking suppression of frequency division to restrain the frequency can greatly improve the output power.