The principle of automobile wireless charging is based on the principle of magnetic field coupling. The main transformer converts electromagnetic energy into high-frequency AC, which is coupled to the receiving coil at the other end of the distance through the coil (low-frequency coil or high-frequency coil) electromagnetic field in the living environment, and then combines the switch power conversion circuit and high-frequency modulation protection circuit in the receiver, and DC-DC boost conversion module to convert the power into the suitable power supply for the car. Realize wireless charging.