Wireless power transmission device and control method

The invention provides a wireless power transmission device and a control method. The wireless electric energy transmission device comprises a transmitting unit which comprises an inverter circuit, a first compensation circuit and a transmitting coil; the receiving unit comprises a receiving coil, a second compensating circuit and a rectifying circuit. The power adjusting unit is used for adjusting an output signal of the wireless power transmission device. The control unit is used for acquiring the voltage and current phase difference of the transmitting unit, the detection signal and the power detection value of the wireless power transmission device; and the control unit is used for controlling the working frequency of the inverter circuit according to the voltage-current phase difference and a preset phase difference, enabling the voltage-current phase difference to be equal to the preset phase difference, generating a power derating signal according to the detection signal, and controlling the power regu