WIRELESS CHARGING CONTROL METHOD, WIRELESS CHARGING TRANSMITTER AND SYSTEM

This application provides a wireless charging control method for an electric vehicle and a wireless charging transmitter and system. The transmitter includes an inner-loop control circuit, a boost circuit, an inverter circuit, and a transmitting coil, where the inner-loop control circuit is connected to both the boost circuit and the inverter circuit, and an input end and an output end of the inverter circuit are respectively connected to the boost circuit and the transmitting coil; and the inner-loop control circuit is configured to: obtain a first current reference signal and a sampled current signal of the transmitting coil; compare the first current reference signal with the sampled current signal to obtain an absolute value of a difference between the first current reference signal and the sampled current signal; and adjust a phase shift angle of the inverter circuit and/or a duty cycle of the boost circuit when the absolute value is greater than a preset deviation, so that after the adjustment, an absolute value of a difference between the first current reference signal and the sampled current signal of the transmitting coil is less than or equal to the preset deviation. In this way, a current adjustment range of the transmitting coil can be effectively expanded to reduce a power loss of a system.