RECEIVING AND SENDING FOR A LOWER-LOADING, PROCESSING, ELECTRICAL ENGINE AND LOWER-LOADING SYSTEM

摘要

A receive end and a transmit end of a wireless charging system, a method, an electrical terminal, and the system are disclosed. The receive end includes a receive coil, a receive end compensation circuit, a rectifier, and a controller. The controller adjusts a phase difference between a first bridge arm and a second bridge arm of the rectifier, and adjusts a phase-shift angle between a bridge arm voltage of the rectifier and a fundamental component of an input current of the rectifier, so that zero-voltage switching is implemented for controllable switching transistors of the rectifier. An amplitude of a fundamental component of the bridge arm voltage is adjusted by adjusting the phase difference between the two bridge arms of the rectifier, so that a real part of an equivalent impedance of the rectifier is adjusted. The equivalent impedance of the rectifier includes the real part and an imaginary part. The real part is a resistance, and the imaginary part is a reactance. When the imaginary part of the equivalent impedance of the rectifier is quite small, the equivalent impedance of the rectifier may be considered as a purely resistive impedance, and a ZVS effect can be achieved for the controllable switching transistors. An inductance compensation module may weaken a capacitive part of the equivalent impedance, and reduce reactive power of the wireless charging system, thereby improving system efficiency of the wireless charging system.