PHASE CALIBRATION CIRCUIT AND METHOD FOR RECEIVING END, AND RECEIVING END

This application discloses a phase alignment circuit and method of a receive end, and a receive end, where the phase alignment circuit and method of a receive end, and the receive end are applied to an electric vehicle. The receive end is located on the electric vehicle. The circuit includes: a phase measurement circuit and a controller. A first input end of the phase measurement circuit is connected to an output end of a current detection circuit, and a second input end of the phase measurement circuit is connected to an output end of a filter. The current detection circuit is configured to detect an input current of a rectifier. The filter is configured to filter the input current to obtain an input current fundamental component. The phase measurement circuit is configured to obtain a difference between a phase of the input current and a phase of the input current fundamental component. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting the phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased.