ELECTRIC CAR, IN-VEHICLE CHARGER OF ELECTRIC CAR, AND CONTROL METHOD FOR SAME

摘要

The present invention discloses an electric vehicle, a car charger for an electric vehicle and a control method thereof. The car charger includes: a charging contactor, a first end of which is configured for coupling to a first end of an alternating-current power source; an H bridge, including first and second alternating-current ends and first and second direct-current ends, where the first and second direct-current ends are configured for coupling to a power battery, the first alternating-current end is configured for coupling to a second end of the charging contactor, and the second alternating-current end is configured for coupling to a second end of the alternating-current power source; a first voltage sampling module, configured to sample a voltage of the first end of the charging contactor to obtain a first sampling voltage; a second voltage sampling module, configured to sample a voltage of the second end of the charging contactor to obtain a second sampling voltage; and a control module, configured to control the H bridge to perform an inversion operation when the alternating-current power source is coupled to the car charger such that the second sampling voltage has a synchronous phase and the same amplitude as the first sampling voltage, then control the charging contactor to pull in, and control the H bridge to perform a rectifying operation such that the alternating-current power source charges the power battery.