| 摘要 |
The present invention discloses a circuit, including a first bridge arm unit, a second bridge arm unit, a third bridge arm unit, a fourth bridge arm unit, a first capacitor, and a second capacitor, where: the first bridge arm unit is configured to input a first-phase alternating current of a three-phase power supply, the second bridge arm unit and the third bridge arm unit are configured to input a second-phase alternating current of the two-phase power supply, and the fourth bridge arm unit is configured to input a third-phase alternating current of the three-phase power supply. In alternating current working mode, the first capacitor and the second capacitor are charged by turning on the switching transistor of the second bridge arm unit and the switching transistor of the third bridge arm unit alternately, thereby reducing ripples of the capacitor; in battery working mode, the second bridge arm unit and the third bridge arm unit can still charge the capacitor, and no component of the circuit is idle, thereby improving usage of components. |
