Three-phase PFC soft start current impact suppression method and device, charger and medium

The invention provides a three-phase PFC soft start current impact suppression method and device, a charger and a medium. The three-phase PFC soft start current impact suppression method comprises the steps of: updating a direct current bus voltage instruction value according to a direct current bus voltage target value and a direct current bus voltage instruction value; carrying out loop calculation according to the updated direct current bus voltage instruction value to obtain a modulated wave signal of a three-phase PFC; acquiring a duty ratio of the three-phase PFC according to the modulated wave signal; and generating a PWM signal according to the duty ratio to drive the turn-off and turn-on of a power device of the three-phase PFC. According to the three-phase PFC soft start current impact suppression method and the device, the charger and the medium provided by the invention, on the premise of not increasing any hardware cost, the current impact at the start moment of the PFC can be effectively suppres