Research on Zero-Crossing Distortion Suppression Strategy for Totem-Pole Bridgeless PFC Converter

In the totem-pole bridgeless PFC converter, zero-crossing distortion occurs because the duty cycle signal cannot be properly controlled. To eliminate this phenomenon, this paper proposes a feedforward control strategy based on duty cycle compensation. By introducing a duty cycle feedforward mechanism into the control system, the duty cycle signal is effectively compensated, thereby enhancing the accuracy of control. Finally, the proposed method is validated on an experimental platform of a 1500 W totempole bridgeless power factor correction (TBPFC) converter, confirming the effectiveness of the proposed approach.