A bridgeless power factor rectifier with soft-switching

This paper presents a bridgeless power factor correction rectifier with soft-switching. The proposed rectifier consists of a traditional rectifier diode bridge and a dc/dc power factor correction circuit, and an auxiliary circuit is used to achieve soft-switching. The auxiliary circuit can provide zero-voltage turn-on and zero-current turn-off for the main switch without any additional voltage or current stresses. The auxiliary switch is turned-off with zero-current switching, thus the switching losses and electromagnetic interference are reduced. Therefore, this circuit can improve the overall system efficiency. Finally, the proposed circuit is verified by computer simulation.