A High Efficiency Bridgeless PFC Circuit based on One Cycle Control Strategy

For the low efficiency of traditional Boost PFC circuit,this article chooses a high efficiency of power factor cor-rection(PFC) circuit based on one cycle control strategy,the advantages of this topology are the reduced circuit loss,the improved system efficiency.The circuit design is optimized and its common mode interference is reduced.For the high pre-cision of control system,this article selects a novel current sensing system through two current transformers to achieve the full input current.Results prove that this high-efficiency bridgeless Boost PFC circuit can achieve almost unity power fac-tor,very high efficiency,and the control method is simple and reliable.