Abstract:

In order to increase the efficiency and reduce the electro-magnetic interference of single-stage PFC con-verter,the conventional Boost PFC converter was combined with the asymmetrical half-bridge DC/DC converter,thus forming a novel ZVS single-stage PFC converter by means of cascading integration technique.A prototype Was then produced to verify the efectiveness of the converter.The experimental results show that the proposed converter is of the advantages of simple topology,simple control and low cost.It can achieve hiSh PF,and,at the same time,achieve ZVS for all power switches.

Key words: single-stage PFC, soft-switching, asymmetrical half-bridge converter