Design and simulation of a fully soft-switched and bridgeless power factor correction circuit

Abstract

Dr Sevilay Cetin from Pamukkale University and Dr Haci Bodur from Yildiz Technical University, Turkey, present the design and operating principles of a fully soft-switched (SS) and bridgeless power factor correction (PFC) circuit. PFCs have been used in various industrial applications, such as uninterrupted and switched power supplies, electronic ballasts, electric vehicle, and battery charging solutions. A fully soft-switched and bridgeless PFC is one in which the boost switches turn on with zero-voltage transition (ZVT) and turn off with zero-voltage switching (ZVS). The auxiliary switch turns on with zero-current switching (ZCS) and turn off with ZVS, while the boost diodes and all other diodes work with SS. Most of the energy stored in the snubber inductor is transferred to the out by the transformer.