PROJECT TITLE :

Interleaved SEPIC Power Factor Pre-Regulator Using Coupled Inductors in Discontinuous Conduction Mode with Wide Output Voltage - 2016

ABSTRACT:

A power factor preregulator (PFP) sometimes is the first stage of a lively two-stage ac/dc converter in a very variety of applications as well as inductive heating systems, wireless charging systems, and onboard chargers for plug-in electrical vehicles. Conventionally, boost-kind PFPs are utilized to manage the dc-link voltage at a mounted voltage; but, a variable dc-link voltage will enhance the efficiency of the converters. During this paper, an interleaved single-ended primary inductor converter (SEPIC) with coupled inductors is proposed because the PFP stage for 2-stage ac/dc converters. The converter is designed to work in discontinuous conduction mode so as to realize soft switching for switches and diodes. The directly coupled inductors are utilised to cut back the amount of magnetic elements and decrease the input current ripple. A five hundred-W interleaved SEPIC PFP prototype is meant to verify the advantages of this converter. The experimental results show that the converter can maintain high efficiency over a wide range of dc-link voltage.