Fuzzy Logic Controller based Interleaved PFC Power Factor Correction with Output Voltage

Abstract

A power factor Correction (PFC) usually serves as the first stage of active two-stage AC/DC converters in a variety of applications including inductive heating systems, wireless charging systems, and onboard chargers for plug-in electric vehicles (PEVs). Conventionally, boost-type PFCs are utilized to regulate the DC-link voltage at a fixed voltage; however, a variable DC-link voltage can enhance the overall efficiency of the converters. In this paper, Fuzzy Logic Control based interleaved PFC converter with coupled inductors is proposed as the PFC stage for two-stage AC/DC converters. The converter is designed to operate in discontinuous conduction mode (DCM) in order to achieve soft switching for switches and diodes. The directly coupled inductors are utilized to reduce the number of magnetic components and decrease the input current ripple. A 500W FLC Based interleaved PFC Converter is designed to verify the benefits of this converter. The MATLAB/SIMULINK results show that the converter can maintain high efficiency over a wide range of DC-link voltage and input power factor maintaining approximately at unity.