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Fuzzy Controlled Parallel AC-DC Converter for PFC

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Author(s): M Subba Rao | Ch Sai Babu | S Satyanarayana | P. V.S Sobhan

Journal: Advances in Electrical and Electronic Engineering
ISSN 1804-3119

Volume: 9;
Issue: 2;
Start page: 70;
Date: 2011;
Original page

Keywords: Flyback converter | PFC | power conversion | fuzzy control.

ABSTRACT
Paralleling of converter modules is a well-known technique that is often used in medium-power applications to achieve the desired output power by using smaller size of high frequency transformers and inductors. In this paper, a parallel-connected single-phase PFC topology using flyback and forward converters is proposed to improve the output voltage regulation with simultaneous input power factor correction (PFC) and control. The goal of the control is to stabilize the output voltage of the converter against the load variations. The paper presents the derivation of fuzzy control rules for the dc/dc converter circuit and control algorithm for regulating the dc/dc converter. This paper presents a design example and circuit analysis for 200 W power supply. The proposed approach offers cost effective, compact and efficient AC/DC converter by the use of parallel power processing. MATLAB/SIMULINK is used for implementation and simulation results show the performance improvement.
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