Circuits and Systems, 2016, 7, 835-848
Published Online May 2016 in SciRes. http://www.scirp.org/journal/cs
http://dx.doi.org/10.4236/cs.2016.76072
How to cite this paper: Madhanakkumar, N. and Sivakumaran, T.S. (2016) Performance Analysis of PI and Fuzzy Control for
Modified LCC Resonant Converter Incorporating Boost Converter. Circuits and Systems, 7, 835-848.
http://dx.doi.org/10.4236/cs.2016.76072
Performance Analysis of PI and Fuzzy
Control for Modified LCC Resonant
Converter Incorporating Boost Converter
N. Madhanakkumar
1
, T. S. Sivakumaran
2
1
Department of Electrical and Electronics Engineering, Anna University, Chennai, India
2
Department of Electrical and Electronics Engineering, Arunai College of Engineering, Tiruvannamalai, India
Received 17 March 2016; accepted 14 May 2016; published 17 May 2016
Copyright © 2016 by authors and Scientific Research Publishing Inc.
This work is licensed under the Creative Commons Attribution International License (CC BY).
http://creativecommons.org/licenses/by/4.0/
Abstract
In this paper, the modified LCC type of series-parallel Resonant Converter (RC) was designed and
state-space modeling analysis was implemented. In this proposed converter, one leg of full bridge
diode rectifier is replaced with Synchronous Rectifier (SR) switches. The proposed LCC converter
is controlled using frequency modulation in the nominal state. During hold-up time, the SR switches
control is changed from in-phase to phase-shifted gate signal to obtain high DC voltage conversion
ratio. Furthermore, the closed loop PI and fuzzy provide control on the output side without de-
creasing the switching frequency. The parameter such as conduction loss on primary and second-
ary side, switching loss, core and copper also reduced. Simultaneously, the efficiency is increased
about 94.79 is realized by this scheme. The proposed converter with an input of 40 V is built to
produce an output of 235 V with the help of ZVS boost converter [1] even under line and load dis-
turbances. As a comparison, the closed loop fuzzy controller performance is feasible and less sen-
sitive than PI controller.
Keywords
LCC Resonant Converter, Synchronous Rectifier (SR), Fuzzy Controller, PI Controller,
State-Space Modeling
1. Introduction
Today, researches have been made for DC-DC converter to improve the efficiency, power density with reduced
switching losses. Due to these increased power semiconductor switching losses, the soft-switching converters