STABILITY ANALYSIS OF PROPORTIONAL INTEGRAL AND FUZZY CONTROLLER FOR MODIFIED RESONANT CONVERTER UNDER VARIOUS DISTURBANCES

n general, resonant converter can perform better in terms of reducing switching losses, high efficiency, less weight and high power density. In addition, operating regions of series Resonant Converter (SRC) is large when compared to parallel resonant converter (PRC) and series-parallel resonant converter. The main advantage of using a dual bridge resonant converter is to extend the output voltage range, high power density, high efficiency and widen soft switching ranges. The proposed resonant converter is dual bridge series resonant converter with dual tank circuit [1- 4] incorporating Proportional Integral (PI) and Fuzzy controller. The dual tank circuit can extend the ZVS region, so that switching loss can be reduced. In this paper, the stability analysis of the proposed system was obtained under the application of line and load disturbances.