Improved Control Strategy on Buck-Boost Converter Fed DC Motor with Fuzzy Logic Controller

This paper presents comparison of the performance of Fuzzy Logic Controller with that of conventional closed loop controller for buck-boost converter fed dc motor based on voltage control method. For ac to dc conversion, diode bridge rectifier-chopper configuration gives higher input power factor than that of thyristor controlled rectifiers. So, one such configuration called ac-dc buck-boost converter feeding a dc drive is taken up for a detailed study in this paper. The performance of the proposed method is investigated using MATLAB simulation models of buck-boost converter fed dc motor