Design and Analysis of PI like Fuzzy Logic Controlled Buck Converter

This paper presents a novel design of Proportional and Integral (PI) like Fuzzy Logic Controller (FLC) for Buck converters that integrates linear control techniques with Fuzzy Logic .The design procedure allows the small signal model of the converter and linear control design techniques to be used in the initial stages of FLC design. This simplifies the small signal design and stability assessment of the FLC.By exploiting the Fuzzy Logic structure of the controller, heuristic knowledge is incorporated in the design, which results in a nonlinear controller with improved Performance over linear PI controllers. The major advantage of the proposed design method for FLC is that compared to other methods is trial and error effort in the design is greatly reduced. MATLAB/SIMULINK is used for implementation and results shows the performance of the converter.