Comparison of Filter with Fuzzy Controlled Three Level DC-DC Converter Fed Drive

Abstract

A simple Fuzzy logic controller (FLC) applied to buck converter is presented in this paper. This approach uses FLC which performs better when compared with the conventional PI controllers. In proposed buck converters, high voltage dc supply is switched at very high frequency and inductively transferred to dc load via a high frequency transformer and rectifier. In this converter four power switches are connected in series to primary of high frequency transformer for large load currents. To achieve large step-down voltage ratios the power switches are turned ON and OFF alternatively with a time gap. The voltage step-down ratios, Total Harmonic Distortion and angular velocity of drive are the parameters to be analyzed. The comparison with the original FLC and comparison of three level DC-DC converter with capacitor and pi filter is carried out by MATLAB-Simulink simulation and Model is designed to verify the proposed method performance.