Closed Loop Control of an Isolated semi-SEPIC DC-DC Converter using PID Controller

Abstract

This paper presents the closed loop control scheme of the semi-sepic coupled inductor based DC DC converter using a PID controller, enhancing the overall performance of the system. The PID controller usually enhances the transient and steady state performance of the system. The objective here is to maintain the output voltage of the DC/DC converter constant irrespective of the variations in the input/source voltage, components and load current. The implementation of the proposed scheme is done using the blocks of MATLAB Simulink and the model is tested with the controlled voltage source by giving some disturbance at the input where the output is well regulated irrespective of the changes in the input/source voltage. Comparative analysis on the performance of the converter with and without PID controller is carried out using MATLAB Simulink. The output voltage of the converter with PID controller is regulated under disturbed input voltages.