SIMULATION ANALYSIS OF PWM BASED SLIDING MODE CONTROLLER FOR DC-DC BUCK CONVERTER

Abstract

A voltage control loop with nonlinear control action is proposed for the buck type dc-dc converter which operates with continuous source current. The non -linear sliding-mode control technique is mainly acclimated to achieve less complex uniform control for buck converter operates in steady state as well as transient conditions. Instead of the suggested design methods, the output voltage should be provided to the control loop without the need for a synchronous capacitor for the proposed control scheme. As a result, the analog implementation value decreases and the difficulty of connecting the sensor in order to measure the capacitor current of the converter is eradicated. The equation of control action is accomplished using some op-amps and resistors in a simple analog circuit best suited for automated operations. Design and modeling of the proposed system are provided to facilitate the existence of system manipulation and the derivation of equilibrium conditions. The efficiency of buck converter with PI controller is around 96%, with SMC control is around 96%. The proposed work will be simulated in Matlab / Simulink software.