Implementation of Pulse-Width-Modulation based Sliding Mode Controller for Semi-Quadratic Buck-Boost DC/DC Converter

Abstract

This research discusses the robust performance of a semi-quadratic buck-boost converter with a sliding mode (SM) controller. It is a non-linear control strategy having a lot of advantages of easy implementation and giving better dynamic response against load perturbation. A detailed examination of the stability of the control system in the closed-loop configuration is carried out, along with the derivation of an equivalent control signal for the recommended sliding mode controller. This approach utilizes the input-output linearization technique and the equivalent control method to define the boundary layers encompassing the sliding surface. A comparison of this proposed controller with a conventional PID controller is also done. The MATLAB simulation outcomes are showcased to demonstrate and exemplify the proposed methodology.