Variable Structure Control of buck converter based on inverse system

Abstract

In order to increase the precision and simplify the process, a novel control strategy was proposed for the buck converter, which is based on the inverse system method aiming at the nonlinear identity of the mathematic model of the buck converter using the state-space average modeling method, a pseudo-linear model is given based on the inverse system method, then a Variable Structure Controller is designed to meet some performance index in terms of the pseudo-linear system. Through comparing the simulation performance with the method this paper proposed and the exited methods, it shows excellent starting-up response and strong robust to the disturbance of the input voltage and load, and the design process of the controller was simplified for a really application.