A pulsewidth modulation based integral sliding mode current controller for boost converters

Abstract

This paper proposes a fixed-frequency pulse-width-modulation based sliding mode current controller for boost converters. The aim of having such a nonlinear controller is to support the control applications of boost converters requiring a fast dynamical response over a wide range of operating conditions. The methods of modeling the system and translation of the sliding mode control equations for pulsewidth modulation implementation are illustrated. It is shown that the proposed controller is easily realized with simple analog circuitries. Experimental results are presented to validate the theoretical design and to illustrate the strength of the proposed controller in wide operating conditions.