A sliding mode variable structure controller for Buck converter

This paper discussed sliding mode variable structure control theory on buck converter in detail, designed a sliding mode controller based on PWM technology. This method solved the problem perfectly that the performance of sliding mode variable structure controller is influenced by switching frequency of buck converter, and the switching frequency is fixed. Experimental results show that the proposed method can effectively improve the accuracy and dynamic response of Buck converter and enhance its robustness to load mutation and input voltage fluctuation.