Comparison between sigmoid variable reaching law and exponential reaching law for sliding mode controlled DC-DC Buck converter

In this paper presents a chattering analysis and steady state reaching speed are discussed. There are two approaches implemented to DC-DC Buck converter for minimizing the chattering and faster reaching speed. One is exponential reaching law and the other is sigmoid variable reaching law. In these approaches, Exponential Reaching law (ERL) gives better results than the Sigmoid Variable Reaching Law (SVRL). In ERL completely eliminates the chattering and more robust against load and line variations. The simulation results illustrate the feasibility and validity of the exponential reaching.