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Sliding mode controller with modified sliding function for buck type converters

This paper discusses about the application of sliding mode control to the buck converter with modified sliding function. The modified sliding function allows a degree of freedom to determine the dynamic behaviour of overall system. The modification in sliding function leads to tracking of reference with negligible steady state error. The existence region on the phase plane where sliding mode occurs is discussed and analysed. The superiority of the controller over the conventional sliding mode controller is demonstrated by the simulation results.