Robust voltage-mode controller for DC-DC boost converter

Abstract

In this study, a robust voltage-mode controller for DC-DC boost converter subject to time varying parameters is presented. The time-varying parameters of the boost converter are considered as the input voltage, the load resistance and the passive components (inductor and capacitor). The proposed controller, designed in discrete time, is based on the sliding mode control combined with the model-reference approach. In addition to this controller structure, the system dynamics are augmented by integral action to ensure zero steady-state tracking error. Experimental results, obtained from prototype operating at the fixed frequency, are provided to demonstrate the excellent robustness of the designed controller against wide input voltage variations and large load transients and also variation in passive components.