Flatness and trajectory tracking in sliding mode based regulation of DC-to-AC conversion schemes

A DC-to-AC power conversion scheme is presented which uses conventional DC-to-DC switched power converters. The proposed feedback controller is based on an indirect sliding mode inductor current tracking scheme for a suitable off-line generated reference trajectory, thus circumventing non-minimum phase problems associated with the regulation of the output capacitor voltage variable. The inductor current reference trajectory is generated by means of an iterative functional approximation algorithm placing the required input current in terms of the desired output voltage trajectory and an indefinite number of its time derivatives