Robust control of switched power converters via sliding mode

Abstract

This paper presents a variable structure control approach for the output voltage regulation of switched power converters. The most outstanding feature of this control technique is its robustness towards load and line voltage disturbances. A control implementation for a basic down converter based on state-space transformation wholly confirms this performance. An extension to inverter control results in reduced harmonic distortion in case of uncertain load characteristics. Analytical predictions are verified by experimental results.