Sliding mode control of DC-to-DC power converters

Abstract

In this paper, we study the behavior of a current-mode-controlled boost converter and exhibit its chaotic behavior. We then introduce a practical method (sliding mode control) aiming at eliminating this chaotic behavior. We establish a mathematical modeling of the whole circuit (closed-loop) and study its performance. Finally, simulation results clearly show the disappearance of the instability. This control method does not only provide stability, it also increases the input voltage variation domain for which the system remains stable.