Sliding mode control of power converters: DC/DC converters

ABSTRACT

In recent years, a lot of research efforts have been devoted to the application of sliding mode control (SMC) techniques to power electronic equipment and electrical drives. Hundreds of technical papers have been published in this research field. The tendency stems from the nature of sliding mode with discontinuous control actions and due to its potential for circumventing parameter variation effects along with low implementation complexity. This paper presents a control design procedure for DC/DC power converters. It develops SMC algorithms for several types of DC/DC converters with different control objectives, complete and incomplete information about system states. A chattering reduction approach for power converters based on the idea of multi-phase converters is also proposed. A wide range of MATLAB/SIMULINK computer simulations along with experimental results are provided to demonstrate the effectiveness of the proposed control design.

KEYWORDS:

• Power converter
• sliding mode control
• pulse-width modulation (PWM)
• chattering
• harmonic cancellation

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes

1. Formally, conventional Singular Perturbation Theory is not applicable for differential equations with discontinuous right-hand side. But, if sliding mode appears, sliding mode equations are in compliance with the conditions of the theory.