Real-Time Implementation of Sliding Mode Controller for Buck Power Converter using DSpace 1104

Abstract

This paper deals an experimental validation of a nonlinear controller using a sliding mode control (SMC) with integral action for a dc-dc buck power converter. The main control objectives are: i) perfect regulation of inductor current with unknown load resistance variation, ii) and ensure the asymptotic stability of the closed-loop system. To this end, a SMC with integral action is elaborated. Using Matlab-Simulink software, numerical simulations are carried out to show the effectiveness of the proposed approach. Furthermore, using an experimental test bench, the real-time controller is developed based on the Dspace 1104 card in real time (RT). It was shown, using formal analysis, simulations and experiments, that the controller achieves all desired performances.

Keywords

• buck power converter
• real-time control (rtc)
• non-linear control
• sliding mode controller (smc)
• dspace 1104 card
• matlab-simulink