Régulateur glissant de la Machine Asynchrone associé à l’onduleur NPC trois niveaux

Abstract

The control of systems in general is a complicated problem because of non-linearities, disturbance difficult to measure, and uncertainties in system parameters. When the system to be controlled is subjected to strong nonlinearities and to temporal variables, it is necessary to design control algorithms ensuring the stability and the robustness of the behavior of the process. The sliding mode adjustment is one of these robust control methods, it has undoubted advantages for the poorly identified system or with variable parameters. This thesis is devoted to the mathematical description of the sliding mode control which will be applied to the asynchronous machine for speed regulation. Thus, as long as the sliding conditions are ensured, the dynamics of the system remain insensitive to variations in process parameters, to modeling errors, and to certain disturbances.