Backstepping control for an induction motor using an adaptive sliding rotor-flux observer

Abstract This paper deals with the synthesis of a speed and flux control strategy for an induction motor drive based on an output feedback adaptive backstepping controller. The proposed strategy is asymptotically stable in the context of Lyapunov theory. The adaptive backstepping method takes into account the nonlinearities of the system in the design control law. The unavailable rotor flux is recovered by using an adaptive sliding rotor-flux observer provided with an adaptive mechanism of rotor resistance. Simulated and experimental results on a 1.5-kW squirrel-cage induction motor drive are displayed to validate the feasibility and the effectiveness of the proposed strategy.

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