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Three phase induction motors have many applications in industries. Consequently, detecting and estimating the fault and compensate it in a way that the faulty induction motor satisfies the predefined goals are important issues. One of the most common faults in induction motors is the short circuit of the stator winding. In this paper, an active fault-tolerant control system is designed and presented to compensate the effect of the short circuit fault in the stator of a three-phase induction motor. The introduced fault tolerant control system consists of an exponential unknown input observer to detect and estimate the fault. Also, based on the estimation results, control signals are made by employing a sliding mode controller to compensate the short circuit of the stator winding. The efficiency of the proposed system includes, fault detector, fault estimator and controller, is shown using simulation results.

Design of an Active Approach for Detection, Estimation and Short-Circuit Stator Fault Tolerant Control in Induction Motors