This paper presents a new fault tolerant control (FTC) strategy for double star induction machine (DSIM) under stator and rotor faults. The proposed controller is developed in order to compensate the faults effect using a nonlinear backstepping controller combined with a novel fault detection and compensation block (FDCB) designed to on-line detect and compensate the faults. Simulation results are presented to show the effectiveness of the proposed FTC in terms of speed and flux responses using an estimator of rotor flux. Compared with backstepping control, the obtained results confirm the validity of the proposed FTC and its ability to ensure a ripple-free operation when the fault occurs.

Keywords: Double star induction machine, Backstepping control, Fault tolerant control, Rotor and stator faults, Faults detection and compensation