Sliding Mode-Based Active Fault-Tolerant Control for Induction Machine

This paper proposes an induction machine stator inter-turn short-circuit fault diagnosis and tolerance based on sliding mode. A Lyapunov stability-based integral sliding mode control is designed and kept in a healthy and faulty case. An online diagnosis using a high-order sliding mode observer allows the fault detection and phase identification on the one hand and provides signal alarm on the other. When the fault overcome such level, the proposed control cannot deal with the inter-turn short-circuit fault. So, it should be reconfigured. The signal alarm triggers the switch between affected stator current and healthy reconstructed ones. Then, fault impact will compensate and the integral sliding mode control still achieves the objectives. The simulation results are presented to illustrate the proposed fault-tolerant design.