High order sliding mode observer for inter-turn short-circuit fault detection in induction machine

This paper explores the design of high order sliding mode observer for induction machine fault detection. Inter-turn short-circuits is one of the most common fault occurring in induction machine. Healthy machine behavior and effects of such fault on the induction machine behavior are evaluated. This motivates the necessity of early fault detection. A high order sliding mode observer is developed and confirmed for different operating conditions. Detection method is based on calculating the difference between the actual behavior of induction machine and the expected behavior given by high order sliding mode observer. That produces a set of residuals sensitive to fault. Numerous simulations results are given to illustrate the effectiveness and performance of the proposed approach.