Detecting Inter-Turn Short-Circuit Fault in Induction Machine Using High-Order Sliding Mode Observer: Simulation and Experimental Verification

Abstract

In this article, a fault detection method is proposed for induction machine which suffers from inter-turn short-circuit fault. An induction machine mathematical model with considered fault is developed to study the fault impact. A high-order sliding mode observer is used to estimate rotor flux and three-phase stator current under healthy and faulty conditions. Based on measured and estimated three-phase stator currents comparison, a fault detection method is designed. This comparison produces sets of residuals sensitive to fault. The analysis of these residual signals is used to detect the stator windings damages. Simulation and experimental results are presented to validate the proposed fault detection scheme.