Hanen Berriri

An Enhanced High Order Sliding Mode based Method for Detecting Inter-Turn Short-Circuit Fault in Induction Machine with Decoupled Current Control

This chapter is devoted to the exploitation of high order sliding mode for fault detection of inter-turn short-circuit in induction machine. For this purpose, healthy and faulty induction machine models are firstly established for different operating conditions during open loop control. The faulty model show the impact of inter-turn short-circuit on induction machine variables. Secondly, a high order sliding mode is synthesized to design decoupled current controller for induction machine and a closed loop induction machine dynamics are analyzed. The fault detection algorithm is combined actual induction machine behavior given by faulty model including fault occurrence and the behavior given by high order sliding mode observer to provide sensitive residuals, which exploited such fault indicators. This theoretical research prove that high order sliding mode approach have good capabilities to ensure both decoupled current control and inter-turn short-circuit fault detection.

High order sliding mode and an unknown input observers: Comparison with integral sliding mode control for induction machine drive

This paper presents a comparison study between high order sliding mode and unknown input observers performances which embedded in an integral sliding mode control scheme for induction machine drive. Both observers purpose is to estimate the machine states. Based on these states, an integral sliding mode controller is designed. The stability of the closed-loop system is shown by using the Lyapunov theory. A comparative simulation results are presented to show the effectiveness of both observers and performance of the controller, in terms of robustness, in low and high speed operation mode, with respect to machine resistances variations and load disturbance.