An induction motor sensor fault detection and isolation based on higher order sliding mode decoupled current controller

This paper presents a novel decoupled current-control method for induction motor (IM) based on higher order sliding mode (HOSM) controller. In the proposed scheme, the decoupled control of d - q currents does not require the knowledge of the speed. The HOSM controllers play the same role as the compensation voltages produced by a decoupling compensator. Based on this observation, the speed is estimated accurately through algebraic calculations by avoiding the low-pass filtering. The estimated speed is then employed for fault detection and isolation. Simulations on a 1/4-hp three-phase IM in the presence of noise highlights the performance of the proposed approach.

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