Stator Core Fault Diagnosis in Induction Motor Using Adaptive Observer

This document presents a method of on-line fault diagnosis for iron core of induction motor stator based on adaptive observer. Due to the equivalent resistance is directly affected by the stator core fault, while the iron loss is considered in the series iron loss model of the induction motor, so we can determine the core fault state by identifying equivalent iron consumption resistance. In this paper, Matlab LMI toolbox is employed to calculate the feedback gain matrix of adaptive observer, which can makes up the deficiency of other method such as pole assignment. Finally, the experimental results confirm the validity of the proposed approach. Copyright © 2014 IFSA Publishing, S. L.