In this article, the winding function method is modified to locate broken bars in squirrel-cage induction motors. Hence, saturation profile as an effective parameter on fault diagnosis accuracy is taken into account. Broken bars are detected for different distributions of broken bars over different motor poles. The influence of control techniques on locating broken bars is investigated in detail. The competency of the amplitude of the sideband components at frequencies (1 ± 2k)fs as common indices for broken bars recognition is studied in the controlled motor via the open-loop constant voltage/frequency and closed-loop direct torque control techniques.
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Faiz et al. (2012) studied this question.
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