Diagnosis of Short-circuits in Induction Motor Stator Winding Using a Modified Park Transformation

This paper deals with a novel diagnostic method of stator winding short-circuit damage for induction motor drives. The proposed method is based on a new, simple idea of applying a modified, triple Park transform, instead of using a computationally-demanding on-line FFT analysis. The diagnostic method is based on the analysis of current and ref-erence voltage vector components being a part of the Direct Field-Oriented Control structure. The proposed method is verified with experimental tests. The influence of speed, load torque and the parameters of PI regulators on the per-formance of the proposed diagnostic method is discussed as well.

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