Abstract
This paper introduces a diagnostic method for a Stator Internal Turn-to-Turn Fault (ITTF) in induction machine drives. Conventional Winding Function (WF) and Finite Element Method (FEM) are employed for modelling induction machines with the ITTF. The effects of machine slots, winding distributed types and different air-gap functions on machine inductance spectra are investigated. In the end, based on the theoretical and experimental analysis, the spectrum of the neutral-voltage is shown to be a proper approach for a hidden ITTF signature in Pulse Width Modulation (PWM) drives.
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