An equivalent internal circuit of the induction machine for advanced spectral analysis

The aim of this paper is to develop a method to validate an equivalent internal circuit of the induction machine for advanced signal processing including fault diagnosis. The proposed method is based on the computation of the stator and rotor current spectra. An experimental set-up for a 11 kW induction machine was developed in order to get numerical data for axial leakage flux, voltages and currents from the stator side. The comparison between the simulation, the analytical computation and the experimental results shows the model capability to reproduce the electromagnetic phenomena in the induction machine. The proposed model can be used to design electrical fault detection devices with low cost and non-invasive sensors.