Spectral analysis of the stator current three-phase induction motor in emergency mode
Abstract
Spectral analysis of the stator current three-phase induction motor in emergency mode
Incoming article date: 04.05.2015The experiments by obtaining 3-phase stator current oscillograms under different emergency regimes are described in article. For this purpose an experimental equipment has been used. It included current sensor, multi-channel ADC board, special block for emergency regime simulation and computer. For data processing MathCAD soft has been used. With Fast Fourier Transform algorithm the spectrum graphs were built. Analyse of spectrums showed the differences in odd harmonics between ordinary and any of emergency regime. For analyse the 0-1 kHz frequency range was taken. The research has shown that this technique can be used in diagnostics of 3-phase motors. General algorithm for real-time diagnostic system is developed.
Keywords: Three-phase induction motor, the current sensor, spectral analysis, harmonic, fast Fourier transform