Experimental research of influence of the load regimes on the spectrum of the stator current in the induction motor

Abstract

Experimental research of influence of the load regimes on the spectrum of the stator current in the induction motor

Burtsev A.G., Dyagileva T.V., Pan A.G.

Incoming article date: 13.03.2015

The article is devoted to the experimental investigation of the influence of load regimes on the spectrum of induction motor current . Spectrogram analysis allows to identify the presence of deterioration and to determine the operating mode of the induction motor. The experimental apparatus described in the paper allows to measure motor current oscillogram and calculate its spectrum. The appratus is based on PIC highspeed microcontroller. For current measuring the Hall sensor ACS712 is used. Several experiments are carried out in the research: without load, with load, with shaft beating imitaion. The analys of collected data has shown that the spectrums has some differences depends on the type of motor load. The research may be used for diagnostic system for inductor motors.

Keywords: Induction motor, current sensor, microcontroller, current spectrum, fast Fourier transform.