Vibrations of induction machine excited by unbalanced magnetic pull caused by various rotor faults

Abstract

Experimental analyses of squirrel-cage induction machine vibrations under several rotor fault conditions causing unbalanced magnetic pull are carried out in the paper. These fault conditions include dynamic eccentricity, different number of broken rotor bars and one case of fault combination. Frequency vibration spectra of faulty operational states are compared to the one of healthy machine