Determination of air-gap eccentricity in electric motors using coherence analysis

Author

Seker, Serhat

Author_Institution

Dept. of Electr. Eng., Istanbul Tech. Univ., Turkey

Volume

20

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

48

Lastpage

50

Abstract

This study addresses the detection of air-gap eccentricity based on hearing damage in 5 hp induction machines. The faulty condition of the bearing is caused by accelerated aging processes in seven aging cycles. For the faulty case, the spectra of vibration signals are computed for initial and final aging processes under 100% load condition. Subsequently, the spectra of the current signals for a single phase are also obtained for the initial and aged cases and cross-power spectral coherences between the vibration and current signals are computed

Keywords

ageing; air gaps; fault location; machine bearings; spectral analysis; squirrel cage motors; vibration measurement; 5 hp; accelerated aging processes; aging cycles; air-gap eccentricity detection; bearing faulty condition; coherence analysis; cross-power spectral coherences; current signals; load condition; single phase; squirrel cage induction motors; vibration signals spectra; Accelerated aging; Air gaps; Contacts; Electric motors; Electronic mail; Frequency; Signal processing; Stator windings; Substations; Voltage control;

fLanguage

English

Journal_Title

Power Engineering Review, IEEE

Publisher

ieee

ISSN

0272-1724

Type

jour

DOI

10.1109/39.850436

Filename

850436