Bearing damage analysis in a large oil-ring-lubricated induction machine

Author

Ong, Raymond ; Dymond, J.H. ; Findlay, Raymond D.

Author_Institution

GE Ind. Syst., Peterborough, Ont., Canada

Volume

47

Issue

5

fYear

2000

fDate

10/1/2000 12:00:00 AM

Firstpage

1085

Lastpage

1091

Abstract

In this paper, an alternative method of online detection capable of discerning machine failure modes resulting in shaft current is proposed. The relationship between shaft current and fault conditions such as asymmetrical flux due to joints in the lamination segments, broken rotor bars, air-gap eccentricity, saturation, and slot harmonics are investigated. The diagnostic equipment used in the investigation of a three-phase medium-voltage squirrel-cage induction machine is described. The experimental results using the alternative method of online detection of shaft current are presented

Keywords

electric current measurement; fault diagnosis; laminations; lubrication; machine bearings; machine testing; rotors; squirrel cage motors; Rogowski transducer; air-gap eccentricity; asymmetrical flux; bearing damage analysis; broken rotor bars; fault conditions; lamination segments joints; machine failure modes; medium-voltage squirrel-cage induction machine; oil-ring-lubricated induction machine; saturation; shaft current; slot harmonics; three-phase; Air gaps; Circuit testing; Induction machines; Lamination; Lubrication; Magnetic flux; Petroleum; Rotors; Shafts; Voltage;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.873217

Filename

873217