Surface analysis on rolling bearings after exposure to defined electric stress

T. Zika, I. C. Gebeshuber, F. Buschbeck, G. Preisinger, M. Gröschl

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This article gives an overview about classical and frequency converter-induced spurious bearing currents in induction machines and discusses typical damage patterns caused by the current passage. To investigate on the electric damage mechanisms, test bearings are operated in a test rig and exposed to specific (classical low-frequency, and high-frequency) bearing currents. The induced damages to the surfaces are analysed visually and with the help of an atomic force microscope, and compared for the different electric regimes applied. Further, the electrically damaged bearing surfaces are characterized by standard roughness parameters. The surface structure observable on certain test bearings shows good correlation to the structure found with a bearing that had failed in the field under similar electric conditions. One of the investigated electric regimes applying high-frequency currents proved capable of generating fluting patterns - as found in real applications - on the test rig. The experiments also indicate that high-frequency bearing currents, although in total dissipating less energy, are more dangerous to a bearing than continuous current flow. The presented method gives a good starting point for further investigation on electric current damage in bearings, especially regarding high-frequency bearing currents, and on bearing/grease lifetime under specific electric regimes.

Original languageEnglish
Pages (from-to)787-797
Number of pages11
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume223
Issue number5
DOIs
Publication statusPublished - 1 Aug 2009
Externally publishedYes

Fingerprint

Bearings (structural)
Surface analysis
damage
grooving
greases
Frequency converters
frequency converters
Lubricating greases
electric current
Electric currents
converters
Surface structure
induction

Keywords

  • Bearing currents
  • Common-mode voltage
  • Electric erosion
  • Fluting
  • Variable-speed drives

ASJC Scopus subject areas

  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Surface analysis on rolling bearings after exposure to defined electric stress. / Zika, T.; Gebeshuber, I. C.; Buschbeck, F.; Preisinger, G.; Gröschl, M.

In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, Vol. 223, No. 5, 01.08.2009, p. 787-797.

Research output: Contribution to journalArticle

Zika, T. ; Gebeshuber, I. C. ; Buschbeck, F. ; Preisinger, G. ; Gröschl, M. / Surface analysis on rolling bearings after exposure to defined electric stress. In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 2009 ; Vol. 223, No. 5. pp. 787-797.
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