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The Influence of Lubricant Conductivity on Bearing Currents in the Case of Rolling Bearing Greases

Institute of Machine Elements, Gears and Transmissions, University of Kaiserslautern, 67663 Kaiserslautern, Germany
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Lubricants 2019, 7(12), 108; https://doi.org/10.3390/lubricants7120108
Received: 31 October 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 / Published: 4 December 2019
(This article belongs to the Special Issue Selected Papers from the 60th German Tribology Conference 2019)
In the course of increasing electric mobility, the effect of electricity on parts of machines is more significant than before. Rolling bearings and their lubrication, as a part of electric motors, are subjected to harmful currents, which lead to damage in the bearing in the long term. In order to avoid such damage, the influence of the lubricant in the bearing is becoming increasingly important. The electrical behaviour of the system can be investigated by analysing the discharge currents and the breakdown voltage in rolling bearings with lubricants of different compositions. This paper presents a procedure for characterizing the breakdown voltage at the rolling bearing and the influence of conductivity of the lubricants on harmful electrical phenomena.
Keywords: EDM; breakdown voltage; bearing currents; electrical properties of greases EDM; breakdown voltage; bearing currents; electrical properties of greases
MDPI and ACS Style

Gonda, A.; Capan, R.; Bechev, D.; Sauer, B. The Influence of Lubricant Conductivity on Bearing Currents in the Case of Rolling Bearing Greases. Lubricants 2019, 7, 108.

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