Initiierungs- und Abklingeffekte von elektrischen Schädigungsmechanismen im Wälzlager

Harder, André; Piske, Lukas; Neu, Marcel; Kirchner, Eckhard

doi:10.51202/9783181023785-65

Cited by 1 publication

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“…The investigations by Harder [17] and Joshi [18] show that rolling bearings have a higher susceptibility to current passage after the first electrical breakdown (initial breakdown). On the one hand, this may be due to the roughened surface caused by the initial damage, because the resulting roughness peaks mean that a homogeneous electric field can no longer be assumed between the contact partners, and breakdowns occur more quickly due to the field elevation there [17]. On the other hand, a chemical change in the lubricant due to the initial breakdown can also be decisive for the increased susceptibility to breakdown.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Load and Speed on the Initial Breakdown of Rolling Bearings Exposed to Electrical Currents

Puchtler,

Maier,

Kuhn

et al. 2023

Lubricants

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The reason for the failure of electric vehicle drives is increasingly current-induced damage to rolling bearings. Studies show that rolling bearings are more susceptible to current pass-through after the first occurrence of unwanted bearing currents. To investigate this effect, a test plan is introduced with variations in axial and radial loads, as well as rotational speeds. A new bearing is mechanically run-in for each test point and then subjected to a realistic voltage signal of gradually increasing amplitude. After the initial breakdown, the different voltage amplitudes are applied again to investigate the behavior after the initial breakdown. During the whole test, the maximum current, the duration and the dissipated energy of each breakdown are measured. The results provide insights into the processes after the initial breakdown and the stochastic nature of the breakdown behavior.

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Section: Introductionmentioning

confidence: 99%