Effect of Voltage Frequency on the Formation of Electric Damage on Bearing Outer Race 核心 · 已核验

mxdsewmzpyrz8d49

Electrical erosion in high-frequency alternating current (AC) electric fields is the main failure mode of traction motor bearings in fields such as new-energy vehicles. The electrical damage on the outer race of bearings was produced from direct current (DC) to 1 MHz AC condition. The average friction coefficient increased from 0.019 to 0.097 and then decreased to 0.052. The equivalent contact resistance decreased to its minimum at 0.99 Ω then rose to 2.6 Ω. Three electric erosion morphologies were observed: pitting under DC and low frequency, fluting under resonance frequency (1 kHz) and frosting under high frequency. It was speculated that the frequency may affect the number of charge-discharge cycles of the bearing capacitance. This further affected the energy density of the bearing breakdown together with the current density, ultimately affecting the morphology of electrical corrosion.

本卡描述如含来自官方页的原文片段,其版权归原作者,不在本站 CC-BY 4.0 许可范围(见关于与许可)。

落地页

https://doi.org/10.57760/sciencedb.39285

许可证

CC-BY-NC-ND-4.0 (置信:verified_official)

国内可访问性

国内直连:直连超时(慢或不稳定,非封锁证据) (2026-07-11 检测) 非直连:可达 (2026-07-11 检测)
「直连超时」表示检测窗口内未完成,系慢或不稳定证据,不构成封锁证据。

设备类型

rolling_bearing

故障工况