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Overview of Bearing White Etching Cracks due to Electrical Currents
, 2021 International audienceWith the development of variable speed drives, motor bearings are submitted to additional stress due to parasitic currents which deteriorate bearing raceways, rolling elements and lubricant.
Boileau, Thierry +3 more
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Novel stator slot opening to reduce electrical machine bearing currents [PDF]
, 2023 Ball bearings are largely used in electrical machines, where the high frequency common mode currents affect their lifetime. This document presents a novel Zig-Zag stator slot opening geometry to reduce the winding-to-rotor capacitance Cwr with the ...
Geraint W. Jewell +11 more
core +1 more source
Energies, 2019 Wind energy integration in power grids is increasing day by day to reduce the use of fossil fuels, and consequently greenhouse gas emissions. Using the pulse-width modulated (PWM) power converters in wind turbine generators, specifically in doubly-fed ...
Amr. S. Zalhaf +2 more
doaj +1 more source
Electrical Bearing Damage, A Problem in the Nano- and Macro-Range
Lubricants, 2022 Rolling bearings face different damaging effects: Besides mechanical effects, current-induced bearing damage occurs in electrical drive systems. Therefore, it is of increasing interest to understand the differences leading to known electrical damage ...
Volker Schneider +9 more
doaj +1 more source
Active Magnetic Bearing Design Optimization and Transient-State Analysis Using ANSYS [PDF]
Engineering and Technology Journal, 2010 This paper presents design optimization, and transient-state analysis ofactive magnetic bearings (AMB) using the powerful ANSYS software package.ANSYS software provides the required environment for numerical modeling andanalysis based on the finite ...
Adil H. Ahmed, Thamir M. Abdul Wahab
doaj +1 more source
The Hard on Hard Bearings in THA – Current concepts [PDF]
Journal of Orthopaedics, 2014 Total hip arthroplasty has been one of the most successful inventions of the last century with useful results in decreasing pain and improving function in patients with degenerative disease of the hip. Improvements in prosthetic materials, designs and implant fixation have now resulted in wear of the bearing surface being the limitation of this ...
openaire +2 more sources
Time-frequency vibration analysis for the detection of motor damages caused by bearing currents [PDF]
, 2015 International audienceMotor failure due to bearing currents is an issue that has drawn an increasing industrial interest over recent years. Bearing currents usually appear in motors operated by variable frequency drives (VFD); these drives may lead to ...
Razik, Hubert +3 more
core +2 more sources
Electrical bearing failures in electric vehicles
Friction, 2020 In modern electric equipment, especially electric vehicles, inverter control systems can lead to complex shaft voltages and bearing currents. Within an electric motor, many parts have electrical failure problems, and among which bearings are the most ...
Feng He, Guoxin Xie, Jianbin Luo
doaj +1 more source
Adélie penguin foraging location predicted by tidal regime switching. [PDF]
PLoS ONE, 2013 Penguin foraging and breeding success depend on broad-scale environmental and local-scale hydrographic features of their habitat. We investigated the effect of local tidal currents on a population of Adélie penguins on Humble Is., Antarctica.
Matthew J Oliver +6 more
doaj +1 more source
Mitigation of inverter-induced noncirculating bearing currents by introducing grounded electrodes into stator slot openings [PDF]
, 2020 Modern converter-supplied AC motors are exposed to bearing currents. Despite extensive research and development, the industry still does not have a final solution with acceptable cost and high efficiency. This paper focuses on capacitive bearing currents.
Pyrhönen, Juha +4 more
core +1 more source