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Bearing Current and Shaft Voltage in Electrical Machines: A Comprehensive Research Review

Machines, 2023
The reliability assessment of electric machines plays a very critical role in today’s engineering world. The reliability assessment requires a good understanding of electric motors and their root causes.
Kotb B. Tawfiq, Mehmet Güleç, Peter Sergeant   +2 more
doaj   +5 more sources

The effect of end windings and the bearing labyrinth seals on stray capacitances and bearing voltage ratio of AC motors

IET Electric Power Applications, 2022
The bearing voltage brings premature failure of the motor bearings in the subway traction system, which is related to the stray capacitance of the motor.
Ruifang Liu, Qinqin Wang, Danan Sun, Xiaoji Huai   +3 more
doaj   +3 more sources

Design and Research of Intelligent Bearing Magnetic Coupling Piezoelectric–Triboelectric Composite Rotary Energy Harvester [PDF]

Sensors
To address the issue of insufficient output voltage of the self-powered unit of intelligent bearings under low-amplitude working conditions, a piezoelectric–friction composite energy harvester driven by rotating magnetic force is proposed based on the ...
Heng Wang, Wanru Sun, Zifei Li, Liucheng Zhu, Yuxuan Zhu, Haocheng Wang   +5 more
doaj   +2 more sources

Modelling and suppression of bearing voltage of wind turbine permanent magnet synchronous generators

IET Electric Power Applications
The problem of bearing current is common in wind power generation system, which leads to the attenuation of generator life and great economic losses. Bearing voltage of a 5.5 MW wind‐turbine permanent magnet synchronous generator is studied.
Lei Jia, Ruifang Liu, Zhihao Li, Shulin Li, Xin Huang   +4 more
doaj   +2 more sources

Influence of the Shielding Winding on the Bearing Voltage in a Permanent Magnet Synchronous Machine

Energies, 2022
This article presents selected methods of limiting the bearing voltages of synchronous machines with permanent magnets supplied from power electronic converters.
Sebastian Berhausen, Tomasz Jarek, Petr Orság   +2 more
doaj   +3 more sources

Review on Tribological and Vibration Aspects in Mechanical Bearings of Electric Vehicles: Effect of Bearing Current, Shaft Voltage, and Electric Discharge Material Spalling Current

Lubricants
Electric motors play a decisive role in electric vehicles by converting electrical energy into mechanical motion across various drivetrain components.
Rohan Lokhande, Sitesh Kumar Mishra, Deepak Ronanki, Piyush Shakya, Vimal Edachery, Lijesh Koottaparambil   +5 more
doaj   +3 more sources

Analysis of Traction Motor Bearing Voltage and Bearing Current Considering Whole-train Grounding and Suppression Measures

Chengshi guidao jiaotong yanjiu
Objective Most urban rail transit trains use PWM (pulse width modulation) variable frequency drive system, which often leads to bearing corrosion problems due to the excessive bearing voltage and bearing current during operation.
CHEN Zhi, ZHAO Wenjuan, YANG Xiangyan, CHEN Zhiwen, YANG Shaobing, SONG Kejian   +5 more
doaj   +2 more sources

Electrostatic discharge impacts on the main shaft bearings of wind turbines [PDF]

Wind Energy Science, 2023
This paper studies the electrostatic discharge effect in wind turbines, a possible trigger source of the main bearing current. A lab setup with a charge generator and downsized wind turbine was built to verify the impact of electrostatic discharge on the
J. Zhao, X. Xu, O. Carlson
doaj   +1 more source

Analysis of Impact of Design Solutions of an Electric Machine with Permanent Magnets for Bearing Voltages with Inverter Power Supply

Energies, 2022
The aim of the article is to present a new idea of limiting the bearing voltage in electric machines with permanent magnets through the use of a shielding winding placed in stator slot wedges.
Sebastian Berhausen, Tomasz Jarek
doaj   +1 more source

Influencing Factors on the Fluting in an Axial Ball Bearing at DC Bearing Currents

Lubricants, 2023
The effect of variable DC bearing current amplitude, bearing current polarity, mechanical force, rotation speed, bearing temperature, and number of the balls on the fluting in an axial ball bearing type 51208 is investigated under DC currents.
Omid Safdarzadeh, Resat Capan, Michel Werner, Andreas Binder, Oliver Koch   +4 more
doaj   +1 more source