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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 +2 more
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Design and Research of Intelligent Bearing Magnetic Coupling Piezoelectric–Triboelectric Composite Rotary Energy Harvester [PDF]
SensorsTo 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 +5 more
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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
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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
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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 +4 more
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Energies, 2022 Pulse-width modulation (PWM) inverter drive systems are widely applied in industry for their great speed-control characteristics and performance. However, the common-mode voltage of the inverter induces motor bearing voltage and bearing current, which ...
Lei Yang +5 more
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Energies, 2022 The high frequency PWM voltage pulses from a two-level six-switch inverter produce a common-mode voltage in an electric machine’s windings, a fraction of which appears on the machine shaft due to electrostatic (capacitive) coupling.
Ryan Collin +2 more
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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 +3 more
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Shaft Voltage Reduction Method Using Carrier Wave Phase Shift in IPMSM
Energies, 2021 Common-Mode Voltage (CMV) induces shaft voltage and bearing current due to the electrical interaction with the parasitic capacitance of the motor. CMV, shaft voltage, and bearing current are considered the major causes of bearing fault.
Jun-Hyuk Im +3 more
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Shock and Vibration, 2017 Rotor stability and rotation accuracy, which are highly dependent on the dynamic coefficients of supporting hybrid bearings, are two important issues of high-speed water-lubricated spindles.
Lin Wang, Xianzhi Xiong, Hua Xu
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