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Characteristics of Shaft Voltage and Bearing Currents
IEEE Industry Applications Magazine, 1997This article reviews investigations into reduced bearing life due to voltage source adjustable speed drive (ASD) AC motor operation. Relevant bearing failure mechanisms and indicators are discussed. dv/dt and electric discharge machining (EDM) contributions are discussed and experimental data presented showing the voltage levels on motor shafts when ...
Dave Busse +4 more
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Research of bearing voltage and bearing current in induction motor drive system
2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), 2016To solve bearing electric corrosion of motor drive system, the mechanism of bearing voltage and bearing current is studied. To validate the mechanism, the motor driven by high frequency PWM pulse system is established. The model of drive system based on MATLAB/SIMULINK is introduced.
Zhuxia Fan +4 more
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Study on effect of neutral voltages on shaft voltages causing bearing currents
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013This paper investigates that effect of neutral voltage on shaft voltages. The shaft voltages are expected to provide cause of bearing currents. The bearing currents damage bearing in motor. We expect neutral voltages to cause shaft voltages. Thus, we construct circuit of interior motor.
Takuya Katayama +5 more
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Experimental Investigation of Bearing Currents in Low Voltage Motors
2018 XIII International Conference on Electrical Machines (ICEM), 2018This paper deals with bearing currents phenomena in general and specifically for capacitive bearing currents in low voltage motors. With the technological advances in the automation field, new problems have also surfaced and bearing currents in small motors is one of such issues.
Kashif Khan, Freddy Gyllensten
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An overview of shaft voltages and bearing currents in rotating machines
2016 IEEE Industry Applications Society Annual Meeting, 2016Shaft voltages and associated "shaft currents" or "bearing currents" have been known since more than a century on DC and AC motors under classical line operation. More recently with the emergence of inverter drives, there has been an increase of high-frequencies bearing currents and shaft voltages creating mainly premature failure of bearings. Although
Plazenet, Thibaud +3 more
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Measuring of electrical currents, voltage and resistance of an axial bearing
2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), 2021Bearing currents induced in electrical motors driven with fast switching power electronic inverters lead to bearing surface damages on the raceway. This may be the case especially when the rotor is electrically connected to the earth potential of the system e.g. via the cogging wheels of a coupled gear.
Omid Safdarzadeh +2 more
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A complete excitation-shaft-bearing model to overcome the shaft induced voltage and bearing current
2011 2nd Power Electronics, Drive Systems and Technologies Conference, 2011This paper proposes a complete distributed model for investigating the induced shaft voltage and bearing current in turbo generators due to the interaction with the static excitation systems. This undesirable voltage affects the insulations gradually, lowering the life expectancy of the whole system.
Reza Kazemi Golkhandan +3 more
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2017 2nd IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology (RTEICT), 2017
Adjustable Speed Drives (ASDs) are extensively used in industrial Heating, Ventilation and Air Conditioning (HVAC) equipments. As they offers several advantages in control and energy efficiency. The ASDs use PWM inverter with high speed switching devices such as IGBTs generates the common mode voltage (V cm ). This V cm causes the bearing voltage (V b
P.M Sunitha +2 more
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Adjustable Speed Drives (ASDs) are extensively used in industrial Heating, Ventilation and Air Conditioning (HVAC) equipments. As they offers several advantages in control and energy efficiency. The ASDs use PWM inverter with high speed switching devices such as IGBTs generates the common mode voltage (V cm ). This V cm causes the bearing voltage (V b
P.M Sunitha +2 more
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Adaptive sliding-mode based voltage-controlled active magnetic bearing system
IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468), 2004This paper deals with the control problem for an active magnetic bearing system. An adaptive sliding mode control algorithm which does not need the knowledge of system parameters is presented. Besides the controller can tolerate high-speed rotational disturbance without performance degradation.
null Jung-Hua Yang +1 more
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8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives, 2011
The paper deals with the calculation of the common-mode (CM) voltage and the electrostatic induced voltage across the bearings in the small power inverter-fed AC machines with wound round wire windings. A method for the calculation of the bearing voltage directly from the CM voltage at the neutral point has been previously proposed in the literature ...
Oliver Magdun +3 more
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The paper deals with the calculation of the common-mode (CM) voltage and the electrostatic induced voltage across the bearings in the small power inverter-fed AC machines with wound round wire windings. A method for the calculation of the bearing voltage directly from the CM voltage at the neutral point has been previously proposed in the literature ...
Oliver Magdun +3 more
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