Results 241 to 250 of about 1,644,975 (282)

Calculation of Bearing and Common-Mode Voltages for the Prediction of Bearing Failures Caused by EDM Currents

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 ...
Andreas Binder, Oliver Magdun, Kersten Reis   +2 more
exaly   +2 more sources

Motor Shaft Voltages and Bearing Currents and Their Reduction in Multilevel Medium-Voltage PWM Voltage-Source-Inverter Drive Applications

IEEE Transactions on Industry Applications, 2000
This paper presents test results on problems and solutions of motor shaft voltages and bearing currents in medium-voltage pulsewidth modulated (PWM) drive systems. Tests show that multilevel medium-voltage PWM voltage-source inverter drives can cause motor bearing currents, similar to a low-voltage PWM drives, even with one motor bearing insulated ...
exaly   +2 more sources

A Review of Shaft Voltages and Bearing Currents in EV and HEV Motors

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
In most mechanical and electrical systems, reliability is paramount. Consumers, users and operators trust that their product will perform properly over its expected lifetime. Electric Vehicles (EVs) and Hybrid-Electric Vehicles (HEVs) are no exception to this statement.
Trevor Hadden, James Weisheng Jiang, Berker Bilgin, Yinye Yang, Anand Sathyan, Hossein Dadkhah, Ali Emadi   +6 more
openaire   +2 more sources

A complete excitation-shaft-bearing model to overcome the shaft induced voltage and bearing current

2011 2nd Power Electronics, Drive Systems and Technologies Conference, 2011
This 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, Mohammad Tavakoli Bina, Masoud Aliakbar Golkar, Mohsen Jokar   +3 more
openaire   +1 more source

A TDF Model in Induction Machines for Loose Bearing Diagnosis by Neutral Voltage

IEEE Transactions on Industrial Electronics, 2020
The bearing wear and looseness are significant failures in induction machines. For accurate recognition of the bearing faults, a new comprehensive modeling and analysis of induction machines with three degrees of freedom along with an effective method for loose bearing signature are presented in this article.
Mohammad Jafarian, Jalal Nazarzadeh
openaire   +1 more source

A Comprehensive Study on Shaft Voltages and Bearing Currents in Rotating Machines

IEEE Transactions on Industry Applications, 2018
This paper puts into perspective the state-of-the art knowledge on bearing currents and diagnosis tools, which rely on shaft voltages and bearing currents phenomena. Today, shaft signals measurements are progressively included in predictive health monitoring of large turbo and hydro generators. In addition, bearing fault diagnosis through shaft signals
Thierry Boileau, Thibaud Plazenet, Babak Nahid   +2 more
exaly   +2 more sources

Experimental Investigation of Bearing Currents in Low Voltage Motors

2018 XIII International Conference on Electrical Machines (ICEM), 2018
This 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
openaire   +1 more source

Research of Bearing Voltage and Bearing Current in Induction Motor Drive System

2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), 2016
To 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, Yongjian Zhi, Bingquan Zhu, Guanglin Yan, Yu Shi   +4 more
exaly   +2 more sources

Modeling, simulation and analysis of common mode voltage, bearing voltage and bearing current in PWM multilevel inverter fed induction motor with long cable

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, Basavaraja Banakara, Sharana Reddy   +2 more
openaire   +1 more source

Comparison of Frequency Responses of the Motors with Bearing Voltage Reduction Structures

2020 IEEE Energy Conversion Congress and Exposition (ECCE), 2020
This study presents the comparison of frequency responses of the motor with bearing voltage reduction structures. Since the bearing fault due to the electrical stress is significant issue in the field, various bearing voltage reduction structures were proposed.
Jun-Hyuk Im, Woo-Jong Kim, Jin Hur
openaire   +1 more source