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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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Current Practice in Journal Bearings
1969It is advantageous from the production point of view for a manufacturer to use one standard design of journal bearing, made in a small number of standard sizes. The degree of standardization attained is, however, limited by other considerations. The economic benefits of reduction of machine dimensions and of reduction of bearing loss justify the use of
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Traction Motor Bearing Failures Due to Bearing Currents in Electric Locomotives
2019 IEEE Transportation Electrification Conference and Expo (ITEC), 2019This paper is concerned with the analysis, measurement and mitigation methods for bearing current related bearing failures in inverter supplied electric locomotive traction motors. The motivation for the study is a record of premature bearing failures observed in AC traction motors in Indian Railways following a transition from GTO converters to IGBT ...
A. Sundaresan, Mukul Chandorkar
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The current state of bearing surfaces in total hip replacement
The Bone & Joint Journal, 2014We reviewed the literature on the currently available choices of bearing surface in total hip replacement (THR). We present a detailed description of the properties of articulating surfaces review the understanding of the advantages and disadvantages of existing bearing couples.
A, Rajpura, D, Kendoff, T N, Board
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Evaluation of Eddy-Current Effects on Diamagnetic Bearings for Microsystems
IEEE Transactions on Industrial Electronics, 2009Diamagnetic materials could be utilized with permanent magnets to offer a simple passive solution to micro bearings as a result of scale reduction. In this paper, we investigate the eddy-current effect on the performance of diamagnetic bearings. Due to the good electrical conductivity of some of diamagnetic materials or the intentionally introduced ...
Jie-Yu Chen +3 more
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Eddy current sizing of case depth in bearing components
NDT International, 1987Encircling eddy current coil techniques are being used for the nondestructive evaluation of case depth in bearing components (Figure 1). These techniques, because of their ability to measure only bulk properties in test specimens, lack the necessary spatial resolution to detect local variations in case depth leading to eddy current imaging of the case ...
R. Palanisamy, K. E. Jackson
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Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting., 2004
Statements on the mechanism of the endangerment of bearings due to inverter-induced bearing currents nearly do not exist today. Therefore, a series of 22 test runs for bearing damage assessment was carried out. The influence of bearing current amplitude and type, calculated apparent bearing current density, time of operation and inverter switching ...
A. Muetze +3 more
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Statements on the mechanism of the endangerment of bearings due to inverter-induced bearing currents nearly do not exist today. Therefore, a series of 22 test runs for bearing damage assessment was carried out. The influence of bearing current amplitude and type, calculated apparent bearing current density, time of operation and inverter switching ...
A. Muetze +3 more
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Experimental Investigation of an Eddy-Current Bearing
1989An AC-electromagnetic bearing based on eddy-current repulsion has been built and tested. The bearing was found to be inherently stable and able to provide support in five degrees of freedom, i.e. a short rotor was fully supported by a single bearing without any feedback control. However, with the current design configuration, the load carrying capacity
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