Effects of modified modulation strategies on bearing currents and operational characteristics of AC induction machines

Zitzelsberger, J.; Hofmann, W.

doi:10.1109/iecon.2004.1432294

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Static and Dynamic Rotor Eccentricity Of Three-phase Inducti1

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Cited by 4 publications

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“…One differentiates between static and dynamic rotor eccentricity. Some phenomena related to rotor imbalance are issues of shaft flux and the associated bearing currents [88,89]. Dynamic rotor eccentricity occurs when the rotor axis rotates around a small circle within the stator bore.…”

Section: Static and Dynamic Rotor Eccentricity Of Three-phase Inductimentioning

confidence: 99%

Modeling and Analysis of Induction Machines

Masoum¹,

Fuchs²

2015

Power Quality in Power Systems and Electrical Machines

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Section: Static and Dynamic Rotor Eccentricity Of Three-phase Inductimentioning

confidence: 99%

Modeling and Analysis of Induction Machines

Masoum¹,

Fuchs²

2015

Power Quality in Power Systems and Electrical Machines

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A Review of Modeling and Mitigation Techniques for Bearing Currents in Electrical Machines With Variable-Frequency Drives

et al. 2022

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The converter switching in variable-frequency drives can generate high frequency common mode voltage between the machine winding and the converter ground, leading to high frequency parasitic currents which can flow through the machine bearings unless precautions are taken in design and installation. These parasitic and unintended currents in the bearings cause deterioration of the lubrication film and surface damage to the rolling elements of the bearings. These problems will be exacerbated as wide-bandgap semiconductors with faster switching rise times start becoming more widespread in variable-frequency drives. This paper reviews the modelling and mitigation techniques of high frequency bearing currents in inverter fed AC drives. It aims to provide a solid base for the research community to further understanding the bearing currents phenomenon and helping to find novel improved technique for their mitigation and measurement.

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