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

Plazenet, Thibaud; Boileau, Thierry; Caironi, Cyrille; Nahid‐Mobarakeh, Babak

doi:10.1109/tia.2018.2818663

Cited by 139 publications

(59 citation statements)

References 90 publications

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“…Figure 3(a) shows the simplified physical schematic and corresponding circuit models of an induction electric motor, and the possible current paths caused by different voltage sources are also very complicated. As for the current sources, bearing currents can be divided into "circulating" and "non-circulating" [60,61].…”

Section: The Generation Of Bearing Currentsmentioning

confidence: 99%

Electrical bearing failures in electric vehicles

2020

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In modern electric equipment, especially electric vehicles, inverter control systems can lead to complex shaft voltages and bearing currents. Within an electric motor, many parts have electrical failure problems, and among which bearings are the most sensitive and vulnerable components. In recent years, electrical failures in bearing have been frequently reported in electric vehicles, and the electrical failure of bearings has become a key issue that restricts the lifetime of all-electric motor-based power systems in a broader sense. The purpose of this review is to provide a comprehensive overview of the bearing premature failure in the mechanical systems exposed in an electrical environment represented by electric vehicles. The electrical environments in which bearing works including the different components and the origins of the shaft voltages and bearing currents, as well as the typical modes of electrical bearing failure including various topographical damages and lubrication failures, have been discussed. The fundamental influence mechanisms of voltage/current on the friction/ lubrication properties have been summarized and analyzed, and corresponding countermeasures have been proposed. Finally, a brief introduction to the key technical flaws in the current researches will be made and the future outlook of frontier directions will be discussed.

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Section: The Generation Of Bearing Currentsmentioning

confidence: 99%

Electrical bearing failures in electric vehicles

2020

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“…Some possible causes, such as electric corrosion, lubricant impurities, misalignment in assembly and the overall vibration, may lead to cracks, pits, and spalls on the rolling surface [34]. Among all the above root causes of bearing faults, the shaft voltages and the associated bearing currents are the most common causes of accelerated bearing degradation [5].…”

Section: A Electrical Corrosion Of the Bearingmentioning

confidence: 99%

“…Since the capacitive voltage of the DFIG bearing is greater than that of the traditional stator-side inverter-fed machines, the bearing of the DFIG will be more likely to suffer the effects of common mode current. One common way in which to ensure a minimal shaft voltage is to use the shaft grounding by means of one or more grounding brushes, which may avoid the damaging current circulating through the bearing to its pedestal [5], [40].…”

Section: A Electrical Corrosion Of the Bearingmentioning

confidence: 99%

“…Owing to the variable speed constant frequency, doubly-fed induction generators (DFIGs) are widely used in wind power generation systems. The use of pulse width modulation (PWM) in rotor side converters may lead to electrical corrosion of the bearing of a DFIG, which significantly accelerates bearing wear [5]. Severe bearing failures may cause catastrophic faults in other components in a wind turbine subsystem, such as shaft cracking, gearbox failure and even damage to the generator.…”

Section: Introductionmentioning

confidence: 99%

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Bearing Corrosion Failure Diagnosis of Doubly Fed Induction Generator in Wind Turbines Based on Stator Current Analysis

Chen

Islam

2020

IEEE Trans. Ind. Electron.

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“…Further, the bearing fault evaluation is carried out for structural health monitoring, fault detection, failure prevention, and prognosis [5]. The measurements methods, advantages, and disadvantages of fault diagnosis methods were discussed for bearing health monitoring through shaft signals [6]. Zhao et al proposed a deep feature optimization fusion method to extract centrifugal pump bearing degradation features from massive amounts of vibration data [7].…”

Section: Introductionmentioning

confidence: 99%

A Fault-Signal-Based Generalizing Remaining Useful Life Prognostics Method for Wheel Hub Bearings

Tang

et al. 2019

Applied Sciences

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The goal of this work is to improve the generalization of remaining useful life (RUL) prognostics for wheel hub bearings. The traditional life prognostics methods assume that the data used in RUL prognostics is composed of one specific fatigue damage type, the data used in RUL prognostics is accurate, and the RUL prognostics are conducted in the short term. Due to which, a generalizing RUL prognostics method is designed based on fault signal data. Firstly, the fault signal model is designed with the signal in a complex and mutative environment. Then, the generalizing RUL prognostics method is designed based on the fault signal model. Lastly, the simplified solution of the generalizing RUL prognostics method is deduced. The experimental results show that the proposed method gained good accuracies for RUL prognostics for all the amplitude, energy, and kurtosis features with fatigue damage types. The proposed method can process inaccurate fault signals with different kinds of noise in the actual working environment, and it can be conducted in the long term. Therefore, the RUL prognostics method has a good generalization.

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

Cited by 139 publications

References 90 publications

Electrical bearing failures in electric vehicles

Electrical bearing failures in electric vehicles

Bearing Corrosion Failure Diagnosis of Doubly Fed Induction Generator in Wind Turbines Based on Stator Current Analysis

A Fault-Signal-Based Generalizing Remaining Useful Life Prognostics Method for Wheel Hub Bearings

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