Practical Rules for Assessment of Inverter-Induced Bearing Currents in Inverter-Fed AC Motors up to 500 kW

Muetze, Annette; Binder, A.

doi:10.1109/tie.2007.894698

Cited by 166 publications

(106 citation statements)

References 25 publications

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“…In particular, a very interesting paper has been recently proposed by Muetze in which the different contributions proposed so far on such different aspects have been thoroughly reviewed [9]. Muetze and Binder have also provided a clear classification of the different mechanisms responsible of BC as well as significant results from experimental tests [10][11][12][13][14][15][16]. Among the different BC mechanisms, the so called circulating bearing currents flowing in the loop stator frame-nondrive end-shaft drive end of the motor may assume, depending on the motor size, very high peak values (up to 20 A for a 400 V, 500 kW machine) [10,13].…”

Section: Bearing Voltage: State Of Artmentioning

confidence: 99%

“…Muetze and Binder have also provided a clear classification of the different mechanisms responsible of BC as well as significant results from experimental tests [10][11][12][13][14][15][16]. Among the different BC mechanisms, the so called circulating bearing currents flowing in the loop stator frame-nondrive end-shaft drive end of the motor may assume, depending on the motor size, very high peak values (up to 20 A for a 400 V, 500 kW machine) [10,13]. Such currents are caused by a shaft voltage which, in turn, depends on the statorwinding-to-frame capacitance excited by the high dv/dt of the CMV.…”

Section: Bearing Voltage: State Of Artmentioning

confidence: 99%

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Simulation of the Bearing Voltage in an Inverter-Fed Induction Motor by a Full Three Phase Multi Conductor Transmission Line Model

Vivo¹,

Lamberti²,

Tucci³

et al. 2013

PIER B

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Abstract-An accurate numerical model, based on multiconductor transmission lines (MTL) able to evaluate the voltage dynamics across the motor bearings and associated currents of an inverter-fed motor is presented. A full three phase stator winding of the wound type of a high power traction motor is considered in the proposed analysis. The different regions of the motor are modeled as suitable connections of lossy MTL which are then studied in the time domain. The per unit length characteristic matrices describing the MTL are accurately calculated by a FEM based software. The effects of the rise time of the input voltage and the length of the feeder cables are discussed. The reliability of the numerical results achieved by means of the MTL model is checked by performing a comparison with those obtained by considering a lumped parameter equivalent circuit.

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Section: Bearing Voltage: State Of Artmentioning

confidence: 99%

Section: Bearing Voltage: State Of Artmentioning

confidence: 99%

Simulation of the Bearing Voltage in an Inverter-Fed Induction Motor by a Full Three Phase Multi Conductor Transmission Line Model

Vivo¹,

Lamberti²,

Tucci³

et al. 2013

PIER B

View full text Add to dashboard Cite

show abstract

“…Hence, the reliability of these inverters becomes an important factor in ensuring their safe and efficient performance during different fault occurrence. Furthermore, high costs due to stand still and repair, as well as general need to improve reliability, have led to research in fault detection systems [2][3][4][5][6][7][8]. Usually, fault tolerant system consists of three major features such as component redundancy, fault detection and isolation and reconfiguration system.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Three Fault Diagnostic Methods for Three Phase Inverter with Induction Motor

Asghar¹,

Talha²,

Kim³

2017

IJFIS

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In recent times, inverters are considered as the basic building block in an electrical drive system used widely in many industrial drive applications. However, the reliability of these inverters is mainly affected by the failure of power electronic switches. Various faults in inverter may influence the system operation by unexpected maintenance, which increases the cost factor and reduce overall efficiency. In this paper, comparative study of three different fault detection and diagnosis systems for three phase inverter is presented. The basic purpose of these fault detection and diagnosis systems is to detect single or multiple faults efficiently. These techniques rely on the neural network for fault detection and diagnosis by using Clarke transformed two-dimensional features extraction, three-dimensional features extraction and features extraction using discrete wavelet transform (DWT) with a different number of features in each technique. Several features are extracted using different mechanisms and used in the neural network as input for fault detection and diagnosis. Furthermore, a simulation study is carried out to analyze the fault detection and diagnosis response of these techniques. Also, a comparative study has been performed by considering fault detection time and accuracy. Comparison results prove the supremacy of three-dimensional feature extraction technique over other two techniques as it can detect and diagnose single, double and triple faults in a single cycle with high accuracy as compared to other two techniques multi-cycles detection.

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“…Как правило, ПП имеют двухзвенную струк-туру с комплексом средств в звене постоянного напряжения (сглаживающие дроссель и конденса-тор, тормозной ключ, тормозной резистор, устрой-ство предварительной зарядки конденсатора и др.) [1][2][3][4][5]. На рис.…”

Section: Introductionunclassified

Bearing currents of driving machines in drives with semiconductor transformers

Юрьевич¹,

Евтихиевич²

2016

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93Введение В современных электроприводах (ЭП) для электроснабжения и управления приводными электродвигателями в большинстве случаев ис-пользуются полупроводниковые преобразователи (ПП). Как правило, ПП имеют двухзвенную струк-туру с комплексом средств в звене постоянного напряжения (сглаживающие дроссель и конденса-тор, тормозной ключ, тормозной резистор, устрой-ство предварительной зарядки конденсатора и др.) [1][2][3][4][5]. На рис. 1 приведена типовая структурная схема электропривода с двухзвенным ПП.На входе двухзвенного ПП устанавливается выпрямитель напряжения (диодный неуправляе-мый или транзисторный управляемый -актив-ный), который через трансформатор или сетевой дроссель подключается к сети электроснабжения. На выходе двухзвенного ПП устанавливается ав-тономный инвертор напряжения, который через преобразовательное (трансформатор) или фильтро-компенсирующее устройство (синус-фильтр, мо-торный дроссель и др.) подключается к приводно-му электродвигателю [6][7][8][9][10][11][12][13] Частой проблемой электроприводов с полупроводниковыми преобразователями является ускорен-ный износ подшипниковых узлов приводного электродвигателя. Такие повреждения вызваны образова-нием в приводном электродвигателе подшипниковых токов, которое могут оказывать непрерывное или постоянное воздействие на подшипниковые узлы.В данной работе проанализированы причины возникновения подшипниковых токов в приводных машинах современных электроприводов. Выделены и описаны основные виды подшипниковых токов, даны их характеристики. Описан основной негативный эффект и последствия длительного и кратковре-менного воздействия подшипниковых токов. Приведены основные способы измерения и контроля под-шипниковых токов. Описаны способы борьбы с подшипниковыми токами, проанализирована их эффек-тивность, даны рекомендации по их использованию в современных электроприводах. Приведены основ-ные международные нормативные документы, регламентирующие допустимые значения подшипнико-вых токов и способы борьбы с ними. Даны рекомендации по развитию отечественной нормативной базы по подшипниковым токам.Дальнейшие исследования подшипниковых токов приводных электродвигателей с полупроводнико-выми преобразователями частоты будут заключаться в построении математических моделей процессов их возникновения с учетом режимов работы автономного инвертора, электродвигателя и заземления, их ана-лизе путем имитационного моделирования и разработке алгоритмических способов их устранения.Ключевые слова: подшипниковый ток, электропривод, электродвигатель, полупроводниковый пре-образователь, энергетическая совместимость.

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Practical Rules for Assessment of Inverter-Induced Bearing Currents in Inverter-Fed AC Motors up to 500 kW

Cited by 166 publications

References 25 publications

Simulation of the Bearing Voltage in an Inverter-Fed Induction Motor by a Full Three Phase Multi Conductor Transmission Line Model

Simulation of the Bearing Voltage in an Inverter-Fed Induction Motor by a Full Three Phase Multi Conductor Transmission Line Model

Comparative Study of Three Fault Diagnostic Methods for Three Phase Inverter with Induction Motor

Bearing currents of driving machines in drives with semiconductor transformers

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