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Detection of Broken Rotor Bars in Induction Motors Using Stator Current Measurements

1988 Computer science
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Release : 1988
Genre : Computer science
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Book Synopsis Detection of Broken Rotor Bars in Induction Motors Using Stator Current Measurements by : Mark S. Welsh

Download or read book Detection of Broken Rotor Bars in Induction Motors Using Stator Current Measurements written by Mark S. Welsh. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt: Broken rotor bars are a common cause of induction motor failures. In the past, the detection of broken rotor bars has primarily been limited to non-operating, and typically, disassembled machines. The ability to detect broken rotor bars while the machine is operating at normal speed and load is desirable. In support of the ongoing development of a failure analysis system for electrical machines, this thesis evaluates the method of using stator currents and voltages to detect the presence of broken rotor bars in squirrel-cage induction motors. The hypothesis of this method is that, given a sinusoidally applied voltage, the presence of certain harmonics in the stator currents could be used to detect the presence of broken rotor bars. Theses. (MJM).

Detection of Broken Bars in Induction Motors Using Stator Current Measurements

1988
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Release : 1988
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Kind : eBook
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Book Synopsis Detection of Broken Bars in Induction Motors Using Stator Current Measurements by : Mark Steven Welsh

Download or read book Detection of Broken Bars in Induction Motors Using Stator Current Measurements written by Mark Steven Welsh. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt:

Electric Machines

2017-12-19 Technology & Engineering
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Release : 2017-12-19
Genre : Technology & Engineering
Kind : eBook
Book Rating : 282/5 ( reviews)

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Book Synopsis Electric Machines by : Hamid A. Toliyat

Download or read book Electric Machines written by Hamid A. Toliyat. This book was released on 2017-12-19. Available in PDF, EPUB and Kindle. Book excerpt: With countless electric motors being used in daily life, in everything from transportation and medical treatment to military operation and communication, unexpected failures can lead to the loss of valuable human life or a costly standstill in industry. To prevent this, it is important to precisely detect or continuously monitor the working condition of a motor. Electric Machines: Modeling, Condition Monitoring, and Fault Diagnosis reviews diagnosis technologies and provides an application guide for readers who want to research, develop, and implement a more effective fault diagnosis and condition monitoring scheme—thus improving safety and reliability in electric motor operation. It also supplies a solid foundation in the fundamentals of fault cause and effect. Combines Theoretical Analysis and Practical Application Written by experts in electrical engineering, the book approaches the fault diagnosis of electrical motors through the process of theoretical analysis and practical application. It begins by explaining how to analyze the fundamentals of machine failure using the winding functions method, the magnetic equivalent circuit method, and finite element analysis. It then examines how to implement fault diagnosis using techniques such as the motor current signature analysis (MCSA) method, frequency domain method, model-based techniques, and a pattern recognition scheme. Emphasizing the MCSA implementation method, the authors discuss robust signal processing techniques and the implementation of reference-frame-theory-based fault diagnosis for hybrid vehicles. Fault Modeling, Diagnosis, and Implementation in One Volume Based on years of research and development at the Electrical Machines & Power Electronics (EMPE) Laboratory at Texas A&M University, this book describes practical analysis and implementation strategies that readers can use in their work. It brings together, in one volume, the fundamentals of motor fault conditions, advanced fault modeling theory, fault diagnosis techniques, and low-cost DSP-based fault diagnosis implementation strategies.

Induction Motor Fault Diagnosis

2016-04-04 Technology & Engineering
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Release : 2016-04-04
Genre : Technology & Engineering
Kind : eBook
Book Rating : 245/5 ( reviews)

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Book Synopsis Induction Motor Fault Diagnosis by : Subrata Karmakar

Download or read book Induction Motor Fault Diagnosis written by Subrata Karmakar. This book was released on 2016-04-04. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the diagnosis and assessment of the various faults which can occur in a three phase induction motor, namely rotor broken-bar faults, rotor-mass unbalance faults, stator winding faults, single phasing faults and crawling. Following a brief introduction, the second chapter describes the construction and operation of an induction motor, then reviews the range of known motor faults, some existing techniques for fault analysis, and some useful signal processing techniques. It includes an extensive literature survey to establish the research trends in induction motor fault analysis. Chapters three to seven describe the assessment of each of the five primary fault types. In the third chapter the rotor broken-bar fault is discussed and then two methods of diagnosis are described; (i) diagnosis of the fault through Radar analysis of stator current Concordia and (ii) diagnosis through envelope analysis of motor startup current using Hilbert and Wavelet Transforms. In chapter four, rotor-mass unbalance faults are assessed, and diagnosis of both transient and steady state stator current has been analyzed using different techniques. If both rotor broken-bar and rotor-mass unbalance faults occur simultaneously then for identification an algorithm is provided in this chapter. Chapter five considers stator winding faults and five different analysis techniques, chapter six covers diagnosis of single phasing faults, and chapter seven describes crawling and its diagnosis. Finally, chapter eight focuses on fault assessment, and presents a summary of the book together with a discussion of prospects for future research on fault diagnosis.

Induction Machine Broken Rotor Bar Diagnostics Using Prony Analysis

2008 Electric machinery, Induction
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Release : 2008
Genre : Electric machinery, Induction
Kind : eBook
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Book Synopsis Induction Machine Broken Rotor Bar Diagnostics Using Prony Analysis by : Shuo Chen

Download or read book Induction Machine Broken Rotor Bar Diagnostics Using Prony Analysis written by Shuo Chen. This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt: "On-line induction machine condition monitoring techniques have been used widely in the detection of motor broken rotor bars for decades. Research has found that when broken bars occur in the machine rotor, the anomaly of electromagnetic field in the air gap will cause two sideband frequency components presenting in the stator current spectrum. Therefore, identification of these sideband frequencies can be used as a convenient and reliable approach to broken rotor bar fault diagnosis. In this thesis, an induction machine model that includes broken rotor bars is developed using Matlab/Simulink and verified by comparing the experimental and the simulated results. The Prony Analysis method for broken bar diagnosis is implemented and tested using both simulated and measured stator current data. Comparisons between PA [Prony Analysis] and DFT [Discrete Fourier Transform] results are presented, clearly indicating improvements of broken bar diagnostics using PA." -- from Abstract.

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