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    1. Naturvetenskap och teknik
    2. Teknik och industri
    3. Elektronik och kommunikationer

    Current Signature Analysis for Condition Monitoring of Cage Induction Motors

    Industrial Application and Case Histories

    AvWilliam T. Thomson,Ian Culbert

    Inbunden, Engelska, 2017

    Del i serien IEEE Press Series on Power and Energy Systems

    1 594 kr

    Beställningsvara. Skickas inom 5-8 vardagar. Fri frakt över 249 kr.

    Beskrivning

    Provides coverage of Motor Current Signature Analysis (MCSA) for cage induction motorsThis book is primarily for industrial engineers. It has 13 chapters and contains a unique data base of 50 industrial case histories on the application of MCSA to diagnose broken rotor bars or unacceptable levels of airgap eccentricity in cage induction motors with ratings from 127 kW (170 H.P.) up to 10,160 kW (13,620 H.P.). There are also unsuccessful case histories, which is another unique feature of the book. The case studies also illustrate the effects of mechanical load dynamics downstream of the motor on the interpretation of current signatures. A number of cases are presented where abnormal operation of the driven load was diagnosed. Chapter 13 presents a critical appraisal of MCSA including successes, failures and lessons learned via industrial case histories.  The case histories are presented in a step by step format, with predictions and outcomes supported by current spectra and photographic evidence to confirm a correct or incorrect diagnosisThe case histories are presented in detail so readers fully understand the diagnosisThe authors have 108 years of combined experience in the installation, maintenance, repair, design, manufacture, operation and condition monitoring of SCIMsThere are 10 questions at the end of chapters 1 to 12 and answers can be obtained via the publisherCurrent Signature Analysis for Condition Monitoring of Cage Induction Motors serves as a reference for professional engineers, head electricians and technicians working with induction motors.  To obtain the solutions manual for this book, please send an email to pressbooks@ieee.org. William T. Thomson is Director and Consultant with EM Diagnostics Ltd, in Scotland. Prof. Thomson received a BSc (Hons) in Electrical Engineering in 1973 and an MSc in 1977 from the University of Strathclyde. He has published 72 papers on condition monitoring of induction motors in a variety of engineering journals such as IEEE Transactions (USA), IEE Proceedings (UK), and also at numerous International IEEE and IEE conferences. He is a senior member of the IEEE, a fellow of the IEE (IET) in the UK and a Chartered Professional Engineer registered in the UK.Ian Culbert was a Rotating Machines Specialist at Iris Power Qualitrol since April 2002 until his very untimely death on 8th September, 2015. At this company he provided consulting services to customers, assisted in product development, trained sales and field service staff and reviewed stator winding partial discharge reports. He has co-authored two books on electrical machine insulation design, evaluation, aging, testing and repair and was principal author of a number of Electric Power Research Institute reports on motor repair. Ian was a Registered Professional Engineer in the Province of Ontario, Canada and a Senior Member of IEEE.

    Produktinformation

    • Utgivningsdatum:2017-12-08
    • Mått:155 x 239 x 28 mm
    • Vikt:748 g
    • Format:Inbunden
    • Språk:Engelska
    • Serie:IEEE Press Series on Power and Energy Systems
    • Antal sidor:448
    • Förlag:John Wiley & Sons Inc
    • ISBN:9781119029595

    Utforska kategorier

    • Elektronik och kommunikationer inom Naturvetenskap och teknik
    • Energiteknik inom Naturvetenskap och teknik

    Mer om författaren

    WILLIAM T. THOMSON is Director and Consultant with EM Diagnostics Ltd, in Scotland. Prof. Thomson received a BSc (Hons) in Electrical Engineering in 1973 and an MSc in 1977 from the University of Strathclyde. He has published 72 papers on condition monitoring of induction motors in a variety of engineering journals such as IEEE Transactions (USA), IEE Proceedings (UK), and also at numerous International IEEE and IEE conferences. He is a senior member of the IEEE, a fellow of the IEE (IET) in the UK and a Chartered Professional Engineer registered in the UK.IAN CULBERT was a Rotating Machines Specialist at Iris Power Qualitrol since April 2002 until his very untimely death on 8th September, 2015. At this company he provided consulting services to customers, assisted in product development, trained sales and field service staff and reviewed stator winding partial discharge reports. He has co-authored two books on electrical machine insulation design, evaluation, aging, testing and repair and was principal author of a number of Electric Power Research Institute reports on motor repair. Ian was a Registered Professional Engineer in the Province of Ontario, Canada and a Senior Member of IEEE.

    Innehållsförteckning

    • ABOUT THE AUTHORS xiii OBITUARY TO IAN CULBERT xvACKNOWLEDGMENTS xviiFOREWORD xixPREFACE xxiiiNOMENCLATURE xxviiACRONYMS AND ABBREVIATIONS xxxiiiRELEVANT UNITS OF EQUIVALENCE USEFUL FOR THIS BOOK xxxvCHAPTER 1 MOTOR CURRENT SIGNATURE ANALYSIS FOR INDUCTION MOTORS 11.0 Introduction 11.1 Historical Development of MCSA and Goals of This Book 41.2 Basic Theory of Operation of the 3-Phase Induction Motor 61.3 Starting and Run-Up Characteristics of SCIMs 201.4 Illustrations of Construction of a Large HV SCIM 291.5 Questions 33References 34CHAPTER 2 DESIGN, CONSTRUCTION, AND MANUFACTURE OF SQUIRREL CAGE ROTORS 392.0 Introduction 392.1 Aluminum and Copper Die-Cast Windings 402.2 Fabricated Squirrel Cage Windings 432.3 Design and Manufacturing Features of Squirrel Cage Rotor Windings to Minimize Failures 522.4 Questions 53References 54CHAPTER 3 CAUSES OF BREAKS IN SQUIRREL CAGE WINDINGS DURING DIRECT-ON-LINE STARTS AND STEADY-STATE OPERATION 553.0 Introduction 553.1 Mechanical Stresses and Consequential Forces on Rotor Bars and End Rings 563.2 Thermal Stresses in the Rotor Bars and End Rings 573.3 Broken Bars and End Rings Due to Combined Mechanical and Thermal Stresses When Starting High Inertia Loads 593.4 Rotor Bar Stresses Resulting from a Loose Slot Fit 603.5 Strengths and Weaknesses of Certain Bar and End Ring Shapes and Types of Joints 623.6 Pulsating Loads Due to Crushers and Compressors 623.7 Direct-On-Line Starting of Large Induction Motors Driving High Inertia Fans 633.8 Direct-On-Line Starting of Large Induction Motors Driving Centrifugal Pumps 663.9 Limitations on Repetitive Motor Starts 683.10 Criteria for Design of Squirrel Cage Rotor Windings 693.11 Samples of Breaks in Squirrel Cage Rotor Windings 723.12 Questions 77References 77Further Reading 78CHAPTER 4 MOTOR CURRENT SIGNATURE ANALYSIS (MCSA) TO DETECT CAGE WINDING DEFECTS 794.0 Summary 794.1 Introduction 794.2 Derivation of Current Component at f (1 − 2s) 824.3 Reasons for Current Component at f (1 + 2s) 834.4 Spectrum Analysis of Current 854.5 Severity Indicators for Assessing Condition of Cage Windings at Full-Load 934.6 The dB Broken Bar Severity Chart 1104.7 Influence of Number of Rotor Bars and Pole Number on the Equivalent Broken Bar Factor with Measured dB Difference Values 1114.8 Questions 116References 118CHAPTER 5 MCSA INDUSTRIAL CASE HISTORIES—DIAGNOSIS OF CAGE WINDING DEFECTS IN SCIMs DRIVING STEADY LOADS 1195.0 Introduction and Summary of Case Histories 1195.1 Case History (2000–2014)—Summary and Key Features 1205.2 Case History (1983)—Summary and Key Features 1225.3 Case History (1982)—Summary and Key Features 1255.4 Case History (2002)—Summary and Key Features 1285.5 Case History (1985–1987)—Summary and Key Features 1335.6 Case History (2006)—Summary and Key Features 1365.7 MCSA Case History (2004)—Summary and Key Features 1395.8 MCSA Case History (2004)—Summary and Key Features 1415.9 Questions 143References 144CHAPTER 6 MCSA CASE HISTORIES—DIAGNOSIS OF CAGE WINDING DEFECTS IN SCIMs FITTED WITH END RING RETAINING RINGS 1476.0 Introduction and Summary of Case Histories 1476.1 Case History (2006)—Summary 1486.2 Concluding Remarks on this Challenging Case History 1606.3 Case History (1990)—Summary and Key Features 1616.4 Summary and Lessons Learned from Industrial Case Histories in Chapters 5 and 6 1666.5 Questions 170References 172CHAPTER 7 MCSA CASE HISTORIES—CYCLIC LOADS CAN CAUSE FALSE POSITIVES OF CAGE WINDING BREAKS 1737.1 Introduction and Summary of Case Histories 1737.2 Case History (2006)—Effect of Gas Recycling in a Centrifugal Gas Compressor and the Detection of Broken Rotor Bars 1797.3 Case History: False Positive of Broken Rotor Bars Due to Recycling of Gas in a Centrifugal Compressor 1807.4 Two Case Histories (2002 and 2013)—Broken Rotor Bars in the Same SCIM without and with Gas Recycling in a Gas Compressor 1857.5 Case History 1986–Fluid Coupling Dynamics Caused a False Positive of a Cage Winding Break 1937.6 Questions 198References 200CHAPTER 8 MCSA CASE HISTORIES—SCIM DRIVES WITH SLOW SPEED GEARBOXES AND FLUCTUATING LOADS CAN GIVE FALSE POSITIVES OF BROKEN ROTOR BARS 2018.1 Introduction and Summary of Case Histories 2018.2 Case History (1989)—Slow Speed Coal Conveyor, Load Fluctuations, and Gearbox in the Drive Train 2138.3 MCSA Case History (1990)—Possible False Positive of Broken Rotor Bars in a SCIM Driving a Coal Conveyor Via a Slow Speed Gearbox 2168.4 Case History (1992)—Impossible to Analyze MCSA Data Due to Severe Random Current Fluctuations from The Mechanical Load Dynamics from the Coal Crusher 2178.5 Case History (1995)—Successful Assessment of Cage Windings When the Load Current Fluctuations are Normal from a SCIM Driving Coal Crusher 2218.6 Two Case Histories (2015)—False Positive of Broken Bars in One of the SCIMs Driving Thrusters on an FPSO If Influence of Drive Dynamics is Discounted 2278.7 Questions 237References 238CHAPTER 9 MISCELLANEOUS MCSA CASE HISTORIES 2419.0 Introduction and Summary of Case Histories 2419.1 Possible False Positives of Cage Winding Breaks in Two 1850 kW SCIMs, Due to Number of Poles (2p) Equal to Number of Spider Support Arms (Sp) on Shaft (1991) 2429.2 Case History (2007)—SCIM with Number of Poles Equal to Number of Kidney Shaped Axial Ducts in the Rotor—False Positive of Broken Bars Prevented by Load Changes 2519.3 Two Case Histories (2005–2008)—Normal and Abnormal Pumping Dynamics in Two SCIM Seawater Lift Pump Drive Trains 2539.4 MCSA Case History (2006–2007)—Slack and Worn Belt Drives in Two SCIM Cooling Fan Drives in a Cement Factory 2599.5 Application of MCSA to Inverter-FED LV and HV SCIMs 2639.6 Case History (1990)—Assessment of the Mechanical Operational Condition of an Electrical Submersible Pump (ESP) Driven by a SCIM Used in Artificial Oil Lift 2679.7 Questions 270References 271CHAPTER 10 MCSA TO ESTIMATE THE OPERATIONAL AIRGAP ECCENTRICITY IN SQUIRREL CAGE INDUCTION MOTORS 27310.0 Summary and Introduction 27310.1 Definition of Airgap Eccentricity 27410.2 Causes and Associated Types of Airgap Eccentricity 27610.3 Unbalanced Magnetic Pull (UMP) and Rotor Pull-Over 28110.4 Current Signature Pattern due to Airgap Eccentricity 28410.5 Questions 294References 295CHAPTER 11 CASE HISTORIES—SUCCESSFUL AND UNSUCCESSFUL APPLICATION OF MCSA TO ESTIMATE OPERATIONAL AIRGAP ECCENTRICITY IN SCIMS 29911.0 Summary and List of Case Histories 29911.1 Flow Chart of MCSA Procedure to Estimate Operational Airgap Eccentricity 30011.2 Case History (1989)—Low Level of Airgap Eccentricity in a SCIM Driving a Centrifugal Air Compressor 30211.3 Two Case Histories (2004)—Operational Airgap Eccentricity in Nominally Identical SCIMs Driving Pumps in a CCGT Power Station 30711.4 Four Case Histories (2005)—Abnormal Level of Airgap Eccentricity in a Large, Low Speed, HV Motor Driving a Cooling Water Pump in a Power Station 31011.5 Case History (1988)—High Level of Airgap Eccentricity in an HV SCIM Driving a Pump in a Large Oil Storage Tank Facility 31811.6 Case History (2001)—High Airgap Eccentricity in a Cooling Water Pump Motor that Caused Severe Mechanical Damage to HV Stator Coils 32411.7 Case History (2008)—Unsuccessful Application of MCSA Applied to a Large (6300 kW), Inverter-FED, 6600 V SCIM During a No-Load Run to Assess Its Operational Airgap Eccentricity 33211.8 Case History (2008)—Successful Application of MCSA Applied to a Large (4500 kW), Inverter-Fed, 3300 V SCIM to Assess its Operational Airgap Eccentricity 33511.9 Case History (2007)—Advanced MCSA Interpretation of Current Spectra Was Required to Verify High Airgap Eccentricity in an HV SCIM Driving a Primary Air (PA) Fan in a Power Station 33911.10 Case History (1990)—Unsuccessful MCSA Case History to Assess Operational Airgap Eccentricity in an HV SCIM Driving a Slow Speed Reciprocating Compressor 34311.11 Case History (2002)—Predict Number of Rotor Slots and Assessment of Operational Airgap Eccentricity in a Large 6600 V, 6714 kW/9000 HP SCIM Driving a Centrifugal Compressor 34711.12 Questions 353References 357CHAPTER 12 CRITICAL APPRAISAL OF MCSA TO DIAGNOSE SHORT CIRCUITED TURNS IN LV AND HV STATOR WINDINGS AND FAULTS IN ROLLER ELEMENT BEARINGS IN SCIMS 35912.1 Summary 35912.2 Shorted Turns in HV Stator Winding Coils 36112.3 Detection of Shorted Turns Via MCSA under Controlled Experimental Conditions 36412.4 Detection of Defects in Roller Element Bearings Via MCSA 36812.5 Questions 371References 372CHAPTER 13 APPRAISAL OF MCSA INCLUDING LESSONS LEARNED VIA INDUSTRIAL CASE HISTORIES 37513.1 Summary of MCSA in Industry to Diagnose Cage Winding Breaks 37513.2 Flow Chart for Measurement and Analysis of Current to Diagnose Cage Winding Breaks 37513.3 MCSA to Diagnose Broken Rotor Bars in SCIMs Driving Steady Loads 37913.4 Number of Rotor Bars, External Constraints, and Lessons Learned 38013.5 Effect of End Ring Retaining Rings (ERRS) on Diagnosis of Broken Rotor Bars 38113.6 MCSA Applied to SCIMs Driving Complex Mechanical Plant, Lessons Learned, and Recommendations 38213.7 Double Cage Rotors—Classical MCSA can only Detect Cage Winding Breaks in Inner Run Winding 38213.8 MCSA to Diagnose Operational Levels of Airgap Eccentricity in SCIMs 38313.9 Recommendations to End Users 38513.10 Suggested Research and Development Projects 386References 388Appendix 13.A Commentary on Interpretation of LV and HV Used in SCIMs 388LIST OF EQUATIONS 389INDEX 393