Electrical Machines, 2nd Edition

Electrical Machines, 2nd Edition

by Smarajit Ghosh
Released March 2012
Publisher(s): Pearson India
ISBN: 9789332503229

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Book description

This fully revised edition of the book is systematically organized as per the logical flow of the topics included in electrical machines courses in universities across India. It is written as a text-cum-guide so that the underlying principles can be readily understood, and is useful to both the novice as well as advanced readers. Emphasis has been laid on physical understanding and pedagogical aspects of the subject. In addition to conventional machines, the book's extensive coverage also includes rigorous treatment of transformers (current, potential and welding transformers), special machines, AC/DC servomotors, linear induction motors, permanent magnet DC motors and application of thyristors in rotating machines.

Table of contents

  1. Cover Page
  2. Title Page
  3. Copyright
  4. Dedication
  5. Contents
  6. PREFACE
    1. Acknowledgements
  7. Introduction
    1. ELECTROMAGNETISM
    2. DIRECTION OF CURRENT IN A CONDUCTOR
    3. DIRECTION OF MAGNETIC FLUX IN A CONDUCTOR
    4. FLUX DISTRIBUTION OF AN ISOLATED CURRENT-CARRYING CONDUCTOR
    5. FORCE BETWEEN TWO CURRENT-CARRYING CONDUCTORS
    6. FORCE ON A CONDUCTOR IN A MAGNETIC FIELD
    7. GENERATION OF INDUCED EMF AND CURRENT
    8. FARADAY’S LAWS
    9. LENZ’S LAW
    10. INDUCED EMF
    11. MAGNETIC CIRCUITS
    12. MAGNETOMOTIVE FORCE
    13. MAGNETIC FIELD INTENSITY
    14. MAGNETIC FLUX
    15. SINGLE-PHASE CIRCUITS
    16. POWER TRIANGLE
    17. COMPLEX POWER
    18. THREE-PHASE CIRCUITS
    19. ADVANTAGES OF THREE-PHASE SYSTEM
    20. PHASE SEQUENCE
    21. INTERCONNECTION OF THREE PHASES
    22. STAR AND DELTA CONNECTIONS
    23. VOLTAGES, CURRENTS AND POWER IN STAR CONNECTIONS
    24. VOLTAGES, CURRENTS AND POWER IN DELTA CONNECTIONS
    25. MEASUREMENT OF THREE-PHASE POWER
    26. PRINCIPLE OF ENERGY CONVERSION
    27. ENERGY IN THE COUPLING FIELD
    28. ENERGY IN THE FIELD
    29. CO-ENERGY
    30. ELECTRICAL ENERGY INPUT TO THE SYSTEM
    31. ESTIMATION OF MECHANICAL FORCES IN AN ELECTROMAGNETIC SYSTEM
    32. DOUBLY EXCITED SYSTEMS
    33. CYLINDRICAL ROTATING MACHINE
    34. Case 1: Synchronous Motor/Machine
  8. 1 Transformers
    1. 1.1 DEFINITION
    2. 1.2 BASIC PRINCIPLE
    3. 1.3 TYPES OF TRANSFORMERS
    4. 1.4 CONSTRUCTION OF SINGLE-PHASE TRANSFORMER
    5. 1.5 TRANSFORMER WINDINGS
    6. 1.6 TERMINALS AND LEADS
    7. 1.7 BUSHINGS
    8. 1.8 TAPPING
    9. 1.9 COOLING OF TRANSFORMER
    10. 1.10 TRANSFORMER OIL
    11. 1.11 CONSERVATOR AND BREATHER
    12. 1.12 BUCHHOLZ RELAY
    13. 1.13 TRANSFORMER TANK
    14. 1.14 THEORY OF TRANSFORMER
    15. 1.15 EMF EQUATION OF A TRANSFORMER
    16. 1.16 STEP-UP AND STEP-DOWN TRANSFORMER
    17. 1.17 TRANSFORMER ON NO LOAD
    18. 1.18 TRANSFORMER ON LOAD
    19. 1.19 EQUIVALENT RESISTANCE
    20. 1.20 MAGNETIC LEAKAGE
    21. 1.21 EQUIVALENT REACTANCE
    22. 1.22 TRANSFORMER WITH RESISTANCE AND LEAKAGE REACTANCE
    23. 1.23 EQUIVALENT CIRCUIT
    24. 1.24 OPEN CIRCUIT TEST OR NO-LOAD TEST
    25. 1.25 SHORT CIRCUIT OR IMPEDANCE TEST
    26. 1.26 SEPARATION OF CORE (OR IRON) LOSSES IN A TRANSFORMER
    27. 1.27 TOTAL APPROXIMATE VOLTAGE DROP OF A TRANSFORMER
    28. 1.28 EXACT VOLTAGE DROP
    29. 1.29 PER UNIT RESISTANCE, LEAKAGE REACTANCE AND IMPEDANCE VOLTAGE DROP
    30. 1.30 VOLTAGE REGULATION OF TRANSFORMER
    31. 1.31 CALCULATION FOR VOLTAGE REGULATION
    32. 1.32 LOSSES IN A TRANSFORMER
    33. 1.33 EFFICIENCY OF A TRANSFORMER
    34. 1.34 CONDITION FOR MAXIMUM EFFICIENCY
    35. 1.35 ALL-DAY EFFICIENCY
    36. 1.36 POLARITY TEST OF A SINGLE-PHASE TRANSFORMER
    37. 1.37 SUMPNER’S TEST
    38. 1.38 PARALLEL OPERATION OF SINGLE-PHASE TRANSFORMER
    39. 1.39 LOAD SHARING BY TWO TRANSFORMERS
    40. 1.40 AUTOTRANSFORMERS
    41. 1.41 PULSE TRANSFORMER
    42. 1.42 WELDING TRANSFORMERS
    43. 1.43 CURRENT TRANSFORMER
    44. 1.44 POTENTIAL TRANSFORMER
    45. 1.45 TAP CHANGING TRANSFORMERS
    46. 1.46 OFF-LOAD TAP-CHANGING TRANSFORMERS
    47. 1.47 ON-LOAD TAP-CHANGING TRANSFORMERS
    48. 1.48 ON-LOAD TAP CHANGER WITH SINGLE PRIMARY WINDING
    49. 1.49 PREVENTIVE AUTOTRANSFORMER
    50. 1.50 BOOSTER TRANSFORMER
    51. 1.51 INRUSH PHENOMENON
    52. ADDITIONAL SOLVED PROBLEMS
    53. SIGNIFICANT POINTS
    54. SHORT QUESTIONS AND ANSWERS
    55. SUPPLEMENTARY PROBLEMS
    56. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  9. 2 Three-phase Transformers
    1. 2.1 ADVANTAGES OF THREE-PHASE TRANSFORMERS
    2. 2.2 PRINCIPLE OF OPERATION
    3. 2.3 CONSTRUCTION OF THREE-PHASE TRANSFORMERS
    4. 2.4 THREE-PHASE TRANSFORMER CONNECTION
    5. 2.5 OPEN-DELTA OR V-V CONNECTION
    6. 2.6 SCOTT CONNECTION OR T-T CONNECTION
    7. 2.7 THREE-PHASE TO TWO-PHASE CONVERSION
    8. 2.8 PARALLEL OPERATIONS OF TRANSFORMERS
    9. 2.9 THREE-PHASE TO SIX-PHASE CONVERSION
    10. 2.10 THREE-WINDING TRANSFORMER
    11. 2.11 THREE-PHASE TRANSFORMER CONNECTIONS
    12. 2.12 RATING OF TRANSFORMERS
    13. ADDITIONAL SOLVED PROBLEMS
    14. SIGNIFICANT POINTS
    15. SHORT QUESTIONS AND ANSWERS
    16. SUPPLEMENTARY PROBLEMS
    17. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  10. 3 Basic concepts of Rotating Machines
    1. 3.1 ELECTROMAGNETIC TORQUE
    2. 3.2 RELUCTANCE TORQUE
    3. 3.3 CONSTRUCTIONAL FEATURES OF ROTATING ELECTRICAL MACHINES
    4. 3.4 CONSTRUCTION OF DC MACHINES
    5. 3.5 RING WINDINGS
    6. 3.6 DRUM WINDINGS
    7. 3.7 TYPES OF DC WINDINGS
    8. 3.8 EQUALIZING CONNECTIONS FOR LAP WINDING
    9. 3.9 USES OF LAP AND WAVE WINDINGS
    10. 3.10 DUMMY COILS
    11. 3.11 PRINCIPLE OF DC GENERATOR
    12. 3.12 OPERATION OF A SIMPLE DC GENERATOR WITH A TWO-SEGMENT COMMUTATOR
    13. 3.13 PRINCIPLE OF DC MOTOR
    14. 3.14 CONSTRUCTION OF SYNCHRONOUS MACHINES
    15. 3.15 POLYPHASE INDUCTION MACHINES
    16. 3.16 AIR GAP
    17. 3.17 PRINCIPLE OF OPERATION OF THREE-PHASE INDUCTION MOTOR
    18. 3.18 SYNCHRONOUS SPEED AND SLIP IN INDUCTION MOTOR
    19. 3.19 FREQUENCY OF ROTOR CURRENTS
    20. 3.20 SPEED OF THE ROTOR MMF
    21. 3.21 ELECTRICAL AND MECHANICAL DEGREES
    22. 3.22 PITCH FACTOR
    23. 3.23 DISTRIBUTION FACTOR
    24. 3.24 WINDING FACTOR
    25. 3.25 FLUX PER POLE
    26. 3.26 GENERATED EMF IN FULL-PITCHED COIL
    27. 3.27 EMF GENERATED IN AC MACHINES
    28. 3.28 EMF GENERATED IN DC GENERATOR
    29. 3.29 CONCEPT OF ROTATING MAGNETIC FIELD
    30. ADDITIONAL SOLVED PROBLEMS
    31. SIGNIFICANT POINTS
    32. SHORT QUESTIONS AND ANSWERS
    33. SUPPLEMENTARY PROBLEMS
    34. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  11. 4 DC Generators
    1. 4.1 TYPES OF DC MACHINES
    2. 4.2 DC GENERATOR
    3. 4.3 BRUSH DROP
    4. 4.4 EMF EQUATION
    5. 4.5 DERIVATION FOR E g
    6. 4.6 LOSSES IN DC GENERATOR
    7. 4.7 STRAY LOSSES
    8. 4.8 CONSTANT OR STANDING LOSSES
    9. 4.9 POWER STAGES
    10. 4.10 EFFICIENCY
    11. 4.11 CONDITION FOR MAXIMUM EFFICIENCY
    12. 4.12 ARMATURE REACTION IN DC MACHINES
    13. 4.13 DEMAGNETIZING AND CROSS-MAGNETIZING CONDUCTORS
    14. 4.14 DEMAGNETIZING AMPERE-TURNS PER POLE
    15. 4.15 CROSS-MAGNETIZING AMPERE-TURNS PER POLE
    16. 4.16 COMPENSATING WINDINGS
    17. 4.17 NUMBER OF COMPENSATING WINDINGS
    18. 4.18 COMMUTATION
    19. 4.19 VALUE OF REACTANCE VOLTAGE
    20. 4.20 METHODS OF IMPROVING COMMUTATION
    21. 4.21 EQUALIZER RINGS
    22. 4.22 CHARACTERISTICS OF DC GENERATORS
    23. 4.23 SEPARATELY EXCITED GENERATORS
    24. 4.24 NO-LOAD CURVE FOR SELF-EXCITED GENERATORS
    25. 4.25 ADVANTAGES AND DISADVANTAGES OF SEPARATELY EXCITED GENERATORS
    26. 4.26 VOLTAGE BUILD-UP OF SHUNT GENERATOR
    27. 4.27 CONDITIONS FOR BUILD-UP OF SHUNT GENERATOR
    28. 4.28 REASONS FOR FAILURE TO BUILD-UP OF SHUNT GENERATORS
    29. 4.29 EXTERNAL CHARACTERISTIC OF SHUNT GENERATOR
    30. 4.30 VOLTAGE REGULATION
    31. 4.31 INTERNAL OR TOTAL CHARACTERISTIC
    32. 4.32 EXTERNAL CHARACTERISTIC AND INTERNAL CHARACTERISTIC FROM OCC
    33. 4.33 EFFECT OF BRUSH SHIFT ON THE TERMINAL VOLTAGE
    34. 4.34 SERIES GENERATOR
    35. 4.35 COMPOUND GENERATOR
    36. 4.36 PARALLEL OPERATIONS OF DC GENERATORS
    37. 4.37 REQUIREMENTS FOR PARALLELING DC GENERATORS
    38. 4.38 PARALLEL OPERATION OF SHUNT GENERATORS
    39. 4.39 PARALLEL OPERATION OF SERIES GENERATORS
    40. 4.40 PARALLEL OPERATION OF COMPOUND GENERATORS
    41. 4.41 USES OF DC GENERATORS
    42. 4.42 INDICATIONS OF AN OVERLOADED GENERATORS
    43. 4.43 CAUSES OF OVERLOADING
    44. 4.44 CAUSES OF SPARKING AT BRUSHES OF A DC MACHINE
    45. 4.45 CAUSES OF EXCESSIVE HEATING OF GENERATOR ON RUNNING
    46. 4.46 CAUSES OF HEATING OF ARMATURE
    47. 4.47 CAUSES FOR ABNORMAL SOUND IN DC GENERATOR
    48. 4.48 REASONS FOR RAPID BRUSH WEAR IN A DC MACHINE
    49. ADDITIONAL SOLVED PROBLEMS
    50. SIGNIFICANT POINTS
    51. SHORT QUESTIONS AND ANSWERS
    52. SUPPLEMENTARY PROBLEMS
    53. MULTIPLE-CHOICE ΩUESTIONS AND ANSWERS
  12. 5 DC Motors
    1. 5.1 VOLTAGE EQUATION
    2. 5.2 BACK EMF
    3. 5.3 CONDITION FOR MAXIMUM MECHANICAL POWER
    4. 5.4 ARMATURE TORQUE OF A MOTOR
    5. 5.5 ROTATIONAL LOSSES OF DC MACHINES
    6. 5.6 COMPOUND MOTOR
    7. 5.7 RELATION OF SPEED (N) WITH BACK EMF (E b ) AND FLUX ( Φ )
    8. 5.8 CHARACTERISTICS OF SHUNT OR SEPARATELY EXCITED DC MOTOR
    9. 5.9 CHARACTERISTICS OF DC SERIES MOTOR
    10. 5.10 CHARACTERISTICS OF COMPOUND MOTOR
    11. 5.11 SPEED REGULATION
    12. 5.12 TORQUE AND SPEED OF DC SERIES MOTOR
    13. 5.13 SPEED CONTROL OF DC MOTORS
    14. 5.13.1 Armature Resistance Control
    15. 5.13.2 Field Resistance Control
    16. 5.14 WARD-LEONARD CONTROL (VOLTAGE CONTROL)
    17. 5.15 NECESSITY OF A STARTER FOR DC MOTORS
    18. 5.16 MANUAL STARTER
    19. 5.16.1 Three-point Starter
    20. 5.17 AUTOMATIC STARTERS
    21. 5.17.1 Time Element Starter
    22. 5.17.4 Series Current-limit Starter
    23. 5.18 STARTERS FOR DC SERIES MOTORS
    24. 5.19 DC SHUNT MOTOR STARTER DESIGN
    25. 5.20 ELECTRIC BRAKING
    26. 5.21 ELECTRIC BRAKING OF SHUNT MOTORS
    27. 5.22 ELECTRIC BRAKING OF SERIES MOTOR
    28. 5.22.3 Regenerative Braking
    29. 5.23 TESTING OF DC MACHINES
    30. 5.24 BRAKE TEST
    31. 5.25 SWINBURNE’S TEST
    32. 5.26 HOPKINSON’S TEST (BACK-TO-BACK TEST)
    33. 5.27 SEPARATION OF LOSSES IN A DC MACHINE
    34. 5.28 RETARDATION OR RUNNING TEST
    35. 5.29 FIELD’S TEST
    36. 5.30 USES OF DC MOTORS
    37. 5.31 SPECIAL DC MACHINES
    38. 5.32 CHARACTERISTICS OF CROSS-FIELD GENERATORS
    39. 5.33 BRUSHLESS DC MOTOR
    40. 5.34 FEATURES OF BRUSHLESS DC MOTOR
    41. ADDITIONAL SOLVED PROBLEMS
    42. SIGNIFICANT POINTS
    43. SHORT QUESTIONS AND ANSWERES
    44. SUPPLEMENTARY PROBLEMS
    45. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  13. 6 Synchronous Generators
    1. 6.1 PARAMETERS OF ARMATURE WINDING
    2. 6.2 ARMATURE REACTION
    3. 6.3 CONCEPT OF SYNCHRONOUS REACTANCE AND IMPEDANCE
    4. 6.4 EQUIVALENT CIRCUIT OF AN ALTERNATOR
    5. 6.5 VOLTAGE EQUATION OF ALTERNATOR
    6. 6.6 PHASOR DIAGRAM OF ALTERNATOR
    7. 6.7 VOLTAGE REGULATION
    8. 6.8 DETERMINATION OF VOLTAGE REGULATION
    9. 6.9 LOAD CHARACTERISTICS OF ALTERNATORS
    10. 6.10 OUTPUT POWER EQUATION OF AN ALTERNATOR
    11. 6.11 INPUT POWER EQUATION OF ALTERNATOR
    12. 6.12 TWO-REACTION THEORY
    13. 6.13 TWO-REACTION THEORY OF SALIENT-POLE ALTERNATOR
    14. 6.14 TORQUE-ANGLE CHARACTERISTIC OF SALIENT-POLE ALTERNATOR
    15. 6.15 MAXIMUM REACTIVE POWER FOR SALIENT-POLE ALTERNATOR
    16. 6.16 LOSSES AND EFFICIENCY
    17. 6.17 DETERMINATION OF X d AND X q
    18. 6.18 CAPABILITY CURVES
    19. 6.19 EXCITATION CIRCLE OF AN ALTERNATOR
    20. 6.20 PRIME MOVER CHARACTERISTIC
    21. 6.21 INFINITE BUS
    22. 6.22 NEED FOR PARALLEL OPERATION OF ALTERNATORS
    23. 6.23 SYNCHRONIZING PROCEDURES OF ALTERNATOR
    24. 6.24 DISTRIBUTION OF LOAD
    25. 6.25 SYNCHRONIZING POWER AND SYNCHRONIZING TORQUE COEFFICIENT
    26. 6.26 UNITS OF SYNCHRONIZING POWER COEFFICIENT
    27. 6.27 SIGNIFICANCE OF SYNCHRONIZING POWER COEFFICIENT
    28. 6.28 HUNTING
    29. 6.29 OSCILLATIONS OF SYNCHRONOUS MACHINES
    30. 6.30 SUDDEN SHORT CIRCUIT OF SYNCHRONOUS GENERATOR
    31. 6.31 SHORT-CIRCUIT RATIO
    32. 6.32 PROTECTION OF GENERATORS
    33. ADDITIONAL SOLVED PROBLEMS
    34. SIGNIFICANT POINTS
    35. SHORT QUESTIONS AND ANSWERS
    36. SUPPLEMENTARY PROBLEMS
    37. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  14. 7 Synchronous Motors
    1. 7.1 PRINCIPLES OF OPERATION
    2. 7.2 ARMATURE REACTION IN SYNCHRONOUS MOTORS
    3. 7.3 PHASOR DIAGRAM OF SYNCHRONOUS MOTOR
    4. 7.4 OPERATION AT A CONSTANT LOAD WITH VARIABLE EXCITATION
    5. 7.5 V CURVES AND INVERTED V CURVES
    6. 7.6 COMPLEX POWER INPUT OF SYNCHRONOUS MOTOR
    7. 7.7 COMPLEX POWER OUTPUT OF A SYNCHRONOUS MOTOR
    8. 7.8 MAXIMUM OUTPUT POWER
    9. 7.9 POWER OUTPUT WHEN ARMATURE RESISTANCE IS NEGLIGIBLE
    10. 7.10 INPUT REACTIVE POWER WHEN ARMATURE RESISTANCE IS NEGLIGIBLE
    11. 7.11 MOTOR CHARACTERISTICS, PERFORMANCE AND CIRCLE DIAGRAM OF A SYNCHRONOUS MOTOR
    12. 7.12 TORQUE OF A SYNCHRONOUS MOTOR
    13. 7.13 SALIENT-POLE SYNCHRONOUS MOTOR –TWO-REACTION MODEL
    14. 7.14 POWER DEVELOPED BY A SALIENT-POLE SYNCHRONOUS MOTOR
    15. 7.15 DAMPER WINDINGS
    16. 7.16 DAMPING EFFECT
    17. 7.17 HUNTING/SURGING OF SYNCHRONOUS MOTORS
    18. 7.18 PERIODICITY OF HUNTING
    19. 7.19 METHODS OF STARTING OF SYNCHRONOUS MOTORS
    20. 7.20 APPLICATIONS OF SYNCHRONOUS MOTOR
    21. 7.21 SYNCHRONOUS CONDENSERS
    22. ADDITIONAL SOLVED PROBLEMS
    23. SIGNIFICANT POINTS
    24. SHORT QUESTIONS AND ANSWERS
    25. SUPPLEMENTARY PROBLEMS
    26. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  15. 8 Polyphase Induction Motors
    1. 8.1 ROTOR CURRENT
    2. 8.2 ROTOR POWER
    3. 8.18 SYNCHRONOUS WATT
    4. 8.19 MEASUREMENT OF SLIP
    5. 8.20 EQUIVALENT CIRCUIT
    6. 8.21 THEVENIN´S EQUIVALENT CIRCUIT OF AN INDUCTION MOTOR
    7. 8.22 STARTING OF INDUCTION MOTORS
    8. 8.23 STARTING OF SQUIRREL-CAGE MOTORS
    9. 8.24 STARTING OF SLIP-RING INDUCTION MOTORS
    10. 8.25 NO-LOAD TEST OR OPEN-CIRCUIT TEST
    11. 8.26 BLOCKED-ROTOR OR SHORT-CIRCUIT TEST
    12. 8.27 DIRECT TESTING OF INDUCTION MOTORS
    13. 8.28 CIRCLE DIAGRAM
    14. 8.29 SPEED CONTROL OF INDUCTION MOTOR
    15. 8.30 COMPARISON BETWEEN WOUND-ROTOR AND CAGE-ROTOR INDUCTION MOTORS
    16. 8.31 CRAWLING
    17. 8.32 MAGNETIC LOCKING (COGGING)
    18. 8.33 DEEP-CAGE ROTORS
    19. 8.34 DOUBLE-CAGE ROTORS
    20. 8.35 APPLICATIONS
    21. 8.36 COMPARISON BETWEEN SYNCHRONOUS AND INDUCTION MOTORS
    22. 8.37 FACTORS GOVERNING THE PERFORMANCE OF INDUCTION MOTORS
    23. 8.38 EFFECTS OF OPERATING CONDITIONS
    24. 8.39 RATINGS OF INDUCTION MOTOR
    25. 8.40 COMMON FAULTS IN THREE-PHASE INDUCTION MOTORS
    26. 8.41 MOST PROBABALE REASONS FOR WHICH THREE- PHASE INDUCTION MOTORS FAIL TO START
    27. 8.42 MOST PROBABALE REASONS FOR WHICH THREE-PHASE INDUCTION MOTORS FAIL TO CARRY LOAD
    28. 8.43 SCHRAGE MOTOR
    29. 8.44 POWER FACTOR COMPENSATION
    30. 8.45 LINEAR INDUCTION MOTOR
    31. 8.46 INDUCTION GENERATOR
    32. 8.47 ELECTRICAL BRAKING OF POLYPHASE INDUCTION MOTORS
    33. 8.48 SYNCHRONOUS-INDUCTION MOTOR
    34. ADDITIONAL SOLVED PROBLEMS
    35. SIGNIFICANT POINTS
    36. SHORT QUESTIONS AND ANSWERS
    37. SUPPLEMENTARY PROBLEMS
    38. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  16. 9 Single-phase Motors and Special Machines
    1. 9.1 CLASSIFICATION OF SINGLE-PHASE INDUCTION MOTORS
    2. 9.2 PRODUCTION OF ROTATING FIELD
    3. 9.3 WORKING PRINCIPLE OF SINGLE-PHASE INDUCTION MOTOR
    4. 9.4 DOUBLE REVOLVING FIELD THEORY
    5. 9.5 ROTOR SLIP WITH RESPECT TO TWO ROTATING FIELDS
    6. 9.6 EQUIVALENT CIRCUIT OF SINGLE-PHASE, SINGLE-WINDING INDUCTION MOTOR
    7. 9.7 POWER DEVELOPED AND LOSSES OF SINGLE-PHASE, SINGLE-WINDING INDUCTION MOTOR
    8. 9.8 DETERMINATION OF EQUIVALENT CIRCUIT PARAMETERS
    9. 9.9 SPLIT-PHASE INDUCTION MOTORS
    10. 9.10 CAPACITOR MOTORS
    11. 9.11 PERMANENT SPLIT CAPACITOR MOTORS
    12. 9.12 SHADED POLE MOTOR
    13. 9.13 SINGLE-PHASE SYNCHRONOUS MOTORS
    14. 9.14 SERIES MOTOR OR UNIVERSAL MOTOR
    15. 9.15 STEPPER MOTOR
    16. 9.16 CHARACTERISTICS OF STEPPER MOTORS
    17. 9.17 DC SERVOMOTORS
    18. 9.18 AC SERVOMOTORS
    19. 9.19 SERVOMECHANISM
    20. SIGNIFICANT POINTS
    21. SHORT QUESTIONS AND ANSWERS
    22. SUPPLEMENTARY PROBLEMS
    23. MULTIPLE-CHOICE QUESTIONS AND ANSWERS
  17. Appendix A: Basic Definition, Hysteresis and Eddy Current Losses
    1. A.1 RESISTANCE AND RESISTIVITY
    2. A.2 INDUCTANCE
    3. A.3 COEFFICIENT OF COUPLING
    4. A.4 DOT CONVENTION
    5. A.5 INDUCTIVE COUPLING IN SERIES
    6. A.6 INDUCTIVE COUPLING IN PARALLEL
    7. A.7 AC OPERATION OF MAGNETIC CIRCUIT
    8. A.8 HYSTERESIS AND EDDY CURRENT LOSSES
  18. Appendix B: Reluctance Motor
  19. Appendix C: MMF of Distributed Winding
  20. Appendix D: Torques in AC and DC Machine
  21. Appendix E: Separation of No-load Losses of an Induction Motor
  22. Appendix F: Separation of Losses of an Induction Motor
  23. Appendix G: Tertiary Windings
  24. Appendix H: Solid State of Drives Control
    1. SPEED CONTROL OF DC AND AC DRIVE MOTORS
    2. SPEED CONTROL OF DC MACHINES
    3. DISADVANTAGES
    4. SINGLE-PHASE FULL-WAVE CONVERTER
    5. THREE-PHASE HALF-WAVE RECTIFIER CONTROL CIRCUIT
    6. POWER FACTOR
    7. THREE-PHASE HALF-CONTROLLED AND FULLY CONTROLLED BRIDGE CIRCUIT
    8. HARMONICS AND HEATING
    9. AC MOTOR CONTROL
    10. CHARACTERISTIC OF PHASE-CONTROLLED AC MOTOR
  25. Multiple Choice Questions
  26. References
  27. Index

Product information

  • Title: Electrical Machines, 2nd Edition
  • Author(s): Smarajit Ghosh
  • Release date: March 2012
  • Publisher(s): Pearson India
  • ISBN: 9789332503229