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Generalized Theory of Electrical Machines

Generalized Theory of Electrical Machines



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Book Information

Publisher:Khanna Publishers
Published In:2011
Binding Type:Paperback
Weight:2.65 lbs
Pages:pp. [xii] + 1151, Figures, Tables, Graphs, Index, Appendices

is written by P.S. Bimbhra. The publisher of this title is Khanna Publishers.

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About the Book

This Book "Generalized Theory of Electrical Machines" is designed as a textbook for the readers who have already studied the basics of common types of Electrical Machines. In this book, an attempt has been made to unify the treatment of Rotating Electrical Machines. The topics included in this book are Elements of Generalized Theory, Linear Transformations in Machines, DC Machines, Polyphase Synchronous Machines, Polyphase Induction Machines, Single Phase Motors, AC Commutator Motors and Transformers. An entirely new chapter is added in the present edition to deal with stepping motors, brushless dc motors and variable reluctance motors along with a wide variety of objective type of questions and answers.

About the Author

Dr. RS. Bimbhra retired as Professor of Electrical and Electronics Engineering from Thapar Institute of Engineering and Technology (Deemed University), Patiala-147004. He has over 40 years of teaching and research experience in Electrical Engineering. He has published several papers in renowned journals at national and international conferences. Dr. Bimbhra is a fellow of I.E. (India), a member of I.E.E. (U.K.) and a life member of I.S.T.E.


1. Essentials of Rotating Electrical Machines
2. Conventions
3. The Basic Two-pole Machine
4. The Per Unit System
5. Transformer with a Movable Secondary
6. Transformer and Speed Voltages in the Armature
7. Kron's Primitive Machine
8. Analysis of Electrical Machines Problems

1. Invariance of Power
2. Transformation from a Displaced Brush-Axis
3. Transformation from Three Phases to Two Phases (a, b, C to a, P, 0)
4. Transformation from Rotating axes (a, P, 0) to Stationary axes (d, q, 0)
5. Physical Concepts of Park's Transformations
6. Transformed Impedance Matrix
7. How To Apply Generalized Theory
8. Electrical Torque
9. Restrictions of the Generalized Theory of Machines Problems

1. Separately Excited d. c. Generators
2. Separately-Excited d. c. Motors
3. Interconnection of Machines
4. Transfer Functions of d. c. Machines
5. D. C. Series Motor
6. D. C. Shunt Machines
7. D. C. Compound Machine
3.8. Linearization Techniques for Small Perturbations
9. Cross Field Machines
10. Transfer Functions of Cross-field Machines
11. Parallel Operation of d. c. Generators
12. Electric Braking of D. C. Motors
13. Some Worked Examples Problems

1. Basic Synchronous-machine Parameters
2. General Machine Equations
3. Three-phase Synchronous Machine (with no Amortis-sours)
4. Balanced Steady-State Analysis
5. Steady-state Power-angle Characteristics
6. Short-circuit Ratio
7. Transient Analysis
8. Transient Torque
9. Sudden Reactive Loading and Unloading
10. Transient Analysis-a qualitative approach
11. Reactances and Time-Constants from Equivalent Circuits
12. Concepts of Synchronous Machine Reactances
13. Measurement of Reactances
14. Reactances and Time-constants from Short-circuit Oscil-logram
15. Transient Power-angle Characteristics
16. Phaser Diagrams under Transient and Subtransient Conditions
17. Synchronous-machine Dynamics (or Electro-mechanical
18. Large Angular Oscillations
19. Synchronizing
20. Parallel Operation of Two Alternators
21. Synchronous Machine on an Infinite Bus
22. DWR Synchronous Generator
23. Inductor Alternators
24. Electric Braking of Synchronous Motors
25. Some Worked Examples Problems

1. Transformations
2. Electrical Performance Equations
3. Analysis of the Equivalent Circuit
4. Torque-slip Characteristics
5. Effect of Voltage and Frequency Variations on the Induction Motor Performance
6. High-torque Cage Motors
7. Induction Machine Dynamics
8. Speed Control of Induction Motors
9. Slip-Power-Recovery Schemes for Induction Motor Speed Control
10. Frequency Converters (or changers)
11. Leblanc System of Speed Control
12. Kramer System of Speed Control
13. Static Kramer Drive
14. Electrical Braking of Induction Motors
15. Operation on Unbalanced Supply Voltage
16. Slot Harmonics
17. Effect of Space Harmonics on 3-phase Induction-motor
18. Linear Electric Motors


1. Single-phase Induction Motors
2. Revolving Field Theory of Single-phase Induction Motors
3. Equivalent Circuit for a Single-Phase Induction Motor
4. Cross-field Theory of Single-phase Induction Motors
5. Starting Methods of Single-Phase Induction Motors
6. Maximum Starting Torque Conditions in Single phase Induction Motors
7. Single-Phase Synchronous Motors
8. Two-phase Servomotors
9. AC Tachometers


1. E. m. fs. Induced in Commutator Windings
2. Torque
3. Commutation in A. C. Machines
4. Single-phase Series Motors
5. Repulsion Motor
6. Doubly-fed Motor
7. Schrage Motor
8. Scherbius Machine
9. Summary


1. Three-phase Transformers
2. Three-phase Transformer Connections and Phasor Groups
3. Parallel Operation of Three-phase Transformers
4. Excitation Phenomena in Transformers
5. Unbalanced Operation of Three-phase Transformers
6. Open-delta or V-connection
7. Testing of 3-phase Transformer Bank for Proper Connections
8. Choice of Transformers for Three-phase Circuits
9. Three-phase to Two-phase Conversion (Scott Connection)
10. Three-phase to Six and Twelve Phase Conversions
11. Multicircuit Transformers
12. Three-phase Auto-transformers
13. Sequence Impedances of Transformers
14. Transformer Transients
15. Overvoltages in Transformers
16. Mechanical Forces in Transformers
17. The Per Unit System
18. Transformers in Three-phase Circuits


9.1. Stepping Motors
9.2. Brushless DC Motors
9.3. Variable-Reluctance Motors


List Of Appendix

1. Objective Type Questions and Answers

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