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Electric Machinery and Transformers

Third Edition

Bhag S. Guru and Huseyin R. Hiziroglu

Publication Date - July 2000

ISBN: 9780195138900

720 pages
7-1/2 x 9-1/4 inches


Designed for junior- and senior-level courses in electromechanical energy conversion, Electric Machinery and Transformers, 3/e, continues the strong pedagogical tradition established by its successful previous editions. It begins with a review of the fundamentals of circuit theory and electromagnetics and then introduces the concept of electromechanical energy conversion. The text not only provides a systematic development of a model for each electric machine based upon established principles and basic laws, but also introduces students to applications and advanced topics. It also includes information on the construction of each electric machine.
Electric Machinery and Transformers, 3/e, enhances student learning of the basic operating principles of electric machines by using numerous supporting examples, review questions, illustrations, exercises, and chapter summaries. It encourages intuitive reasoning for problem-solving over the rote memorization of equations and procedures.
This third edition covers the following main topics: principles of electromechanical energy conversion; transformers; direct-current generators and motors; synchronous generators and motors; polyphase induction motors and single-phase motors; the dynamics of electric machines; and special-purpose machines.

Previous Publication Date(s)

December 1994
June 1995

Table of Contents

    1 Review of Electric Circuit Theory
    1.1. Introduction
    1.2. Direct-Current Ciruit Analysis
    1.3. Alternating-Current Circuit Analysis
    1.4. Three-Phase Circuits
    1.5. Power and Impendance Measurements
    Review Questions
    2 Review of Basic Laws of Electromagnetism
    2.1. Introduction
    2.2. Maxwell's Equations
    2.3. Magnetic Materials and Their Properties
    2.4. Magnetic Circuits
    2.5. Self and Mututal Inductances
    2.6. Magnetically Coupled Coils
    2.7. Magnetic Losses
    2.8. Permanent Magnets
    Review Questions
    3 Principles of Electromechanical Energy Conversion
    3.1. Introduction
    3.2. Electric Field as a Medium
    3.3. Magnetic Field as a Medium
    3.4. A Coil in a Uniform Magnetic Field
    3.5. A Coil in a Time-Varying Magnetic Field
    3.6. Synchronous Motor
    3.7. Reluctance Motor
    3.8. Electromagnetic Relays
    Review Questions
    4 Transformers
    4.1. Introduction
    4.2. Construction of a Transformer
    4.3. An Ideal Transformer
    4.4. A Nonideal Transformer
    4.5. Voltage Regulation
    4.6. Maximum Efficiency Criterion
    4.7. Determination of Transformer Parameters
    4.8. Per-Unit Computations
    4.9. The Autotransformer
    4.10. Three-Phase Transformers
    4.11. The Constant-Current Transformer
    4.12. Instrument Transformers
    Review Questions
    5 Direct-Current Generators
    5.1. Introduction
    5.2. Mechanical Construction
    5.3. Armature Windings
    5.4. Induced emf Equation
    5.5. Developed Torque
    5.6. Magnetization Charateristic of a DC Machine
    5.7. Theory of Commutation
    5.8. Armature Reaction
    5.9. Types of DC Generators
    5.10. Voltage Regulation
    5.11. Losses in DC Machines
    5.12. A Separately Excited DC Generator
    5.13. A Shunt Generator
    5.14. A Series Generator
    5.15. Compound Generators
    5.16. Maxiumum Efficiency Criterion
    Review Questions
    6 Direct-Current Motors
    6.1. Introduction
    6.2. Operation of a DC Motor
    6.3. Speed Regulation
    6.4. Losses in a DC Motor
    6.5. A Series Motor
    6.6. A Shunt Motor
    6.7. The Compound Motor
    6.8. Methods of Speed Control
    6.9. The Ward-Leonard System
    6.10. Torque Measurements
    6.11. Braking or Reversing DC Motors
    Review Questions
    7 Synchronous Generators
    7.1. Introduction
    7.2. Construction of a Synchronous Machine
    7.3. Armature Windings
    7.4. Pitch Factor
    7.5. Distribution Factor
    7.6. Winding Connections
    7.7. Induced emf Equation
    7.8. The Equivalent Circuit
    7.9. Power Relationships
    7.10. Synchronous Generator Tests
    7.11. The External Characteristic
    7.12. Salient-Pole Synchronous Generator
    7.13. Parallel Operation of Synchronous Generators
    Review Questions
    8 Synchronous Motors
    8.1. Introduction
    8.2. Construction and Operation of a Synchronous Motor
    8.3. Equivalent Circuit of a Synchronous Motor
    8.4. Power Expressions
    8.5. Exact Condition for Maximum Power
    8.6. Effect of Excitation
    8.7. Power Factor Correction
    Review Questions
    9 Polyphase Induction Motors
    9.1. Introduction
    9.2. Construction
    9.3. Principle of Operation
    9.4. Development of an Equivalent Circuit
    9.5. An Approximate Equivalent Circuit
    9.6. Maximym Power Criterion
    9.7. Maximum Torque Criterion
    9.8. Maximum Efficiency Criterion
    9.9. Some Important Conclusions
    9.10. Equivalent Circuit Parameters
    9.11. Starting of Induction Motors
    9.12. Rotor Impedence Transformation
    9.13. Speed Control of Induction Motors
    9.14. Types of Induction Motors
    Review Questions
    10 Single-Phase Motors
    10.1. Introduction
    10.2. Singe-Phase Induction Motor
    10.3. Analysis of a Single-Phase Induction Motor
    10.4. Types of Single-Phase Induction Motors
    10.5. Analysis of a Single-Phase Motor Using Both Windings
    10.6. Testing Single-Phase Motors
    10.7. Shaded-Pole Motor
    10,8. Universal Motor
    Review Questions
    11 Dynamics of Electric Machines
    11.1. Introduction
    11.2. DC Machine Dynamics
    11.3. Synchronous Generator Dynamics
    Review Questions
    12 Special-Purpose Electric Machines
    12.1. Introduction
    12.2. Permanent-Magnet Motors
    12.3. Step Motors
    12.4. Switched-Reluctance Motors
    12.5. Brushless DC Motors
    12.6. Hystersis Motors
    12.7. Linear Induction Motors
    Review Questions
    A System of Units
    B The Laplace Transform