Livraria Tiraqui

Electric Machinery and Transformers

Bhag S. Guru,Huseyin R. Hiziroglu

Editora: Oxford University Press	ISBN: 9780195138900
Data Edição: 2001	Páginas: 700

Sinopse: Emphasis on pedagogy and student understanding with review of basic theory supported by numerous examples, illustrations and exercises. 
Encourages intuitive reasoning and problem-solving over rote memorization of equations and procedures. Provides a systematic development of electrical machine models based on both electromagnetic field and circuit theories, presenting the material in a systematic order: 1) explains the physical construction of a machine, 2) illustrates its windings and their placement, 3) describes the fundamental laws governing its operation, 4) justifies the assumptions imperative to develop the relevant theory, and 5) emphasizes the machine's limitations.
This is a revision of Guru/Hiziroglu: Electric Machinery and Transformers, 2/E. The text is designed for the standard third or fourth year (junior/senior) course in electrical engineering commonly called electric machinery or electromechanical energy conversion. This text discusses the principles behind building the primary infrastructure for the generation of electricity (such as hydroelectric dams, turbines, etc.) that supplies the energy needs of people throughout the world. In addition to power generation, the book covers the basics of various types of electric motors, from large electric train motors, to those in hair dryers and smaller devices. The largest markets for a book such as this will be found in countries with developing infrastructures. 
The text is best known for its accuracy, pedagogy, and clear writing style. This revision should make Electric Machinery and Transformers the most up-to-date text on the market. Electric Machinery and Transformers continues its strong pedagogical tradition with a wealth of examples, new exercises, review questions, and effective chapter summaries. 
Electric Machinery and Transformers begins with a review of the basics of circuit theory and electromagnetics. Chapter 3 begins the heart of the course with the principles of electromehcanical energy conversion; Chapter 4 covers transformers; Chapters 5 & 6 cover direct current generators and motors; Chapters 7 & 8 cover synchronous generators and motors. Chapters 9 and 10 round out the motors coverage with an introduction to polyphase induction motors and single-phase motors. Finally, Chapter 11 deals with dynamics of electrics machines and Chapter 12 covers special purpoe machines. 
This revised second edition features updated examples for modern applications, new problems, and additional material on power electronics.


Índice: 
Preface
Acknowledgments
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 Measurement
Summary
Review Questions
Problems
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
Summary
Review Questions
Problems
3. Principles of Electromechanical Energy Conversion
3.1: Introdcution
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
Summary
Review Quesitons
Problems
4 Tranformers
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 Tranformer 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
Summary
Review Questions
Problems
5 Direct-Current Generators
5.1: Introduction
5.2: Mechanical Construction
5.3: Armature Windings
5.4: Induced EMF Equations
5.5: Developed Torque
5.6: Magnetization Charateristic of a DC Machine
5.7: Theory of Communication
5.8: Armature Reaction
5.9: Types of DC Machines
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 Geneators
5.16: Maxiumum Efficiency Criterion
Summary
Review Questions
Problems
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
Summary
Review Questions
Problems
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 Characteristics
7.12: Salient-Pole Synchronous Generator
7.13: Parallel Operation of Synchronous Generators
Summary
Review Questions
Problems
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 Fact Correction
Summary
Review Questions
Problems
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 Tranformation
9.13: Speed Control of Induction Motors
9.14: Types of Induction Motors
Summary
Review Questions
Problems
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
Summary
Review Questions
Problems
11 Dynamics of Electricla Machines
11.1: Introduction
11.2: DC Machines
11.3: Synchronous Generator Dynamics
Summary
Review Questions
Problems
12 Special-Purpose Electric Machiens
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
Summary
Review Questions
Problems
Appendices
A System of Units
B The Laplace Transform
Bibliography
Index