Electric Machinery and Transformers, 3e, continues the strong pedagogical tradition established by its successful previous editions. The text encourages intuitive reasoning for problem-solving over the rote memorization of equations and procedures. It begins with a review of the fundamentals of circuit theory and electromagnetics and then introduces the concept of electromechanical energy conversion. In addition, it provides a systematic development of a model for each electric machine based upon established principles and basic laws and goes on to introduce applications and advanced topics. Including numerous supporting examples, review questions, illustrations, exercises, and chapter summaries, Electric Machinery and Transformers, 3e, is ideal for advanced undergraduate courses in electromechanical energy conversion. Key Features: • 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 5) emphasizes the machine's limitations • Presents a comprehensive treatment of light emitting diodes, which are rapidly replacing classical lighting sources • Covers new topics such as organic material (including various polymers) and artificial materials (including photonic gap materials and metamaterials) • Provides insight into cutting-edge fields such as amorphous semiconductors and nanotechnology • Discusses new devices including nanotube transistors, single electron transistors, magnetic tunnel junctions, quantum cascade lasers, and ferroelectric and superconducting memories Contents: Preface Acknowledgments 1. Review of Electric Circuit Theory 2. Review of Basic Laws of Electromagnetism 3. Principles of Electromechanical Energy Conversion 4. Transformers 5. Direct-Current Generators 6. Direct-Current Motors 7. Synchronous Generators 8. Synchronous Motors 9. Polyphase Induction Motors 10. Single-Phase Motors 11. Dynamics of Electric Machines 12. Special-Purpose Electric Machines Appendices: System of Units The Laplace Transform Bibliography Index Ancillary material: • Instructor's Manual (0195138910) • PowerPoint CD

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 Measurements 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. 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 Summary Review Questions Problems 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 Summary Review Questions Problems 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 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 Characteristic 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 Factor 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 Transformation 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 Electric Machines 11.1. Introduction 11.2. DC Machine Dynamics 11.3. Synchronous Generator Dynamics Summary Review Questions Problems 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 Summary Review Questions Problems Appendices A System of Units B The Laplace Transform Bibliography Index

Third Edition Bhag S. Guru and Huseyin R. Hiziroglu, both at Kettering University