This seventh edition of Fitzgerald and Kingsley's Electric Machinery by Stephen Umans was developed recognizing the strength of this classic text since its first edition has been the emphasis on building an understanding of the fundamental physical principles underlying the performance of electric machines.
Much has changed since the publication of the first edition, yet the basic physical principles remain the same, and this seventh edition is intended to retain the focus on these principles in the context of today's technology.
Author(s): Stephen D. Umans
Series: Electrical Engineering
Edition: 7th edition
Publisher: McGraw-Hill Education
Year: 2013
Language: English
Pages: 722
Cover Page......Page 1
Title Page......Page 2
Copyright Page......Page 3
Dedication......Page 4
About the Author......Page 5
BRIEF CONTENTS......Page 6
Table of Content......Page 7
Preface......Page 10
Chapter 1 Magnetic Circuits and Magnetic Materials......Page 16
1.1 Introduction to Magnetic Circuits......Page 17
1.2 Flux Linkage, Inductance, and Energy......Page 26
1.3 Properties of Magnetic Materials......Page 34
1.4 AC Excitation......Page 37
1.5 Permanent Magnets......Page 44
1.6 Application of Permanent-MagnetMaterials......Page 49
1.7 Summary......Page 60
1.8 Chapter 1 Variables......Page 61
1.9 Problems......Page 62
2.1 Introduction to Transformers......Page 78
2.2 No-Load Conditions......Page 80
2.3 Effect of Secondary Current; Ideal Transformer......Page 85
2.4 Transformer Reactances and Equivalent Circuits......Page 89
2.5 Engineering Aspects of Transformer Analysis......Page 93
2.6 Autotransformers; Multiwinding Transformers......Page 102
2.7 Transformers in Three-Phase Circuits......Page 106
2.8 Voltage and Current Transformers......Page 111
2.9 The Per-Unit System......Page 116
2.10 Summary......Page 124
2.11 Chapter 2 Variables......Page 125
2.12 Problems......Page 127
Chapter 3 Electromechanical-Energy-Conversion Principles......Page 137
3.1 Forces and Torques in Magnetic-Field Systems......Page 138
3.2 Energy Balance and the Energy Method......Page 141
3.3 Energy in Singly Excited Magnetic-Field Systems......Page 144
3.4 Determination of Magnetic Force and Torque from Energy......Page 148
3.5 Determination of Magnetic Force and Torque from Coenergy......Page 154
3.6 Multiply Excited Magnetic-Field Systems......Page 161
3.7 Forces and Torques in Systems with Permanent Magnets......Page 167
3.8 Dynamic Equations......Page 176
3.9 Analytical Techniques......Page 180
3.10 Summary......Page 186
3.11 Chapter 3 Variables......Page 187
3.12 Problems......Page 188
4.1 Elementary Concepts......Page 205
4.2 Introduction to AC and DC Machines......Page 208
4.3 MMF of Distributed Windings......Page 217
4.4 Magnetic Fields in Rotating Machinery......Page 227
4.5 Rotating MMF Waves in AC Machines......Page 231
4.6 Generated Voltage......Page 238
4.7 Torque in Non-Salient-Pole Machines......Page 244
4.8 Linear Machines......Page 256
4.9 Magnetic Saturation......Page 259
4.10 Leakage Flux......Page 262
4.11 Summary......Page 264
4.12 Chapter 4 Variables......Page 266
4.13 Problems......Page 267
5.1 Introduction to Polyphase Synchronous Machines......Page 277
5.2 Synchronous-Machine Inductances; Equivalent Circuits......Page 280
5.3 Open- and Short-Circuit Characteristics......Page 289
5.4 Steady-State Power-Angle Characteristics......Page 299
5.5 Steady-State Operating Characteristics......Page 308
5.6 Effects of Salient Poles; Introduction to Direct-and Quadrature-Axis Theory......Page 321
5.7 Power-Angle Characteristics of Salient-Pole Machines......Page 327
5.8 Permanent-Magnet AC Machines......Page 334
5.9 Summary......Page 345
5.10 Chapter 5 Variables......Page 346
5.11 Problems......Page 347
6.1 Introduction to Polyphase Induction Machines......Page 359
6.2 Currents and Fluxes in Polyphase Induction Machines......Page 363
6.3 Induction-Motor Equivalent Circuit......Page 366
6.4 Analysis of the Equivalent Circuit......Page 370
6.5 Torque and Power by Use of Thevenin’s Theorem......Page 375
6.6 Parameter Determination from No-Load and Blocked-Rotor Tests......Page 385
6.7 Effects of Rotor Resistance; Wound and Double-Squirrel-Cage Rotors......Page 396
6.8 Summary......Page 403
6.9 Chapter 6 Variables......Page 404
6.10 Problems......Page 405
7.1 Introduction......Page 418
7.2 Commutator Action......Page 426
7.3 Analytical Fundamentals: Electric-Circuit Aspects......Page 428
7.4 Effect of Armature MMF......Page 432
7.5 Analytical Fundamentals: Magnetic-Circuit Aspects......Page 435
7.6 Steady-State DC Machine Performance......Page 443
7.7 Permanent-Magnet DC Machines......Page 451
7.8 Commutation and Interpoles......Page 457
7.9 Compensating Windings......Page 459
7.10 Series Universal Motors......Page 461
7.11 Summary......Page 462
7.12 Chapter 7 Variables......Page 463
7.13 Problems......Page 465
Chapter 8 Variable-Reluctance Machines and Stepping Motors......Page 475
8.1 Basics of VRM Analysis......Page 476
8.2 Practical VRM Configurations......Page 483
8.3 CurrentWaveforms for Torque Production......Page 489
8.4 Nonlinear Analysis......Page 502
8.5 Stepping Motors......Page 510
8.6 Summary......Page 518
8.8 Problems......Page 520
9.1 Single-Phase Induction Motors: Qualitative Examination......Page 525
9.2 Starting and Running Performance of Single-Phase Induction and Synchronous Motors......Page 528
9.3 Revolving-Field Theory of Single-Phase Induction Motors......Page 536
9.4 Two-Phase Induction Motors......Page 543
9.5 Summary......Page 561
9.6 Chapter 9 Variables......Page 562
9.7 Problems......Page 563
Chapter 10 Speed and Torque Control......Page 568
10.1 Control of DC Motors......Page 569
10.2 Control of Synchronous Motors......Page 587
10.3 Control of Induction Motors......Page 612
10.4 Control of Variable-Reluctance Motors......Page 630
10.5 Summary......Page 634
10.6 Chapter 10 Variables......Page 635
10.7 References......Page 636
10.8 Problems......Page 637
A.1 Generation of Three-Phase Voltages......Page 650
A.2 Three-Phase Voltages, Currents, and Power......Page 653
A.3 Y- and -Connected Circuits......Page 657
A.4 Analysis of Balanced Three-Phase Circuits; Single-Line Diagrams......Page 662
A.5 Appendix A Variables......Page 665
B.1 Generated Voltages......Page 666
B.2 Armature MMF Waves......Page 672
B.3 Air-Gap Inductances of Distributed Windings......Page 675
B.4 Appendix B Variables......Page 678
C.1 Transformation to Direct- and Quadrature-Axis Variables......Page 679
C.2 Basic Synchronous-Machine Relations in dq0 Variables......Page 682
C.3 Basic Induction-Machine Relations in dq0 Variables......Page 686
C.4 Appendix C Variables......Page 689
D.1 Losses......Page 691
D.2 Rating and Heating......Page 694
D.3 Cooling Means for Electric Machines......Page 697
D.4 Excitation......Page 699
D.5 Energy Efficiency of Electric Machinery......Page 701
Appendix E Table of Constants and Conversion Factors for SI Units......Page 703
Index......Page 704
Back Cover......Page 722
