Electric machinery [6th ed] 0073660094, 9780073660097, 0071121935

Table of contents :
Front Matter......Page 1
About the Authors......Page 5
Preface......Page 6
Table of Contents......Page 0
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 38
1.5 Permanent Magnets......Page 45
1.6 Application of Permanent Magnet Materials......Page 50
1.7 Summary......Page 57
1.8 Problems......Page 58
2.1 Introduction to Transformers......Page 72
2.2 No-Load Conditions......Page 75
2.3 Effect of Secondary Current; Ideal Transformer......Page 79
2.4 Transformer Reactances and Equivalent Circuits......Page 83
2.5 Engineering Aspects of Transformer Analysis......Page 88
2.6 Autotransformers; Multiwinding Transformers......Page 96
2.7 Transformers in Three-Phase Circuits......Page 100
2.8 Voltage and Current Transformers......Page 105
2.9 The Per-Unit System......Page 110
2.10 Summary......Page 118
2.11 Problems......Page 119
3. Electromechanical-Energy-Conversion Principles......Page 127
3.1 Forces and Torques in Magnetic Field Systems......Page 128
3.2 Energy Balance......Page 132
3.3 Energy in Singly-Excited Magnetic Field Systems......Page 134
3.4 Determination of Magnetic Force and Torque from Energy......Page 138
3.5 Determination of Magnetic Force and Torque from Coenergy......Page 144
3.6 Multiply-Excited Magnetic Field Systems......Page 151
3.7 Forces and Torques in Systems with Permanent Magnets......Page 157
3.8 Dynamic Equations......Page 166
3.9 Analytical Techniques......Page 170
3.10 Summary......Page 173
3.11 Problems......Page 174
4.1 Elementary Concepts......Page 188
4.2 Introduction to AC and DC Machines......Page 191
4.3 MMF of Distributed Windings......Page 202
4.4 Magnetic Fields in Rotating Machinery......Page 212
4.5 Rotating MMF Waves in AC Machines......Page 216
4.6 Generated Voltage......Page 223
4.7 Torque in Nonsalient-Pole Machines......Page 229
4.8 Linear Machines......Page 242
4.9 Magnetic Saturation......Page 245
4.10 Leakage Fluxes......Page 248
4.11 Summary......Page 250
4.12 Problems......Page 252
5.1 Introduction to Polyphase Synchronous Machines......Page 260
5.2 Synchronous-Machine Inductances; Equivalent Circuits......Page 263
5.3 Open- and Short-Circuit Characteristics......Page 271
5.4 Steady-State Power-Angle Characteristics......Page 281
5.5 Steady-State Operating Characteristics......Page 290
5.6 Effects of Salient Poles; Introduction to Direct- and Quadrature-Axis Theory......Page 296
5.7 Power-Angle Characteristics of Salient-Pole Machines......Page 304
5.8 Permanent-Magnet AC Motors......Page 308
5.9 Summary......Page 310
5.10 Problems......Page 312
6.1 Introduction to Polyphase Induction Machines......Page 321
6.2 Currents and Fluxes in Polyphase Induction Machines......Page 326
6.3 Induction-Motor Equivalent Circuit......Page 328
6.4 Analysis of the Equivalent Circuit......Page 332
6.5 Torque and Power by Use of Thevenin's Theorem......Page 337
6.6 Parameter Determination from No-Load and Blocked-Rotor Tests......Page 345
6.7 Effects of Rotor Resistance; Wound and Double-Squirrel-Cage Rotors......Page 355
6.8 Summary......Page 362
6.9 Problems......Page 363
7.1 Introduction......Page 372
7.2 Commutator Action......Page 379
7.3 Effect of Armature MMF......Page 382
7.4 Analytical Fundamentals: Electric-Circuit Aspects......Page 385
7.5 Analytical Fundamentals: Magnetic-Circuit Aspects......Page 389
7.6 Analysis of Steady-State Performance......Page 394
7.7 Permanent-Magnet DC Machines......Page 399
7.8 Commutation and Interpoles......Page 405
7.9 Compensating Windings......Page 408
7.10 Series Universal Motors......Page 410
7.11 Summary......Page 411
7.12 Problems......Page 412
8. Variable-Reluctance Machines and Stepping Motors......Page 422
8.1 Basics of VRM Analysis......Page 423
8.2 Practical VRM Configurations......Page 430
8.3 Current Waveforms for Torque Production......Page 436
8.4 Nonlinear Analysis......Page 445
8.5 Stepping Motors......Page 452
8.6 Summary......Page 461
8.7 Problems......Page 463
9.1 Single-Phase Induction Motors: Qualitative Examination......Page 467
9.2 Starting and Running Performance of Single-Phase Induction and Synchronous Motors......Page 470
9.3 Revolving-Field Theory of Single-Phase Induction Motors......Page 478
9.4 Two-Phase Induction Motors......Page 485
9.5 Summary......Page 503
9.6 Problems......Page 504
10. Introduction to Power Electronics......Page 508
10.1 Power Switches......Page 509
10.2 Rectification: Conversion of AC to DC......Page 522
10.3 Inversion: Conversion of DC to AC......Page 553
10.4 Summary......Page 565
10.6 Problems......Page 567
11.1 Control of DC Motors......Page 574
11.2 Control of Synchronous Motors......Page 593
11.3 Control of Induction Motors......Page 610
11.4 Control of Variable-Reluctance Motors......Page 628
11.5 Summary......Page 631
11.7 Problems......Page 633
A.1 Generation of Three-Phase Voltages......Page 643
A.2 Three-Phase Voltages, Currents, and Power......Page 646
A.3 Y- and Delta-Connected Circuits......Page 650
A.4 Analysis of Balanced Three-Phase Circuits; Single-Line Diagrams......Page 656
A.5 Other Polyphase Systems......Page 658
B.1 Generated Voltages......Page 659
B.2 Armature MMF Waves......Page 665
B.3 Air-Gap Inductances of Distributed Windings......Page 668
C.1 Transformation to Direct- and Quadrature-Axis Variables......Page 672
C.2 Basic Synchronous-Machine Relations in dq0 Variables......Page 675
C.3 Basic Induction-Machine Relations in dq0 Variables......Page 679
D.1 Losses......Page 683
D.2 Rating and Heating......Page 685
D.3 Cooling Means for Electric Machines......Page 689
D.4 Excitation......Page 691
D.5 Energy Efficiency of Electric Machinery......Page 693
Appendix E: Table of Constants and Conversion Factors for SI Units......Page 695
C......Page 696
E......Page 697
I......Page 698
M......Page 699
P......Page 700
S......Page 701
T......Page 702
Z......Page 703