Principles of Electrical Machines provides a comprehensive discourse on the characteristics and working principles of various types of electrical machines. Starting with magnetic circuits which form an integral part of electrical machines, the book goes on to cover transformers and the general principles of energy conversion. The book then extensively discusses different types of electrical machines - dc machines, three-phase induction machines, and three-phase synchronous machines; single-phase motors, which are widely used in household and office appliances; and special motors such as servomotors, linear synchronous motors, brushless DC motors, switched reluctance motors, synchro motors, and stepper motors. Using a gradational approach, the first few sections in each chapter are devoted to the basic principles of operation, and later sections are devoted mostly to a more detailed study of the particular machine.
In addition to strengthening the organization of the contents, this International adaptation provides new and updated materials, and is well supported by a plethora of new examples, illustrations, end-of-chapter problems, and multiple choice questions.Table of Contents
CHAPTER 1: MAGNETIC CIRCUITS
1.1 MAGNETIC CIRCUITS
1.2 HYSTERESIS
1.3 RELATIONSHIP BETWEEN FLUX, EMF AND FORCE
1.4 SINUSOIDAL EXCITATION
1.5 PERMANENT MAGNET
CHAPTER 2: TRANSFORMERS
2.1 IDEAL TRANSFORMER
2.2 PRACTICAL TRANSFORMER
2.3 VOLTAGE REGULATION
2.4 EFFICIENCY
2.5 TESTS ON TRANSFORMERS
2.6 AUTOTRANSFORMER
2.7 THREE-PHASE TRANSFORMERS
2.8 HARMONICS IN THREE-PHASE TRANSFORMER BANKS
2.9 THREE WINDING TRANSFORMERS
2.10 PARALLEL OPERATION AND LOAD SHARING OF SINGLE PHASE AND THREE PHASE TRANSFORMERS
2.11 TAP CHANGING TRANSFORMERS
2.12 PER-UNIT (PU) SYSTEM
2.13 HEATING AND COOLING OF TRANSFORMERS
2.14 APPLICATIONS OF TRANSFORMERS
CHAPTER 3: ELECTROMECHANICAL ENERGY CONVERSION
3.1 ENERGY CONVERSION PROCESS
3.2 FIELD ENERGY
3.3 MECHANICAL FORCE IN THE ELECTROMAGNETIC SYSTEM
3.4 ROTATING MACHINES
3.5 CYLINDRICAL MACHINES
CHAPTER 4: MACHINE WINDINGS, MMF DISTRIBUTION, AND MAGNETIC FIELDS
4.1 WINDING ARRANGEMENT
4.2 PULSATING AND ROTATING MAGNETIC FIELDS
4.3 SPACE HARMONICS
4.4 TIME HARMONICS
CHAPTER 5: DC MACHINES
5.1 ELECTROMAGNETIC CONVERSION
5.2 DC MACHINES
5.3 DC GENERATORS
5.4 DC MOTORS
5.5 SPEED CONTROL
5.6 PERMANENT MAGNET DC (PMDC) MOTORS
5.7 BRAKING OF DC MOTORS
5.8 PRINTED CIRCUIT BOARD (PCB) MOTORS
CHAPTER 6: INDUCTION (ASYNCHRONOUS) MACHINES
6.1 CONSTRUCTIONAL FEATURES
6.2 INDUCED VOLTAGES
6.3 POLYPHASE INDUCTION MACHINE
6.4 THREE MODES OF OPERATION
6.5 INVERTED INDUCTION MACHINE
6.6 EQUIVALENT CIRCUIT MODEL
6.7 NO-LOAD TEST, BLOCKED-ROTOR TEST, AND EQUIVALENT CIRCUIT PARAMETERS
6.8 PERFORMANCE CHARACTERISTICS
[Separation of Iron Loss and Friction and Windage Loss of the Induction Motor]
6.9 POWER FLOW IN THREE MODES OF OPERATION
6.10 CIRCLE DIAGRAM FOR THE INDUCTION MACHINE
6.11 EFFECTS OF ROTOR RESISTANCE
6.12 CLASSES OF SQUIRREL-CAGE MOTORS
6.13 SPEED CONTROL
6.14 STARTING OF INDUCTION MOTORS
6.15 TIME AND SPACE HARMONICS
6.16 LINEAR INDUCTION MOTOR (LIM)
CHAPTER 7: SYNCHRONOUS MACHINES
7.1 CONSTRUCTION OF THREE-PHASE SYNCHRONOUS MACHINES
7.2 SYNCHRONOUS GENERATORS
7.3 SYNCHRONOUS MOTORS
7.4 EQUIVALENT CIRCUIT MODEL
7.5 POWER AND TORQUE CHARACTERISTICS
7.6 CAPABILITY CURVES
7.7 POWER FACTOR CONTROL
7.8 INDEPENDENT GENERATORS
7.9 PARALLEL OPERATION AND LOAD SHARING OF GENERATORS
7.10 SALIENT POLE SYNCHRONOUS MACHINES
7.11 SPEED CONTROL OF SYNCHRONOUS MOTORS
7.12 APPLICATIONS
CHAPTER 8: SINGLE-PHASE MOTORS
8.1 SINLE-PHASE INDUCTION MOTORS
8.2 STARTING WINDING DESIGN
8.3 EQUIVALENT CIRCUIT OF A CAPACITOR-RUN MOTOR
8.4 SINGLE-PHASE SERIES (UNIVERSAL) MOTORS
8.5 SINGLE-PHASE SYNCHRONOUS MOTORS
8.6 SPEED CONTROL
CHAPTER 9: SPECIAL MACHINES
9.1 SERVOMOTORS
9.2 LINEAR SYNCHRONOUS MOTOR (LSM)
9.3 BRUSHLESS DC (BLDC) MOTORS
9.4 SWITCHED RELUCTANCE MOTORS (SRM)
9.5 SYNCHROS
9.6 STEPPER MOTORS
APPENDIX A: BALANCED THREE-PHASE CIRCUITS
APPENDIX B: UNITS AND CONSTANTS
APPENDIX C: LAPLACE TRANSFORMS
APPENDIX D: ANSWERS TO SELECTED
PROBLEMS
INDEX
