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1 Magnetic Systems
1.1 Magnetic Field Concepts
1.2 Equivalent Magnetic and Electric Circuits
1.3 Energy in a Magnetic Field
1.4 Ferromagnetism
1.5 Magnetization
1.6 Hysteresis
1.7 Hysteresis Loss
1.8 Eddy Current Loss
1.9 Core Losses
1.10 Alternating Excitation
1.11 Production of Magnetic Flux in Air Gap
1.12 Modeling of Magnetic System
Problems
General References
2 Transformers
2.1 Ideal Transformers
2.1.1 Transformation of Electric Circuit Elements
2.2 Equivalent Circuit of a Transformer
2.2.1 Winding Resistances
2.2.2 Magnetizing Inductance
2.2.3 Core Losses
2.2.4 Leakage Inductance
2.3 Transformer Rating
2.3.1 Per Unit Values
2.4 Measurement of Transformer Parameters
2.5 Transformer Performance
Problems
General References
3 Basic Principles of Electric Machines
3.1 Forces on Electric Currents
3.2 Forces on Ferromagnetic Material
3.3 Elementary Rotating Machine
3.4 Placing Conductors in Slots
3.5 Some Elementary Types of Electric Machines
3.6 Ferromagnetic Actuator
3.7 Reluctance Machines
Problems
General References
4 Commutator Machines
4.1 Magnetic System
4.2 Rotor Windings and Commutator
4.3 Torque and Generated Voltage
4.4 Equivalent Circuit
4.5 Steady-State Performance
4.6 Motors Operating on Constant Voltage Supply
4.7 Operation as a Generator
Problems
General References
5 Induction Machines
5.1 Sinusoidally Distributed Windings
5.2 Rotatinf Magnetic Field
5.3 Flux Linkage and Magnetizing Inductance
5.4 Torque Production with Squirrel Cage Rotor
5.5 Equivalent Circuit Near Synchronous Speed
5.6 Machines with Multiple Pole Pairs
5.7 Leakage Inductance and Maximum Torque
5.8 Rotor Design for Starting Torque
5.9 Single-Phase Induction Motors
Problems
General References
6 Synchronous Machines
6.1 Cylindrical Wound-Field Machines
6.2 Steady-State Equivalent Circuit
6.3 Steady-State Operation
6.4 Starting and Excitation of Synchronous Machines
6.5 Measurement of Parameters
6.6 Permanent Magnet Synchronous Machines
6.7 Electronically Switched Permanent Magnet Motors
Problems
General References
7 Magnetic Systems and Transformers ‒ Revisited
7.1 Analysis of Complex Magnetic Systems
7.1.1 Equivalent Circuits
7.1.2 Equivalent Circuit for a Two-Winding Shell-Type Transformer
7.1.3 Synthesis of Magnetic Devices
7.1.4 Determination of Leakage Inductance from Dimensions
7.2 Design of Inductors and Transformers
7.2.1 Heat Transfer
7.2.2 Inductor Design
7.2.3 Transformer Design
7.3 Design of Permanent-Magnet Devices
7.4 Variable-Frequency Operation of Transformers
7.5 Transient Inrush Current of a Transformer
7.6 Transformers for Polyphase Systems
7.6.1 Connections of Transformers for Three-Phase Systems
7.6.2 Polyphase Transformers
7.7 Some Special Transformation Devices
7.7.1 Autotransformers
7.7.2 Instrument Transformers
7.8 Forces in Saturable Magnetic Devices
Problems
General References
8 Power Semiconductor Converters
8.1 Power Switching Devices
8.2 Controlled Rectifier Systems
8.2.1 Single-Phase Controlled Rectifier
8.2.2 Three-Phase Controlled Rectifier
8.3 Choppers
8.3.1 Step-Down Choppers
8.3.2 Step-Up Choppers
8.3.3 Two- and Four-Quadrant Choppers
8.4 Inverters
8.4.1 A Simple Voltage-Source Inverter
8.4.2 Pulse-Width-Modulated Voltage-Source Inverters
8.4.3 Current-Source Inverters
8.5 Cycloconverters
Problems
General References
9 Commutator Motor Drives
9.1 Mechanical System Modeling
9.2 Dynamic Relations for Drive Systems
9.3 Closed-Loop Speed Control
9.4 Position Control
9.5 Chopper Drives
9.6 Controlled Rectifier Drives
9.7 Series Commutator Motors
9.8 Armature Reaction and Commutation
Problems
General References
10 Induction Motor Drives
10.1 A Transient Model of the Induction Machine
10.1.1 An Alternative Form of Transient Model
10.1.2 Instantaneous Power and Torque Relations
10.1.3 Steady-State Analysis
10.1.4 Modeling of Saturation Effects
10.1.5 Modeling of Deep Rotor Bar Effects
10.2 Variable-Voltage, Variable-Frequency Operation 422
10.2.1 Fundamental-Frequency Performance 423
10.2.2 Effects of Voltage Harmonics 428
10.2.3 Closed-Loop Speed Control 433
10.3 Variable-Current, Variable-Frequency Operation 4
10.4 Variable-Voltage, Constant-Frequency Operation
10.5 Speed Control by Rotor-Power Recovery
10.6 Unbalanced Operation
10.6.1 Operation with One Phase Open
10.7 Practical Windings and Space Harmonics
10.8 Linear Induction Motors
Problems
General References
11 Synchronous Generators, Motors, and Drives
11.1 Modeling of Synchronous Machines
11.1.1 Cylindrical-Rotor Machines
11.1.2 Representation of Magnetic Saturation
11.1.3 Modeling of Saliency
11.1.4 Measurement of Parameters
11.2 Electrical Transient Performance
11.3 Electromechanical Transient Performance
11.4 Permanent-Magnet Synchronous Motors
11.4.1 Machines with Surface-Mounted Magnets
11.4.2 Machines with Inset Magnets
11.4.3 Machines with Circumferential Magnets
11.4.4 Hysteresis Motors
11.5 Variable-Frequency Synchronous Motor Drives
11.5.1 Open-Loop Drive Systems
11.5.2 Self-Controlled Drive Systems
11.6 Switched Reluctance Motor Drives
11.7 Stepper Motor Drives
Problems
General References
Appendices
Appendix A SI Unit Equivalents
Appendix B Physical Constants
Appendix C Resistivity and Temperature Coefficient of Resistivity of Some Conductive Materials
Appendix D Wire Table
Answers to Problems
Index