Schaum's Outline of Electric Machines &

More than 50,000 copies of this powerful study guide sold in the first edition! Covering a broad range of topics, from simple DC magnetic circuits to electronic control of DC and AC motors, all the concepts and their applications are clearly explained and illustrated. Includes hundreds of problems with detailed solutions to help students learn quickly and reaise test scores without investing unnecessary time. Ideal for undergraduate students of electrical engineering, for solo study, and as a refresher.

Chapter 1 MAGNETIC CIRCUITS

1

(23)

1.1 Introduction and Basic Concepts

1

(1)

1.2 Permeability and Saturation

2

(1)

1.3 Laws Governing Magnetic Circuits

3

(1)

1.4 AC Operation and Losses

4

(1)

1.5 Stacking Factor

5

(1)

1.6 Fringing

5

(1)

1.7 Energy Stored in a Magnetic Field

5

(1)

1.8 Inductance Calculations

6

(1)

1.9 Magnetic Circuits with Permanent Magnets

7

(17)

Chapter 2 POWER TRANSFORMERS

24

(23)

2.1 Transformer Operation and Faraday's Law

24

(1)

2.2 EMF Equation of a Transformer

25

(1)

2.3 Transformer Losses

25

(1)

2.4 Equivalent Circuits of Nonideal Transformers

25

(2)

2.5 Tests on Transformers

27

(2)

2.6 Transformer Connections

29

(1)

2.7 Autotransformers

30

(1)

2.8 Instrument Transformers

31

(16)

Chapter 3 ELECTROMECHANICAL SYSTEMS

47

(24)

3.1 Electromechanical Energy Conversion

47

(2)

3.2 Force and Torque Equations

49

(1)

3.3 Electromechanical Dynamics

50

(2)

3.4 Electromechanical Analogies

52

(19)

Chapter 4 DC MACHINES

71

(27)

4.1 Operating Principles

71

(1)

4.2 Commutator Action

72

(1)

4.3 Armature Windings and Physical Features

73

(1)

4.4 EMF Equation

74

(1)

4.5 Torque Equation

74

(1)

4.6 Speed Equation

75

(1)

4.7 Machine Classification

75

(1)

4.8 Airgap Fields and Armature Reaction

76

(2)

4.9 Reactance Voltage and Commutation

78

(1)

4.10 Effect of Saturation on Voltage Buildup in a Shunt Generator

79

(1)

4.11 Losses and Efficiency

80

(1)

4.12 Motor and Generator Characteristics

81

(1)

4.13 DC Motor Dynamics

81

(17)

Chapter 5 POLYPHASE INDUCTION MOTORS

98

(25)

5.1 General Remarks

98

(1)

5.2 MMFs of Armature Windings

98

(2)

5.3 Production of Rotating Magnetic Fields

100

(1)

5.4 Slip: Machine Equivalent Circuits

101

(2)

5.5 Calculations from Equivalent Circuits

103

(1)

5.6 Energy-Efficient Induction Motors

104

(1)

5.7 Approximate Equivalent Circuit Parameters from Test Data

105

(18)

Chapter 6 SYNCHRONOUS MACHINES

123

(30)

6.1 Types and Constructional Features

123

(1)

6.2 Generator and Motor Operation; The EMF Equation

123

(2)

6.3 Generator No-Load, Short-Circuit, and Voltage-Regulation Characteristics

125

(1)

6.4 Power-Angle Characteristic of a Round-Rotor Machine

126

(1)

6.5 Performance of the Round-Rotor Motor

127

(1)

6.6 Salient-Pole Synchronous Machines

128

(2)

6.7 Transients in Synchronous Machines

130

(23)

Chapter 7 SINGLE-PHASE MOTORS AND PERMANENT MAGNET MACHINES

153

(21)

7.1 Small AC Motors

153

(1)

7.2 Analysis of Single-Phase Induction Motors

153

(1)

7.3 Starting of Single-Phase Induction Motors

153

(3)

7.4 Permanent Magnet Machines

156

(6)

7.5 Hysteresis Motors

162

(12)

Chapter 8 ELECTRONIC CONTROL OF MOTORS

174

(35)

8.1 General Considerations

174

(1)

8.2 Power Solid-State Devices

175

(4)

8.3 RMS and Average Values of Waveforms

179

(1)

8.4 Control of DC Motors

180

(5)

8.5 Control of AC Motors

185

(4)

8.6 SCR Commutation

189

(20)

Appendix A Units Conversion

209

(1)

Appendix B Characteristics of Single-Film-Coated, Rounded, Magnet Wire

210

(1)

Appendix C Characteristics of Magnetic Materials and Permanent Magnets

211

(4)

INDEX

215

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Schaum's Outline of Electric Machines & Electromechanics

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Table of Contents

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