Thomas A. Lipo

Introduction to AC Machine Design (eBook, PDF)

• Format: PDF

Produktbeschreibung

The only book on the market that emphasizes machine design beyond the basic principles of AC and DC machine behavior AC electrical machine design is a key skill set for developing competitive electric motors and generators for applications in industry, aerospace, and defense. This book presents a thorough treatment of AC machine design, starting from basic electromagnetic principles and continuing through the various design aspects of an induction machine. Introduction to AC Machine Design includes one chapter each on the design of permanent magnet machines, synchronous machines, and thermal design. It also offers a basic treatment of the use of finite elements to compute the magnetic field within a machine without interfering with the initial comprehension of the core subject matter. Based on the author's notes, as well as after years of classroom instruction, Introduction to AC Machine Design: * Brings to light more advanced principles of machine design--not just the basic principles of AC and DC machine behavior * Introduces electrical machine design to neophytes while also being a resource for experienced designers * Fully examines AC machine design, beginning with basic electromagnetic principles * Covers the many facets of the induction machine design Introduction to AC Machine Design is an important text for graduate school students studying the design of electrical machinery, and it will be of great interest to manufacturers of electrical machinery.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 544
• Erscheinungstermin: 6. Oktober 2017
• Englisch
• ISBN-13: 9781119352198
• Artikelnr.: 52558729

Autorenporträt

THOMAS A. LIPO, PhD is an Emeritus Professor at the University of Wisconsin-Madison and also a Research Professor at Florida State University. He has published over 700 technical papers as well as 52 patents, 5 books, and 8 book chapters. Dr. Lipo is a Life Fellow of IEEE, and recipient of the IEEE Medal in Power Engineering. He previously co-published Pulse Width Modulation for Power Converters: Principles and Practice with Wiley-IEEE Press.

Inhaltsangabe

PREFACE AND ACKNOWLEDGMENTS xiii

LIST OF PRINCIPAL SYMBOLS xv

ABOUT THE AUTHOR xxiii

CHAPTER 1 MAGNETIC CIRCUITS 1

1.1 Biot-Savart Law 1

1.2 The Magnetic Field B 2

1.3 Example--Computation of Flux Density B 3

1.4 The Magnetic Vector Potential A 5

1.5 Example--Calculation of Magnetic Field from the Magnetic Vector Potential 6

1.6 Concept of Magnetic Flux 7

1.7 The Electric Field E 9

1.8 Ampere's Law 10

1.9 Magnetic Field Intensity H 12

1.10 Boundary Conditions for B and H 15

1.11 Faraday's Law 17

1.12 Induced Electric Field Due to Motion 18

1.13 Permeance, Reluctance, and the Magnetic Circuit 19

1.14 Example--Square Toroid 23

1.15 Multiple Circuit Paths 23

1.16 General Expression for Reluctance 24

1.17 Inductance 27

1.18 Example--Internal Inductance of a Wire Segment 28

1.19 Magnetic Field Energy 29

1.20 The Problem of Units 31

1.21 Magnetic Paths Wholly in Iron 33

1.22 Magnetic Materials 35

1.23 Example--Transformer Structure 37

1.24 Magnetic Circuits with Air Gaps 40

1.25 Example--Magnetic Structure with Saturation 42

1.26 Example--Calculation for Series-Parallel Iron Paths 43

1.27 Multiple Winding Magnetic Circuits 44

1.28 Magnetic Circuits Applied to Electrical Machines 46

1.29 Effect of Excitation Coil Placement 48

CHAPTER 2 THE MMF AND FIELD DISTRIBUTION OF AN AC WINDING 51

2.1 MMF and Field Distribution of a Full-Pitch Winding for a Two Pole Machine 51

2.2 Fractional Pitch Winding for a Two-Pole Machine 54

2.3 Distributed Windings 56

2.4 Concentric Windings 62

2.5 Effect of Slot Openings 64

2.6 Fractional Slot Windings 67

2.7 Winding Skew 70

2.8 Pole Pairs and Circuits Greater than One 73

2.9 MMF Distribution for Three-Phase Windings 73

2.10 Concept of an Equivalent Two-Phase Machine 76

CHAPTER 3 MAIN FLUX PATH CALCULATIONS USING MAGNETIC CIRCUITS 79

3.1 The Main Magnetic Circuit of an Induction Machine 79

3.2 The Effective Gap and Carter's Coefficient 80

3.3 The Effective Length 84

3.4 Calculation of Tooth Reluctance 86

3.5 Example 1--Tooth MMF Drop 89

3.6 Calculation of Core Reluctance 94

3.7 Example 2--MMF Drop Over Main Magnetic Circuit 102

3.8 Magnetic Equivalent Circuit 111

3.9 Flux Distribution in Highly Saturated Machines 112

3.10 Calculation of Magnetizing Reactance 116

3.11 Example 3--Calculation of Magnetizing Inductance 120

CHAPTER 4 USE OF MAGNETIC CIRCUITS IN LEAKAGE REACTANCE CALCULATIONS 125

4.1 Components of Leakage Flux in Induction Machines 125

4.2 Specific Permeance 127

4.3 Slot Leakage Permeance Calculations 129

4.4 Slot Leakage Inductance of a Single-Layer Winding 134

4.5 Slot Leakage Permeance of Two-Layer Windings 135

4.6 Slot Leakage Inductances of a Double-Cage Winding 137

4.7 Slot Leakage Inductance of a Double-Layer Winding 139

4.8 End-Winding Leakage Inductance 144

4.9 Stator Harmonic or Belt Leakage 156

4.10 Zigzag Leakage Inductance 159

4.11 Example 4--Calculation of Leakage Inductances 164

4.12 Effective Resistance and Inductance Per Phase of Squirrel-Cage Rotor 171

4.13 Fundamental Component of Rotor Air Gap MMF 175

4.14 Rotor Harmonic Leakage Inductance 177

4.15 Calculation of Mutua