Ned Mohan

Electric Machines and Drives

A First Course

• Gebundenes Buch

Produktbeschreibung

Mohan s Electric Machines and Drives is part of a three-book series designed for the power sequence electives on Electrical Engineering. The book focuses on power topics including advances in hybrid-electric cars and alternative energy systems, coupled with severe environmental problems associated with hydrocarbon-based fuels. The text builds off Mohan s successful MNPERE titles and adopts a systems approach.

Produktdetails

• Verlag: Wiley & Sons
• 1. Auflage
• Seitenzahl: 288
• Erscheinungstermin: 3. Januar 2012
• Englisch
• Abmessung: 269mm x 187mm x 18mm
• Gewicht: 564g
• ISBN-13: 9781118074817
• ISBN-10: 1118074815
• Artikelnr.: 33399399

Autorenporträt

Ned Mohan is Oscar A. Schott Professor of Power Electronics in the Department of Electrical Engineering at the University of Minnesota, where he has been teaching for 33 years. He has written five textbooks; one of them is translated into several languages. He has 13 patents and has written over 200 technical articles. He is actively involved in the area of renewable energy and is working on the next generation of wind generators and storage. He received the Distinguished Teaching Award by the Institute of Technology at the University of Minnesota. He is a Morse-Alumni Distinguished Teaching Professor and is a member of the Academy of Distinguished Teachers at the University of Minnesota. He received the Outstanding Educator Award from the Power Engineering Society of the IEEE in 2008. He is a Fellow of the IEEE.

Inhaltsangabe

PREFACE xi CHAPTER 1 INTRODUCTION TO ELECTRIC DRIVE SYSTEMS 1 1.1 History 1
1.2 What Is an Electric-Motor Drive? 2 1.3 Factors Responsible for the
Growth of Electric Drives 3 1.4 Typical Applications of Electric Drives 3
1.5 The Multi-Disciplinary Nature of Drive Systems 8 1.6 Structure of the
Textbook 9 References 10 Problems 11 CHAPTER 2 UNDERSTANDING MECHANICAL
SYSTEM REQUIREMENTS FOR ELECTRIC DRIVES 12 2.1 Introduction 12 2.2 Systems
with Linear Motion 12 2.3 Rotating Systems 14 2.4 Friction 20 2.5 Torsional
Resonances 21 2.6 Electrical Analogy 22 2.7 Coupling Mechanisms 23 2.8
Types of Loads 26 2.9 Four-Quadrant Operation 27 2.10 Steady State and
Dynamic Operations 27 References 28 Problems 28 CHAPTER 3 REVIEW OF BASIC
ELECTRIC CIRCUITS 31 3.1 Introduction 31 3.2 Phasor Representation in
Sinusoidal Steady State 31 3.3 Three-Phase Circuits 38 Reference 43
Problems 43 CHAPTER 4 BASIC UNDERSTANDING OF SWITCH-MODE POWER ELECTRONIC
CONVERTERS IN ELECTRIC DRIVES 46 4.1 Introduction 46 4.2 Overview of Power
Processing Units (PPUs) 46 4.3 Converters for DC Motor Drives ?2Vd , vo ,
Vd? 52 4.4 Synthesis of Low-Frequency AC 58 4.5 Three-Phase Inverters 59
4.6 Power Semiconductor Devices 62 References 66 Problems 66 CHAPTER 5
MAGNETIC CIRCUITS 69 5.1 Introduction 69 5.2 Magnetic Field Produced by
Current-Carrying Conductors 69 5.3 Flux Density B and the Flux f 71 5.4
Magnetic Structures with Air Gaps 74 5.5 Inductances 76 5.6 Faraday's Law:
Induced Voltage in a Coil due to Time-Rate of Change of Flux Linkage 78 5.7
Leakage and Magnetizing Inductances 81 5.8 Transformers 83 5.9 Permanent
Magnets 88 References 90 Problems 90 CHAPTER 6 BASIC PRINCIPLES OF
ELECTROMECHANICAL ENERGY CONVERSION 92 6.1 Introduction 92 6.2 Basic
Structure 92 6.3 Production of Magnetic Field 94 6.4 Basic Principles of
Operation 96 6.5 Application of the Basic Principles 98 6.6 Energy
Conversion 99 6.7 Power Losses and Energy Efficiency 101 6.8 Machine
Ratings 102 References 103 Problems 103 CHAPTER 7 DC-MOTOR DRIVES AND
ELECTRONICALLYCOMMUTATED MOTOR (ECM) DRIVES 108 7.1 Introduction 108 7.2
The Structure of DC Machines 109 7.3 Operating Principles of DC Machines
111 7.4 DC-Machine Equivalent Circuit 117 7.5 Various Operating Modes in
DC-Motor Drives 119 7.6 Flux Weakening in Wound-Field Machines 122 7.7
Power-Processing Units in DC Drives 123 7.8 Electronically-Commutated Motor
(ECM) Drives 123 References 129 Problems 129 CHAPTER 8 DESIGNING FEEDBACK
CONTROLLERS FOR MOTOR DRIVES 132 8.1 Introduction 132 8.2 Control
Objectives 132 8.3 Cascade Control Structure 135 8.4 Steps in Designing the
Feedback Controller 135 8.5 System Representation for Small-Signal Analysis
136 8.6 Controller Design 138 8.7 Example of a Controller Design 139 8.8
The Role of Feed-Forward 145 8.9 Effects of Limits 145 8.10 Anti-Windup
(Non-Windup) Integration 146 References 147 Problems and Simulations 147
CHAPTER 9 INTRODUCTION TO AC MACHINES AND SPACE VECTORS 149 9.1
Introduction 149 9.2 Sinusoidally-Distributed Stator Windings 149 9.3 The
Use of Space Vectors to Represent Sinusoidal Field Distributions in the Air
Gap 156 9.4 Space-Vector Representation of Combined Terminal Currents and
Voltages 159 9.5 Balanced Sinusoidal Steady-State Excitation (Rotor
Open-Circuited) 164 References 172 Problems 172 CHAPTER 10 SINUSOIDAL
PERMANENT MAGNET AC (PMAC) DRIVES, LCI-SYNCHRONOUS MOTOR DRIVES, AND
SYNCHRONOUS GENERATORS 174 10.1 Introduction 174 10.2 The Basic Structure
of Permanent-Magnet AC (PMAC) Machines 175 10.3 Principle of Operation 175
10.4 The Controller and the Power-Processing Unit (PPU) 185 10.5
Load-Commutated-Inverter (LCI) Supplied Synchronous Motor Drives 186 10.6
Synchronous Generators 187 References 191 Problems 191 CHAPTER 11 INDUCTION
MOTORS: BALANCED, SINUSOIDAL STEADY STATE OPERATION 193 11.1 Introduction
193 11.2 The Structure of Three-Phase, Squirrel-Cage Induction Motors 194
11.3 The Principles of Induction Motor Operation 194 11.4 Tests to Obtain
the Parameters of the Per-Phase Equivalent Circuit 215 11.5 Induction Motor
Characteristics at Rated Voltages in Magnitude and Frequency 216 11.6
Induction Motors of Nema Design A, B, C, and D 218 11.7 Line Start 219 11.8
Reduced Voltage Starting ("soft start") of Induction Motors 220 11.9
Energy-Savings in Lightly-Loaded Machines 220 11.10 Doubly-Fed Induction
Generators (DFIG) in Wind Turbines 221 References 228 Problems 229 CHAPTER
12 INDUCTION-MOTOR DRIVES: SPEED CONTROL 231 12.1 Introduction 231 12.2
Conditions for Efficient Speed Control Over a Wide Range 232 12.3 Applied
Voltage Amplitudes to Keep ^ Bms 5 ^ Bms;rated 235 12.4 Starting
Considerations in Drives 239 12.5 Capability to Operate below and above the
Rated Speed 240 12.6 Induction-Generator Drives 242 12.7 Speed Control of
Induction-Motor Drives 243 12.8 Pulse-Width-Modulated Power-Processing Unit
244 12.9 Reduction of ^ Bms at Light Loads 248 References 249 Problems 249
CHAPTER 13 RELUCTANCE DRIVES: STEPPER-MOTOR AND SWITCHED-RELUCTANCE DRIVES
250 13.1 Introduction 250 13.2 The Operating Principle of Reluctance Motors
251 13.3 Stepper-Motor Drives 253 13.4 Switched-Reluctance Motor Drives 259
References 260 Problems 260 CHAPTER 14 ENERGY EFFICIENCY OF ELECTRIC DRIVES
AND INVERTER-MOTOR INTERACTIONS 261 14.1 Introduction 261 14.2 The
Definition of Energy Efficiency in Electric Drives 261 14.3 The Energy
Efficiency of Induction Motors with Sinusoidal Excitation 262 14.4 The
Effects of Switching-Frequency Harmonics on Motor Losses 265 14.5 The
Energy Efficiencies of Power-Processing Units 266 14.6 Energy Efficiencies
of Electric Drives 266 14.7 The Economics of Energy Savings by
Premium-Efficiency Electric Motors and Electric Drives 266 14.8 The
Deleterious Effects of The PWM-Inverter Voltage Waveform on Motor Life 267
14.9 Benefits of Using Variable-Speed Drives 268 References 268 Problem 269