Electric Machines and Drives

Inbunden, Engelska, 2012

AvNed Mohan,Minneapolis) Mohan, Ned (University of Minnesota

2 779 kr

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This book is part of a three-book series. Ned Mohan has been a leader in EES education and research for decades, as author of the best-selling text/reference Power Electronics. This book emphasizes applications of electric machines and drives that are essential for wind turbines and electric and hybrid-electric vehicles. The approach taken is unique in the following respects: A systems approach, where Electric Machines are covered in the context of the overall drives with applications that students can appreciate and get enthusiastic about;A fundamental and physics-based approach that not only teaches the analysis of electric machines and drives, but also prepares students for learning how to control them in a graduate level course;Use of the space-vector-theory that is made easy to understand. They are introduced in this book in such a way that students can appreciate their physical basis;A unique way to describe induction machines that clearly shows how they go from the motoring-mode to the generating-mode, for example in wind and electric vehicle applications, and how they ought to be controlled for the most efficient operation.

Produktinformation

Utgivningsdatum2012-01-31
Mått180 x 257 x 18 mm
Vikt590 g
FormatInbunden
SpråkEngelska
Antal sidor288
FörlagJohn Wiley & Sons Inc
ISBN9781118074817

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Energiteknik inom Naturvetenskap och teknik

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.

PREFACE xi CHAPTER 1 INTRODUCTION TO ELECTRIC DRIVE SYSTEMS 11.1 History 11.2 What Is an Electric-Motor Drive? 21.3 Factors Responsible for the Growth of Electric Drives 31.4 Typical Applications of Electric Drives 31.5 The Multi-Disciplinary Nature of Drive Systems 81.6 Structure of the Textbook 9References 10Problems 11CHAPTER 2 UNDERSTANDING MECHANICAL SYSTEM REQUIREMENTS FOR ELECTRIC DRIVES 122.1 Introduction 122.2 Systems with Linear Motion 122.3 Rotating Systems 142.4 Friction 202.5 Torsional Resonances 212.6 Electrical Analogy 222.7 Coupling Mechanisms 232.8 Types of Loads 262.9 Four-Quadrant Operation 272.10 Steady State and Dynamic Operations 27References 28Problems 28CHAPTER 3 REVIEW OF BASIC ELECTRIC CIRCUITS 313.1 Introduction 313.2 Phasor Representation in Sinusoidal Steady State 313.3 Three-Phase Circuits 38Reference 43Problems 43CHAPTER 4 BASIC UNDERSTANDING OF SWITCH-MODE POWER ELECTRONIC CONVERTERS IN ELECTRIC DRIVES 464.1 Introduction 464.2 Overview of Power Processing Units (PPUs) 464.3 Converters for DC Motor Drives ð2Vd , vo , VdÞ 524.4 Synthesis of Low-Frequency AC 584.5 Three-Phase Inverters 594.6 Power Semiconductor Devices 62References 66Problems 66CHAPTER 5 MAGNETIC CIRCUITS 695.1 Introduction 695.2 Magnetic Field Produced by Current-Carrying Conductors 695.3 Flux Density B and the Flux f 715.4 Magnetic Structures with Air Gaps 745.5 Inductances 765.6 Faraday’s Law: Induced Voltage in a Coil due to Time-Rate of Change of Flux Linkage 785.7 Leakage and Magnetizing Inductances 815.8 Transformers 835.9 Permanent Magnets 88References 90Problems 90CHAPTER 6 BASIC PRINCIPLES OF ELECTROMECHANICAL ENERGY CONVERSION 926.1 Introduction 926.2 Basic Structure 926.3 Production of Magnetic Field 946.4 Basic Principles of Operation 966.5 Application of the Basic Principles 986.6 Energy Conversion 996.7 Power Losses and Energy Efficiency 1016.8 Machine Ratings 102References 103Problems 103CHAPTER 7 DC-MOTOR DRIVES AND ELECTRONICALLYCOMMUTATED MOTOR (ECM) DRIVES 1087.1 Introduction 1087.2 The Structure of DC Machines 1097.3 Operating Principles of DC Machines 1117.4 DC-Machine Equivalent Circuit 1177.5 Various Operating Modes in DC-Motor Drives 1197.6 Flux Weakening in Wound-Field Machines 1227.7 Power-Processing Units in DC Drives 1237.8 Electronically-Commutated Motor (ECM) Drives 123References 129Problems 129CHAPTER 8 DESIGNING FEEDBACK CONTROLLERS FOR MOTOR DRIVES 1328.1 Introduction 1328.2 Control Objectives 1328.3 Cascade Control Structure 1358.4 Steps in Designing the Feedback Controller 1358.5 System Representation for Small-Signal Analysis 1368.6 Controller Design 1388.7 Example of a Controller Design 1398.8 The Role of Feed-Forward 1458.9 Effects of Limits 1458.10 Anti-Windup (Non-Windup) Integration 146References 147Problems and Simulations 147CHAPTER 9 INTRODUCTION TO AC MACHINES AND SPACE VECTORS 1499.1 Introduction 1499.2 Sinusoidally-Distributed Stator Windings 1499.3 The Use of Space Vectors to Represent Sinusoidal Field Distributions in the Air Gap 1569.4 Space-Vector Representation of Combined Terminal Currents and Voltages 1599.5 Balanced Sinusoidal Steady-State Excitation (Rotor Open-Circuited) 164References 172Problems 172CHAPTER 10 SINUSOIDAL PERMANENT MAGNET AC (PMAC) DRIVES, LCI-SYNCHRONOUS MOTOR DRIVES, AND SYNCHRONOUS GENERATORS 17410.1 Introduction 17410.2 The Basic Structure of Permanent-Magnet AC (PMAC) Machines 17510.3 Principle of Operation 17510.4 The Controller and the Power-Processing Unit (PPU) 18510.5 Load-Commutated-Inverter (LCI) Supplied Synchronous Motor Drives 18610.6 Synchronous Generators 187References 191Problems 191CHAPTER 11 INDUCTION MOTORS: BALANCED, SINUSOIDAL STEADY STATE OPERATION 19311.1 Introduction 19311.2 The Structure of Three-Phase, Squirrel-Cage Induction Motors 19411.3 The Principles of Induction Motor Operation 19411.4 Tests to Obtain the Parameters of the Per-Phase Equivalent Circuit 21511.5 Induction Motor Characteristics at Rated Voltages in Magnitude and Frequency 21611.6 Induction Motors of Nema Design A, B, C, and D 21811.7 Line Start 21911.8 Reduced Voltage Starting (“soft start”) of Induction Motors 22011.9 Energy-Savings in Lightly-Loaded Machines 22011.10 Doubly-Fed Induction Generators (DFIG) in Wind Turbines 221References 228Problems 229CHAPTER 12 INDUCTION-MOTOR DRIVES: SPEED CONTROL 23112.1 Introduction 23112.2 Conditions for Efficient Speed Control Over a Wide Range 23212.3 Applied Voltage Amplitudes to Keep ^ Bms 5 ^ Bms;rated 23512.4 Starting Considerations in Drives 23912.5 Capability to Operate below and above the Rated Speed 24012.6 Induction-Generator Drives 24212.7 Speed Control of Induction-Motor Drives 24312.8 Pulse-Width-Modulated Power-Processing Unit 24412.9 Reduction of ^ Bms at Light Loads 248References 249Problems 249CHAPTER 13 RELUCTANCE DRIVES: STEPPER-MOTOR AND SWITCHED-RELUCTANCE DRIVES 25013.1 Introduction 25013.2 The Operating Principle of Reluctance Motors 25113.3 Stepper-Motor Drives 25313.4 Switched-Reluctance Motor Drives 259References 260Problems 260CHAPTER 14 ENERGY EFFICIENCY OF ELECTRIC DRIVES AND INVERTER-MOTOR INTERACTIONS 26114.1 Introduction 26114.2 The Definition of Energy Efficiency in Electric Drives 26114.3 The Energy Efficiency of Induction Motors with Sinusoidal Excitation 26214.4 The Effects of Switching-Frequency Harmonics on Motor Losses 26514.5 The Energy Efficiencies of Power-Processing Units 26614.6 Energy Efficiencies of Electric Drives 26614.7 The Economics of Energy Savings by Premium-Efficiency Electric Motors and Electric Drives 26614.8 The Deleterious Effects of The PWM-Inverter Voltage Waveform on Motor Life 26714.9 Benefits of Using Variable-Speed Drives 268References 268Problem 269

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