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Solution Manual for Power Electronics: A First Course (1st Edition) by Ned Mohan

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  • ISBN-10:  1118074807 / ISBN-13:  9781118074800
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    • Edition: 1st Edition
    • Format: Downloadable ZIP Fille
    • Resource Type : Solution Manual
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    Table of contents:

    PREFACE xiii
    CHAPTER 1 POWER ELECTRONICS: AN ENABLING TECHNOLOGY 1
    1.1 Introduction to Power Electronics 1
    1.2 Applications and the Role of Power Electronics 2
    1.3 Energy and the Environment: Role of Power Electronics in Providing Sustainable Electric Energy 4
    1.4 Need for High Efficiency and High Power Density 8
    1.5 Structure of Power Electronics Interface 9
    1.6 Voltage-Link-Structure 11
    1.7 Recent and Potential Advancements 16
    References 16
    Problems 17
    CHAPTER 2 DESIGN OF SWITCHING POWER-POLES 21
    2.1 Power Transistors and Power Diodes 21
    2.2 Selection of Power Transistors 22
    2.3 Selection of Power Diodes 24
    2.4 Switching Characteristics and Power Losses in Power-Poles 25
    2.5 Justifying Switches and Diodes as Ideal 30
    2.6 Design Considerations 30
    2.7 The PWM IC 33
    References 33
    Problems 34
    Appendix 2A Diode Reverse-Recovery and Power Losses 35
    CHAPTER 3 SWITCH-MODE DC-DC CONVERTERS: SWITCHING ANALYSIS, TOPOLOGY SELECTION AND DESIGN 38
    3.1 DC-DC Converters 38
    3.2 Switching Power-Pole in DC Steady State 38
    3.3 Simplifying Assumptions 42
    3.4 Common Operating Principles 43
    3.5 Buck Converter Switching Analysis in DC Steady State 43
    3.6 Boost Converter Switching Analysis in DC Steady State 45
    3.7 Buck-Boost Converter Analysis in DC Steady State 50
    3.8 Topology Selection 56
    3.9 Worst-Case Design 57
    3.10 Synchronous-Rectified Buck Converter for Very Low Output Voltages 57
    3.11 Interleaving of Converters 58
    3.12 Regulation of DC-DC Converters by PWM 58
    3.13 Dynamic Average Representation of Converters in CCM 59
    3.14 Bi-Directional Switching Power-Pole 61
    3.15 Discontinuous-Conduction Mode (DCM) 62
    References 68
    Problems 68
    CHAPTER 4 DESIGNING FEEDBACK CONTROLLERS IN SWITCH-MODE DC POWER SUPPLIES 74
    4.1 Introduction and Objectives of Feedback Control 74
    4.2 Review of Linear Control Theory 75
    4.3 Linearization of Various Transfer Function Blocks 77
    4.4 Feedback Controller Design in Voltage-Mode Control 83
    4.5 Peak-Current Mode Control 86
    4.6 Feedback Controller Design in DCM 91
    References 93
    Problems 93
    Appendix 4A Bode Plots of Transfer Functions with Poles and Zeros 94
    Appendix 4B Transfer Functions in Continuous Conduction Mode (CCM) (on accompanying website) 97
    Appendix 4C Derivation of Parameters of the Controller Transfer Functions (on accompanying website: www.wiley.com/college/mohan) 97
    CHAPTER 5 RECTIFICATION OF UTILITY INPUT USING DIODE RECTIFIERS 98
    5.1 Introduction 98
    5.2 Distortion and Power Factor 99
    5.3 Classifying the “Front-End” of Power Electronic Systems 107
    5.4 Diode-Rectifier Bridge “Front-Ends” 107
    5.5 Means to Avoid Transient Inrush Currents at Starting 113
    5.6 Front-Ends with Bi-Directional Power Flow 114
    Reference 114
    Problems 114
    CHAPTER 6 POWER-FACTOR-CORRECTION (PFC) CIRCUITS AND DESIGNING THE FEEDBACK CONTROLLER 116
    6.1 Introduction 116
    6.2 Operating Principle of Single-Phase PFCs 116
    6.3 Control of PFCs 119
    6.4 Designing the Inner Average-Current-Control Loop 120
    6.5 Designing the Outer Voltage-Control Loop 122
    6.6 Example of Single-Phase PFC Systems 124
    6.7 Simulation Results 125
    6.8 Feedforward of the Input Voltage 125
    6.9 Other Control Methods for PFCs 125
    References 127
    Problems 127
    Appendix 6A Proving that ^Is3 ^IL2 ¼ 12 128
    Appendix 6B Proving that ~vd ~iL ðsÞ ¼ 1 2 V^s Vd R=2 1 þ sðR=2ÞC 129
    CHAPTER 7 MAGNETIC CIRCUIT CONCEPTS 130
    7.1 Ampere-Turns and Flux 130
    7.2 Inductance L 131
    7.3 Faraday’s Law: Induced Voltage in a Coil Due to Time-Rate of Change of Flux Linkage 133
    7.4 Leakage and Magnetizing Inductances 134
    7.5 Transformers 136
    Reference 139
    Problems 139
    CHAPTER 8 SWITCH-MODE DC POWER SUPPLIES 141
    8.1 Applications of Switch-Mode DC Power Supplies 141
    8.2 Need for Electrical Isolation 142
    8.3 Classification of Transformer-Isolated DC-DC Converters 142
    8.4 Flyback Converters 142
    8.5 Forward Converters 145
    8.6 Full-Bridge Converters 148
    8.7 Half-Bridge and Push-Pull Converters 152
    8.8 Practical Considerations 152
    Reference 152
    Problems 153
    CHAPTER 9 DESIGN OF HIGH-FREQUENCY INDUCTORS AND TRANSFORMERS 155
    9.1 Introduction 155
    9.2 Basics of Magnetic Design 155
    9.3 Inductor and Transformer Construction 156
    9.4 Area-Product Method 156
    9.5 Design Example of an Inductor 159
    9.6 Design Example of a Transformer for a Forward Converter 161
    9.7 Thermal Considerations 161
    References 161
    Problems 162
    CHAPTER 10 SOFT-SWITCHING IN DC-DC CONVERTERS AND CONVERTERS FOR INDUCTION HEATING AND COMPACT FLUORESCENT LAMPS 163
    10.1 Introduction 163
    10.2 Hard-Switching in Switching Power-Poles 163
    10.3 Soft-Switching in Switching Power-Poles 165
    10.4 Inverters for Induction Heating and Compact Fluorescent Lamps 169
    References 170
    Problems 170
    CHAPTER 11 APPLICATIONS OF SWITCH-MODE POWER ELECTRONICS IN MOTOR DRIVES, UNINTERRUPTIBLE POWER SUPPLIES, AND POWER SYSTEMS 172
    11.1 Introduction 172
    11.2 Electric Motor Drives 172
    11.3 Uninterruptible Power Supplies (UPS) 184
    11.4 Utility Applications of Switch-Mode Power Electronics 185
    References 187
    Problems 187
    CHAPTER 12 SYNTHESIS OF DC AND LOW-FREQUENCY SINUSOIDAL AC VOLTAGES FOR MOTOR DRIVES, UPS AND POWER SYSTEMS APPLICATIONS 189
    12.1 Introduction 189
    12.2 Bi-Directional Switching Power-Pole as the Building-Block 190
    12.3 Converters for DC Motor Drives (2Vd , vo , Vd ) 194
    12.4 Synthesis of Low-Frequency AC 200
    12.5 Single-Phase Inverters 201
    12.6 Three-Phase Inverters 204
    12.7 Multilevel Inverters 212
    12.8 Converters for Bi-Directional Power Flow 213
    12.9 Matrix Converters (Direct Link System) 214
    References 221
    Problems 221
    Appendix 12A Space Vector Pulse-Width-Modulation (SV-PWM) 223
    CHAPTER 13 THYRISTOR CONVERTERS 230
    13.1 Introduction 230
    13.2 Thyristors (SCRs) 230
    13.3 Single-Phase, Phase-Controlled Thyristor Converters 232
    13.4 Three-Phase, Full-Bridge Thyristor Converters 237
    13.5 Current-Link Systems 243
    Reference 244
    Problems 245
    CHAPTER 14 UTILITY APPLICATIONS OF POWER ELECTRONICS 247
    14.1 Introduction 247
    14.2 Power Semiconductor Devices and Their Capabilities 248
    14.3 Categorizing Power Electronic Systems 248
    14.4 Distributed Generation (DG) Applications 250
    14.5 Power Electronic Loads 255
    14.6 Power Quality Solutions 255
    14.7 Transmission and Distribution (T&D) Applications 257
    References 261
    Problems 261

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