High Performance AC Drives (eBook)

Tilte 1
Preface 5
Contents 7
Introduction 11
Introduction to Electric Drives 11
Electric Motors 12
Power Electronic Converters 12
Controllers 14
Load 14
Load Dynamics and Stability 15
Multi-quadrant Operation 18
Duty Cycle and Motor Rating 19
Problems 20
References 21
Modeling of Induction and Synchronous Machines 22
Induction Machine Theory 22
Equivalent Circuit of Induction Motor 23
Dynamic Model of a Two-Phase Induction Machine 25
Selection of Reference Frame 31
Models in Other Reference Frames 34
Space Phasor Model 36
Speed Control of Induction Motor 43
State Space Model 43
Modeling of Synchronous Machine 45
Dynamic Modeling of Synchronous Machine 50
Space Phasor Model 52
References 53
Vector Control of Induction Motor Drives 55
Speed Control of Induction Motor 55
Introduction to Vector Control 58
Space Vectors 58
Transformation of Space Vector from One Reference Frame to Other 60
Principle of Vector Control 63
Direct Vector Control 66
Direct Vector Control with VSI Using Space Vector Modulation (SVM) 71
Indirect Vector Control or Feed Forward Control 76
Case Study 1 82
References 83
Direct Torque Control and Sensor-LessControl of Induction Machine 84
Introduction 84
Direct Torque Control Basics 85
DTC Control Strategy 88
Switching Table Based DTC Scheme 92
Sensorless Control of Induction Motor 94
References 102
Control of Permanent Magnet Machine (PM) 104
Introduction 104
Design Considerations 107
Modeling of PMSM 108
Modeling of Brushless DC Motor 109
Drive Operation with Inverter 114
Speed Control Using PWM Inverter 117
Vector Control of PMSM 117
Operating Modes 119
Direct Torque Control of PM Motor 123
Sensorless Control of PM Motor 126
Sensorless Control of BLDC Motor 132
References 135
Switched Reluctance Motor Drives (SRM) 136
Introduction 136
Construction 136
Basic Principle of Operation 140
Design of SR Machine 141
Converters for SR Machine 145
Buck-Boost Converter 152
Analytical Model of SR Machine 153
Control of SR Motor Drive 155
General Purpose SRM Drive with Speed/Position Sensor 157
Direct Torque Control of SRM Drive 159
Sensorless Control of SRM Drives 163
References 166
Control of Multiphase AC Motor Drives 168
Introduction 168
Modeling of a Five Phase Induction Motor 168
Machine Model in Arbitrary Reference Frame 171
Vector Control of Five-Phase Induction Motor 173
Five-Phase Inverters 174
Five-Phase Permanent-Magnet Motor Drives 178
References 179
Fuzzy Logic and Neural Network Applications in AC Drives 181
Introduction 181
Basic Principle 182
Fuzzy System 184
Fuzzy Rule Base 184
Fuzzy Inference Engine 184
Defuzzification Methods 185
Speed Control of Induction Motor Using Fuzzy Controller 186
Neural Network Based Control 189
References 194