Vector control and dynamics of AC drives / D.W. Novotny and T.A. Lipo.

CONTENIDO
Chapter 1. Introduction to AC Drives 1
1.1 Introduction 1
1.2 Review of DC Drives 2
1.3 Comparison of DC and AC Motor Drives 4
1.4 Comparison of Synchronous and Induction Machines 7
1.5 Inverters for Adjustable Speed 9
1.6 The Six Step Voltage Stiff Inverter (VSI) 9
1.7 Six Step Inverter Speed and Slip Frequency Control Techniques 15
1.8 The Pulse Width Modulated Inverter (PWM) 18
1.9 The Current Stiff Inverter (CSI) 25
1.10 High Performance Drives vs. General Purpose Drives 31
Chapter 2. d,q Modelling of Induction and Synchronous Machines 35
2.1 Introduction 35
2.2 Winding Inductances 35
2.3 System Equations in the Stationary a.b.c Reference Frame 43
2.4 Determination of Induction Machine Inductances 45
2.5 Complex vector Representation of Three Phase Variables 48
2.6 Complex variable Model of Three Phase Induction Machine 52
2.7 Turns Ratio Transformation 54
2.8 Transformation to a Rotating Reference Frame 56
2.9 Interpretation of Complex Vectors 61
2.10 Power Flow in the d,q Equivalent Circuit 68
2.11 Example-Stator a,b,c and Rotor d,q Model (Stator Referred) 70
2.12 The Electromagnetic Torque 73
2.13 Analysis of Induction Motor Starting Performance Using d,q,0 Variables 78
2.14 Extension of d,q,0 Theory to Analysis of Salient Pole Synchronous 88
2.15 Extension of d,q,0 Theory to Analysis of Permanent Magnet Motors 102
Chapter 3. d,q Models for Solid State Power Converters 109
3.1 Introduction 109
3.2 d,q Model for Voltage Source Inverter 109
3.3 d,q Model for PWM operation 115
3.4 d,q Model for CSI System 116
3.5 Inverter d,q Models in a Synchronous Reference Frame 120
3.6 Examples of Inverter-Induction Motor Models 123
3.7 Fundamental Component Approximation for Steady State Operation 132
3.8 Duality of VSI and CSI Systems 144
Chapter 4. Complex Vector Analysis of Induction Machines 151
4.1 Introduction 151
4.2 Complex Vector Equivalent Circuit 152
4.3 Turns Ratio and Modified d,q Models 153
4.4 Steady State Equivalent Circuits 156
4.5 Invariance of the Steady State Equivalent Circuit 164
4.6 Modified Equivalent Circuits 165
4.7 Electrical Transients at Constant Speed 170
4.8 The Constant Speed Eigenvalues 177
4.9 Transient Equivalent Circuits (Constant Rotor Flux Linkage) 190
Chapter 5. Principles of Vector Control and Field Orientation 203
5.1 Introduction 203
5.2 DC Machine Torque Control 203
5.3 Requirements for Torque Control 206
5.4 Synchronous Machine Vector Control 208
5.5 Synchronous Machine Steady State d,q Model 213
5.6 Torque Control Implementations-Synchronous Machines 217
5.7 Electrical Measurement of the Rotor Field Angle 222
5.8 Brushless DC Machines 222
5.9 Induction Machine Vector Control-Steady State 226
5.10 Induction Machine Steady State d,q Model 234
5.11 Implementation of Field Orientation in Induction Machines 240
5.12 A Basic Difference Between Synchronous and Induction Machine Field Orientation 249
Chapter 6. Dynamics of Vector Control and Field Orientation 257
6.1 Introduction 257
6.2 Dynamics of Induction Machine Field Orientation 257
6.3 Indirect a Controllers for Induction Machine Field Orientation 264
6.4 Direct Controllers for Induction Machine Field Orientation 275
6.5 Induction Machine Field Orientation Using Air Gap Flux 282
6.6 Dynamics of Synchronous Machine Vector Control and Field Orientation 290
6.7 Field Orientation Using Voltage as the Controlled Variable 304
6.8 Stator Flux Based Field Orientation 309
Chapter 7. Current Regulation in Power Converters 317
7.1 Introduction 317
7.2 Current Regulated Inverters 317
7.3 Hysteresis Regulators 322
7.4 Ramp-Comparison Controllers 331
7.5 Stationary Frame Regulators 335
7.6 Synchronous Frame Regulators 340
7.7 Feedforward Compensation 344
7.8 Augmented Feedforward Compensation 347
7.9 Augmented Feedforward Compensation with Decoupling 348
7.10 Predictive Control 349
7.11 Conclusion 351
Chapter 8. Parameter Sensitivity and Saturation Effects in Indirect Field Orientation 353
8.1 Introduction 353
8.2 Phasor Diagram for Detuned Operation 353
8.3 Transient Response 377
8.4 Optimal Selection of Flux Level 388
Chapter 9. Field Weakening Operation 401
9.1 Introduction 401
9.2 Torque Demand and Availability of High Performance Drives 402
9.3 Induction Machine Control Strategy for Constant Horsepower Operation 405
9.4 Inverter Imposed Voltage and Current Limits 406
9.5 Maximum Torque Capability Curve Using the Conventional Method 409
9.6 Scheme for Achieving Maximum Torque Capability 410
9.7 Control System Implementation 414
Appendix-per Unit Representation 417
Answers to Problems 419
Index 435