Ahmad High Performance AC Drives

Modelling Analysis and Control
1. Auflage 2010
ISBN: 978-3-642-13150-9
Verlag: Springer
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 290 Seiten

Reihe: Power Systems

Variable speed is one of the important requirements in most of the electric drives. Earlier dc motors were the only drives that were used in industries requiring - eration over a wide range of speed with step less variation, or requiring fine ac- racy of speed control. Such drives are known as high performance drives. AC - tors because of being highly coupled non-linear devices can not provide fast dynamic response with normal controls. However, recently, because of ready availability of power electronic devices, and digital signal processors ac motors are beginning to be used for high performance drives. Field oriented control or vector control has made a fundamental change with regard to dynamic perfo- ance of ac machines. Vector control makes it possible to control induction or s- chronous motor in a manner similar to control scheme used for the separately - cited dc motor. Recent advances in artificial intelligence techniques have also contributed in the improvement in performance of electric drives. This book presents a comprehensive view of high performance ac drives. It may be considered as both a text book for graduate students and as an up-to-date monograph. It may also be used by R & D professionals involved in the impro- ment of performance of drives in the industries. The book will also be beneficial to the researchers pursuing work on sensorless and direct torque control of electric drives as up-to date references in these topics are provided.

Autoren/Hrsg.

Ahmad, Mukhtar

Inhaltsverzeichnis

1;Tilte;1
2;Preface;5
3;Contents;7
4;Introduction;11
4.1;Introduction to Electric Drives;11
4.2;Electric Motors;12
4.3;Power Electronic Converters;12
4.4;Controllers;14
4.5;Load;14
4.6;Load Dynamics and Stability;15
4.7;Multi-quadrant Operation;18
4.8;Duty Cycle and Motor Rating;19
4.9;Problems;20
4.10;References;21
5;Modeling of Induction and Synchronous Machines;22
5.1;Induction Machine Theory;22
5.2;Equivalent Circuit of Induction Motor;23
5.3;Dynamic Model of a Two-Phase Induction Machine;25
5.4;Selection of Reference Frame;31
5.5;Models in Other Reference Frames;34
5.6;Space Phasor Model;36
5.7;Speed Control of Induction Motor;43
5.8;State Space Model;43
5.9;Modeling of Synchronous Machine;45
5.10;Dynamic Modeling of Synchronous Machine;50
5.11;Space Phasor Model;52
5.12;References;53
6;Vector Control of Induction Motor Drives;55
6.1;Speed Control of Induction Motor;55
6.2;Introduction to Vector Control;58
6.3;Space Vectors;58
6.4;Transformation of Space Vector from One Reference Frame to Other;60
6.5;Principle of Vector Control;63
6.6;Direct Vector Control;66
6.7;Direct Vector Control with VSI Using Space Vector Modulation (SVM);71
6.8;Indirect Vector Control or Feed Forward Control;76
6.9;Case Study 1;82
6.10;References;83
7;Direct Torque Control and Sensor-LessControl of Induction Machine;84
7.1;Introduction;84
7.2;Direct Torque Control Basics;85
7.3;DTC Control Strategy;88
7.4;Switching Table Based DTC Scheme;92
7.5;Sensorless Control of Induction Motor;94
7.6;References;102
8;Control of Permanent Magnet Machine (PM);104
8.1;Introduction;104
8.2;Design Considerations;107
8.3;Modeling of PMSM;108
8.4;Modeling of Brushless DC Motor;109
8.5;Drive Operation with Inverter;114
8.6;Speed Control Using PWM Inverter;117
8.7;Vector Control of PMSM;117
8.8;Operating Modes;119
8.9;Direct Torque Control of PM Motor;123
8.10;Sensorless Control of PM Motor;126
8.11;Sensorless Control of BLDC Motor;132
8.12;References;135
9;Switched Reluctance Motor Drives (SRM);136
9.1;Introduction;136
9.2;Construction;136
9.3;Basic Principle of Operation;140
9.4;Design of SR Machine;141
9.5;Converters for SR Machine;145
9.6;Buck-Boost Converter;152
9.7;Analytical Model of SR Machine;153
9.8;Control of SR Motor Drive;155
9.9;General Purpose SRM Drive with Speed/Position Sensor;157
9.10;Direct Torque Control of SRM Drive;159
9.11;Sensorless Control of SRM Drives;163
9.12;References;166
10;Control of Multiphase AC Motor Drives;168
10.1;Introduction;168
10.2;Modeling of a Five Phase Induction Motor;168
10.3;Machine Model in Arbitrary Reference Frame;171
10.4;Vector Control of Five-Phase Induction Motor;173
10.5;Five-Phase Inverters;174
10.6;Five-Phase Permanent-Magnet Motor Drives;178
10.7;References;179
11;Fuzzy Logic and Neural Network Applications in AC Drives;181
11.1;Introduction;181
11.2;Basic Principle;182
11.3;Fuzzy System;184
11.4;Fuzzy Rule Base;184
11.5;Fuzzy Inference Engine;184
11.6;Defuzzification Methods;185
11.7;Speed Control of Induction Motor Using Fuzzy Controller;186
11.8;Neural Network Based Control;189
11.9;References;194