TORQUE CONTROL
Edited by Moulay Tahar Lamchich
Torque Control
Edited by Moulay Tahar Lamchich
Published by InTech
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Copyright © 2011 InTech
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Torque Control, Edited by Moulay Tahar Lamchich
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Part 1
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Part 2
Chapter 6
Chapter 7
Preface IX
Different Techniques for the Control
of Asynchronous Motors and Double Feed
or Double Star Induction Machines 1
Torque Control of CSI Fed Induction Motor Drives 3
Aleksandar Nikolic
Direct Torque Control Based Multi-level Inverter and
Artificial Intelligence Techniques of Induction Motor 29
Lamchich Moulay Tahar and Lachguer Nora
Direct Torque Control using Space Vector
Modulation and Dynamic Performance of the Drive,
via a Fuzzy Logic Controller for Speed Regulation 51
Adamidis Georgios, and Zisis Koutsogiannis
Induction Motor Vector and Direct Torque Control
Improvement during the Flux Weakening Phase 83
Kasmieh Tarek
Control of a Double Feed and Double Star

Induction Machine Using Direct Torque Control 113
Leila Benalia
Oriented Approach of Recent Developments
Relating to the Control of the Permanent
Magnet Synchronous Motors 127
Direct Torque Control of
Permanent Magnet Synchronous Motors 129
Selin Ozcira and Nur Bekiroglu
Torque Control of PMSM
and Associated Harmonic Ripples 155
Ali Ahmed Adam, and Kayhan Gulez
Contents
Contents
VI
Special Controller Design and Torque Control
of Switched Reluctance Machine 199
Switched Reluctance Motor 201
Jin-Woo Ahn
Controller Design for Synchronous Reluctance
Motor Drive Systems with Direct Torque Control 253
Tian-Hua Liu
Part 3
Chapter 8
Chapter 9


Pref ac e
Modern electrical drive systems are composed principally of; motors, power electron-
ics components, transformers, analog/digital controllers and sensors or observers. The
improvements and the enormous advances in the fi eld of power electronic (semicon-

ductor components), converters technology and so ware/implementation technology
have enabled advanced and complex control techniques. With these advances and ro-
bust control algorithms improved, considerable research eff ort is devoted for develop-
ing optimal techniques of speed and torque control for induction machines.
Also, torque control has been, for a long time, a remarkable fi eld for industrial and
academic research. Diff erent speed and torque control techniques were developed for
many types of induction machines and for various applications. As it can be confi rmed
from the increasing number of conferences and journals on speed and torque control
of induction motors, it is certain that the optimal and robust torque control are a sig-
nifi cant guidance for technology development especially for applications based speed
variators.
This book is the result of inspirations and contributions from many researchers (a col-
lection of 9 works) which are, in majority, focalised around the Direct Torque Con-
trol and may be comprised of three sections: diff erent techniques for the control of
asynchronous motors and double feed or double star induction machines, oriented
approach of recent developments relating to the control of the Permanent Magnet Syn-
chronous Motors, and special controller design and torque control of switched reluc-
tance machine.
In the fi rst section, composed on chapters 1 to 5, the recent developments of the induc-
tion machines control are widely developed: a er presentation of the machine model
(asynchronous, doubly fed or double star), and control method adopted (specially Field
Oriented Control, Direct Torque Control or their association) some ideas for improved
performance are provided. In this object, the impact study, of diff erent structures of
static power converters (Current Source Inverter, Multi-level inverter), on the dynamic
and system performance is exploited. In addition, the contributions made by the use
of artifi cial intelligence techniques either for the design of the controllers or in the
development of switching tables, in the case of the Direct Torque Control, are amply
explained. Furthermore the study of special phenomena (fl ux weakening phase) or
X
Preface

other types of machines for specifi c applications (Double feed or Double star induction
machines) is presented.
The second section, composed of two chapters, is on behaviour of Permanent Magnet
machine controlled by direct torque control method. Diff erent techniques are used to
improve torque ripple reduction and harmonic noises in PMSM. Also, as an improve-
ment approach, diff erent fi lters types are discussed and a RLC low pass is tested in
order to eliminate the harmonics.
The last section includes two research articles on development of reluctance motors.
The investigations are focused on the controller design and the implementation of
sensorless reluctance drive with direct torque control and also on the torque ripple
which can be minimized through magnetic circuit design or switched reluctance mo-
tors control.
Finally, in my capacity, as the Editor of this book, I would like to thank and appreciate
the chapter authors, who ensured the quality of their best works submi ed. Most of
the results presented in the book have already been presented on many international
conferences and will make this book useful for students and researchers who will con-
tribute to further development of the existing technology.
I hope all will enjoy the book.
February 10, 2011
Pr. M.T. Lamchich
Department of Physic
Laboratory of Electronic and Instrumentation
Faculty of Sciences Semlalia - University Cadi Ayyad
Marrakech - Morocco


Part 1
Different Techniques for the Control of
Asynchronous Motors and Double Feed or
Double Star Induction Machines