ADVANCES IN MOTOR TORQUE CONTROL Edited by Mukhtar Ahmad www.elsolucionario.org Advances in Motor Torque Control Edited by Mukhtar Ahmad Published by InTech Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2011 InTech All chapters are Open Access articles distributed under the Creative Commons Non Commercial Share Alike Attribution 3.0 license, which permits to copy, distribute, transmit, and adapt the work in any medium, so long as the original work is properly cited After this work has been published by InTech, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work Any republication, referencing or personal use of the work must explicitly identify the original source Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher No responsibility is accepted for the accuracy of information contained in the published articles The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book Publishing Process Manager Masa Vidovic Technical Editor Teodora Smiljanic Cover Designer Jan Hyrat Image Copyright oksana2010, 2011 Used under license from Shutterstock.com First published September, 2011 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Advances in Motor Torque Control, Edited by Mukhtar Ahmad p cm ISBN 978-953-307-686-7 www.elsolucionario.org free online editions of InTech Books and Journals can be found at www.intechopen.com www.elsolucionario.org www.elsolucionario.org Contents Preface VII Part Chapter Part Chapter Part Chapter Part Chapter Part Chapter Part Chapter Torque Control in Motors Used in Dentistry Intelligent Torque Control Motors in Dentistry Mohammad Hassan Zarrabi and Maryam Javidi Human Factor and Reactive Torque Control 11 Experimental Verification of Reaction Torque Control Based on Driver Sensitivity to Active Front Steering 13 Ryo Minaki and Yoichi Hori Effect on Efficiency of Motor with Torque Control 31 Study on the Energy Efficiency of Soft Starting of an Induction Motor with Torque Control 33 José de Oliveira, Ademir Nied, Mário Henrique Farias Santos and Rogério Pinho Dias Sensorless Torque Control 47 Sensorless Torque/Force Control 49 Islam S M Khalil and Asif Sabanovic Direct Torque Control 69 Speed Estimation Using Extended Filter Kalman for the Direct Torque Controlled Permanent Magnet Synchronous Motor (PMSM) M S Merzoug and H Benalla Switched Reluctance Motor Torque Control 71 85 Advanced Torque Control Scheme for the High Speed Switched Reluctance Motor 87 Dong-Hee Lee, So-Yeon Ahn and Jin-Woo Ahn www.elsolucionario.org www.elsolucionario.org www.elsolucionario.org www.elsolucionario.org Preface More than fifty percent of total electrical energy generated is converted into mechanical energy with the help of electric motors If the efficiency of these motors is improved, a large amount of energy can be saved With the advent of power electronics it is now possible to control the torque and speed of electric motors precisely as needed, resulting in saving of energy In this book various methods of control of electric motors are discussed Sensorless control of motors requires the estimation of speed without actually measuring it Similarly now the torque is controlled directly by the direct torque control method described in the book Reluctance motors are also finding applications in many industries like consumer appliances, automobiles and defense Special application of motors in dentistry is also described The effect of human reaction on motor performance is also described Dr Mukhtar Ahmad, senior member IEEE Professor, Department of Electrical Engineering, Aligarh Muslim University, India www.elsolucionario.org www.elsolucionario.org ... electric torque control motors (Fig 4) Fig Torque control motor Theoretically, the torque control hand pieces (motors) take into consideration the torque at failure of rotary instrument Torque. .. Steering Sub motor controller Steering Wheel Sub motor θm Electric Signal Line Main motor controller Torque Sensor Planetary Gear Tf θf θt Main motor Rack & Pinion Fig Differential steering system... 2011 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Advances in Motor Torque Control,