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On the submission of my thesis on "Study of Induction Motor Drive with Direct Torque Control sche... more On the submission of my thesis on "Study of Induction Motor Drive with Direct Torque Control scheme and Indirect field oriented control scheme using Space Vector Modulation", I would like to articulate my deep gratitude and sincere thanks to my supervisor Prof. Kanungo Barada Mohanty for his most valuable guidance and thoughtful suggestions during the course of my work throughout the year. His help and advice has been a constant source of inspiration. I am sincerely thankful to Prof. A.K.Panda, Head of the Department, Electrical Engg. and all the faculty members for providing a solid background for my studies and research thereafter. I am thankful to the laboratory staff of the department for their timely help. An assemblage of this nature could never have been attempted without reference to and inspiration from the works of others whose details are mentioned in reference section. I acknowledge my indebtedness to all of them. I am thankful to all my classmates and the department research scholars for their cooperation and unfailing help during the project work. I am grateful to all my friends who made my stay in Rourkela, an unforgettable and rewarding experience. Finally, I feel great reverence for all my family members and the Almighty, for their blessings and for being a constant source of encouragement. Nirupama Patra DEDICATED TO MY BELOVED PARENTS I ABSTRACT Induction motors are the starting point to design an electrical drive system which is widely used in many industrial applications. In modern control theory, different mathematical models describe induction motor according to the employed control methods. Vector control strategy can be applied to this electrical motor type in symmetrical three phase version or in unsymmetrical two phase version. The operation of the induction motor can be analyzed similar to a DC motor through this control method. With the Joint progress of the power electronics and numerical electronics it is possible today to deal with the axis control with variable speed in low power applications. With these technological projections, various command approaches have been developed by the scientific community to master in real time, the flux and the torque of the electrical machines, the direct torque control (DTC) scheme being one of the most recent steps in this direction. This scheme provides excellent properties of regulation without rotational speed feedback. In this control scheme the electromagnetic torque and stator flux magnitude are estimated with only stator voltages and currents and this estimation does not depend on motor parameters except for the stator resistance.
On the submission of my thesis on "Study of Induction Motor Drive with Direct Torque Control sche... more On the submission of my thesis on "Study of Induction Motor Drive with Direct Torque Control scheme and Indirect field oriented control scheme using Space Vector Modulation", I would like to articulate my deep gratitude and sincere thanks to my supervisor Prof. Kanungo Barada Mohanty for his most valuable guidance and thoughtful suggestions during the course of my work throughout the year. His help and advice has been a constant source of inspiration. I am sincerely thankful to Prof. A.K.Panda, Head of the Department, Electrical Engg. and all the faculty members for providing a solid background for my studies and research thereafter. I am thankful to the laboratory staff of the department for their timely help. An assemblage of this nature could never have been attempted without reference to and inspiration from the works of others whose details are mentioned in reference section. I acknowledge my indebtedness to all of them. I am thankful to all my classmates and the department research scholars for their cooperation and unfailing help during the project work. I am grateful to all my friends who made my stay in Rourkela, an unforgettable and rewarding experience. Finally, I feel great reverence for all my family members and the Almighty, for their blessings and for being a constant source of encouragement. Nirupama Patra DEDICATED TO MY BELOVED PARENTS I ABSTRACT Induction motors are the starting point to design an electrical drive system which is widely used in many industrial applications. In modern control theory, different mathematical models describe induction motor according to the employed control methods. Vector control strategy can be applied to this electrical motor type in symmetrical three phase version or in unsymmetrical two phase version. The operation of the induction motor can be analyzed similar to a DC motor through this control method. With the Joint progress of the power electronics and numerical electronics it is possible today to deal with the axis control with variable speed in low power applications. With these technological projections, various command approaches have been developed by the scientific community to master in real time, the flux and the torque of the electrical machines, the direct torque control (DTC) scheme being one of the most recent steps in this direction. This scheme provides excellent properties of regulation without rotational speed feedback. In this control scheme the electromagnetic torque and stator flux magnitude are estimated with only stator voltages and currents and this estimation does not depend on motor parameters except for the stator resistance.