TK767 : Design and simulation of a three phase induction motor drive using DTC-SVM
Thesis > Central Library of Shahrood University > Electrical Engineering > MSc > 2020
Authors:
Mehrdad Mirzaei [Author], Ali Dastfan[Supervisor]
Abstarct: Today, AC motors, especially induction motors, have become one of the most widely used motors in the industry due to their inherent advantages, and with advances in power electronics and digital processors, many modern methods have been proposed to control this motor. Recently, many studies have been done to achieve an effective control of torque and magnetic flux, among which the two methods of field-oriented control and direct torque control are very popular. Reviewing recent studies on direct torque control method, it is clear that one of the most important features of this method, which is the simplicity of design and low computational volume, has been ignored and researchers have improved its performance by adding complexity to the control method. In this thesis, an algorithm for determining the inverter switching states is presented. This algorithm is a combination of space vector modulation controller and hysteresis. However, with the difference that in this algorithm, the complexities of the spatial vector modulation method are reduced and also the problem of variable switching frequency in the hysteresis method is solved and the switching frequency will remain constant. This algorithm is used to determine the inverter switching modes in the direct induction motor torque control method and the control targets in a motor drive system, such as constant switching frequency, torque ripple and stator flux, resulting in less current harmonics and ease of implementation with Using the new space vector modulation algorithm have been obtained. In this thesis, to confirm the accuracy of the presented capabilities, first the open-loop and closed-loop simulation results are performed in Matlab / Simulixnk software and the results of the three control methods DTC-basic, DTC-SVM and the proposed method are compared. Then, to evaluate the performance of the open-loop system, the expressed three methods are implemented using the TMS320F38335 processor in a laboratory and their results are compared with each other.
Keywords:
#induction motor #field oriented control #direct torque control #space vector modulation Keeping place: Central Library of Shahrood University
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