Performance Characteristics of Induction Motor with Field Oriented Control Compared to Direct Torque Control

2016 ◽  
Vol 7 (4) ◽  
pp. 1125 ◽  
Author(s):  
Hamdy Mohamed Soliman
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Harmonic Distortion ◽  
Torque Control ◽  
Performance Characteristics ◽  
Field Oriented Control ◽  
Advantages And Disadvantages ◽  
Ac Motor ◽  
Drive Systems ◽  
Methods Of Control

With development of power electronics and control Theories, the AC motor control becomes easier. So the AC motors are used instead of the DC motor in the drive applications. With this development, a several methods of control are invented. The field oriented control and direct torque control are from the best methods to control the drive systems. This paper is compared between the field oriented control and direct torque control to show the advantages and disadvantages of these methods of controls. This study discussed the effects of these methods of control on the total harmonic distortion of the current and torque ripples. This occurs through study the performance characteristics of the AC motor. The motor used in this study is an induction motor. This study is simulated through the MATLAB program.

Constant Switching Frequency and Torque Ripple Minimization of DTC of Induction Motor Drives with Three-level NPC Inverter

2017 ◽  
Vol 8 (3) ◽  
pp. 1035
Author(s):  
Huzainirah Ismail ◽  
Fazlli Patkar ◽  
Auzani Jidin ◽  
Aiman Zakwan Jidin ◽  
Noor Azida Noor Azlan ◽  
...  
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Motor Drives ◽  
Torque Control ◽  
Switching Frequency ◽  
Ac Motor ◽  
Hysteresis Controller ◽  
Selection Of

<p>Direct Torque Control (DTC) is widely applied for ac motor drives as it offers high performance torque control with a simple control strategy. However, conventional DTC poses some disadvantages especially in term of variable switching frequency and large torque ripple due to the utilization of torque hysteresis controller. Other than that, performance of conventional DTC fed by two-level inverter is also restricted by the limited numbers of voltage vectors which lead to inappropriate selection of voltage vectors for different speed operations. This research aims to propose a Constant Switching Frequency (CSF) torque controller for DTC of induction motor (IM) fed by three-level Neutral-Point Clamped (NPC) inverter. The proposed torque controller utilizes PI controller which apply different gain for different speed operation. Besides, the utilization of NPC inverter provides greater number of voltage vectors which allow appropriate selection of voltage vectors for different operating condition. Using the proposed method, the improvement of DTC drives in term of producing a constant switching operation and minimizing torque ripple are achieved and validated via experimental results.</p>

scholarly journals Direct torque control of doubly fed induction motor using three-level NPC inverter

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Najib El Ouanjli ◽  
Aziz Derouich ◽  
Abdelaziz El Ghzizal ◽  
Mohammed Taoussi ◽  
Youness El Mourabit ◽  
...  
Keyword(s):  
Induction Motor ◽  
Control Method ◽  
System Modeling ◽  
Direct Torque Control ◽  
Harmonic Distortion ◽  
Torque Control ◽  
Voltage Source ◽  
Modeling And Control ◽  
Voltage Source Inverters ◽  
Doubly Fed

Abstract This article presents the direct torque control (DTC) strategy for the doubly fed induction motor (DFIM) connected to two three-level voltage source inverters (3LVSIs) with neutral point clamped (NPC) structure. This control method allows to reduce the torque and flux ripples as well as to optimize the total harmonic distortion (THD) of motor currents. The use of 3LVSI increases the number of generated voltage, which allows improving the quality of its waveform and thus improves the DTC strategy. The system modeling and control are implemented in Matlab/Simulink environment. The analysis of simulation results shows the better performances of this control, especially in terms of torque and flux behavior, compared to conventional DTC.

scholarly journals Direct Torque Control for Induction Motor Drive with Reduced Torque and Flux Ripples

2020 ◽  
Vol 8 (6S) ◽  
pp. 101-106
Keyword(s):  
Induction Motor ◽  
Control Method ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Control Algorithms ◽  
Induction Motor Drive ◽  
Ac Motor ◽  
Three Phase ◽  
Hysteresis Controller

The most universally used electric motor is an induction motor fed with three phase supply and eighty percent of mechanical power utilized by industries is given by three phase asynchronous ac motor. Direct torque control method is one such technique for controlling flux and torque of an asynchronous motor fed with PWM VSI. Without any complex control algorithms, it provides easy commands for the control of induction motor flux as well as torque. We are demonstrating the principle of DTC of an asynchromous motor using three level hysteresis controller in this paper. Philosophy of DTC with aforementioned control method has been simulated using MATLAB/Simulink.

scholarly journals High-performance adaptive intelligent Direct Torque Control schemes for induction motor drives

2005 ◽  
Vol 2 (1) ◽  
pp. 93-116 ◽  
Author(s):  
M. Vasudevan ◽  
R. Arumugam ◽  
S. Paramasivam
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Induction Motor ◽  
High Performance ◽  
Fuzzy Controller ◽  
Linear Time ◽  
Direct Torque Control ◽  
Torque Control ◽  
Advantages And Disadvantages ◽  
State Selection

This paper presents a detailed comparison between viable adaptive intelligent torque control strategies of induction motor, emphasizing advantages and disadvantages. The scope of this paper is to choose an adaptive intelligent controller for induction motor drive proposed for high performance applications. Induction motors are characterized by complex, highly non-linear, time varying dynamics, inaccessibility of some states and output for measurements and hence can be considered as a challenging engineering problem. The advent of torque and flux control techniques have partially solved induction motor control problems, because they are sensitive to drive parameter variations and performance may deteriorate if conventional controllers are used. Intelligent controllers are considered as potential candidates for such an application. In this paper, the performance of the various sensor less intelligent Direct Torque Control (DTC) techniques of Induction motor such as neural network, fuzzy and genetic algorithm based torque controllers are evaluated. Adaptive intelligent techniques are applied to achieve high performance decoupled flux and torque control. This paper contributes: i) Development of Neural network algorithm for state selection in DTC; ii) Development of new algorithm for state selection using Genetic algorithm principle; and iii) Development of Fuzzy based DTC. Simulations have been performed using the trained state selector neural network instead of conventional DTC and Fuzzy controller instead of conventional DTC controller. The results show agreement with those of the conventional DTC.

Employment of torque-hysteresis controller for DTC based induction motor drive

2021 ◽  
Vol 2062 (1) ◽  
pp. 012020
Author(s):  
Payai S. Borse ◽  
Mohan P. Thakre ◽  
Rakesh Shriwastava
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Ac Drive ◽  
Hysteresis Controller ◽  
Dc Drive ◽  
Drive Systems ◽  
Simple Assembly

Abstract To acquire high enactment, Direct Torque Control (DTC) is a technique used in AC drive systems. In this paper, based on the hysteresis controller, a very simple improved DTC scheme is proposed for induction motor drive. Owing to its simple assembly & effective enactment, DTC is used for AC as well as DC drive as compared to other controlling schemes. the paper approaches mitigation of the ripples in torque by varying the predictable 3-level torque-hysteresis controller used in DTC. The expansion of distinctive switching approach has been generated for chosen voltage-vector. Based on ripple content simulation results carried out in MATLAB/SIMULINK for torque-hysteresis controller to minimize the ripples.

Direct-Torque-Control Fault-Tolerant Strategies for Three Induction Motor Drive Systems Operating Under Single-Phase Open-Circuit Fault

2020 ◽  
Author(s):  
Pedro H. M. Martins ◽  
Victor F. M. B. Melo ◽  
Gilielson F. da Paz ◽  
Isaac S. de Freitas
Keyword(s):  
Induction Motor ◽  
Single Phase ◽  
Fault Tolerant ◽  
Direct Torque Control ◽  
Open Circuit ◽  
Torque Control ◽  
Necessary Condition ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Drive Systems

This paper discusses Direct-torque-control(DTC)-based fault-tolerance strategiesapplied to three fault-tolerant induction motor drive systems when they operate under single-phase open-circuit fault. Despite the fact that these drive systems have already been discussed in the literature, the reported papers always make use of Field-oriented-control(FOC)-based fault compensation strategies. In this way, performed simulations show that DTC-based strategies are feasible and are able to provide circular flux trajectory, which is the necessary condition for the motor operate properly.

scholarly journals Simulation of Traction Electric Drive with Vector Systems of Direct Torque Control

2015 ◽  
Vol 2 ◽  
pp. 106
Author(s):  
Ilya Fedotov ◽  
Vyacheslav Tikhonov
Keyword(s):  
Control Systems ◽  
Electric Drive ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Harmonic Distortion ◽  
Torque Control ◽  
Electric Drives ◽  
Advantages And Disadvantages ◽  
Traction Electric Drive ◽  
Vector Systems

The article deals with investigation of electromechanical and energetic characteristics of traction electric drive with vector systems of direct torque control. As a controlled object the traction asynchronous motor ДТА-1У1, which is used to drive the trolley-bus is considered. At the present time the usage of traction asynchronous electric drives for town transport is relevant. Due to development of power electronic devices and microprocessor-based control systems it became possible to replace DC electric drives with electric drives with asynchronous motors. The article contains brief description of two different types of control systems: field-oriented control (FOC) and direct torque control (DTC). Principles of work for both systems are considered and the main advantages and disadvantages associated with the use of these systems are pointed out. The models of both systems for traction asynchronous electric drive, built in modeling environment MATLAB/Simulink, are given in this article for further comparative analysis. As the main quality factor of control total harmonic distortion (THD) is used.

scholarly journals Investigating the Performances of Direct Torque and Flux Control for Dual Stator Induction Motor with Direct and Indirect Matrix Converter

2019 ◽  
Vol 64 (1) ◽  
pp. 97-105
Author(s):  
Yahia Moati ◽  
Katia Kouzi
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Direct Torque Control ◽  
Harmonic Distortion ◽  
Matrix Converter ◽  
Operating Conditions ◽  
Torque Control ◽  
Total Harmonic Distortion ◽  
Input Current ◽  
Matlab Simulink

This work investigates the performances of Direct Torque Control (DTC) of Dual Stator Induction Motor (DSIM) powered by two types of Matrix Converter (MC), namely the direct and indirect MC. To this end, the design of DTC with conventional Direct Matrix Converter (DMC) is firstly presented. Then, in order to illustrate the main feature of Indirect Matrix Converter (IMC) in terms of the output voltages and input currents waveforms, the full steps of IMC are well explained. To discuss the performance of each scheme, both techniques are simulated in the Matlab / Simulink environment for a 4.5 kW DSIM at different operating conditions. The obtained results show that the IMC provides high performance in torque and flux at different conditions and while minimization the Total Harmonic Distortion (THD) in the input current compared by the conventional DMC.

scholarly journals A New Strategy-Based PID Controller Optimized by Genetic Algorithm for DTC of the Doubly Fed Induction Motor

Systems ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 37
Author(s):  
Said Mahfoud ◽  
Aziz Derouich ◽  
Najib EL Ouanjli ◽  
Mohammed EL Mahfoud ◽  
Mohammed Taoussi
Keyword(s):  
Genetic Algorithm ◽  
Nonlinear Systems ◽  
Induction Motor ◽  
Pid Controller ◽  
Hybrid Approach ◽  
Direct Torque Control ◽  
Harmonic Distortion ◽  
Torque Control ◽  
Doubly Fed ◽  
Rejection Time

Proportional Integral Derivative (PID) is the most popular controller used in automatic systems, because of its robustness, ability to adapt the behaviors of the system, making them converge toward its optimum. These advantages are valid only in the case of the linear systems, as they present poor robustness in nonlinear systems. For that reason, many solutions are adopted to improve the PID robustness of the nonlinear systems. The optimization algorithm presents an efficient solution to generate the optimums PID gains adapting to the system’s nonlinearity. The regulation speed in the Direct Torque Control (DTC) is carried out by the PID controller, which caused many inconveniences in terms of speed (overshoot and rejection time), fluxes, and torque ripples. For that, this work describes a new approach for DTC of the Doubly Fed Induction Motor (DFIM) powered by two voltage inverters, using a PID controller for the regulation speed, based on a Genetic Algorithm (GA), which has been proposed for adjustment and optimizing the parameters of the PID controller, using a weighted combination of objective functions. To overcome the disadvantages cited at the beginning, the new hybrid approach GA-DTC has the efficiency to adapt to the system’s nonlinearity. This proposed strategy has been validated and implemented on Matlab/Simulink, which is attributed to many improvements in DFIM performances, such as limiting speed overshoot, reducing response time and the rate of Total Harmonic Distortion (THD) of the stator and rotor currents, and minimizing the rejection time of speed and amplitude of the torque and flux ripples.

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