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.

Fuzzy based fault detection for direct torque control of three phase induction motor drive

2019 ◽  
Author(s):  
R. Senthil Kumar ◽  
S. Jayanandhini ◽  
J. Jenisha ◽  
M. Jayalakshmi ◽  
S. Madhumitha
Keyword(s):  
Fault Detection ◽  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Three Phase

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>

Hybrid Anti-Windup Fuzzy PI Controller Based Direct Torque Control of Three Phase Induction Motor

2014 ◽  
Vol 573 ◽  
pp. 155-160
Author(s):  
A. Pandian ◽  
R. Dhanasekaran
Keyword(s):  
Fuzzy Logic ◽  
Induction Motor ◽  
Fuzzy Logic Controller ◽  
Control Method ◽  
Fuzzy Controller ◽  
Direct Torque Control ◽  
Operating Conditions ◽  
Torque Control ◽  
Constant Speed ◽  
Three Phase

This paper presents improved Fuzzy Logic Controller (FLC) of the Direct Torque Control (DTC) of Three-Phase Induction Motor (IM) for high performance and torque control industrial drive applications. The performance of the IM using PI Controllers and general fuzzy controllers are meager level under load disturbances and transient conditions. The FLC is extended to have a less computational burden which makes it suitable for real time implementation particularly at constant speed and torque disturbance operating conditions. Hybrid control has advantage of integrating a superiority of two or more control techniques for better control performances. A fuzzy controller offers better speed responses for startup and large speed errors. If the nature of the load torque is varied, the steady state speed error of DTC based IM drive with fuzzy logic controller becomes significant. To improve the performance of the system, a new control method, Hybrid fuzzy PI control is proposed. The effectiveness of proposed method is verified by simulation based on MATLAB. The proposed Hybrid fuzzy controller has adaptive control over load toque variation and can maintain constant speed.

scholarly journals Improvement of direct torque control applied to doubly fed induction motor under variable speed

2020 ◽  
Vol 11 (1) ◽  
pp. 97 ◽  
Author(s):  
Hala Alami Aroussi ◽  
Elmostafa Ziani ◽  
Manale Bouderbala ◽  
Badre Bossoufi
Keyword(s):  
Induction Motor ◽  
Control Method ◽  
Direct Torque Control ◽  
Estimation Method ◽  
Torque Control ◽  
Variable Speed ◽  
Multilevel Inverters ◽  
Hysteresis Controller ◽  
Doubly Fed ◽  
Transient And Steady State

<span>This work is dedicated to the study of an improved direct torque control of the doubly fed induction motor (DFIM). The control method adopts direct torque control 'DTC' because of its various advantages like the ease of implementation which allows a good performance at transient and steady state without PI regulators and rotating coordinate transformations. To do this, the modeling of the motor is performed. Subsequently, an explanation of the said command is spread out as well as the principle of adjusting the flux and the electromagnetic torque according to the desired speed. Then, the estimation method of these two control variables will be presented as well as the adopted switching table of the hysteresis controller model used based on the model of the multilevel inverters. Finally, the robustness of the developed system will be analyzed with validation in Matlab/Simulink environment to illustrate the performance of this control.</span>

Analysis of 3 Phase Induction Motor Speed Control with Direct Torque Control (DTC) Method Based on PID Control

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Mokh. Suseno Aji Sari ◽  
Hadi Suyono ◽  
Abraham Lomi
Keyword(s):  
Induction Motor ◽  
Pid Control ◽  
Control Method ◽  
Direct Torque Control ◽  
Torque Control ◽  
Regulation System ◽  
Motor Speed ◽  
Speed Regulation ◽  
Stable Conditions ◽  
Three Phase

This research was conducted to regulate the three phase induction motor speed regulation system. Changes in load on the motor affect the motor speed response so it does not match the set point speed. This study uses the Direct Torque Control (DTC) method in regulating the speed of an induction motor. The DTC method is a vector control method that is directly assigned to the inverter. DTC method in controlling speed based on Proportional Integral Differential (PID) control. Determination of PID tunning using two methods, namely, ziegler-nichols and cohen-coon method. The ziegler-nichols method have overshoot speeds starting at 0.8% of the setpoint, whereas using the cohen coon method there is no overshoot and the speed at stable conditions matches the setpoint.

Implementation of Advanced Control Schemes Using dSPACE Material for Teaching Induction Motor Drives

2010 ◽  
Vol 47 (2) ◽  
pp. 151-167 ◽  
Author(s):  
C. Versèle ◽  
O. Deblecker ◽  
G. Bury ◽  
J. Lobry
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Motor Drives ◽  
Torque Control ◽  
Control Algorithms ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Induction Motor Drives ◽  
Control Schemes ◽  
Advanced Control

This paper describes a project in which students must implement two advanced control schemes for a voltage-fed inverter induction motor drive, namely vector control and direct torque control, using a dSPACE platform and a Matlab/Simulink environment. With this platform, students can focus on these two control schemes without spending too much time on details concerning the implementation of the control algorithms on the board.

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