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Journal articles on the topic 'Direct Scalar Torque Control'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Vasu. R, Ramana, George Fernandez S., and Vijayakumar K. "Enhanced space vector modulated scalar control of induction motor." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 2 (February 1, 2021): 707. http://dx.doi.org/10.11591/ijeecs.v21.i2.pp707-713.

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<p>A conventional vector control of the asynchronous machine makes an analogy of an equivalent separately excited DC machine. It offers a decoupled control of torque and flux which is perpendicular to each other hence one vector is not interfered by other parameters. So, torque and speed control is achieved in an isolated manner even though they are closely interlinked. This is implemented by aligning the rotor flux with the direct axis of the synchronously rotating reference frame. PI controllers play a key role to achieve the desired topology of the VFD. Three controllers are used in the system, flux, speed and torque controller. Tuning of flux controller is quite simple, but in case of speed and torque, it became quite tricky because the output of the speed controller is the reference signal of torque controller. Moreover, there is no distinct method to tune the controllers in the vector control system. Still, the entire high-performance dynamic response of the machine depends on the perfect tuning of those controllers. From the above analysis, it is understood that system identification is essential to tune the PI controllers. But being an asynchronous machine, to obtain system transfer function in a decoupled manner is very difficult. To overcome this problem, the proposed model will be Conventional sine PWM modulated switching pulses are used to implement variable frequency drives for induction motor. Space vector modulated PWM switching pulse is used to fire IGBT. In the case of sine, PWM modulated switching; DC bus voltage utilization is 50% whereas in space vector modulated inverter 57.73% DC Bus voltage utilization can be achieved. <strong></strong></p>

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2

Petronijevic, Milutin, Nebojsa Mitrovic, Vojkan Kostic, and Bojan Bankovic. "Effects of unsymmetrical voltage sags on industrial adjustable speed drives." Serbian Journal of Electrical Engineering 6, no. 3 (2009): 495–505. http://dx.doi.org/10.2298/sjee0903495p.

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This paper researches unsymmetrical voltage sag influence on torque ripple in scalar controlled (V/Hz), rotor field oriented (RFO) and direct torque controlled (DTC) drives. Electric drives performance degradation during voltage sag mainly depends on the used control algorithm. Industrial drives with all three types control methods are experimentally tested. Experiments with digital observer's application confirm the proposed solution. .

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3

Travieso-Torres, Juan Carlos, Miriam Vilaragut-Llanes, Ángel Costa-Montiel, Manuel A. Duarte-Mermoud, Norelys Aguila-Camacho, Camilo Contreras-Jara, and Alejandro Álvarez-Gracia. "New Adaptive High Starting Torque Scalar Control Scheme for Induction Motors Based on Passivity." Energies 13, no. 5 (March 10, 2020): 1276. http://dx.doi.org/10.3390/en13051276.

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A novel adaptive high starting torque (HST) scalar control scheme (SCS) for induction motors (IM) is proposed in this paper. It uses a new adaptive-passivity-based controller (APBC) proposed herein for a class of nonlinear systems, with linear explicit parametric dependence and linear stable internal dynamics, which encompasses the IM dynamical model. The main advantage of the HST-SCS includes the ability to move loads with starting-torque over the nominal torque with a simple and cost-effective implementation without needing a rotor speed sensor, variable observers, or parameter estimators. The proposed APBC is based on a direct control scheme using a normalized fixed gain (FG) to fine-tune the adaptive controller parameters. The basic SCS for induction motors (IM) and the HST-SCS were applied to an IM of 200 HP and tested using a real-time simulator controller OPAL-RT showing the achievement of the proposal goal.

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4

Petronijevic, Milutin, Nebojsa Mitrovic, Vojkan Kostic, and Borislav Jeftenic. "Assessment of unsymmetrical voltage sag effects on AC adjustable speed drives." Facta universitatis - series: Electronics and Energetics 22, no. 3 (2009): 341–60. http://dx.doi.org/10.2298/fuee0903341p.

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This paper analyses the influence of unsymmetrical voltage sags on the increase of torque and speed deviation induction motor adjustable speed drives. The three following general types of induction motor drives control are analyzed: scalar controlled (V/Hz), rotor-field-oriented (RFO) and direct-torque-controlled(DTC). The analytical expression for variations of dc link voltage incorporated into the corresponding drive models and formulas for assessment of current/torque deviation are derived depending on the applied control algorithm. Afterwards, the presented theoretical results for the deterioration of motor drive performance due to voltage sags are validated experimentally. Measurements of sag-caused mechanical vibrations are used for the additional verification of the obtained results. .

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5

Meshcheryakov, Viktor, Tatyana Sinyukova, Alexey Sinyukov, and Oleg Vladimirov. "Analysis of the effectiveness of using the block for limiting the vibrations of the load on the mechanism of movement of the bogie with various control systems." E3S Web of Conferences 220 (2020): 01059. http://dx.doi.org/10.1051/e3sconf/202022001059.

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Damping load vibrations in an electric crane drive is an urgent topic for research. The swinging load has a negative effect on the mechanical part of the device, leading to its wear, and on the entire control system as a whole. To combat the swaying of the load, it is proposed to install a vibration damping block created on the basis of an equation describing the dependence of the change in the deviation of the load on the equilibrium position in the plane of movement of the cart. The control signals in the vibration damping unit are the parameters of truck acceleration, suspension length, and weight of the load. At the output of the vibration damping unit, a speed task is formed. A block diagram of the trolley drive control system has been developed. Both scalar systems and systems with direct torque control are used on trolley travel mechanisms. The paper analyzes the efficiency of using the vibration damping unit when using different control systems on the movement mechanism of the bridge crane trolley.

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6

Merentie, Tuomo. "ABB: Direct torque control." Industrial Robot: An International Journal 22, no. 2 (April 1995): 27–28. http://dx.doi.org/10.1108/eum0000000004183.

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7

Kromm, Andrey, Gennady Simakov, and Valery Topovsky. "Optimization of torque ripples in direct torque control drives." Proceedings of the Russian higher school Academy of sciences, no. 1 (July 8, 2021): 41–53. http://dx.doi.org/10.17212/1727-2769-2021-1-41-53.

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The article discusses the features of the synthesis of a hybrid method for commutation of a three-phase inverter in a classic version of drives with direct torque control (DTC), which involves the use of relay characteristics in the flux- and torque control blocks. It is proved that the output voltage of a converter based on a B6-inverter formed by only six basic vectors (excluding the zero vector) limits further optimization of flux- and torque ripples in the electrical motors. It has also been proven that with the classical drives with direct torque control, the torque ripples on the motor shaft are indeed higher than in systems with pulse width modulation. An analysis of the method was carried out which could allow reducing the amplitude of the torque ripples when drives with direct torque control are applied for motors supplied with only basic vectors of the inverter due to the modified (hybrid) method of inverter commutation. The conditions under which the hybrid control method of the inverter is really capable of reducing the amplitude of the motor flux- and torque ripples are considered. Based on the analysis of the proposed solution, the law of hybrid control of the inverter is presented by means of the formation of additional vectors of its output voltage via basic vectors of the inverter. The advantages of the method include the simplicity of drive control under development or in the existing drive control system, the implementation of which is carried out exclusively by a software product. With the absence of iterative methods of mathematics, the resources of microprocessor control units are reduced, which makes this method even more attractive in low-budget electrical drives that do not claim to be "high-end" of control blocks. The oscillograms are shown of a flux and current of motor with direct torque control motor application only with six base vectors of the output voltage of a semiconductor inverter and a drive with direct torque control by the hybrid method with additional voltage vectors based on the basic vectors of the inverter.

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8

Mahfouz, Ahmed A., Gamal M. Sarhan, and Abdel-Nasser A. Nafeh. "Microcontroller implementation of direct torque control." International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 18, no. 1 (2004): 85–94. http://dx.doi.org/10.1002/jnm.566.

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9

Rodríguez-Ponce, Rafael, and Francisco Gustavo Mota-Muñoz. "Microcontroller-Based Direct Torque Control Servodrive." Journal of Robotics 2020 (February 8, 2020): 1–11. http://dx.doi.org/10.1155/2020/9152494.

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Robot technology has become an integral part of the automotive industry in several tasks such as material handling, welding, painting, and part assembly. Therefore, the knowledge and skills to control the electric motors in these manipulators are essential for undergraduate electrical engineering students. Currently, the digital signal processor (DSP) is the core chip in industrial motor-control drives; however, the implementation of DSP control algorithms can be quite challenging for an experienced programmer, even more so for the novice. Considerable research has been done on this topic, although authors usually focus on DSP-based motor drives using popular control techniques such as field-oriented control (FOC). Although highly efficient, this approach is usually reserved for postgraduate education due to its complex structure and functionality. In this paper, the authors present a modular servodrive design on a low-cost, general-purpose microcontroller using the direct torque control (DTC) method, an alternative known for greater simplicity and torque response, compared with FOC. The system design was based on Micropython language allowing the software structure to be more manageable and the code to be more understandable. This design will be useful to undergraduates and researchers with interests in motor control design.

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10

Rifqi Zuber Ahmadi, Muhd Zharif, Auzani Jidin, Maaspaliza Azri, Khairi Rahim, and Tole Sutikno. "Improved Torque Control Performance in Direct Torque Control using Optimal Switching Vectors." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (February 1, 2015): 441. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp441-452.

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This paper presents the significant improvement of Direct Torque Control (DTC) of 3-phases induction machine using a Cascaded H-Bidge Multilevel Inverter (CHMI). The largest torque ripple and variable switching frequency are known as the major problem founded in DTC of induction motor. As a result, it can diminish the performance induction motor control. Therefore, the conventional 2-level inverter has been replaced with CHMI the in order to increase the performance of the motor either in dynamic or steady-state condition. By using the multilevel inverter, it can produce a more selection of the voltage vectors. Besides that, it can minimize the torque ripple output as well as increase the efficiency by reducing the switching frequency of the inverter. The simulation model of the proposed method has been developed and tested by using Matlab software. Its improvements were also verified via experimental results.

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11

Wu, Long, Liu Yi Ling, and Shuai Chen. "Direct Torque Control of Brushless DC Motor." Advanced Materials Research 591-593 (November 2012): 1651–54. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.1651.

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Due to the good performance of brushless motor, its application is widespread. Brushless DC motor has following advantages that are low interference, low noise, high efficiency and so on, so it was widely used in industrial and control field. But DC motor has larger current commutation torque ripple, greatly reduce their reliability and stability. This design using direct torque control strategy to reduce torque ripple, and compares the control results of PI controller with direct torque control method. In the process of regulating motor’s speed ，When adopts PI controller here has great overshoot and start time of speed is long than direct torque control, current pulse obviously severe than direct torque control. The simulation results show that overall effect of direct torque control is superior than double closed loop control. It fully explains that the control strategy in this paper is effective.

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12

Nacusse, Matías A., Mónica E. Romero, and Sergio J. Junco. "Reconfigurable Direct Torque and Flux Control with Torque Ripple Reduction." IFAC Proceedings Volumes 44, no. 1 (January 2011): 14826–31. http://dx.doi.org/10.3182/20110828-6-it-1002.00924.

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13

Beerten, J., J. Verveckken, and J. Driesen. "Predictive Direct Torque Control for Flux and Torque Ripple Reduction." IEEE Transactions on Industrial Electronics 57, no. 1 (January 2010): 404–12. http://dx.doi.org/10.1109/tie.2009.2033487.

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14

Feng, Chen, Xia Chaoying, and Hou Xiaoxin. "Study on the losing control problem of direct torque control in permanent magnet synchronous motor drive." Transactions of the Institute of Measurement and Control 41, no. 2 (April 25, 2018): 504–15. http://dx.doi.org/10.1177/0142331218765298.

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In direct torque controlled permanent magnet synchronous motor drives, when the rotor speed or the load torque changes, the effect of a certain voltage vector on the torque also changes. In heavy-load or high-speed operating conditions, the torque may lose control. This paper presents an intensive investigation into this issue. With the help of relevant derivative curves, the primary cause for the losing control problem is analysed. Further study reveals that the effect of a certain voltage vector on the load angle is no relevant for the load conditions. Based on this property, by replacing the torque hysteresis comparator with a load angle hysteresis comparator, a modified direct torque control called the load-angle-feedback direct torque control is proposed and the original superiorities of the direct torque control are well preserved. Comparison between the direct torque control and the proposed method shows that the load capacity and speed operation range may be obviously extended by utilizing the proposed method.

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15

Hu, Wei Chao, Yan Chao Li, Ze Bin Yang, and Huang Qiu Zhu. "Direct Torque Control of Bearingless Synchronous Reluctance Motor." Applied Mechanics and Materials 150 (January 2012): 36–39. http://dx.doi.org/10.4028/www.scientific.net/amm.150.36.

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The bearingless synchronous reluctance motor (BSynRM) is a multi-variable, nonlinear and strong-coupled system. To solve the difficult problem of precise decoupling in electric torque and radial suspension force control, the theory of direct torque control of traditional synchronous reluctance motor are applied to the torque control of a BSynRM in this paper. Based on mathematical models of the BSynRM, A direct torque control algorithm based on space vector pulse width modulation (SVM-DTC) is deduced. The SVM-DTC control system is designed and simulated. The simulation results show the control algorithm of SVM-DTC realizes decoupling in electric torque and radial suspension force control. The static and dynamic performance of electric torque, speed and radial suspension force of the BSynRM is excellent.

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16

Zhou, La Wu, and Shu Qi Shi. "Direct Torque Control of PMSM Based on Variable Parameter PI and Fuzzy Control." Applied Mechanics and Materials 130-134 (October 2011): 2530–34. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.2530.

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This paper discusses that conventional direct torque control (DTC) system of permanent magnet synchronous motor (PMSM) exists in the stator flux linkage and electromagnetic torque ripple faults, and puts forward a method using variable parameter PI controller and fuzzy controller respectively used to replace PI speed regulator and hysteresis comparator of the conventional direct torque control and constructs a new direct torque control system of permanent magnet synchronous motor. The experiment results showed that the improved system has good dynamic and static performance, less flux and torque ripple．

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17

Jiang, Hui Lue, Bo Liu, and Chuan Dao Liu. "A Direct Torque Control Driven Vessel Actuator Device." Applied Mechanics and Materials 651-653 (September 2014): 593–97. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.593.

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Actuator is one of the most important auxiliary mechanisms used to control the ship heading. Focused on the existed shortages of conventional hydraulic driven vessel actuator as complex structure, low efficiency and response etc, by the analysis of torque variation to access the impact of direct torque control and design an actuator used direct torque control of which is simple and easy to implement. Simulation results show that this scheme can reduce system without dynamic performance, low-speed operation to expand the scope of the system, reducing the torque ripple, while improving the low-speed torque of the motor.

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18

Maher, Azaza, Echaieb Kamel, and Mami Abdelkader. "FPGA-based Architecture of Direct Torque Control." International Journal of Reconfigurable and Embedded Systems (IJRES) 6, no. 1 (May 28, 2018): 20. http://dx.doi.org/10.11591/ijres.v6.i1.pp20-27.

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This paper presents an optimized FPGA architecture of a DTC “direct torque control” drive of an induction motor. The proposed architecture is based on variable fixed point world size and the use ipcores in order to achieve higher sampling frequency which leads to reduce the electromagnetic torque and flux ripples. The hardware implementation was experimentally validated, the results shows the effectiveness of the hardware DTC drive implementation by the minimization of the torque and flux ripple

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19

., Suresh Kumar Chiluka. "DIRECT TORQUE CONTROL USING NEURAL NETWORK APPROACH." International Journal of Research in Engineering and Technology 02, no. 04 (April 25, 2013): 682–86. http://dx.doi.org/10.15623/ijret.2013.0204049.

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20

Pawar, Mr Ravindra, and Prof Ashok Jhala. "Direct Torque Control of Induction Motor Drives." IJIREEICE 4, no. 1 (January 15, 2016): 108–11. http://dx.doi.org/10.17148/ijireeice.2016.4126.

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21

Sikorski, Andrzej, and Marek Korzeniewski. "Improved Algorithms of Direct Torque Control Method." Automatika 54, no. 2 (January 2013): 188–98. http://dx.doi.org/10.7305/automatika.54-2.173.

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22

Geyer, Tobias. "Computationally Efficient Model Predictive Direct Torque Control." IEEE Transactions on Power Electronics 26, no. 10 (October 2011): 2804–16. http://dx.doi.org/10.1109/tpel.2011.2121921.

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23

French, C., and P. Acarnley. "Direct torque control of permanent magnet drives." IEEE Transactions on Industry Applications 32, no. 5 (1996): 1080–88. http://dx.doi.org/10.1109/28.536869.

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24

Purcell, A., and P. Acarnley. "Device switching scheme for direct torque control." Electronics Letters 34, no. 4 (1998): 412. http://dx.doi.org/10.1049/el:19980256.

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25

Sidani, Maher, Fouad Mrad, and Farid Chaaban. "Adaptive Direct Torque Control of Induction Motors." Electric Power Components and Systems 36, no. 7 (June 17, 2008): 696–718. http://dx.doi.org/10.1080/15325000701881951.

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26

Gu, Chun Bo, Zhong Chu Wang, and Lin Liu. "Research of Direct Torque Control of Asynchronous Motor." Advanced Materials Research 986-987 (July 2014): 1112–16. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1112.

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Direct torque control (DTC) as a new type of motor control strategy, make the control system has good dynamic regulation performance. In this paper, we use the theory of direct torque control to research the speed regulation system of asynchronous motor direct torque control principle and its main component. Use Matlab/Simulink library to build the simulation model of induction motor DTC complete simulation and results show that the direct torque control run time has good control effect in asynchronous motor.

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27

Kim, Youn-Hyun, Sol Kim, Jae-Hak Choi, Joonseon Ahn, Chang-Hyun Cho, and Ju Lee. "Direct torque control of switched reluctance motor for minimizing torque ripple." International Journal of Applied Electromagnetics and Mechanics 28, no. 1-2 (September 5, 2008): 247–53. http://dx.doi.org/10.3233/jae-2008-982.

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28

Li, Zhenguo, Songfa Zhang, Shenghai Zhou, and Jin-Woo Ahn. "Torque Ripple Minimization in Direct Torque Control of Brushless DC Motor." Journal of Electrical Engineering and Technology 9, no. 5 (September 1, 2014): 1569–76. http://dx.doi.org/10.5370/jeet.2014.9.5.1569.

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29

Murata, Toshiaki, Takeshi Tsuchiya, and Ikuo Takeda. "Direct Torque Control System Synthesis for Induction Motor with Torque Feedback." IEEJ Transactions on Industry Applications 115, no. 5 (1995): 570–77. http://dx.doi.org/10.1541/ieejias.115.570.

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30

Sasaki, K., H. Goto, T. Watanabe, H. J. Guo, and O. Ichinokura. "Reduction of Torque Ripple in a SRM through Direct Torque Control." Journal of the Magnetics Society of Japan 29, no. 5 (2005): 577–81. http://dx.doi.org/10.3379/jmsjmag.29.577.

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31

Jidin, Auzani, New Lai Sim, and Tole Sutikno. "Improvement of Torque Capability of Direct Torque Control of Induction Machines." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 3 (September 1, 2017): 1070. http://dx.doi.org/10.11591/ijpeds.v8.i3.pp1070-1079.

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A control strategy for overmodulation operation of direct torque control hysteresis based in induction machine is proposed. The strategy is to extend the constant torque region as well as to improve the torque capability. The proposed overmodulation strategy is different to SVM based system where the reference stator voltage is available. In order for DTC hysteresis based system to be able to achieve that, several modifications have been applied so that the proposed overmodulation can be achieved by gradually transforming the PWM voltage waveform to six-step mode. Simulated results were provided to demonstrate the effectiveness of the strategy.

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32

Liu, Y., Z. Q. Zhu, and D. Howe. "Direct Torque Control of Brushless DC Drives With Reduced Torque Ripple." IEEE Transactions on Industry Applications 41, no. 2 (March 2005): 599–608. http://dx.doi.org/10.1109/tia.2005.844853.

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33

EL-KHOLY, E. E., S. MAHMOUD, R. KENNEL, A. EL-REFAEI, and F. ELKADY. "Torque Ripple Minimization for Induction Motor Drives with Direct Torque Control." Electric Power Components and Systems 33, no. 8 (August 2005): 845–59. http://dx.doi.org/10.1080/15325000590909804.

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34

Zhao, You Tao, Yan Cheng Liu, and Jun Jie Ren. "A Comparison between Vector Control and Direct Torque Control for the Marine PMSM." Advanced Materials Research 542-543 (June 2012): 1145–49. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.1145.

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In this paper the implementation of the vector control and direct torque control systems for a marine permanent magnet synchronous motor has been studied. A novel control method using space vector pulse width modulation was proposed. Then the simulation models with the vector control and direct torque control using the space vector pulse width modulation method have been established, respectively. Finally, the speed control performance of the systems was verified by simulation. The simulation results indicates that the systems used vector control or direct torque control technique can meet the requirements with the aspect of marine PMSM dynamic torque response. Meanwhile comparing to the different simulation results, the torque ripple was reduced in the vector control system.

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35

Xu, Yan Ping, Ke Guo, and Yan Ru Zhong. "High-Performance Speed Sensorless Direct Torque Control of PMSM." Applied Mechanics and Materials 130-134 (October 2011): 2828–31. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.2828.

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A high-performance speed sensorless direct torque control (DTC) system of permanent magnet synchronous motor (PMSM) is presented in this paper. The stator flux linkage, speed, rotor position and load torque of PMSM are observed using a fourth-order Extended Kalman Filter (EKF) and a second-order Kalman Filter (KF) and the observed load torque is used for feed-forward compensation of reference torque. Simulation results clearly demonstrate the performance of speed can be improved when load torque is changed and the validity of the proposed control strategy.

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36

Abdullah, Ali Najim, and Mohammed Hasan Ali. "Direct torque control of IM using PID controller." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (February 1, 2020): 617. http://dx.doi.org/10.11591/ijece.v10i1.pp617-625.

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Direct torque control "DTC" technique is one of a high performance control system of an AC motor drive, which was proposed after the vector oriented control scheme during the resent 25 years. It has been developed rapidly for its concise system scheme, transient and dynamic performance. The DTC mechanism consists of voltage vector selection table, two hysteresis comparators and two estimators one for stator flux and another for electromagnetic torque. DTC is directly control torque and flux by using Voltage Source Inverter VSI, space vector and stator flux orientation and indirect speed regulated. A several control techniques can be used for improving the torque and flux performance. In this paper, the DTC with Proportional-Integral-Derivative (PID) controller used to improve the starting and dynamic performance of asynchronous motor AM, which gives good torque and flux response, best speed control and also minimize the unacceptable torque ripple. The mathematical model of DTC with PID controller of 3-phase induction motor IM are simulated under Matlab-Simulink. Therefore, the DTC based on PID controller has good performance of IM compared to classical DTC for starting, running state and also during change in load.

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37

Bao, GuangQing, WuGang Qi, and Ting He. "Direct Torque Control of PMSM with Modified Finite Set Model Predictive Control." Energies 13, no. 1 (January 3, 2020): 234. http://dx.doi.org/10.3390/en13010234.

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A direct torque control (DTC) with a modified finite set model predictive strategy is proposed in this paper. The eight voltage space vectors of two-level inverters are taken as the finite control set and applied to the model predictive direct torque control of a permanent magnet synchronous motor (PMSM). The duty cycle of each voltage vector in the finite set can be estimated by a cost function, which is designed based on factors including the torque error, maximum torque per ampere (MTPA), and stator current constraints. Lyapunov control theory is introduced in the determination of the weight coefficients of the cost function to guarantee stability, and thus the optimal voltage vector reference value of the inverter is obtained. Compared with the conventional finite control set model predictive control (FCS-MPC) method, the torque ripple is reduced and the robustness of the system is clearly improved. Finally, the simulation and experimental results verify the effectiveness of the proposed control scheme.

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38

Abdel-Fadil, Reyad Mohamed, and László Számel. "Direct Instantaneous Torque Control of the Switched Reluctance Motor for Electric Vehicles Applications Using Fuzzy Logic Control." Acta Technica Jaurinensis 12, no. 2 (April 26, 2019): 101–16. http://dx.doi.org/10.14513/actatechjaur.v12.n2.496.

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This paper presents direct torque control of Switched Reluctance Motor (SRM) using Fuzzy Logic Control (FLC) for electric vehicles applications. The PD-FLC is proposed for SRM torque control, to keep the torque of the motor shaft in tracking the reference torque with high accuracy. With the help of FLC techniques, the SRM torque ripples can be reduced compared to traditional control techniques. In this study, the nonlinear 6/4 SRM model is simulated with the symmetrical converter, and the converter controller is programmed using C-language. The proposed method is tested at different load and variable speed conditions, and the obtained results confirm that the FLC direct torque control can be used for torque control to improve the motor performance and reduce the torque ripples compared to other techniques such as direct instantaneous torque control.

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39

Benevieri, Alessandro, Gianmarco Maragliano, Mario Marchesoni, Massimiliano Passalacqua, and Luis Vaccaro. "Induction Motor Direct Torque Control with Synchronous PWM." Energies 14, no. 16 (August 16, 2021): 5025. http://dx.doi.org/10.3390/en14165025.

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A novel induction motor direct torque control (DTC) algorithm with synchronous modulation is presented. Compared to the traditional DTC method, whose main drawback is the presence of low-frequency torque harmonics (sub-harmonics), in the proposed method, the PWM switching frequency is imposed to be an integer multiple of the main supply frequency. This is achieved by continuously adjusting the PWM switching period to significantly reduce low-frequency harmonics. The devised algorithm has been tested on an inverter-fed induction motor drive system, and the obtained results show an important reduction of the sub-harmonic spectral content of the developed torque with respect to a conventional direct torque control while maintaining at the same time a high dynamic response.

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Zou, Bowei, Yougui Guo, Xi Xiao, Bowen Yang, Xiao Wang, Mingzhang Shi, and Yulin Tu. "Performance Improvement of Matrix Converter Direct Torque Control System." Energies 13, no. 12 (June 23, 2020): 3247. http://dx.doi.org/10.3390/en13123247.

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In asynchronous motor direct torque control systems, the power supply using the matrix converter can achieve the effect of direct torque control and also has the advantages of the matrix converter. Nonetheless, direct torque control still has drawbacks in terms of pulsation. In this paper, the characteristics of direct torque control method and its existing problems are analyzed in depth. In view of the shortcomings of torque ripple, an improved scheme of torque tracking control is proposed based on conventional control methods. On the basis of theoretical simulation, DSP and FPGA algorithms are designed respectively in C language and VHDL to implement the proposed control strategy. Finally, a highly integrated experimental platform of matrix converter has been developed to verify the proposed control strategy. The simulation and experimental results verify the correctness and effectiveness of the improved scheme.

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Kozakevych, Ihor, and Kyrylo Budnikov. "Predictive control of induction motor drive." E3S Web of Conferences 280 (2021): 05006. http://dx.doi.org/10.1051/e3sconf/202128005006.

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The work is devoted to the study of the possibilities of using the predictive torque control system instead of the currently widely used direct torque control system. Aspects of using the system of direct torque control of an induction motor are considered and it is found that its significant disadvantage is the variable frequency of semiconductor switches. As a further development of the direct torque control system, a predictive torque control system is analyzed, which contains blocks for estimating unmeasured state variables, as well as predicting the state of a dynamic system when applying possible control signals. The systems were compared by mathematical modeling in Matlab / Simulink.

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Zhang, Jun Li, Yu Ren Li, Long Fei Fu, and Fan Gao. "The Implementation of Permanent Magnet Synchronous Motor Direct Torque Control." Advanced Materials Research 712-715 (June 2013): 2757–60. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.2757.

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In order to deeply understand the characteristics of the permanent magnet synchronous motor direct torque control method, its mathematical models were established in the two-phase stationary coordinate system, the two-phase synchronous rotating coordinate system, and x-y stator synchronous rotating coordinate system. The implementation process of direct torque control method in varied stator winding connection was analyzed in detail. In order to improve the speed and torque performance of the permanent magnet synchronous motor, the direct torque control block diagram and the space voltage vector selection table were given. Finally, the summary and outlook of reducing torque ripple in the permanent magnet synchronous motor direct torque control methods.

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GAJEWSKI, Piotr. "Direct Torque Control and Direct Power Control of wind turbine system with PMSG." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 10 (October 5, 2016): 251–55. http://dx.doi.org/10.15199/48.2016.10.56.

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Kadum, Arkan A. "New adaptive hysteresis band width control for direct torque control of induction machine drives." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (December 1, 2020): 1908. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp1908-1917.

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This paper presents a new adaptive hysteresis band control approach used in direct torque control (DTC) of the induction motor (IM) drives with the switching tables for the generation of PWM signals. Constant Hysteresis Direct torque control (CHB-DTC) method used the torque and stator flux errors to generate the stator voltage reference and frequency vectors for controlling the three-phase induction motor. The CHB-DTC gives better torque transient performance but it has large steady state ripples. To reduce torque and stator current ripples in CHB-DTC controlled induction motor drives a new adaptive hysteresis band control (AHB) approach is proposed, where the hysteresis band is adapted in real time with the stator flux and torque errors variation, instead of fixed bandwidth. Both classical CHB-DTC method and the proposed adaptive hysteresis band DTC (AHB-DTC) fed three induction motor have been simulated using Matlab/Simulink. The simulation results at different operating conditions over a wide speed range demonstrate the validity, effectiveness, and feasibility of the proposed scheme. The measurements showed that torque ripples were significantly decrease with the new AHB-DTC technique and better speed response in step up or down compared to the CHB-DTC.

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Ji, Xuande, Daqing He, and Yunwang Ge. "Study of Direct Torque Control Scheme for Induction Motor Based on Torque Angle Closed-Loop Control." Open Electrical & Electronic Engineering Journal 9, no. 1 (November 11, 2015): 600–609. http://dx.doi.org/10.2174/1874129001509010600.

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For disadvantages of the large flux and torque ripple and current waveform distortion of Direct Torque Control (BASIC-DTC), the DTC scheme for induction motor based on torque angle closed-loop control was presented and the proposed scheme was realized with three methods of torque angle closed-loop control. The main characteristics of three methods of torque angle closed-loop control for the proposed scheme was analyzed, emphasizing their advantages and disadvantages. The performance of three methods of torque angle closed-loop control for the proposed scheme was studied in terms of flux and torque ripple, current waveform distortion and transient responses. Simulation results showed that the proposed scheme improves the performance of induction motor BASIC-DTC by combining low flux ripple, low torque ripple and low current waveform distortion’s characteristics with fast dynamics.

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Kang, Bong Soo, Soo Hyun Kim, Yoon Keun Kwak, and Craig C. Smith. "Robust Tracking Control of a Direct Drive Robot." Journal of Dynamic Systems, Measurement, and Control 121, no. 2 (June 1, 1999): 261–69. http://dx.doi.org/10.1115/1.2802464.

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This paper presents a robust controller for tracking control of a direct-drive robot. The proposed controller consists of two portions: a computed torque method which precompensates for dynamics of the modeled plant and an H∞ controller which postcompensates for residual errors which are not completely removed by the computed torque method. Experimental methods for identifying appropriate model structure and parameters are presented, and three specific controller types are compared. Using the robot designed in our laboratory, the combined controller reduced tracking errors by one half compared to computed torque control alone, and by one sixth compared to conventional independent joint control.

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Romeral, L., A. Arias, E. Aldabas, and M. G. Jayne. "Novel direct torque control (DTC) scheme with fuzzy adaptive torque-ripple reduction." IEEE Transactions on Industrial Electronics 50, no. 3 (June 2003): 487–92. http://dx.doi.org/10.1109/tie.2003.812352.

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Inoue, Y., S. Morimoto, and M. Sanada. "Examination and Linearization of Torque Control System for Direct Torque Controlled IPMSM." IEEE Transactions on Industry Applications 46, no. 1 (2010): 159–66. http://dx.doi.org/10.1109/tia.2009.2036540.

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Liu, Qian, and Kay Hameyer. "Torque Ripple Minimization for Direct Torque Control of PMSM With Modified FCSMPC." IEEE Transactions on Industry Applications 52, no. 6 (November 2016): 4855–64. http://dx.doi.org/10.1109/tia.2016.2599902.

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Idris, N. R. N., and A. H. M. Yatim. "A Reduced Torque Ripple Controller for Direct Torque Control of Induction Machines." Electric Power Components and Systems 30, no. 5 (May 2002): 507–24. http://dx.doi.org/10.1080/15325000252888443.

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