Research of Vector Control for Asynchronous Motor System Based on MRAS

2012 ◽  
Vol 531-532 ◽  
pp. 769-772 ◽  
Author(s):  
Qing Hua Yao ◽  
Miao Cao
Keyword(s):  
Motor Control ◽  
Vector Control ◽  
Motor System ◽  
Asynchronous Motor ◽  
Performance Simulation ◽  
Speed Sensor ◽  
Torque Curve ◽  
Electric Equipment ◽  
Adjustment System ◽  
Speed Adjustment

A new speed-adjustment approach of vector control for asynchronous motor is presented in the paper based on MRAS, It adopts a rotate speed calculating module which is designed specifically replaced Conventional rotate speed detecting system. The approach overcomes some shortcomings that comes from the precision and installation of rotate speed sensor. Motor rotate speed and torque curve are observed under different parameters based on MATLAB, and are analysed statically and dynamically. Simulation result showed touque ripple of this speed-adjustment system is small and timing is smooth, which can satisfy the demand of most electric equipment for speed-adjustment performance. Simulation result can realize asynchronous motor Control effectively.

scholarly journals Research on Speed Sensorless Vector Control System of Asynchronous Motor Based on MRAS

2018 ◽  
Vol 160 ◽  
pp. 02006
Author(s):  
Zili Liao ◽  
Qijin Zhao ◽  
Xinxi Zhang ◽  
Luming Chen
Keyword(s):  
Control System ◽  
Vector Control ◽  
Asynchronous Motor ◽  
Speed Sensorless ◽  
Speed Sensor ◽  
Sensorless Vector Control ◽  
Static Performance ◽  
Vector Control System ◽  
Hysteresis Control ◽  
Model Reference Adaptive

This paper analysed the basic principle of speed sensorless vector control system. Based on speed and current closed loop vector control, combined with a simple and feasible current hysteresis control strategy, the whole speed sensorless system of asynchronous motor is simulated in MATLAB/Simulink. The method uses the Model Reference Adaptive System (MRAS). The observation and analysis of waveform shows that the system has good static performance and robustness. The control effects are also as similar as the vector control system which contains speed sensor.

scholarly journals Modeling and analysis of vector control systems for asynchronous motor

2020 ◽  
Vol 220 ◽  
pp. 01075
Author(s):  
Viktor Meshcheryakov ◽  
Tatyana Sinyukova ◽  
Vladislav Gladyshev ◽  
Alexey Sinyukov ◽  
Lyudmila Solovieva ◽  
...  
Keyword(s):  
Motor Control ◽  
Control System ◽  
Vector Control ◽  
Control Systems ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Dc Motor ◽  
Modeling And Analysis ◽  
Dc Motor Control ◽  
The Moment

At metallurgical enterprises, slab transfer devices are widely used, the principle of operation of which is to lift slabs in the steel casting area and transport them to the storage area. The article considers the existing control system of the slab transfer device. At the moment, the mechanism has a DC motor controlled by a thyristor Converter. This system is difficult to maintain and has a large size. As an upgrade, the installation of an asynchronous motor with a frequency Converter is proposed. In the Matlab environment, mathematical models of single-circuit and double-circuit DC motor control systems and a model of asynchronous motor with a short-circuited rotor have been developed. A vector control system is used as an AC motor control system. As a result of simulation performed analysis of the characteristics. As an optimization of the system with vector control, in order to reduce dynamic loads on the turntable, it is proposed to introduce an intensity setter into the system, the use of which provides the necessary restriction of accelerations and jerks, reduces shock loads on the mechanical components of the electric drive, including a reduction in the load on the turntable when lowering the slab.

scholarly journals Development of electric drive system with vector control in the facility of inter-stand cooling of sheet rolled product

2019 ◽  
Vol 75 (3) ◽  
pp. 350-354 ◽  
Author(s):  
K. V. Litsin ◽  
T. V. Koval’chuk
Keyword(s):  
Vector Control ◽  
Electric Drive ◽  
Rolled Product ◽  
Asynchronous Motor ◽  
Drive System ◽  
Automation System ◽  
Nominal Data ◽  
Electric Drive System ◽  
Motor Problems ◽  
Electric Equipment

Modernization of the pusher electric drive of inter-stand cooling facility of sheet rolled product is an actual way to increase efficiency of rolling production. The control by the existing electric drive is accomplished by a system, comprising an asynchronous motor. Problems of automation of the facility of inter-stand cooling of sheet rolled product of JSC “Ural steel” sheetrolling shop considered. Modernization of existing system by implementation of frequency convertor with vector control proposed. To restrict the pusher movement it proposed to use induction sensors and controller SIMATIC S7-300. Algorithm of the pusher operation with induction sensors application considered. The elaborated algorithm of the pusher operation realized on the base of SIMATIC S7-300 controller. Calculation and building of load diagram and the pusher drive tachometric diagram accomplished for one cycle of its operation. Taking into account nominal data of the pusher selected motor and requirements to electric equipment, a frequency convertor with vector control was selected. Implementation ofthe system “frequency convertor – asynchronous motor” with vector control justified. The vector control enables to provide a preset pace of the motor acceleration, its complete protection against over-loading that increases considerably service life of the electric drive system as a whole. Application of frequency controlled pusher drive together with SIMATIC S7-300 controller will enable to automatize the process of the pusher operation. Implementation of the developed automation system of the pusher electric drive operation is possible also at other steel-works.The payback period of the solutions proposed within the frame of the project will be 9 months.

scholarly journals Speed control of the asynchronous motor using LabVIEW

2021 ◽  
Vol 8 (5) ◽  
pp. 59-66
Author(s):  
Petru Livinti ◽  
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Asynchronous Motor ◽  
Speed Control ◽  
Pi Controller ◽  
Motor Speed ◽  
Experimental Stand ◽  
Three Phase ◽  
Adjustment System ◽  
Speed Adjustment

This paper was presented a comparative study on the methods of adjusting the speed of a three-phase asynchronous motor with a rotor in a short circuit. For the same structure of the experimental stand used, two programs were created, implemented, and validated in LabVIEW. For the first method, the program in LabVIEW was made with the PI (proportional-integrative) controller and for the second method, the program in LabVIEW was made with the Fuzzy Logic controller. Following the analysis of the resulting graphs, it was found that the speed control system made with the fuzzy logic controller ensures an increase in its performance compared to the speed control system made with the conventional PI type controller. The indicial responses of the adjustment system of the three-phase asynchronous motor speed with PI controller or Fuzzy Logic controller have been determined in real-time by means of the experimental stand. The override of the speed adjustment system is decreased from the value of 26.9% corresponding to the PI controller to the value of 2.3% corresponding to the Fuzzy Logic controller and the duration of the transient time is decreased from the value of 2.2 s related to the PI controller to the value of 0.5 s, related to the Fuzzy Logic controller. By using the Fuzzy Logic controller, the amount of electrical energy required to supply the electric drive system made with a three-phase asynchronous motor will be reduced. This three-phase asynchronous motor speed adjustment algorithm can be implemented for other electric drive systems from different industrial applications.

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