scholarly journals CONSTANT SLIP CONTROL SYSTEM OF AN ASYNCHRONOUS MOTOR / PASTOVAUS SLYDIMO ASINCHRONINIO ELEKTROS VARIKLIO ROTORIAUS GREIČIO VALDYMO METODAS

2013 ◽  
Vol 5 (2) ◽  
pp. 139-142
Author(s):  
Martynas Šapurov ◽  
Raimondas Zubavičius ◽  
Vytautas Bleizgys
Keyword(s):  
Control System ◽  
Rotation Speed ◽  
Asynchronous Motor ◽  
Slip Control ◽  
Stator Current ◽  
Motor Current ◽  
Asynchronous Motors ◽  
Slip Method

Asynchronous motors are efficiently controlled using the scalar method. Main problems appear when the motor is fully loaded and desired rotation speed is slow. In such cases, the motor slip exceeds the magnitude of the nominal slip, causing the increase in stator current. The constant slip method was designed to control hardly loaded asynchronous motor. In this particular situation, the constant slip method provides a better efficiency than the scalar method. The magnitude of the motor current refers to the slip: the less is the slip, the less is the magnitude. It is impossible to find the optimal slip for minimization of current with the help of a model. Therefore, the nominal slip value was used as optimal. Article in Lithuanian. Santrauka Pasiūlytas pastovaus slydimo asinchroninio elektros variklio rotoriaus greičio valdymo metodas ištirtas modeliuojant, gauti rezultatai palyginti su skaliarinio valdymo metodo tyrimo rezultatais. Tyrimo rezultatai parodė, kad pastovaus slydimo asinchroninio variklio greičio valdymo metodas yra pranašesnis už skaliarinio valdymo metodą, kai valdomo variklio greitis yra nedidelis ir jo apkrova yra artima nominaliajai.

ALGORITHMIZATION OF ENERGY-SAVING CONTROL OF THYRISTOR POWER REGULATORS OF AUTOCLAVE PLANTS

2021 ◽  
pp. 30-35
Author(s):  
В.Л. Бурковский ◽  
Ю.В. Нефедов ◽  
Ту Ха Ань ◽  
В.Н. Крысанов
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Electromagnetic Compatibility ◽  
Asynchronous Motor ◽  
Polymer Composite Material ◽  
Parallel Operation ◽  
Power Losses ◽  
Original Algorithm ◽  
Power Regulator ◽  
Asynchronous Motors

Рассматривается вопрос комплексного принципа управления силовыми тиристорными регуляторами мощности автоклавных установок по производству полимерно-композитного материала. Для повышения уровня энергосбережения в асинхронных двигателях оборудования автоклава предлагается оригинальный алгоритм коммутации тиристорных ключей типового регулятора мощности на основе дополнительного использования системы импульсно-фазового управления, существенно снижающeй токовую перегрузку. Для оценки эффективности предложенного алгоритма был определен уровень дополнительных потерь электроэнергии в асинхронных двигателях на основе сравнительного анализа повышенных значений его фазных токов во время переходного процесса. Разработанная имитационная модель автоматизированной системы управления автоклавом показала возможности данного алгоритма обеспечить требуемое демпфирование нежелательных переходных процессов в асинхронных двигателях, вызванных параллельной работой мощных термоэлектрических нагревателей и, как следствие, снижение дополнительных потерь электроэнергии. Разработанный алгоритм управления типового регулятора мощности автоклава позволяет обеспечить повышение уровня энергосбережения при постоянном контроле и корректировке гармонического состава напряжения электрооборудования установки. На основании результатов проведенного имитационного моделирования определены значения снижения среднецикловых дополнительных потерь электроэнергии в асинхронном двигателе вентилятора автоклава при поддержании требуемого уровня электромагнитной совместимости силового оборудования The article discusses the issue of the complex principle of thyristor power control of autoclave units for the production of polymer-composite material. To increase the level of energy saving in asynchronous motors of the autoclave equipment, we offer an original algorithm for switching thyristor keys of a typical power regulator based on the additional use of a pulse-phase control system that significantly reduces current overload. To evaluate the efficiency of the proposed algorithm, we determined the level of additional power losses in asynchronous motors based on a comparative analysis of the increased values of its phase currents during the transition process. The developed simulation model of the automated autoclave control system showed the capabilities of this algorithm to provide the required damping of undesirable transients in asynchronous motors caused by the parallel operation of powerful thermoelectric heaters and, as a result, reducing additional power losses. The developed control algorithm of a typical autoclave power regulator allows us to ensure an increase in the level of energy saving with constant monitoring and correction of the harmonic composition of the voltage of the electrical equipment of the plant. Based on results of simulated simulation, we determined values of reduction of average cycle additional losses of electric power in asynchronous motor of autoclave fan while maintaining required level of electromagnetic compatibility of power equipment

The Simulation Research and Modeling of Asynchronous Motor's Vector Control

2013 ◽  
Vol 336-338 ◽  
pp. 484-488 ◽  
Author(s):  
Yu Fang Gong ◽  
Yu Gong ◽  
Xin Ying Li
Keyword(s):  
Control System ◽  
Vector Control ◽  
Pulse Width Modulation ◽  
Asynchronous Motor ◽  
Simulation Research ◽  
Asynchronous Motors ◽  
Three Phase ◽  
Rotor Flux ◽  
Vector Control System ◽  
The Mathematical Model

Based on the analysis of the mathematical model of the three-phase asynchronous motor and sine pulse width modulation principle, According to the theory of asynchronous motors vector control , software is building simulation model of asynchronous motors vector control system according to the rotor flux in Matlab/Simulink, analysis dynamic characteristics of rotational speed, torque and stator current ,provided the simulation results of the control system, verify the vector control is effective and feasible.

COMPUTER SIMULATION OF A SINGLE-PHASE ASYNCHRONOUS MOTOR

2020 ◽  
pp. 29-35
Author(s):  
S.Yu. Trudnev ◽  
Keyword(s):  
Computer Simulation ◽  
Single Phase ◽  
Asynchronous Motor ◽  
Computer Models ◽  
Virtual Model ◽  
Modes Of Operation ◽  
The Real ◽  
Matlab Program ◽  
Virtual Models ◽  
Asynchronous Motors

The most widely used single-phase asynchronous motors are described and also substitution and vector dia-grams are reviewed. Theoretical and mathematical descriptions of processes of controlling and enabling asynchronous modes of operation were provided, on the basis of which computer models of a single-phase asynchronous motor in static and dynamic modes was created in the Matlab program. Experiments were per-formed on the real and virtual models, and the data obtained were processed and compared to confirm the adequacy of the developed virtual model.

scholarly journals Development of a Fuzzy Slip Control System for Electric Vehicles with In-wheel Motors

2012 ◽  
Vol 1 (1) ◽  
pp. 46-64 ◽  
Author(s):  
Kiumars Jalali ◽  
Thomas Uchida ◽  
John McPhee ◽  
Steve Lambert
Keyword(s):  
Control System ◽  
Electric Vehicles ◽  
Slip Control

scholarly journals Formation of energy efficient start-brake modes of the frequency-controlled electric drive in production mechanism

2019 ◽  
Vol 104 ◽  
pp. 01006
Author(s):  
Maxim Filimonov ◽  
Nicolay Karnaukhov ◽  
Eugeny Lukyanov ◽  
Dmitry Smyatsky ◽  
Roman Mironenko
Keyword(s):  
Energy Efficient ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Electrical Power ◽  
Production Mechanism ◽  
Mass Model ◽  
Electrical Drive ◽  
Asynchronous Motors ◽  
Production Mechanisms ◽  
Nominal Mode

this article the energy efficient frequency way of starting of production mechanisms electrical drive with low power asynchronous motors (from 90 Wt to 5 kWt) is proposed. To provide this With the goal of electrical losses decreasing during asynchronous motor starting the Pontryagin Maximum Principle have been applied by the authors when analysing of two-mass model of production mechanism frequency controlled electrical drive. In result of calculations for frequency controlled electrical drive of production mechanism with 90 Wt power asynchronous motor of the model 4AA50A2 Dependencies of amplitude and frequency of supply voltage by the time are obtained. These dependencies confirm possibility of decreasing the electrical power losses with different values of motor shaft load torques. In compare with the other ways of asynchronous motor starting (for example U/f=const) they allow to decrease the electrical losses more then two times in nominal mode.

scholarly journals Forced dynamics control of an actuator with linear PMSM

2009 ◽  
Vol 22 (2) ◽  
pp. 183-195
Author(s):  
Ján Vittek ◽  
Vladimir Vavrús ◽  
Jozef Buday ◽  
Jozef Kuchta
Keyword(s):  
Control System ◽  
Control Method ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Control Law ◽  
Flux Vector ◽  
Stator Current ◽  
Current Vector ◽  
Filtering Effect ◽  
Speed Response

The paper presents design and verification of Forced Dynamics Control of an actuator with linear permanent magnet synchronous motor. This control method is a relatively new one and offers an accurate realization of a dynamic speed response, which can be selected for given application by the user. In addition to this, the angle between stator current vector and moving part flux vector is maintained mutually perpendicular as it is under conventional vector control. To achieve prescribed speed response derived control law requires estimation of an external force, which is obtained from the set of observers. The first observer works in pseudo-sliding mode and observes speed of moving part while the second one has filtering effect for elimination of the previous one chattering. The overall control system is verified by simulations and experimentally. Preliminary experiments confirmed that the moving part speed response follows the prescribed one fairly closely.

scholarly journals FLAT ASYNCHRONOUS ELECTRIC DRIVE OF STONE MILL

2019 ◽  
Vol 14 (2) ◽  
pp. 77-82
Author(s):  
Рустам Аипов ◽  
Rustam Aipov ◽  
Рустам Галиуллин ◽  
Rustam Galiullin ◽  
Раушан Нугуманов ◽  
...  
Keyword(s):  
Asynchronous Motor ◽  
Rotation Frequency ◽  
Point Of View ◽  
Working Zone ◽  
Electric Drives ◽  
Belt Drives ◽  
Asynchronous Electric Drive ◽  
Asynchronous Motors ◽  
Longitudinal Edge ◽  
Flour Production

In modern flour production, the preservation of all vitamins and minerals in it is relevant. Minerals and vitamins are stored in flour, ground from whole grains. In the stone mills, the grain is subjected to repeated exposure to the working surfaces of the millstones, as a result of which the flour contains a large percentage of the most important components of the grain. The stone mill’s drive should provide a low rotational speed of the mills (peripheral speed up to 10 m/sec.) and the possibility of smooth control of its speed and torque without reducing the performance of the mill. From this point of view, it is promising to use in the mill’s drive, instead of asynchronous motors, rotation with additional devices (gearboxes, belt drives, V-belt drives, etc.) of flat asynchronous electric drives. The article suggests possible variants of technical solutions for stone mills with flat electric drives. It was concluded that the use of a flat asynchronous motor in the mill’s drive allows not only smoothly adjusting the frequency and torque of the millstones, but also because of the presence of edge effects, to prevent flour sticking in the millstone working zone. Compiled with the possibility of solving by analytical methods a mathematical model of mill’s drive, based on a flat electric drives, taking into account the longitudinal edge effect, the strength of viscous (internal) and dry (external) friction. The mechanical characteristics of the drive were found when moving the flat electric drives inductors and the dependencies of the change in the mill productivity on the millstone rotation frequency when grinding various grains, changing the fill factor of the grinding zone and the gap between the millstones were obtained.

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