scholarly journals Effect of asymmetry of supply voltages on asynchronous motor operation modes

2018 ◽  
Vol 58 ◽  
pp. 03013
Author(s):  
Victoria Romanova ◽  
Sergey Khromov
Keyword(s):  
Asynchronous Motor ◽  
Motor Shaft ◽  
Simulation Experiments ◽  
Software Complex ◽  
Voltage Unbalance ◽  
Operation Modes ◽  
Asynchronous Motors ◽  
Package Program ◽  
Supply Voltages ◽  
Motor Operation

Effect of asymmetry of supply voltages on asynchronous motor operation modes was investigated using the computer-aided simulation experiments, the software complex Matlab and the package program Simulink. Publication relevance is determined by the necessity for performance of comparative analysis of the level of effect of asymmetry of supply voltages on asynchronous motors of different series and power capacities. Six motors of three different power capacities (5.5, 55, 160 kW) and of two different series (4A, AI) were modeled for investigation. The value of asymmetry of supply voltages was changed from 0 to 5%. The motor shaft load was changed from 0 to 120% of the motor rated load. Comparison of dependencies of the phase currents on the voltage unbalance ratio by reverse sequence (K2U) of asynchronous motors with short-circuited rotor series 4A and AI was made. The analysis and discussion of obtained investigation results were performed, recommendations on operation of asynchronous motors series 4A and AI in conditions of asymmetry of supply voltages were given.

scholarly journals Operational reliability of low-voltage asynchronous motors at asymmetrical supply voltage

2019 ◽  
Vol 139 ◽  
pp. 01053
Author(s):  
Victoria Romanova ◽  
Sergey Khromov
Keyword(s):  
Low Voltage ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Operational Reliability ◽  
Motor Shaft ◽  
Operating Modes ◽  
Squirrel Cage ◽  
Asynchronous Motors ◽  
Technical Solutions ◽  
Supply Systems

Issues of operating modes of 4A series asynchronous squirrel-cage motors and AI serried motors at asymmetrical supply voltage for different values of motor shaft load are considered on the basis of simulation using Matlab software package and Simulink package. In the simulation, currents in asynchronous motor phases were evaluated as a function of K2U, KZ, and based on these results, permissible operation parameters were evaluated for induction motors. The results obtained are the basis for technical solutions aimed at improving operational reliability of asynchronous motors, they will allow taking into account permissible operating parameters of asynchronous motors not only in the design, but also in operation in power supply systems of various facilities.

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 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 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.

scholarly journals Modeling of three-phase electric motor operation by the MATLAB system with deteriorated power quality in the 0.38 kV distribution networks

2018 ◽  
Vol 58 ◽  
pp. 03016 ◽  
Author(s):  
I.V Naumov ◽  
N.V. Savina ◽  
M.V. Shevchenko
Keyword(s):  
Induction Motor ◽  
Power Quality ◽  
Electric Motor ◽  
Distribution Networks ◽  
Negative Sequence ◽  
Operation Modes ◽  
Three Phase ◽  
Sequence Components ◽  
Motor Operation ◽  
The Impact

One of the main operation modes that characterizes power quality in distribution networks is asymmetry of three-phase voltage system. Operation of an induction motor (IM) with disturbed voltage symmetry in the supply network can not be considered as a rated one. The system of voltages applied to the stator winding of IM under these conditions contains positive- and negative-sequence components. This worsens the performance characteristics of IM essentially. In order to balance the 0.38 kV network operation and enhance the efficiency of the three-phase electric motor operation it is suggested to use a special balancing unit (BU) that minimizes the negative-sequence components of current and voltage. The operation modes of the obtained system “supply source – induction motor – balancing unit” are simulated within the MATLAB software package of applied programs, which allows one to assess the impact of low quality of power on the operating characteristics of the electric motor and the efficiency of the balancing unit to increase the “durability” of the motor under the asymmetrical power consumption.

Simulation and Study of SPWM Variable-Frequency Drives of Asynchronous Motors Based on Aerostatic Guide Way

2014 ◽  
Vol 989-994 ◽  
pp. 2807-2810
Author(s):  
Wei Long ◽  
Yan Liu ◽  
Xiao Long Zhang ◽  
Ting You Wang
Keyword(s):  
Coordinate Transformation ◽  
Asynchronous Motor ◽  
Dc Motor ◽  
Regulation System ◽  
Variable Frequency ◽  
Speed Regulation ◽  
Asynchronous Motors ◽  
Variable Frequency Drives ◽  
Inverter Circuit

The asynchronous motor is converted to a model similar to DC motor to control through coordinate transformation, and adopt SPWM inverter circuit, the motor runs with load implements ideal speed and steady operation, providing appropriate speed for aerostatic guide way. Realize simulation of asynchronous motor variable frequency speed regulation system by simulink.

The Boot Method Analysis of Three-Phase Asynchronous Motor

2013 ◽  
Vol 401-403 ◽  
pp. 308-311 ◽  
Author(s):  
Miao Shang ◽  
Guo Min Lin ◽  
Qiang Hua Guo ◽  
Yong Tao Sun
Keyword(s):  
Asynchronous Motor ◽  
Advantages And Disadvantages ◽  
Squirrel Cage ◽  
Asynchronous Motors ◽  
Three Phase ◽  
Method Analysis ◽  
Starting Torque

The boot method of three wound-rotor asynchronous motors and three-phase squirrel-cage asynchronous motor are described; As to reduce the start current and to increase the starting torque, the principle of all kinds of startup methods are analyzed; the advantages and disadvantages of various starting methods are evaluated; Development directions of modern motor startup are pointed out.

scholarly journals Development of Asynchronous Motor Bearing Fault Diagnosis Method using TDA and FFNN

2019 ◽  
Vol 8 (10) ◽  
pp. 2622-2625
Keyword(s):  
Early Stage ◽  
Asynchronous Motor ◽  
Time Domain Analysis ◽  
Process Industry ◽  
Feed Forward Neural Network ◽  
Bearing Fault Diagnosis ◽  
Asynchronous Motors ◽  
Diagnosis Method ◽  
Detection And Diagnosis ◽  
The Cost

Asynchronous motors (AM) are life line of any process industry. Malfunctioning of AM at any stage of process leads the cost of finish product and decrease the efficiency of plant. Hence detection and diagnosis of AM failure at early stage is essential for timely maintenance and enhance the overall efficiency of the plant. The work present in this paper focuses on the bearing faults of AM. For this purpose experimental setup is developed in laboratory and results are based on experimental study carried out in laboratory by analysing AM generated vibration signals using time domain analysis (TDA) and feed forward neural network (FFNN).

scholarly journals Imitation Modeling of an Inter-Turn Short Circuit of an Asynchronous Motor Stator Winding for Diagnostics of Auxiliary Electric Drives of Transport Infrastructure

2021 ◽  
Vol 23 (2) ◽  
pp. C65-C74
Author(s):  
Sergey Goolak ◽  
Juraj Gerlici ◽  
Oleg Gubarevych ◽  
Tomáš Lack ◽  
Mikhail Pustovetov
Keyword(s):  
Short Circuit ◽  
Asynchronous Motor ◽  
Ac Impedance ◽  
Transport Infrastructure ◽  
Stator Winding ◽  
New Approach ◽  
Electric Drives ◽  
Imitation Modeling ◽  
Asynchronous Motors ◽  
Diagnostic Complex

A scientific approach to calculating the parameters and characteristics of an asynchronous motor in the inter-turn short circuit mode in one phase of the stator is proposed to create the foundations of a diagnostic complex for assessing the condition of asynchronous motors of the transport infrastructure. This approach consists of the fact that in the model with which the research is carried out, it is proposed to take into account changes in the mutual inductance of the motor when the AC impedance of one of the stator phases changes. Using a new approach to modeling processes occurring in an asynchronous motor during the inter-turn short circuit in one phase of the stator, pulsations of the torque on the motor shaft were studied for different values of the AC impedance and resistance of one of the stator winding phases, which corresponds to varying degrees of the inter-turn short circuits.

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