Selection Of Flow Diagrams Of The Adjustable Thyristor Asynchronous Electric Actuator With Phase Control

2020 ◽  
Vol 02 (11) ◽  
pp. 19-24
Author(s):  
Nematjon Akhmatovich Samatov ◽  
Keyword(s):  
Phase Control ◽  
Electric Motors ◽  
Electric Actuator ◽  
Electric Drives ◽  
Control Schemes ◽  
Flow Diagrams ◽  
Theoretical Foundations ◽  
Selection Of ◽  
Asynchronous Electric Motors

This article discusses the use of thyristors and the choice of a circuit in the control of adjustable asynchronous electric motors. The theoretical foundations and practical aspects of using various control schemes for asynchronous electric drives are presented.

Asynchronous electric motors for variable-frequency electric drives of drilling rigs

2009 ◽  
Vol 80 (1) ◽  
pp. 10-14
Author(s):  
B. I. Abramov ◽  
L. N. Makarov ◽  
B. M. Breslav ◽  
V. M. Ponomarev ◽  
B. M. Parfenov
Keyword(s):  
Variable Frequency ◽  
Electric Motors ◽  
Electric Drives ◽  
Drilling Rigs ◽  
Asynchronous Electric Motors

scholarly journals On the Physical Nature of the Problems of Frequency Control of Asynchronous Electric Drives

2020 ◽  
Author(s):  
Владимир Кодкин
Keyword(s):  
Vector Control ◽  
Transfer Functions ◽  
Frequency Control ◽  
Experimental Studies ◽  
Physical Nature ◽  
Electric Motors ◽  
Accurate Identification ◽  
Electric Drives ◽  
Nonlinear Transfer ◽  
Asynchronous Electric Motors

Abstract: The article proposes to consider the possibility of connecting the problems of engineering synthesis of frequency control systems for asynchronous electric drives with the basic provisions of the theory of identification of asynchronous electric motors based on the equations of a generalized AC electric machine.The article presents the results of experimental studies of load parrying processes in asynchronous electric drives with vector and scalar controls. These results indicate the absence of fundamental advantages as processes in a drive with vector control. This advantage should have manifested itself in a more efficient formation of the moment and fast transients. It is suggested that the reason for this is in too significant errors, assumptions and simplifications of the equations adopted in the derivation of vector control and which are its theoretical basis. A method is proposed for describing asynchronous electric motors by nonlinear transfer functions, which made it possible to formulate the principle of correction of electric drives and a method for assessing their efficiency.The article shows. that the correction based on the proposed nonlinear transfer functions of the induction motor is much more efficient than the traditional vector control, which was confirmed by detailed experiments and modeling. The results of the most important of which are given in the article. An assumption was made. that the advantage in efficiency is due to a more accurate identification of the dynamics of an asynchronous electric motor with a gear function instead of vector equations.

COMPARATIVE ASSESSMENT OF ENERGY EFFICIENCY OF ELECTRIC DRIVES WITH ASYNCHRONOUS ELECTRIC MOTORS AT VARIOUS CONTROL METHODS

2019 ◽  
Author(s):  
Nikolay Chuprina ◽  
Sergey Sedykh ◽  
Aleksandr Pugachev
Keyword(s):  
Energy Efficiency ◽  
Induction Motors ◽  
Comparative Assessment ◽  
Control Methods ◽  
Electric Motors ◽  
Power Losses ◽  
Electric Drives ◽  
Frequency Converters ◽  
Energy Indicators ◽  
Asynchronous Electric Motors

The main energy indicators of electric drives with inductions motors and frequency converters are given for various algorithms of scalyar control system of induction motors. The dependences of the power losses of the stator and rotor windings are obtained for various control methods, the analysis of the results is performed.

Linear electric motors in feed drives of multi-purpose machine tools

2020 ◽  
pp. 47-52
Author(s):  
A.A. Mahov ◽  
O.G. Dragina ◽  
P.S. Belov ◽  
S.L. Mahov
Keyword(s):  
Electric Motor ◽  
Machine Tools ◽  
Electric Motors ◽  
Linear Motors ◽  
Machining Center ◽  
Feed Drives ◽  
Selection Of

The possibility of using linear feed drives along the X and the Y axes in the portal-milling machining center is shown. The calculations of force indicators of drives, feed drives of traverse and carriage for two modes, as well as the selection of Siemens linear motors are given. Keywords milling machining center, drive, feed, linear electric motor. [email protected]

Selection of the optimal hydraulic drive for the press

2021 ◽  
pp. 50-60
Author(s):  
A.A. Antsifirov ◽  
V.A. Krivoshein
Keyword(s):  
Technological Process ◽  
Electric Motor ◽  
Software Package ◽  
Hydraulic Drive ◽  
Hydraulic Press ◽  
Topological Model ◽  
Electric Motors ◽  
Engine Operation ◽  
The Press ◽  
Selection Of

The research presented in the article is devoted to the selection of the electric motor of the hydraulic press drive with a nominal force of 5MN. The article presents the main characteristics and the description of the press operation using the means of mechanization of the technological process of pressure treatment. Using the Deform-3D software package, the process of stamping the crosspiece of the ZIL-130 cardan shaft was simulated. Based on the presented hydraulic scheme of the press, its topological model was formed in the PA-9 software package. The deformation force obtained in the course of modeling the technological process of stamping was used in the topological model of the press. Using a tabular cyclogram, the sequence of actuation of the end switches and hydraulic distributors during the stamping process is shown. In the article, two variants of engine operation were analyzed. Based on the results of the conducted research, it is necessary to focus on the second version of the 55 kW engine, the operation of which will provide the required characteristics of the hydraulic drive of the press, which in turn will allow for technological stamping operations. The simulation tools allow providing estimated information when selecting the necessary tools to ensure the optimal characteristics of hydraulic press drives. The article considered the variation of electric motors that differ from each other in nominal characteristics, with constant characteristics of the pump. For more accurate estimates of energy savings during the operation of the hydraulic drive, it is necessary to vary the characteristics of the pump in the simulation, and the best option is to form an experiment planning matrix when combining the characteristics of the electric motor and the hydraulic pump. This approach ultimately allows forming a function for which one can select a hydraulic drive from existing brands of electric motors and hydraulic pumps for presses of the corresponding range of nominal force.

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