Improving the control system of the wire laying unit of the thin drawing mill

2020 ◽  
pp. 71-75
Author(s):  
А.В. Белый
Keyword(s):  
Control System ◽  
Functional Diagram ◽  
Protection System ◽  
Electric Drives ◽  
Frequency Converters ◽  
Mode Of Operation ◽  
Reversal Mechanism ◽  
The Wire ◽  
Winding Wire ◽  
Drawing Mill

В статье приводится описание разработки усовершенствованной системы регулирования аппарата укладки проволоки на стане тонкого волочения. Модернизация системы регулирования направлена на устранение недопустимого режима работы стана, когда намотка проволоки на катушку осуществляется без ее равномерной укладки, вследствие выхода из строя механизма реверсирования укладчика. Разработана функциональная схема системы защиты от остановки укладчика в процессе намотки проволоки на катушку. Реализация данной схемы выполнена на базе существующих систем регулирования преобразователей частоты в электроприводах аппаратов намотки и укладки. Приведено описание работы защиты от остановки укладчика. The article describes the development of an improved system for regulating the apparatus for laying wire on a thin drawing mill. The modernization of the control system is aimed at eliminating the unacceptable mode of operation of the mill, when the wire is wound on a coil without evenly stacking it, due to failure of the stacker reversal mechanism. A functional diagram of the stacker stop protection system was developed during the process of winding wire onto a spool. The implementation of this scheme is based on existing systems for regulating frequency converters in electric drives of winding and stacking machines. The description of the operation of the protection against stopping the stacker is given.

scholarly journals SYNTHESIS OF A FUZZY TWO-LINKED REGULATOR FOR FREQUENCY ELECTRIC DRIVES OF A GRAIN MACHINE WITH A FOCUS OF THE GRAIN FLOW

2021 ◽  
Vol 3 (55) ◽  
pp. 16-23
Author(s):  
E. Burdilna ◽  
◽  
І. Konokh ◽  
S. Serhiienko
Keyword(s):  
Control System ◽  
Fuzzy System ◽  
Fuzzy Controller ◽  
Practical Application ◽  
Electric Drives ◽  
Frequency Converters ◽  
Grain Flow ◽  
Microprocessor Control System ◽  
Working Bodies ◽  
Definition Of

Purpose. A control system for grain overloading during post-harvest processing with grain throwers has been proposed, the use of which will reduce damage and grain loss. An automated electromechanical system is presented that can be installed on agricultural machinery without additional modernization of the working bodies. Methodology. As a result of the analysis of control systems, a system with elements of fuzzy logic was selected, which will clearly define the necessary control actions and take into account additional parameters that can affect the overload process. A functional diagram of a microprocessor control system for an electric drive using a fuzzy system is proposed. The result of the system operation will be the definition of the control task for the frequency converters of the drive motors of the grain thrower mechanisms. Originality. Based on the simulation of grain flight trajectories, the dependences of the flight range on the conveyor speed and additional blowing were formed, which were used to determine the settings of the fuzzy controller. Results. Fuzzy system settings are performed: a set of input and output variables is defined; the number and location of terms are selected; a set of production rules for the system is formulated. As a result of experimental modeling, graphs of the formation of mastering influences by a fuzzy controller under the condition of the appearance and disappearance of the headwind for different given distances of movement were obtained. Practical value. Practical application of the offered system will allow to reduce material losses from injury of the overloaded grain and to increase efficiency of work of the grain thrower. Figures 8, references 21.

Efficiency Increasing of Traction Electric Drives with Induction Motors and Vector Control System

2021 ◽  
Vol 92 (9) ◽  
pp. 476-480
Author(s):  
Yu. M. Inkov ◽  
A. S. Kosmodamianskiy ◽  
A. A. Pugachev ◽  
S. V. Morozov
Keyword(s):  
Control System ◽  
Vector Control ◽  
Induction Motors ◽  
Electric Drives ◽  
Vector Control System

High-voltage autotransformer frequency converters for electric drives

2008 ◽  
Vol 79 (10) ◽  
pp. 539-541
Author(s):  
A. G. Ivanov ◽  
N. V. Donskoi ◽  
V. A. Matison ◽  
I. I. Ushakov
Keyword(s):  
High Voltage ◽  
Electric Drives ◽  
Frequency Converters

scholarly journals EVALUATION AND SELECTION OF THE METHOD FOR CONTROL SYSTEM THE WIRE TENSION IN CUT-OUT ELECTRIC EROSION MACHINES

2021 ◽  
pp. 47-50
Author(s):  
M. N. Buza ◽  
N. O. Butusov ◽  
A. S. Voronin ◽  
A. G. Alekhin
Keyword(s):  
Control System ◽  
Wire Tension ◽  
Electric Erosion ◽  
The Wire ◽  
Selection Of

Variants of the electrode tension mechanism in an electric erosion machine are considered in order to ensure a quick change of the electrode thread and the required degree of tension.

scholarly journals Improving of operation stability of frequency converters with active rectifiers in electric steel-making complex electrical equipment switching

Vestnik IGEU ◽  
2019 ◽  
pp. 48-58
Author(s):  
A.A. Nikolaev ◽  
A.S. Denisevich ◽  
V.S. Ivekeev
Keyword(s):  
Control System ◽  
Power Supply ◽  
Electric Arc ◽  
Voltage Sags ◽  
Parallel Operation ◽  
Frequency Converters ◽  
Active Rectifier ◽  
Arc Furnaces ◽  
Operation Stability ◽  
Active Rectifiers

Frequency converters with active rectifiers (FC-AR) are now used in rolling mill electric drives. Modern control systems of ARs are not adapted to voltage sags in power supply systems, which leads to converter tripping. The known methods of ensuring AR operation stability, such as kinetic buffering, correction signals based on negative sequence voltage and others, do not eliminate these emergency trips. As an additional measure the paper proposes the method of voltage sag compensation by using static var compensators (SVC) of electric arc furnaces (EAF) for parallel operation of frequency converters with active rectifiers and electric arc furnaces. However, it remains unknown how disturbances (such as overvoltages of switching of SVC harmonic filters (HF) and voltage sags during furnace transformer switching) affect operation stability of frequency converters with active rectifiers. All this makes it necessary to study the effect of these processes on the operation conditions of FC-AR and to improve the active rectifier control system. The authors used experimental arrays of instantaneous values of voltages and currents of the real-life complex «EAF-SVC» («Electric Arc Furnace – Statistic VAR Compensator») in this study. They also applied mathematical models of FC-AR with different PWM algorithms realized in Matlab-Simulink software. The main assumption of the model consists in using equivalent current sources modelling the operation of autonomous voltage invertors. An improved control system of AR has been developed. The main feature that distinguishes it from the known systems is the fact that it ensures operation stability during SVC harmonic filter and EAF transformer switching by using a signal conditioning unit for setting the active rectifier reactive current component as a function of power supply and AR input voltage difference. Implementation of the improved AR control system improves FC-AR stability during parallel operation with EAFs through reactive power consumption of the supply system. As a result, it reduces the amplitude of inrush current and voltage deviations in the DC-link of the FC-AR to the values lower than the setpoints of the AR protection system.

Parameters formalization of adaptive protection system for automated communication control system

Trudy MAI ◽  
2020 ◽  
pp. 17-17
Author(s):  
Vladimir Filatov ◽  
Andrey Bonch-Bruevich ◽  
Evgeny Khokhlachev ◽  
Alexandra Borukaeva ◽  
Pavel Berdikov
Keyword(s):  
Control System ◽  
Protection System ◽  
Adaptive Protection ◽  
Communication Control

Research on Automatic Tape Vulcanizing Tank Hoisting Manipulator Based on PLC

2013 ◽  
Vol 373-375 ◽  
pp. 271-274
Author(s):  
Xiao Bin Pan ◽  
Yong Tao Li ◽  
Rong Zhou
Keyword(s):  
Control System ◽  
Solenoid Valve ◽  
Frequency Converters ◽  
The Core

In this paper, an automatic tape vulcanizing tank hoisting manipulator is designed to improve the accuracy and the efficiency in tape vulcanization. The hoisting manipulators control system takes Siemens S7-200 PLC as the core. By controlling two frequency converters and a solenoid valve, the hoisting manipulator not only movs along the Y-axis and Z-axis also clamps the vulcanizing mold. In addition, the hoisting manipulator communicates with the vulcanizing tank through PC / PPI bus and the RS232/485 interface port on PLC, achieving linkage production.

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