scholarly journals СИНТЕЗ ЗАКОНУ КЕРУВАННЯ ЕЛЕКТРОПРИВОДОМ ВЕНТИЛЯТОРА ЗЕРНОКИДАЧА ДЛЯ ФОКУСУВАННЯ ЗЕРНОВОГО ПОТОКУ

World Science ◽  
2021 ◽  
Author(s):  
Evgeniya Burdilnaya ◽  
Oleksii Chornyi ◽  
Valerii Tytiuk ◽  
Serhiienko Serhii
Keyword(s):  
Regression Model ◽  
Electric Drive ◽  
Lower Layer ◽  
Frequency Converter ◽  
Planning Theory ◽  
Experiment Planning ◽  
Control Law ◽  
Initial Speed ◽  
Urgent Problem ◽  
Grain Scattering

The work considers the solution to the urgent problem of reloading grain into vehicles and reducing its damage. The possibility of throwing grain at a given range by creating an appropriate ballistic flight path by adjusting the speed of the electric drive of the belt when it is powered by a frequency converter is substantiated. The problem of reducing the focus of grain scattering by forming the flow of grain and controlling its movement not only when moving on the belt, but also after the separation of the flow and its movement in the air. Focusing of the lower layer is achieved by giving it an additional initial speed, which is provided by the air flow from the fan installed under the belt. For the frequency converter of the electric drive of the fan, in the form of a regression model, the control law which considers parameters of grain and necessary range of transportation is synthesized. Experiment planning theory was used to synthesize the control law.

Research of Non-Sinusoidal Voltage in Frequency Converter of Medium Power Operation

2015 ◽  
Vol 792 ◽  
pp. 8-14
Author(s):  
Gennady Petrovich Kornilov ◽  
Ildar Ravil’evich Abdulveleev ◽  
Timur Rifkatovich Khramshin
Keyword(s):  
Comparative Analysis ◽  
Electric Drive ◽  
Power Grid ◽  
Frequency Converter ◽  
Harmonic Distortion ◽  
Structural Modeling ◽  
Harmonic Structure ◽  
Sinusoidal Voltage ◽  
Voltage Curve ◽  
Power Operation

The article presents the comparative analysis of influence frequency regulated electric drive and current electric drive to harmonic structure of voltage of power grid. There was obtained the dependence of total harmonic distortion (THD) of curve on loading power for 2 types of valve converters. The effectiveness is shown in use of filter compensating device, connected at low side of converting transformer. There were defined the ranges of filter adjusting for improving THD of voltage curve. The described solutions are performed by the structural modeling method of Simulink packet in Matlab environment.

Reasoning of the Use of TVR-IM Electric Drives of Closed-Loop Type by the Angular Velocity Observer for Solving Technological Problems

2014 ◽  
Vol 698 ◽  
pp. 131-135 ◽  
Author(s):  
V. Timoshkin ◽  
A. Glazyrin ◽  
L. Kozlova
Keyword(s):  
Angular Velocity ◽  
Electric Drive ◽  
Closed Loop ◽  
Frequency Converter ◽  
Electric Drives ◽  
Advantages And Disadvantages ◽  
Velocity Observer

This article describes the main advantages and disadvantages of electric drive TVR-IM compared with a frequency converter. The necessity to use electric drives TVR-IM and angular velocity observers to solve technological problems is substantiated. Promising directions in the field of constructing closed-loop by the speed observer systems TVR-IM are shown.

scholarly journals Energy-efficient control of a multi-section supercapacitor power supply of an electric drive

2018 ◽  
Vol 161 ◽  
pp. 02002 ◽  
Author(s):  
Vladimir Mozzhechkov
Keyword(s):  
High Voltage ◽  
Electric Drive ◽  
Power Supply ◽  
Energy Efficient ◽  
Mathematical Formulation ◽  
Power Source ◽  
Power Line ◽  
Control Law ◽  
Control Laws ◽  
Efficient Control

A method for synthesizing the control laws of a multi-section supercapacitor power supply of an electric drive is developed. The synthesized control law for an electric drive realizes the prescribed motion and minimizes the required capacitance of the power source. It is achieved through optimal disconnection and connection to the power line of the drive at designated times of one of the power supply sections. Reduction of the required capacitance of the power supply is achieved through a fuller discharge of some of its sections in motion conditions requiring a low level of electrical voltage and saving high voltage in other sections for the respective motion conditions. A mathematical formulation of the problem and a method of its solution is proposed. An example of the implementation of the proposed method is considered.

scholarly journals Vector control system of electric drive of grain machine conveyor

2021 ◽  
pp. 8-16
Author(s):  
Evgeniia Burdilna ◽  
Sergii Serhiienko ◽  
Oleksiy Chornyi
Keyword(s):  
Control System ◽  
Vector Control ◽  
Quality Indicators ◽  
Electric Drive ◽  
Frequency Converter ◽  
Regulation System ◽  
Speed Reduction ◽  
Idle Speed ◽  
Asynchronous Electric Drive ◽  
Vector Control System

Purpose. Synthesis of an automatic control system for an asynchronous electric drive of a grain thrower conveyor based on a frequency converter with vector control. Methodology. The research was carried out using methods of mathematical modeling of an electric drive; using methods of tuning optimization and regulator synthesis. The technique of synthesis of vector control systems is based on the representation of a non-stationary multi-connected object, which is an AC machine, in the form of a set of stationary subobjects with linear links in the main control channels. Findings. The study of the work of the subordinate regulation system, which implements the principles of vector control, oriented along the vector of the rotor flux linkage, has been carried out. The modeling of the processes of AM excitation, AM start-up at idle speed, nominal load surge, speed reduction has been carried out. It was found that the synthesized system is characterized by good quality indicators. The overshoot at start does not exceed 5%, the regulation time is 0.4 s, the torque limitation is carried out at a predetermined level. It has been proven that oscillatory processes in transient modes with significant torque surges with classical settings of loop regulators can be compensated by introducing artificial cross-links into the control part of the electric drive. Originality. A system of subordinate regulation of the blood pressure of the grain thrower trimmer conveyor has been implemented to set the speed of the grain flow with the aim of throwing grain at a given distance by creating an appropriate ballistic flight trajectory, which ensures a reduction in losses from damage to grain. Practical value. The structure of the vector control system of a frequency-controlled asynchronous electric drive with additional compensating cross-connections between active and reactive energy control channels is proposed to improve the quality indicators of the system.

scholarly journals Experimental study of the control of operating modes of a plate feeder based on the frequency-controlled electric drive

2021 ◽  
Vol 288 ◽  
pp. 01086
Author(s):  
Olimjon Toirov ◽  
Sardor Urokov ◽  
Utkir Mirkhonov ◽  
Hadha Afrisal ◽  
Dilnoza Jumaeva
Keyword(s):  
Experimental Study ◽  
Electric Drive ◽  
Frequency Converter ◽  
Mining Industry ◽  
Operating Mode ◽  
Technological Parameters ◽  
Operating Modes ◽  
Plate Feeder ◽  
The Moment ◽  
Harmonic Composition

An experimental study of the control of the operating modes of the plate feeder based on a frequency-controlled electric drive in the mining industry has been carried out. The graphs of measurements of the electrical parameters of the electric drive supplied from the frequency converter of the plastic feeder, instantaneous values of harmonic composition of voltage and current up to 50 harmonics, as well as changes in current and voltage harmonics over a period of 30 minutes were obtained. Measurement of oscillograms of voltage and current of each phase in operating mode and the moment of turning off and turning on the electric motor of the plastic feeder. The issues of control of starting modes of the plate feeder from frequency-controlled electric drives are considered. It has been determined that frequency start-up with the linear control law for the frequency of the plate feeder as a function of time and technological parameters are the most acceptable condition for starting modes.

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