scholarly journals Electric Drive for an Agricultural Vehicle

2021 ◽  
Vol 15 (3) ◽  
pp. 48-54
Author(s):  
A. P. Sporov ◽  
D. Yu. Pisarev ◽  
A. S. Parakhnich
Keyword(s):  
Electric Drive ◽  
Electric Motor ◽  
Frequency Converter ◽  
Experimental Studies ◽  
Schematic Diagram ◽  
Vehicle Model ◽  
Drive Control ◽  
Experimental Vehicle ◽  
Storage Batteries ◽  
Alternating Voltage

Abstract. The authors showed the relevance of creating agricultural machines using an electric drive. (Research purpose) The research objective is to develop an experimental prototype vehicle using an electrical schematic diagram of charge and electric drive control. (Materials and methods) The VAZ 111 Oka car was chosen as an experimental vehicle model with an electric drive, since it has a light weight of 645 kilograms, a simple design and a low cost. Mechanical characteristics of the electric motor were calculated and a frequency converter was chosen to control the electric drive.  Laboratory bench tests were conducted. (Results and discussion)The authors   installed storage batteries to power the electric drive, developed an electrical circuit schematics getting charged from a 220 volt alternating voltage network, and received graphs for the discharge of a 40-storage-battery power supply. (Conclusions) An electrical schematic diagram of charge and electric drive control was developed and implemented on an experimental vehicle model. It was determined that at the electric motor continuous operation with the load current of 1 ampere, the batteries get discharged within 104 minutes;  with the current  load of 2 amperes, they get  discharged within 83 minutes; with 3 amperes – within 65 minutes, and with 5 amperes – within 50 minutes, which is enough to drive around the farm. The authors graphically depicted the dependence of the available capacity level on the voltage, as well as the batteries’ discharge on the time at various load currents. The authors carried out two experimental studies on storage batteries’ charging from alternating voltage with the current of 2 and 3 amperes: in the first case, the charging time was 350 minutes, in the second – 310 minutes. It was found out that when using the developed scheme, the batteries are charged evenly.

scholarly journals The use of a digital controller in the loading system of the test bench to improve the accuracy of simulating the modes of oil pumping units

2020 ◽  
Vol 220 ◽  
pp. 01072
Author(s):  
Timur Petrov ◽  
Vladimir Kornilov ◽  
Alfred Safin ◽  
Nikita Kuvshinov ◽  
Alexey Tsvetkov ◽  
...  
Keyword(s):  
Electric Motor ◽  
Test Bench ◽  
Mechanical Load ◽  
Frequency Converter ◽  
Experimental Studies ◽  
Test Automation ◽  
Operating Modes ◽  
Automation Systems ◽  
Loading System ◽  
Pumping Units

Modern trends in the development of technologies are based on the need to conduct experimental studies of the developed equipment in laboratory conditions with the maximum approximation of operating modes to real ones. Such studies are impossible without the development of specialized stands with test automation systems. In modern test equipment systems, devices are often used to create a mechanical load on the shaft of the electric motor under study. As such a device, a system of frequency converter load asynchronous electric motor has been proposed and implemented, which has been tested at the test bench and has proven itself from the best side in comparison with traditional circuits using DC motors.

scholarly journals Modernization of Control Systems of Electric Drives of Mine Lifting Machines

2018 ◽  
Vol 41 ◽  
pp. 03006
Author(s):  
Ziyodullo Eshmurodov ◽  
Folib Holboiv
Keyword(s):  
Control System ◽  
Control Systems ◽  
Electric Drive ◽  
Control Algorithm ◽  
Frequency Converter ◽  
Automated Control ◽  
Electric Drives ◽  
Squirrel Cage ◽  
Drive Control ◽  
Efficient Control

The article shows the peculiarity of the system of technological automation of the newest Simatic S7-1500 PLCs, for electric drives of hoisting transport machines, the analysis of control systems for electric drives of operating mine hoisting machines of mining complexes. One of the main ways to increase the energy efficiency of MLM is to replace old asynchronous electric motors with a phase rotor with squirrel cage induction motors designed for operation in a frequency-controlled electric drive. The introduction of a frequency converter and an electric drive control system, which together allow the recovery of electricity in the supply network in the mode of generator braking. Thus, the system for automated control of the mine hoisting machine based on the Simatic S7-1500 PLC, with the developed control algorithm, is an integrated energy-efficient control system, which it is advisable to use in the management of the SHM.

scholarly journals Stop ModeSimulation for an Asynchronized Vent Motor Fed by a Voltage Inverter

2020 ◽  
Vol 20 (3) ◽  
pp. 132-136
Keyword(s):  
Mathematical Modeling ◽  
Electric Drive ◽  
Frequency Control ◽  
Frequency Converter ◽  
Excitation Frequency ◽  
Control Unit ◽  
Current Phase ◽  
Automatic Frequency ◽  
Voltage Inverter ◽  
Drive Control

The paper presents the results of mathematical modeling of a sensorless electric drive control system operation. This system is based on a dependent voltage inverter with current phase control and phase-locked loop frequency control and feeds an asynchronous valve motor in the stop mode. The article presents the developed model of this electric drive in the MATLAB mathematical modeling system. The model features an excitation frequency converter, that maintains a nominal rotor current and a constant excitation frequency of 15 Hz. From the stator (armature) side, the frequency converter is synchronized in phase with the current using an automatic frequency control unit and sets the phase angle between the current and the armature voltage. The paper presents a basic system of equations that describes the modes of operation of an asynchronized valve motor, as well as the expression of the electromagnetic moment in the stop mode. It shows the electromagnetic torque on the motor shaft, which was obtained as a result of mathematical modeling of the thrust mode of an asyn­chronized valve motor at rated currents, the rotor frequency of 15 Hz, with 20 electrical degrees phase shift between the current and the armature voltage.

scholarly journals INVESTIGATION OF OPERATING MODES OF FREQUENCY-REGULATED ELECTRIC DRIVE OF PUMPJACK

2019 ◽  
Vol 20 (11-12) ◽  
pp. 56-64
Author(s):  
R. F. Yarish ◽  
A. R. Garifullina ◽  
R. I. Garifullin ◽  
A. N. Yakunin
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Electric Motor ◽  
Frequency Converter ◽  
Operating Mode ◽  
Operating Modes ◽  
Dynamometer Card ◽  
The Mathematical Model

The analysis of the operating modes of the frequency-controlled electric drive of the pumpjack with the use of dynamometer cards, wattmeter diagrams and the mathematical model of the pump-jack, the effect of the shape of the dynamometer card on the operating mode of the electric motor of the pumpjack is determined. The ways of protection of the transistors in the frequency converter from voltage increase are considered at the transition of the electric motor to the regeneration.

scholarly journals Influence of Hydraulics on Electric Drive Operational Characteristics in Pump-Controlled Actuators

Actuators ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 321
Author(s):  
Viacheslav Zakharov ◽  
Tatiana Minav
Keyword(s):  
Stability Analysis ◽  
Electric Drive ◽  
Electric Motor ◽  
Pulse Width Modulation ◽  
Frequency Converter ◽  
Process Time ◽  
Stable Operation ◽  
Model And Simulation ◽  
Operational Characteristics ◽  
The Impact

Transitioning from a valve- to pump-controlled system has been observed in working hydraulics to reduce energy consumption and accelerate the response to decarbonization requirements in Non-road Mobile Machinery (NRMM). The utilization of an electric motor as a prime mover significantly enhances the chances of completing this task. While the concept of combining hydraulics with an electric motor is not new, the functionality of electro-hydraulics can be improved due to multidisciplinary domains, the impact of the electric drive and its control is usually underestimated. Thus, this study aims to evaluate the influence of hydraulics on electric drive operational characteristics in pump-controlled actuators. It utilizes an electro-hydraulic model and simulation study under various conditions, a stability analysis, and a Pulse Width Modulation (PWM) of the frequency converter (FC) evaluation on a selected variable speed pump-controlled actuator to demonstrate the influence of hydraulics on an electric drive. Experimental validation of the model demonstrated an acceptable accuracy of 5%. Moreover, the stability analysis indicated a rise time of about 0.051 s, an overshoot of 0.53%, a transient process time of 0.13 s, and a steady-state value difference of 0.16%; all of which guarantees stable operation of the electric drive with a hydraulic load. In addition, an optimal PWM of an FC frequency of 5 kHz was selected to guarantee accurate speed control with minimum overshoot.

scholarly journals Analysis of the control system of electric motors of the running gear of self-propelled mine cars used in complex mining and technological conditions

2020 ◽  
Vol 216 ◽  
pp. 01135
Author(s):  
Alim Haqberdiev ◽  
Javokhir Toshov
Keyword(s):  
Motor Control ◽  
Control System ◽  
Control Systems ◽  
Electric Drive ◽  
Electric Motor ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Electric Motors ◽  
Power Circuit ◽  
Motor Control Systems

This article discusses the disadvantages of electric motor control systems for the running gear of mine self-propelled cars of the 5vs-15M brand used for transporting ore to conveyor transport at the Tyubegatan potash Deposit and analyzes the use of a control system with a frequency Converter. Based on the results of the analysis of the recommended possible options for the electric drive, it is advisable to conduct further studies of the electric drive based on an asynchronous motor and a power circuit of a frequency converter.

scholarly journals Insulation Life Span of Low-Voltage Electric Motors—A Survey

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1738
Author(s):  
Vanessa Neves Höpner ◽  
Volmir Eugênio Wilhelm
Keyword(s):  
Life Span ◽  
Electric Motor ◽  
Low Voltage ◽  
Frequency Converter ◽  
Rate Of Change ◽  
High Rate ◽  
Switching Frequency ◽  
Electric Motors ◽  
Frequency Converters ◽  
High Switching Frequency

The use of static frequency converters, which have a high switching frequency, generates voltage pulses with a high rate of change over time. In combination with cable and motor impedance, this generates repetitive overvoltage at the motor terminals, influencing the occurrence of partial discharges between conductors, causing degradation of the insulation of electric motors. Understanding the effects resulting from the frequency converter–electric motor interaction is essential for developing and implementing insulation systems with characteristics that support the most diverse applications, have an operating life under economically viable conditions, and promote energy efficiency. With this objective, a search was carried out in three recognized databases. Duplicate articles were eliminated, resulting in 1069 articles, which were systematically categorized and reviewed, resulting in 481 articles discussing the causes of degradation in the insulation of electric motors powered by frequency converters. A bibliographic portfolio was built and evaluated, with 230 articles that present results on the factors that can be used in estimating the life span of electric motor insulation. In this structure, the historical evolution of the collected information, the authors who conducted the most research on the theme, and the relevance of the knowledge presented in the works were considered.

Proposal of Linear Drive for Mechatronic Facility of Solar Panels

2013 ◽  
Vol 460 ◽  
pp. 57-64 ◽  
Author(s):  
Miroslav Rimár ◽  
Štefan Kuna ◽  
Ivan Čorný
Keyword(s):  
Feedback Control ◽  
Electric Drive ◽  
Radiation Intensity ◽  
Solar Panels ◽  
Drive Control

The paper deals with proposal of synthesis of drive control of solar panels facility. New way of facility control is presented. The facility serves for solar panels rotation according to sun radiation intensity, sun location, and feedback control of position of linear electric drive.

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