scholarly journals Energy Characteristics of Asynchronous Electric Drive

2019 ◽  
Vol 27 (1) ◽  
pp. 45-50
Author(s):  
Sergiej German-Galkin ◽  
Vladimir Sakharov ◽  
Dariusz Tarnapowicz
Keyword(s):  
Vector Control ◽  
Electric Drive ◽  
Mathematical Description ◽  
Energy Performance ◽  
Control Methods ◽  
Energy Characteristics ◽  
Electric Drives ◽  
Asynchronous Electric Drive ◽  
Drive Systems ◽  
Main Component

AbstractEnergy aspects are fundamental to the design of electric drive systems. This article describes energy performance for asynchronous electric drives based on various control methods. These electric drives comparison shows that vector control methods have a significant advantage over scalar control methods. The asynchronous electric drive mathematical description is based on vector control theory and main component method. Equations, obtained by mathematical description, allow calculating of the currents, voltages and electric power at the output when the electromagnetic torque and speed machine are set. Energy characteristics of the asynchronous drive were obtained with the use of the MATLAB-SIMULINK simulation program.

scholarly journals Study of spindle drives for boring machines

2019 ◽  
Vol 287 ◽  
pp. 01026 ◽  
Author(s):  
Marin Zhilevski ◽  
Mikho Mikhov
Keyword(s):  
Electric Drive ◽  
Machine Tools ◽  
Experimental Studies ◽  
Program Control ◽  
Electric Drives ◽  
Technological Processes ◽  
Boring Machines ◽  
Drive Systems

This paper examines the main requirements for the electric drive systems of a class of boring machines with digital program control. On this basis, a methodology for choice of the spindle drives is offered. The algorithm takes into account the specific features of the technological processes, the treated materials, the tools used and their wear, as well as the mechanical gear types. The experimental studies of the implemented electric drives for the spindle are presented and discussed. The research carried out and the results obtained can be used in the development of such drives for the studied class of machine tools.

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 An energy efficient electric drive of air units

2021 ◽  
pp. 18-25
Author(s):  
I.M. Kotsur ◽  
A.V. Hurazda ◽  
B.A. Dolia ◽  
L.E. Shestov
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Energy Performance ◽  
High Accuracy ◽  
Drive System ◽  
Rational Selection ◽  
Asynchronous Electric Drive ◽  
Electric Drive System ◽  
Aerodynamic Parameters ◽  
Selection Of

Purpose. Improving the efficiency and energy performance of an asynchronous electric drive for stationary fan’s units of the main ventilation line of mines. Methodology. The research was carried out using the methods of the theory of electrical circuits, mathematical physics, simulation, interpolation and approximation Findings. The research of electromagnetic and energy processes in the asynchronous electric drive system with pulse control at a fan load, taking into account the variable aerodynamic parameters of the main ventilation line of mines. An electric drive system is able to respond with high accuracy and reliability to changes in the aerodynamic parameters of the main ventilation line of mines has been proven. This will also increase the power factor of the electric drive at a fan load up 0.8 to 0.93 p.u., and the efficiency up 92.5% to 94.5%, when regulating in the range of the operating slip of the rotor of the drive fan motor = 0.5 ÷, which, respectively, is on average up 0,25% to 40 higher in comparison with systems of an unregulated electric drive. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive. Originality. The research of electro-mechanical, electro-energy power and aerodynamic processes in the dynamic modes of the fan electric drive was carried out. The fan-loaded "induction motor-converter" system has been proven to be self-regulating. It is able to respond with high accuracy and reliability even at low switching frequencies of the power chopper to any changes of the aerodynamic parameters of the main ventilation line of mines. Practical value. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive.

Energy-Saving Control Algorithms of Electrically Driven Aggregates of Gas Transportation Technological Installations

2021 ◽  
Vol 64 (4-5) ◽  
pp. 24-29
Author(s):  
Oleg Kryukov ◽  
◽  
Igor Gulyayev ◽  
Dmitriy Teplukhov ◽  
◽  
...  
Keyword(s):  
Electric Drive ◽  
Optimal Level ◽  
Control Algorithms ◽  
Experiment Planning ◽  
Technical Documentation ◽  
Electric Drives ◽  
Efficient Management ◽  
Natural Gas Transport ◽  
Drive Systems ◽  
Energy Saving Control

Optimal principles of energy efficient management of natural gas transport using electric drive units along gas pipelines based on the existing regulatory and technical documentation are considered. The methodologi-cal basis of the control principles is the apparatus of the theory of experiment planning and invariant systems using strategies of low-population technologies and intelligent electric drive systems. The scheme and modern technical means of frequency-controlled electric drives and algorithms for optimal control of the main techno-logical units of compressor stations of the main gas transportation are presented, which ensure the stabiliza-tion of the parameters of the pumped gas at the optimal level.

Sign in / Sign up

Export Citation Format

Share Document