ENERGY EFFICIENCY INVESTIGATION OF A DRY DOCK DEWATTERING PUMPS ADJUSTABLE ELECTRIC DRIVE ON PHYSICAL MODEL

2017 ◽  
Vol 25 (101) ◽  
pp. 177-192
Author(s):  
Paul E., Hristo ◽  
Keyword(s):  
Energy Efficiency ◽  
Physical Model ◽  
Electric Drive ◽  
Dry Dock

scholarly journals Modernization of a frequency-controlled asynchronous electric drive system

2019 ◽  
pp. 25-33
Author(s):  
I. V. Shestakov ◽  
N. R. Safin
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Asynchronous Motor ◽  
Operating Mode ◽  
Voltage Source ◽  
Sinusoidal Voltage ◽  
Pulse Width Modulated ◽  
Operating Modes ◽  
Asynchronous Electric Drive ◽  
Research Show

The paper introduces the results of mathematical simulation of the operating modes of an asynchronous motor when powered by a sinusoidal voltage source and a width-modulated voltage pulse source. The study shows the possibilities of increasing the energy efficiency of an asynchronous electric drive. Findings of research show the feasibility of studying the switching of the motor power source from a pulse width-modulated voltage to a sinusoidal voltage source in the nominal operating mode in order to increase the energy efficiency of the electric drive

The Traction Induction Motor Magnetic Circuit Saturation Influence on the Variable Electric Drive Energy Efficiency

2021 ◽  
Author(s):  
Oleksiy Iegorov ◽  
Olga Iegorova ◽  
Natalia Potryvaieva ◽  
Halyna Zaluzhna
Keyword(s):  
Energy Efficiency ◽  
Induction Motor ◽  
Electric Drive ◽  
Magnetic Circuit

scholarly journals Energy model of electric drive of centrifugal borehole pump

2019 ◽  
Vol 124 ◽  
pp. 02018
Author(s):  
A. Vodovozov ◽  
N. Chernyaeva ◽  
D.A. Zaripova ◽  
B.A. Zhakishev ◽  
D.K. Sarzhanov
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Operating Conditions ◽  
Final Decision ◽  
Technical Parameters ◽  
The Public ◽  
Borehole Pump ◽  
Public Data ◽  
Search And Selection ◽  
Local Water

A mathematical model of an electric drive of a centrifugal borehole pump is proposed for evaluating its energy consumption in operating conditions. The model is based on the use of minimum set of technical parameters of the pump, presented in the public data of the manufacturer. The correctness of the calculated formulas is confirmed by experimental data provided in the program for equipment search and selection from Grundfos Product Center. Based on the created model, a comparative analysis of the energy efficiency of products from various manufacturers was made. It is proved that when choosing a centrifugal borehole pump of the local water supply system, it is necessary to pay attention to the energy efficiency indicators of electric drive in order to make a final decision.

Energy Saving in Pilger Mill Electric Drives Complete Solution

2017 ◽  
Vol 8 (4) ◽  
pp. 1673 ◽  
Author(s):  
Yuriy Usynin ◽  
Dmitry Sychev ◽  
Nikita Savosteenko
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Electric Drive ◽  
Control Method ◽  
Economic Effect ◽  
High Energy ◽  
Variable Load ◽  
Electric Drives ◽  
Reluctance Machine ◽  
Drive Control

This paper considers issues related to increasing energy efficiency in electric drives of pilger rolling mills, presenting kinematics of such mills, provides justification for the general load chart, presents the detailed review of reference materials on technical energy saving solutions, and suggests a math model of an electric drive with a field regulated reluctance machine. The paper suggests key methods of saving energy in electric drives of pilger mills, namely: kinematic scheme improvement; main energy drainers and ways of energy loss reduction in electric drives with direct- and alternate-current motors, energy-saving electric drive control profiles. The article compares energy-saving resources in electric drives with various-type motors (direct-current motors, synchronous motors, and field regulated reluctance machine), clarifies the scheme of energy-saving resource implementation, provides the qualitative evaluation of electric drive control method efficiency. The accent is made on high energy efficiency of the proportionate control of armature and excitation circuits and across the range of torque in electric drives of abruptly-variable-load mills. The highest economic effect is reached in the electric drive with a field regulated reluctance machine – by means of implementing the energy-efficient electromechanical converter and applying energy-saving control profiles.

scholarly journals INFLUENCE OF FRICTION IN THE ARMORED FACE CONVEYOR CHAIN ON DYNAMICS AND ENERGY EFFICIENCY

2021 ◽  
pp. 15-20
Author(s):  
Alexander Osichev ◽  
Andrii Tkachenko
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Dimensional Space ◽  
Moving Load ◽  
Three Dimensional ◽  
Viscous Friction ◽  
Spatial Form ◽  
Time Dynamic ◽  
Resonance Frequencies ◽  
Dimensional Space Time

The range of values ​​of the coefficient of resistance to movement of the chain of typical longwall armored face conveyors and the coefficient of inner viscous friction in the chain, both immersed in the moving load and during the idle run of the conveyor, is estimated. The computer model of the conveyor is built as a multi-mass elastic-viscous stretched closed chain without sag with the number of masses n = 200 and one induction drive motor located in the head of the conveyor. Using the constructed model, three-dimensional space-time dynamic characteristics of speeds and forces in the chain of the CP72 longwall armored face conveyor are obtained. Start up to rated speed v≈1 m / s and the working process is simulated with an unloaded conveyor. The spatial form of frictional self-oscillations in the model with distributed parameters is shown. The resonance frequencies and amplitudes of oscillations of the efforts in the circuit and the length of the corresponding spatial waves have been determined. It was found that at the first and second resonance frequencies, self-oscillations are not excited, since the damping effect of the electric drive is quite pronounced in this frequency band. The direct connection of vibration amplitudes with the energy efficiency of the conveyor electric drive is indicated.

scholarly journals FEATURES OF IMPROVING ASYNCHRONOUS ENGINES IN THE CONTEXT OF TRAINING FUTURE TEACHERS OF TECHNOLOGY

2020 ◽  
pp. 93-104
Author(s):  
Mykola Kurach ◽  
Oleksandr Yemets
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Economic Effect ◽  
Constant Current ◽  
Stator Winding ◽  
Case Method ◽  
Future Teachers ◽  
Current Frequency ◽  
Noise Characteristics ◽  
Research Activities

The article covers issues related to the ways of improvement an asynchronous engine. The features of modernization of asynchronous motors aimed at increasing their energy efficiency are considered. The reasons for the low average load of this engine in the electric drive, especially the traditional and the newest approaches to the calculation of such engines, are analyzed. A new method of executing a stator winding (combined windings) of an electric motor, which has a significant economic effect, is characterized. It is noted that this method of performing the stator winding provides: the ability to adjust the speed at a constant current frequency by gradually changing the voltage throughout the speed range; soft and stable mechanical characteristics; consumption of smaller starting currents and increase of a twisting moment; improvement of vibration and noise characteristics. The importance and peculiarities of studying the methods of increasing the energy efficiency of asynchronous engines by future teachers is substantiated. In this context, the study of improving the efficiency of electrical installations, in particular induction motors, is important in the formation of professional competencies of teachers related to the ability to analyze and evaluate objects of the technological environment and the ability to organize research activities of students in the process of working on educational projects. . The main methods of forming these competencies are the method of specific situations (case method), as well as the method of algorithm for solving inventive problems. Key words: asynchronous engine, energy efficiency, technological processes, electric drive, combined windings, future teachers of technology, the method of specific situations (case method), the method of algorithm for solving inventive problems (the Innovation Algorithm).

scholarly journals Developing simulation models for precise adjustment and debugging of ship frequency inverters

2020 ◽  
Vol 2020 (4) ◽  
pp. 95-104
Author(s):  
Sergey Grigoryevich Cherniy ◽  
Aleksandr Sergeevich Sobolev ◽  
Pavel Andreevich Erofeev
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Frequency Control ◽  
Frequency Converter ◽  
Operating Mode ◽  
Compressed Air ◽  
Load Factor ◽  
Stable Operation ◽  
Compressor Unit ◽  
Advantages And Disadvantages

The paper describes a variable frequency drive which consists of two elements: an electric drive (synchronous or asynchronous electric drives, that is, drives powered by alternating current are used in capacity of it), and a frequency converter able to control the amplitude and frequency of the voltage supplied to the drive. It becomes possible to control the speed of rotation of the electric motor and the torque on its shaft. The most optimal energy efficiency when using compressor units is achieved under the operating mode when its average daily load factor makes at least 85%. Under the mentioned operating mode fluctuations during the compressed air consumption will be minimal, and the most stable operation of the compressor at its rated nominal power is ensured. In practice, no more than 15% of all the industrial compressors are operated in such operating mode. For 85% of the compressor units the question of improving energy efficiency by regulating its capacity remains open. The method of capacity regulation by using a frequency converter is currently the most optimal and perfect, because adjusting the parameters of the electric drive in this way, the most accurate regulation of the compressed air pressure is provided, which allows reducing the energy consumption in the compressed air injection process, as well as extending the service life of the equipment used. There has been considered a device with frequency control of a compressor unit, debugging of which was carried out on the basis of a mathematical model, which allows choosing the most optimal parameters for frequency control of an electric drive of a compressor unit in order to increase energy efficiency. The analysis of all the advantages and disadvantages of frequency regulation is being carried out, as well as a comparative analysis for selecting the optimal frequency converter in terms of the import substitution

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