Donbas State Technical University

Lysychansk, Ukraine

Donbas State Technical University

Lysychansk, Ukraine
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Filatiev M.V.,Donbas State Technical University
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu | Year: 2017

Purpose. The aim is to define the mathematical equation of coordinates of distinguished points of ground depression depending on the depth of broken workings based upon experimental data. Methodology. The work consists of theoretical and experimental chapters. In the theoretical chapter, depending on equation in use, principled approaches to defining distinguished points of ground depression are described. In the second chapter the position of distinguished points of ground depression as to the working face are determined based upon the observations; their statistical analysis is provided. Findings. The usage of exponential, logistic or tangent hyperbolic relation provides almost equal staging of ground depression process by its driving rate. Methods for processing experimental data for mathematical descriptions of these processes have been improved. Hypothesis for the influence of ground depression from the depth of broken workings on basin parameters was confirmed. Originality. Horizontal coordinate of distinguished points of ground depression depends on depth of broken workings in direct proportion. Practical value. Relations obtained considerably simplify engineering analysis while elaborating activities for sustainable protection of surface objects. © Filatiev M. V., 2017.

Filatiev M.V.,Donbas State Technical University
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu | Year: 2017

Purpose. To set the correlation ratio between the parameters of underworked rocks and earth surface displacement. Methodology. The techniques in use stipulate the selection of analytical relations to describe the curve of the ground depression. Characteristic stages of the ground depression and the corresponding parameters of displacement of underworked rocks are determined on the basis of these analytical relations. Using the results of known experimental observations linear and angular parameters are defined to characterize the ground depression and displacement of underworked rocks. Statistical analysis of the obtained data is carried out. Findings. The crowd conditions of cross-correlation connections are set between the angular and linear parameters of settling of the earth surface and moving of the earned additionally breeds. By basic influence defining the coordinates of characteristic points of settling of the earth surface is a depth of conduct of stopping. Constancy of angular parameters is set for the considered depths in an interval of 106 / 1195 m. Originality. The formation of the upper boundary of rock displacement with a break of their continuity under the influence of the active phase of ground depression is established and confirmed by the results of statistical analysis for the first time. Practical value. The obtained results allow predicting the stage of ground depression and the corresponding parameters of the displacement of underworked rocks. © Filatiev M. V., 2017.

Afanasyev O.M.,Donbas State Technical University | Shcherba A.A.,NASU Institute of Electrodynamics
2013 IEEE 33rd International Scientific Conference Electronics and Nanotechnology, ELNANO 2013 - Conference Proceedings | Year: 2013

The analytical method for evaluation of switched-mode converters energy efficiency depending on storage inductor current modes using experimental values of IGBT-modules parameters from datasheets is proposed. © 2013 IEEE.

Dyachenko I.V.,Taras Shevchenko National University | Ramazanova E.Y.,Donbas State Technical University | Dyachenko V.D.,Taras Shevchenko National University
Russian Journal of Organic Chemistry | Year: 2014

Michael reaction of dimethyl (furan-2-ylmethylidene)malonate with 2-cyanoethanethio(seleno)amides and 4-methylmorpholine afforded 4-methylmorpholinium 6-amino-3,5-dicyano-4-(furan-2-yl)pyridine-2-thio(seleno)lates via exchange of the CH acid components. Aryl(hetaryl)methylidenemalononitriles reacted with cyanoethanethioamide under analogous conditions to give 3-aryl(hetaryl)-2-cyanoprop-2-enethioamides which were converted into 3-aryl(hetaryl)-2-(1,3-thiazol-2-yl)prop-2-enenitriles according to Hantzsch. © 2014 Pleiades Publishing, Ltd.

Zablodskiy N.,Donbas State Technical University | Pliugin V.,Kharkiv Polytechnic Institute
Proceedings - 2015 16th International Conference on Computational Problems of Electrical Engineering, CPEE 2015 | Year: 2015

In this paper Ansys Maxwell calculation result of 3D magnetic field in a double-stator screw induction motor with hollow outer ferromagnetic rotor is given. © 2015 Lviv Polytechnic National University.

Paerand Y.,Donbas State Technical University | Bondarenko O.,Donbas State Technical University | Bondarenko I.,Donbas State Technical University

Micro resistance welding is effective way to reliably join small-scale parts in electronics industry and instrument-making. High quality welded joints are obtained by accurate regulation of welding current with transistor converter module which is one of the most important sub-systems in micro resistance welding machine. Multicell-type transistor converter with combined control, represented in the paper, provides high accuracy of current regulation and high energy efficiency therefore is proposed for use in micro resistance welding.

Dotsenko O.,Donbas State Technical University
Annual Scientific-Technical Colletion - Mining of Mineral Deposits 2013 | Year: 2013

The article gives the results of approximate the experimental data on worn row ground pressure variation in time by modified form logistic correlation of Pearl-Reed and was obtained correlation describing the process of rock pressure increasing in the mined-out area in the development at the depth of 240 meters. © 2013 Taylor & Francis Group.

Paerand Y.E.,Donbas State Technical University | Bondarenko O.F.,Donbas State Technical University | Bondarenko I.V.,Donbas State Technical University
2011 7th International Conference-Workshop Compatibility and Power Electronics, CPE 2011 - Conference Proceedings | Year: 2011

Micro resistance welding is effective way to reliably join small-scale parts in electronics industry and instrument-making. High quality welded joints are obtained by accurate regulation of welding current with transistor converter module which is one of the most important sub-systems in micro resistance welding machine. Multicell-type transistor converter with combined control, represented in the paper, provides high accuracy of current regulation and high energy efficiency therefore is proposed for use in micro resistance welding. © 2011 IEEE.

Kucherenko D.,Donbas State Technical University | Safronov P.,Donbas State Technical University
2014 IEEE International Conference on Intelligent Energy and Power Systems, IEPS 2014 - Conference Proceedings | Year: 2014

In this work the synchronous detection and the indirect current-control methods are investigated for determining the reference compensating currents of the shunt active power filter under balanced, unbalanced and distorted source voltage conditions. The three-phase power system with a diode rectifier is simulated. The simulation results are used for comparison. © 2014 IEEE.

Bondarenko O.F.,Donbas State Technical University | Bondarenko I.V.,Donbas State Technical University | Safronov P.S.,Donbas State Technical University | Sydorets V.M.,Paton Electrical Welding Institute of NAS of Ukraine
International Conference-Workshop Compatibility in Power Electronics , CPE | Year: 2013

Micro resistance welding is effective way to reliably join small-scale parts in electronics industry and instrument-making. High quality welded joints are obtained by coordinating welding current and electrodes squeezing force profiles. The decisions for minimizing inertia of welding machine units proposed in the paper allow achieving accurate coordinated control of current and force profiles. © 2013 IEEE.