Науковий вісник НГУ

Statistical research of equivalent electric resistance of the heterogeneous current-carrying medium at its electroerosive processing on an example of granules of aluminum in water

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Electrical complexes and systems

Last Updated on 19 March 2014

Published on 26 February 2013

Hits: 4560

Authors:

S.M. Zakharchenko, Cand. Sci. (Tech.), Institute of Electrodynamics National Academy of Science of Ukraine, Senior Research Fellow of the Department of Electromagnetic Systems, Kyiv, Ukraine

Abstract:

Purpose. To carry out the statistical research of dependence of equivalent electric resistance of heterogeneous current-carrying mediums at them electroerosive processing from voltage of discharge pulses for the registration of a stochastic component of its change.

Methodology. On the labware with use of analogue-digital data storage oscillograph HAMEG HM 1507-3 we have carried out a series of experimental tests of dependences of equivalent electric resistance of granules Al submerged in tap water, and tests of voltage and current dependences of discharge pulses from reference voltage of the shaper. The data obtained was subject to statistical processing. Mathematical expectation, variance, parameter of variability and relative average deviation from expectation have been defined.

Findings. Dependences of the mathematical expectation, the variance, the parameter of variability and a relative average deviation from expectation of equivalent electric resistance of Al granules in tap water have been obtained at them electroerosive dispersion from reference voltage of the shaper. We have shown that the dependences of expectation and variance of equivalent resistance on voltage can be approximated by hyperbolic functions. The higher is the reference voltage the lower are their values. This testifies the increase of stability of process with increase of voltage of pulses in the investigated range. We have received following: maximum values of the parameter of variability by regulation of the reference voltage are observed for equivalent electric resistance of the medium, and minimum – for amplitude of voltage. This testifies that properties of resistance of the granulated current-carrying mediums naturally cause stochastic changes of the electrical parameters of the system.

Originality. For the first time the statistical characteristics of the equivalent electrical resistance of heterogeneous current-carrying mediums on an example of granules Al in tap water have been considered during electroerosive dispersion and the electrical parameters of discharge pulses have been studied.

Practical value. The offered approach allows raising efficiency of the analysis of instability of electric parameters in the system including the generator of discharge pulses and the volume electroerosive loading.

References:

1.   Электроэрозионная технология соединений и порошков металлов /У.А. Асанов, А.Д. Цой, А.А. Щерба, В.И. Казекин – Фрунзе: Илим, 1990. – 256 с.

Asanov, U.A., Tsoy, A.D., Shcherba, A.A. andKazekin, V.I. (1990), Elektroirozionnaya tekhnologiya soedineniyi poroshkov metallov [Electroerosive Technology of Compounds and Powders of Metals], Ilim, Frunze, Russia.

2.   Solomon, V.C., Smith, D.J., Tang, Y. and Berkowitz, A.E. (2004), “Microstructural characterization of Ni-Mn-Ga ferromagnetic shape memory alloy powders”, J. App. Phys., Vol.95 (11), pp. 6954–6956.

3.   Berkowitz, A.E., Hansen, M.F., Parker, F.T., Vecchio, K.S., Spada, F.E., Lavernia, E.J. and Rodriguez, R.(2003), “Amorphous soft magnetic particles produced by spark erosion”, J. Magn. Magn. Mater, no.1, pp. 254–255.

4.  Структура та властивості наночастинок, отриманих методом електроіскровоїобробки мідіта срібла /Лопатько К.Г., Афтанділянц Є.Г., Зауличний Я.В., Карпець М.В. // Матеріалознавство та обробка металів – 2009. – №3. – С. 57–62.

Lopatko K.G., Aftandilyants E.G., Zaulichniy Ya.V., Karpets M.V. (2009), “Structure and properties of nanoparticles, obtained by a method of electrospark processing of copper and silver”, Materialoznavstvo ta obrobka metaliv, no.3, pp. 57–62.

5.   Шидловский А.К. Перспективы применения искроэрозионной коагуляции в системах водоподготовки тепловых сетей /Шидловский А.К., Щерба А.А., Захарченко С.Н. // Энергетика и электрификация – 2002. – №12. – С. 34–40.

Shidlovskyi, A.K., Shcherba, A.A. and Zakharchenko, S.N. (2002), “Prospect of application spark-eroded coagulation in systems of water preparation of thermal networks”, Energetika i elektrifikatsiya, no.12, pp. 34–40.

6.   Дезинфицирующее действие объёмного электроискрового разряда в воде / [Гончарук В.В., Щерба А.А., Захарченко С.Н. и др.] // Химия и технология воды – 1999. – №3. – Т. 21. – С. 328–336.

Goncharuk, V.V, Shcherba, A.A., Zakharchenko, S.N., Savluk, O.S., Potapchenko, N.G. andKosinova, V.N. (1999), “Disinfectant action of the volume electrospark discharges in water”, Khimiya i tekhnologiya vody, Vol. 21, no.3, pp. 328–336.

7.   Захарченко С.Н. Моделирование сопротивления гранулированных токопроводящих сред параметрическими зависимостями / Захарченко С.Н., Шидловская Н.А.// Электронное моделирование – 2012. – Т.34. – №5. – С. 91–102.

Zakharchenko, S.N., Shydlovskaya, N.A. (2012), “Modeling of resistance of the granulated current-carrying medium by parametrical dependences”, Elektronnoe modelirovanie, Vol. 34, no.5, pp. 91–102.

8. Захарченко С.Н. Моделирование зависимости электрического сопротивления гранулированных токопроводящих сред от протекающего в них импульсного тока / Захарченко С.Н. // Технічна електродинаміка – 2012. – №5.– С. 17–27.

Zakharchenko, S.N. (2012), “Modeling of dependence of electrical resistance of granulated current-carrying mediums from a pulse current proceeding in them”, Tekhnichna electrodynamika, no.5, pp. 17–27.

9.   Щерба А.А. Регулирование динамических параметров технологических систем объёмной электроискровой обработки гетерогенных токопроводящих сред / Щерба А.А., Подольцев А.Д., Захарченко С.Н. // Праці Ін-ту електродинаміки НАНУ. Електротехніка 2001. – К.: Вид. Ін-ту електродинаміки НАНУ. – 2001. – С. 3–16.

Shcherba, A.A., Podoltsev, A.D. and Zakharchenko, S.N. (2001), “Regulation of dynamic parameters of technological systems of volume electrospark treatmen the terogeneous current-carrying mediums”, PratsiInstitutu Elektrodynamiki Natsionalnoi Akademii Nauk Ukrayini, Kyiv, pp. 3–16.

01_2013_zakhar
2014-03-19  519.47 KB  1383

• Next >