Abstracts
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| Datum: | 2008 |
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Інститут технічних проблем магнетизму НАН України
2008
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| Schriftenreihe: | Електротехніка і електромеханіка |
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| Zitieren: | Abstracts // Електротехніка і електромеханіка. — 2008. — № 4. — С. 82-83. — англ. |
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irk-123456789-1430742018-10-24T01:23:21Z Abstracts 2008 Article Abstracts // Електротехніка і електромеханіка. — 2008. — № 4. — С. 82-83. — англ. 2074-272X http://dspace.nbuv.gov.ua/handle/123456789/143074 en Електротехніка і електромеханіка Інститут технічних проблем магнетизму НАН України |
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Abstracts Електротехніка і електромеханіка |
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Інститут технічних проблем магнетизму НАН України |
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Abstracts // Електротехніка і електромеханіка. — 2008. — № 4. — С. 82-83. — англ. |
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Електротехніка і електромеханіка |
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2025-07-10T16:22:40Z |
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82 Електротехніка і Електромеханіка. 2008. №4
Abstracts
ELECTROENGEENIRING: Prominent events and great names
Baranov M.I. 5
Radio electronics: short history of its for-
mation as the thematic applied-physics field of
both electricity and scientific-and-technological
advance of the humanity.
The paper presents a brief review of the basic
achievements of the humanity in the field of gen-
eration, transmission, reception and amplification
of high-frequency electromagnetic vibrations in
micrometer–meter ranges of wavelengths related
to such an advanced branch of science and tech-
nology as radio electronics.
Key words – radio electronics, high-
frequency electromagnetic vibrations, radio
wave, generation, transmission, reception, am-
plification.
Electrical Mashines and Apparatus
Hawryljuk R. 13
Charts of symmetric three-phase two-layer
windings with switching of the number of ports
in the ratio of 1 to 2 (number of slots z = 48).
All variants of symmetric three-phase two-
layer windings charts in asynchronous electric
motors that are feasible with the relation of the
number of ports of 1:2 and the number of slots z =
48 are described. 112 different charts are found,
each of them better than others according to at
least one of 12 criteria.
Key words – two-speed (1:2) charts of wind-
ings, electric machines, number of slots 48.
Gaponenko G., Kobozev A., Omelchenko V. 19
Rise in reliability of 0.4-kv mains protec-
tion by circuit breakers with microprocessor-
based trip units owing to increase in protection
amount, rise of sensitivity to remote short cir-
cuits and realization of remote power system
redundancy mode.
A possibility of sufficient increase in protec-
tion reliability for air and cable electric 0.4-kV
mains through replacement of analog electronic
trip units by microprocessor-based ones in circuit
breakers is studied. The microprocessor-based
electronic trip units provide greater amount and
higher quality of protection. Extensive research
and analysis of processes in electric lines resulted
in significantly increasing sensitivity of protection
to remote short circuit currents and a probability of
a no-failure protection through implementation of
remote power system redundancy mode.
Key words – reliability, protection, circuit
breaker, sensitivity, remote short circuit, re-
dundancy.
Kanov L.N. 24
Determination of phase voltage distortions
in a synchronous generator under pulse excita-
tion by means of circuital modeling.
A circuital-modeling-based calculation tech-
nique for a phase voltage unsinusoidality factor in
a synchronous pulse-excited generator is intro-
duced. An example of phase voltage distortion
analysis under the generator excitation by square-
wave pulses is given. A possibility of wavelet
analysis application to phase voltage shape studies
is shown.
Keywords – synchronous generator, phase
voltage distortion, circuital model, pulse excita-
tion, wavelet analysis.
Klimenko B.V., Kokhanovskiy V.O. 28
Features of electrical erosion of relay contacts
made of silver with oxide additions.
Results of research on electrical erosion of
contacts in dc chains as function of current
strength and number of commutations are pre-
sented. Influence of composition material ingredi-
ents on mass transfer behavior is specified, inver-
sion zones of the electrical erosion revealed.
Key words – electrical erosion, electrical con-
tacts, composition material.
Knyazyev V.V., Safnyuk G.Y. 30
Estimation of certification result uncer-
tainty for a surge generator.
The structure of a setting is briefly consid-
ered, a chart of a generator certification is given. A
model measurement equation which is a necessary
condition of budgeting uncertainties is presented.
A certification result uncertainty estimation tech-
nique is realized.
Key words – generator, certification, elec-
tromagnetic compatibility, uncertainty.
Kuznetsov B. I., Vasilets T.E., Varfolomeev A.A. 34
Nonlinear dynamic object neuro-control
using a generalized predictive control method.
In the given paper, utilizing a predictive
neuro-controller for providing high performance
characteristics of a nonlinear dynamic object con-
trol system is proposed. For the controller design,
efficient implementation of generalized predictive
control is applied by utilizing a multi-layer feed-
forward neural network as a nonlinear model of the
control object. A chart of the control system is
developed, the controller synthesis and the system
modeling made.
Key words – predictive neuro-controller,
neuro-system, multilayer feedforward neural
network.
Nevzlin B.I., Zagirnyak M.V., Zagirnyak V.E. 42
Refinement of medium-power induction
motors efficiency value.
Dependence of efficiency on slip has been re-
fined for medium-power induction motors.
Key words – induction motor, efficiency co-
efficient, equivalent circuit.
Nizhevskiy I.V., .Nizhevskiy V.I. 44
Electric descriptions of two-level equipo-
tential grounding device made from single cir-
cular electrodes.
An analytical estimation method is introduced
Електротехніка і Електромеханіка. 2008. №4 83
for electric parameters of a two-level structure of a
grounding device made from circular electrodes.
The novelty of the method consists in allowance
for arbitrary location of two circular grounding
devices in the ground with respect to each other.
Results obtained allow correct choice of geometri-
cal sizes of a two-level grounding device made
from circular electrodes for desired initial condi-
tions at planning or modernization of such ground-
ing devices with the purpose of providing standard
requirements.
Key words – calculation method, electric
descriptions, two-level equipotential grounding
device.
Soskov A.G., Rak N.О. 48
Analysis of current distribution between
the main contacts and a shunt circuit with a
semiconductor switch under current interrup-
tion by a hybrid contactor.
Analysis of current transition from the main
contact circuit to a shunt circuit with a semicon-
ductor switch has been performed. The analysis
has been made with allowance for the influence
that voltage drop both on a liquid metallic bridge
and on the "short" arc has on this process. A
physical model explaining an accidental process of
frequent current transition from the main contact
circuit to the shunt circuit under interruption of the
circuit has been introduced.
Key words – semiconductor switch, shunt
circuit, current transition, metal walkway.
Tereshin V.N., Bogdanova L.E. 53
About one direction of stability increase of
automatic switch overload current setting.
Influence of automatic switch calibration cur-
rent values on overload current setting stability is
investigated. A current-free calibration method that
allows increasing stability of the overload current
setting is developed.
Key words – overload current setting stabil-
ity, current-free calibration method, automatic
switch.
Shayda V.P., Dubinina O.N. 57
Regression analysis of a DC motor no-load
characteristic.
Polynomial theoretical dependence of a DC
motor no-load characteristic is obtained and esti-
mated with statistical methods.
Key words – direct current motor, no-load
characteristic, regression analysis.
Electrical Engineering: Theory
Baranov M.I. 60
Physical limitation of applicability of a
weakly-dispersed free electron model to a me-
tallic conductor with a conduction current.
The paper presents computational results con-
cerning estimation of the condition that limits ap-
plication of a model of drift free electrons weakly
dispersed by lattice ions to a round thin cylindrical
metallic conductor with an axial conduction cur-
rent of different amplitude-time parameters.
Key words – metallic conductor, conduction
current, de Broglie half-waves, lattice ions, dis-
persion of free electrons.
High Electrical and Magnetic Field Engineering
Batygin Yu. V., Vorobyov D.O. 63
Magnetic field of a single-turn inductor
with a conical internal hole.
A theoretical analysis of magnetic-field exci-
tation processes in a conical internal hole of a sin-
gle-turn inductor is conducted. Simple formulas
for the magnetic-field vector components are ob-
tained. The obtained formulas are shown to satisfy
exact solutions of Maxwell equations and bound-
ary conditions of the electrodynamic problem.
Key words – magnetic field, conical internal
hole, single-turn inductor electrodynamical.
Zolotaryov V.V., Karpushenko V.P., Zolo-
taryov V.M., Naumenko A.A. 65
Distribution of stationary electrical field in
a cylindrical non-ideal dielectric material.
An analytical method of harmonic electrical
field strength calculation for a set of cylindrical
electrodes between which a multi-layer piecewise
homogenous non-ideal dielectric material is placed
is proposed.
Key words – electrical field strength distri-
bution, cylindrical electrodes, harmonic electri-
cal field, non-ideal dielectric material.
Kravchenko V.I., Kniazev V.V., Lesnoi I.P.,
Nemchenko Yu.S., Guirka Yu.N. 70
Experimental research on output charachter-
istics of standard of electromagnetic field.
A "Basic reference standard for maximum in-
tensity units of pulse electric, volt per metre (V/m),
and magnetic, ampere per metre (A/m), fields" is
worked out and constructed with a nanosecond
intensity rise time for an electromagnetic field with
the magnitude reaching hundreds of kV/m and
hundreds of A/m.
Key words – basic reference standard,
maximum intensity units, electromagnetic field.
Kravchenko Yu.V., Naboka B.G., Ruda-
kov V.V., Antonets Yu.A., Zolotaryov V.M., Kar-
pushenko V.P. 75
A resonance testing stand for short high-
voltage cable lengths.
A resonance circuit for testing short samples
of high-voltage cables is implemented by means of
connecting an additional capacitor in parallel to a
cable piece to be tested. Calculations and design of
the additional capacitor made on the basis of a
composite paper-film dielectric are given.
Key words – short high-voltage cable, reso-
nance testing stand, composite paper-film di-
electric capacitor.
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