Abstracts
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| Дата: | 2007 |
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| Формат: | Стаття |
| Мова: | English |
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Інститут технічних проблем магнетизму НАН України
2007
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| Назва видання: | Електротехніка і електромеханіка |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/142837 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Abstracts // Електротехніка і електромеханіка. — 2007. — № 1. — С. 80-81. — англ. |
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irk-123456789-1428372018-10-17T01:23:32Z Abstracts 2007 Article Abstracts // Електротехніка і електромеханіка. — 2007. — № 1. — С. 80-81. — англ. 2074-272X http://dspace.nbuv.gov.ua/handle/123456789/142837 en Електротехніка і електромеханіка Інститут технічних проблем магнетизму НАН України |
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Abstracts |
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Abstracts Електротехніка і електромеханіка |
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Abstracts |
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Abstracts |
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Abstracts |
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Abstracts |
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abstracts |
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Інститут технічних проблем магнетизму НАН України |
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2007 |
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http://dspace.nbuv.gov.ua/handle/123456789/142837 |
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Abstracts // Електротехніка і електромеханіка. — 2007. — № 1. — С. 80-81. — англ. |
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Електротехніка і електромеханіка |
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2025-07-10T15:52:02Z |
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2025-07-10T15:52:02Z |
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1837275781539037184 |
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80 Електротехніка і Електромеханіка. 2007. №1
Abstracts
Electrical Mashines and Apparatus
Burkovsky A.N., Rybalko O.A. 5
Determination of load dependence of al-
lowed number of reverses for an asynchronous
motor with a short-circuited rotor in S7 mode.
The paper contains results of determination of
allowed number of reverses for an asynchronous
motor with a short-circuited rotor in S7 mode as
function of load.
Key words – asynchronous motor, mode,
reverse, determination.
Golenkov G.M., Bondar R.P., Makogon S.A.,
Podoltsev A.D., Bogaenko N.V., Popkov V.S. 8
Numerical calculation of magnetic field
and basic characteristics of an electrovibrator
based on a coaxial linear motor with permanent
magnets.
The design of an electrovibrator created on
the basis of a coaxial linear motor with permanent
magnets is considered. FEM analysis of magnetic
field and electromagnetic force acting on the motor
armature is carried out. Experimental data that
confirm reliability of calculation results obtained
are given.
Key words – electrovibrator, coaxial linear
motor, magnetizing force, permanent magnets.
Gurevich V.I. 13
A simple ultraspeed overcurrent protection
relay.
Specification and results of experimental re-
search on a high-speed hybrid overcurrent relay
with a reed switch as the sensitive element are
given. It is shown that this relay can be success-
fully used for acceleration of the basic relay pro-
tection action.
Key words – microprocessor relay, protec-
tive relays, high-speed relay, CT saturation,
current derivatives, reed relay.
Degtev V.G., Babushanov A.V., Lavruk I.S.,
Samoilov G.A. 17
Synthesis of a three-phase winding family
Peculiarities of arbitrary symmetric three-
phase windings with similar harmonic spectrums
are studied. A technique of the windings’ homolo-
gous series generation is worked out. Examples of
the technique application are given. It is suggested
to use a feasibility of homologous series genera-
tion so as to synthesize a generalized structure of
multiphase windings.
Key words – three-phase winding, har-
monic spectrum, homologous series, generalized
model.
Zabolotny I.P., Grishanov S.A. 21
A dynamic state control method for a syn-
chronous generator with application of phase
rotor trajectories.
In the paper, a transient state control method
for a synchronous generator is introduced. The
method is based on application of phase trajecto-
ries of the rotor motion. The capabilities of the
control method have been investigated on an ele-
mentary power system model. Results obtained
confirm efficiency of the method as compared with
methods based on Lyapunov functions or those
based on the theory of pattern recognition.
Key words – synchronous generator, con-
trol method, transient state, phase rotor trajec-
tories.
Zagirniak M.V., Zagirnyak V.G., Nevzlin B.I.,
Kirichkov A.V. 25
Induction motor temperature defence char-
acteristics under rapidly increasing overloads.
A refined thermal equivalent circuit of an in-
duction motor used to develop a thermal circuit of
a unit, namely, an element of the stator winding
outhang - thermodetector, is considered. Errors of
determining the stator winding temperature at
slowly and rapidly increasing temperatures have
been revealed on the basis of the analysis of the
isolated unit.
Key words – induction motor; refined
thermal equivalent circuit; windings; stator;
thermodetector; increasing temperature.
Klymenko B.V., Baida E.I., Grechko A.M.,
Boev S.V. 30
About fault current thermal action in vac-
uum-breaker protected middle-voltage circuits.
A mathematical model is developed to obtain
relationship between the breaker response and current
distributor thermal stability in short-circuit condi-
tions. Optimal total time of the breaker opening is
calculated for the minimum value of Joule integral.
Key words – Joule integral, symmetric
three-phase fault, total interruption time, vac-
uum circuit-breaker, dependence.
Sebko V.V. 34
Monitoring of four parameters of ferro-
magnetic products at one frequency of probing
longitudinal magnetic field of a transformer
eddy-current probe.
An eddy-current method of contactless joint
determination of geometric, magnetic, electric pa-
rameters and temperatures of a cylindrical ferro-
magnetic product is considered. The whole re-
search has been carried out only at one frequency
of probing longitudinal magnetic field which cor-
responds to the maximum phase angle of the total
EMF of a transformer eddy-current probe taking
into account the product heating.
Key words – cylindrical ferromagnetic
product, parameters, contactless determination,
eddy-current method.
Tchaban A. 37
An A-model of a turbogenerator in phase
current coordinates.
A mathematical model of a turbogenerator is
developed in phase coordinates of currents. Differ-
ential equations of the electromechanical system
state are given in normal Cauchy form. Utilization
Електротехніка і Електромеханіка. 2007. №1 79
of the phase coordinates allows taking into account
any type of the stator unsymmetry.
Key words – turbogenerator, mathematical
model, phase coordinates, normal Cauchy form.
Chepelyuk A.A. 42
Monte-Carlo calculation of scattering con-
ductivity in a two-leg valve-type electromagnet.
Monte-Carlo calculations of geometric scat-
tering conductivity in a "two cylinders - one plane"
system have resulted in obtaining a conductivity
dependence as function of multiplicity of the stud-
ied system dimensions.
Key words – electromagnet, conductivity,
pole, potential.
Sharaban Yu.V. 45
Ways of improvement of starting charac-
teristics of aviation asynchronous motors.
Advantages and short-comings of ways of
improving starting characteristics of asynchronous
motors intended for aviation accessory drive are
analyzed.
Key words – asynchronous motor, starting
characteristics, magnetic wedges, double-cage
rotor.
Electrical Engineering: Theory
Boev V.M., Rogachev S.I. 49
Superconductivity in terms of Faraday
concept of “electrotonic state”.
Process of magnetic field penetration into
type I and type II superconductors is analyzed us-
ing Faraday concept of "electrotonic state" (vector
potential).
Key words – superconductivity, magnetic
field, vector potential, electrotonic state, Fara-
day conception.
Kanov L.N., Kostjukov V.V. 53
A method of nonsteady electrical system state
modeling based on the systems’ circuit factors.
An efficient numerical-and-analytical method
of modeling nonsteady and transient states of elec-
trical systems is introduced. The method is based
on circuit factors and applicable to analyzing both
linear and nonlinear systems. A technique of cir-
cuit factors calculation is described. An example of
the method application is given.
Key words – numerical-and-analytical
method, electrical system, circuit factors, linear
and nonlinear systems, calculation technique.
High Electrical and Magnetic Field Engineering
Baranov M.I. 56
A 1D electrothermal problem for metallic
skin of an aircraft under lightning action.
Results of approximate calculations of tem-
perature increase in the zone of the high-current
spark channel of a lightning lock-in on the flat
surface of the metallic skin of an aircraft are given.
It is shown that a pulse 2/50 mks 200кA-amplitude
component of the lightning total current causes
only local burn of the external surface of the air-
craft aluminum skin, while its constant 1000ms
200А-amplitude component can result in the skin
through fusion penetration.
Key words – lightning, high-current spark
channel, temperature, aircraft skin.
Besprozvannykh A.V. 62
Analysis of a switching matrix under re-
covery of partial capacitance and dielectric loss
tangent of multicore cables via cumulative
measurements.
At application of a method of cumulative
measurements, partial capacitance and dielectric
loss tangent are found as solution of a system of
linear algebraic equations. With examination of
multicore cables, the number of experiments rises
sharply. To reduce environment action on results
of measurements and speed of experiment, it is
enough to analyze a switching matrix that provides
solving the system.
Key words – cumulative measurements,
partial capacitance, dielectric loss tangent,
switching matrix, determinant, optimum plans.
Dubovenko K.V. 67
A calculation method for breakdown prob-
ability characteristics in gaseous insulation of
submegavolt range high-voltage apparatus
Taking into account a set of initial electron
generation mechanisms, applicability of a numeri-
cal method for breakdown probability characteris-
tics calculation is widened for high-voltage appara-
tus gaseous insulation with high values of electric
field strength (>5 MV⋅m-1). The characteristics of
gaseous insulation in real compact designs of a
low-inductance high-voltage gaseous switch and a
submegavolt pulse voltage generator have been
calculated with the method.
Key words – high-voltage apparatus, gase-
ous insulation, breakdown probability charac-
teristics, calculation method.
Petkov A.A. 73
Formalization of structure description for
high-voltage pulse test device discharge circuits.
The paper introduces techniques of formaliza-
tion of high-voltage pulse test device description.
The techniques provide structural synthesis of the
device discharge circuits. A formal description of
various test devices is presented.
Key words – discharge circuit, structural
synthesis, high-voltage pulse test device, formal
description.
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