Abstracts
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| Дата: | 2006 |
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| Формат: | Стаття |
| Мова: | English |
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Інститут технічних проблем магнетизму НАН України
2006
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| Назва видання: | Електротехніка і електромеханіка |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/142726 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Abstracts // Електротехніка і електромеханіка. — 2006. — № 3. — С. 92-93. — англ. |
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irk-123456789-1427262018-10-15T01:23:12Z Abstracts 2006 Article Abstracts // Електротехніка і електромеханіка. — 2006. — № 3. — С. 92-93. — англ. 2074-272X http://dspace.nbuv.gov.ua/handle/123456789/142726 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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2006 |
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http://dspace.nbuv.gov.ua/handle/123456789/142726 |
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Abstracts // Електротехніка і електромеханіка. — 2006. — № 3. — С. 92-93. — англ. |
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Електротехніка і електромеханіка |
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2025-07-10T15:37:20Z |
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2025-07-10T15:37:20Z |
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1837274856773648384 |
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92 Електротехніка і Електромеханіка. 2006. №3
Abstracts
ELECTROENGEENIRING: Prominent events and great names
Baranov M.I. 5
E.C. Lenz as one of the founders of elec-
tromagnetic theory
A brief historical essay on scientific activity
of the outstanding Russian physicist E.C. Lenz,
who contributed greatly to development of theory
of electromagnetic phenomena, is presented.
Key words – history, essay, scientific activ-
ity, contribution, electromagnetic theory.
Electrical Mashines and Apparatus
Chuvashev V.A., Varenyk Ye.A., Papazov Yu.N.,
Chuvankov V.Yu., Zheleznyakov A.V.,
Olenchenko A.V., Muhametshin N.A. 12
Advanced research of the impact of rotor
bars anisotropic conductivity on starting torque of
an induction motor with a die-cast copper cage
The paper deals with an optimal design of an
induction motor with a die-cast copper cage rotor
characterized by an anisotropic layer in the upper
part of the rotor bars. 1D FEM optimization of an
explosion-proof induction motor with a die-cast
copper rotor with overall parameters of a commer-
cial induction motor with a die-cast aluminum ro-
tor (180 kW, 1140 V, 1500 rpm) is made with the
help of numeric computations. In the paper, the
design features and experimental results are given.
It is shown that induction motors with a special
“starting” layer placed in the upper part the die-
cast copper rotor bar have maximum value of start-
ing torque for relative conductivity factors ranging
from 0.3 to 0.5. The basic performance data ob-
tained in both bench and service tests of a proto-
type 210kW induction motor are in close agree-
ment with analytical data.
Key words – induction motor, die-cast ro-
tor, copper bars, conductivity, anisotropy, op-
timization, FEM.
Burkovsky A.N., Rybalko O.A. 15
Methodic problems of permissible reversal
number determination for an induction motors
with short-circuited rotor in S7 modes.
The article substantiates, with experimental
data, a method of power loss calculation in the
windings of an induction motor with a short-
circuited rotor in transient modes and presents a
technique for determining permissible reversal
number in S7 modes.
Key words – induction motor, short-
circuited rotor, power loss, reversal number,
calculation.
Gurevich V. 18
Microprocessor protection relays: new
prospects or new problems?
The internal architecture and principles of op-
eration of microprocessor-based devices including
so-called "microprocessor protective relays" have
little in common with devices called “electric re-
lays”. But microprocessor-based relay protection
devices are gradually driving out the traditional
electromechanical and even electronic relay pro-
tection of virtually from all fields of power and
electrical engineering. Advantages of microproces-
sor-based protection means over traditional ones
are far from being absolute or obvious, yet this is a
general trend. In reality, however, microprocessor-
based protection means have several specific
drawbacks too. In this paper, some of these prob-
lems are discussed.
Key words – microprocessor-based relay,
protection device, advantages, drawbacks.
Pavlenko T.P. 27
Characteristic factors for particle emission
from contact surface.
The paper analyzes factors concerning feasi-
ble movement of voltaic arc on the contact surface.
Assumptions based on quantum-mechanical solid-
state theory, thermal electron emission and diffu-
sion phenomena are given.
Key words – particle emission, voltaic arc
movement, contact surface, assumptions.
Pelevin D.E. 32
Optimization of magnetic field control elec-
tromagnet parameters.
Criteria for magnetic field control electro-
magnet optimization over weight and power con-
sumption for a given maximum overall dimension
are specified. A calculation procedure for cupped
electromagnets that may be applied in engineering
calculation techniques is introduced.
Key words – field control electromagnet,
criteria, optimization, calculation procedure.
Sereda A.G., Fetyuhina E.V. 35
Computations of polarized magnetic circuit
of an output relay for a circuit-breaker semi-
conductor release
A feasibility of polarized magnetic systems
application in designs of a semiconductor release
output relay for small-size VA-series current-
limiting circuit-breakers is considered.
Key words – output relay, current-limiting
circuit-breaker, polarized magnetic circuit,
computations.
Shumilov YU. A. Chebanyuk V. K. 39
Experimental and analytical investigations
of high-harmonics magnetic field of a cage in-
duction motor
Results of experimental investigations of in-
fluence of steel saturation on harmonics value of
flux density in a cage induction motor air gap are
presented. Distribution of high-frequency fields in
the rotor slot, different parts of the rotor core,
frame yoke as well as results of the rotor bar cur-
rent high-harmonics measurements in the rotating
motor are given. Experimental results are in good
qualitative agreement with analytical results ob-
tained with a finite element method.
Key words – cage induction motor, magnetic
field, flux density harmonics steel saturation.
Електротехніка і Електромеханіка. 2006. №3 93
Electric stations
Orlovsky I.V. 45
A simplified active power-to-frequency con-
verter for electric power accounting systems.
A chart of an active power-to-frequency con-
verter and description of its operation are pre-
sented. The converter is intended for application in
automated electric power accounting systems. As
compared to known converters, the converter de-
sign introduced is simplified due to delegating part
of its functions to the system.
Key words – electric power, accounting,
power-to-frequency converter, design.
Electrical Engineering: Theory
Baranov M.I. 49
Wave electronic package of a conductor
with electric conduction current.
On basis of fundamental principles of quan-
tum mechanics and electrodynamics, an approxi-
mate mathematical model is developed to describe
fundamental wave and geometric characteristics of
a wave electron package of a thin metallic conduc-
tor with electric conduction current of arbitrary
amplitude-time parameters. Data are given to
prove validity of analytical data obtained.
Key words – mathematical model, wave elec-
tron package, metallic conductor, electric current.
Volosiuk A.V. 54
Vector potential of magnetic field of a
source in oblate spheroidal coordinate system.
On basis of spatial harmonic analysis, mag-
netic field near surface of oblate technical objects
in oblate spheroidal coordinate system is consid-
ered. Analytical expressions that allow changing
from magnetic field description based on scalar
potential over to field description with spatial har-
monics of vector potential in oblate spheroidal
coordinate system are derived.
Key words – oblate object, vector magnetic
potential, spheroidal spatial harmonic.
Dubovenko K.V. 58
Simulation of capacitor storage charging
circuits with a high frequency loop
A specialized economical algorithm for nu-
merical analysis of capacitor storage charging in
charging circuits with semiconductor frequency
converters is introduced. The approach is accurate
enough real-world applications, allows avoiding
bulky difference schemes used in solving stiff sets
of differential equations. With the method, charg-
ing calculation time is reduced by a 100-to-1000
factor for capacitor storages of high capacitance.
Key words – capacitor storage charging,
semiconductor frequency converters, numerical
methods, difference schemes.
Kuzmin V.V. 64
About mathematical incorrectness in the-
ory of electrical engineering
Causes of the most typical problems and dis-
agreements in the modern theory of electrical en-
gineering are analyzed to reveal that in most cases
they result from incorrectness in application of the
modern mathematical apparatus.
Key words – modern theory of electrical
engineering, problems, mathematical apparatus
application, incorrectness.
Pentegov I.V., Rymar S.V., Volkov I.V. 67
Relation between parameters of electro-
magnetic and schematic circuits and equivalent
circuits of double-winding transformers.
Equations of relation between all parameters
of electromagnetic and schematic circuits (two
magnetically coupled circuits) and galvanically
coupled Т- and pi-equivalent circuits without mag-
netic coupling are deduced for double-winding
transformers. This approach can also be applied to
double-winding reactors. The obtained formulas
facilitate designing of both converting equipment
by means of electromagnetic and electrical sche-
matics of transformers and electromagnetic ele-
ments through application of transformers' equiva-
lent circuits because they unite different ap-
proaches for transformer calculation. Rules of sign
arrangement in the equations of transformers are
systematized.
Key words – double-winding transformer,
parameters, electromagnetic circuit, schematic
circuit, equivalent circuit, rule of signs, equa-
tions of relation.
High Electrical and Magnetic Field Engineering
Boyko N.I., Evdoshenko L.S.,
Zarotchentsev A.I., Ivanov V.M. 80
Four-Channel High-Voltage Spark Discharger
Results of development and investigation of a
4-channel spark gas-filled discharger-trigatron are
given. Electric strength of the outer surface of the
discharger body made of acrylic plastic is
strengthened with polyethylene film. The dis-
charger was used as a peaker at discharging of a
0.15 mcF module onto inductive load of 600 nH.
In the module charging to 400 kV, the maximum
current through the discharger was 280 kA.
Key words – trigatron, gas-filled dis-
charger, spark discharge, electric strength.
Bezprozvannykh G., Naboka B., Morozova H. 82
Radiating resistance of common commer-
cial cables of internal laying.
Influence of radiation on electric capacity and
dielectric loss tangent of commercial network un-
shielded cables of the fifth category is considered.
It is revealed that change of capacity does not ex-
ceed 10 % up to the radiation doze of 30 Mrad. As
for tgδ, the radiation resistance criterion increases
at the doze higher than 10 Mrad. Commercial ca-
bles with polyvinylchloride shielding and without
radiation-modified polyethylene insulation can be
applied at radiation doses under 10 Mrad. As an
attribute of critical cable operation condition, sign
inversion of electric capacity can serve.
Key words – radiation resistance, network
cables, aging, destruction, density, antioxidant,
dielectric loss tangent, capacity, dielectric per-
meability.
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