- Type of paper
: Paper in journal
Title: Measurement of Torque-Slip Curve of Induction Motors
During Starting
- Authors:
- Štefanko, Stjepan
- Pužar, Milica
Journal: AUTOMATIKA 1-2/1992 GODINA 33
Number: 1
ISSN: 0005-1144
Volume: 33
Year: 1992
Pages: from 41 to 45
Number of references: 5
Language: hrvatski
Summary: The paper analyses conditions which have to be fulfilled,
so thatmeasurements of torque during start-up result in a
quasi-statictorque-slip curve. The necessary (idealised)
frequencycharacteristic of the modified apparatus for differentiating
thetacho-voltage has been defined for the case where measurement iscarried
out by means of differentiating the tacho-voltage. As anexample a device
based on passive elements (differentiator withRC member) is presented, and
results of measurements are comparedwith those obtained by a dynamometer.
Keywords: Measurement, induction motor, torque-slip curve, quasi-static, start-up
- Type of paper
: Paper in journal
Title: Accuracy of the Rotating Electric Machines Airborne Noise
Measurements in the Anechoic Room
- Authors:
- Bogut, Marijan
Journal: ELEKTROTEHNIKA 36(1993) 1-2
Number: 1
ISSN: 0013-5844
Volume: 36
Year: 1993
Pages: from 7 to 14
Number of references: 5
Language: hrvatski
Summary: The paper discusses accuracy of procedures for sound
pressure andsound power level determination in the anechoic room according
toInternational Standards ISO 3745 and ISO 1680/1. The measurementresults
for different sizes of machines in a free sound field arefree sound field
over a reflecting plane have been compared. Thecomparison approved that the
procedure of noise measurement in afree sound field over a reflecting plane
with five measuringpoints has been the most acceptable by its simplicity
andsufficient accuracy.
Keywords: Machine noise, electric machine, anechoic room, measurement accuracy, results comparison
- Type of paper
: Paper in journal
Title: Noise Level of Squirrel-Cage Induction Motors in a Case of
Static Converters Supply
- Authors:
- Bogut, Marijan
- Paljan, Davorin
Journal: ELEKTROTEHNIKA 36(1993) 3
Number: 3
ISSN: 0013-1144
Volume: 36
Year: 1993
Pages: from 97 to 102
Number of references: 5
Language: hrvatski
Summary: The complex, nonsinusoidal, wave from of converter supplies
causedifferent undesired effects on the induction motor perfomance, inwhich
the expected audible noise level increase may be one ofgreat importance.
The results of acoustical measurement for afew motors have been given for
different types of commonly usedconverters and noise level in a reference
to sinusoidal supplyhas been compared. The prediction of noise level of
motorsupplied by specific converter is a next step. For that purposethe
programme of additional research activites has been proposed.
Keywords: Squireel-cage induction machine, machine noise, static convertors supply, noise level prediction, research programme
- Type of paper
: Paper in proceedings
Title: Losses and torque pulsation decrease of the D.C. motor
supplied by ripple current
- Authors:
- Čunko, Stjepan
Proceedings title: ZBORNIK RADOVA JUREMA 36, 2. svezak
Language: hrvatski
Place: Zagreb-Tuheljske Toplice, Hrvatska
Year: 1991
ISBN/ISSN: 86-81571-10-1
Pages: from 76 to 78
Meeting: TREĆI SIMPOZIJ UPRAVLJANI ELEKTROMOTORNI POGONI
Held: from 04/18/91 to 04/20/91
Summary: The article deals with D.C. motor ripple supply current
impact toadditional losses and torque ripples as well as thoseunfavourable
effects reduction methods.
- Type of paper
: Paper in proceedings
Title: Special requirements on converter fed induction traction
motor
- Authors:
- Čunko, Stjepan
- Pavličević, Milorad
- Štefanko, Stjepan
- Trkulja, Mile
Proceedings title: ZBORNIK RADOVA JUREMA 36, 2. svezak
Language: hrvatski
Place: Zagreb-Tuheljske Toplice, Hrvatska
Year: 1991
ISBN/ISSN: 86-81571-10-1
Pages: from 46 to 49
Meeting: TREĆI SIMPOZIJ UPRAVLJANI ELEKTROMOTORNI POGONI
Held: from 04/18/91 to 04/20/91
Summary: The paper deals with technical requirements for railway
tractionmotors with special reference to international standards
forinduction traction motors.
In connectoin with this specifics of design of static converterfed
induction traction motors are pointed out.
- Type of paper
: Paper in proceedings
Title: Development and testing of D.C. spindle drive
- Authors:
- Fumić, Dragan
- Pavličević, Milorad
- Kurtović, Ivan
Proceedings title: ZBORNIK RADOVA JUREMA 36, 2. svezak
Language: hrvatski
Place: Zagreb-Tuheljske Toplice, Hrvatska
Year: 1991
ISBN/ISSN: 86-81571-10-1
Pages: from 21 to 24
Meeting: TREĆI SIMPOZIJ UPRAVLJANI ELEKTROMOTORNI POGONI
Held: from 04/18/91 to 04/20/91
Summary: In the paper, the developoment and testing of the DC
spindledrive for the milling machine AG 400 CNC is described.
Specialrequirements on the vibration class and high level of the
finalmachining are fulfilled during the developoment and testproduction.
Methods and the results of DC spindle drive testingare described.
- Type of paper
: Paper in proceedings
Title: Acquisition and analysis of a sudden short circuit test of
a synchronous generator on a computer
- Authors:
- Mandić, Ivan
- Kurtović, Ivan
- Radonić, Darko
Proceedings title: ZBORNIKA RADOVA JUREMA 36, 2. svezak
Language: hrvatski
Place: Zagreb-Tuheljske Toplice, Hrvatska
Year: 1991
ISBN/ISSN: 86-81571-10-1
Pages: from 62 to 65
Meeting: TREĆI SIMPOZIJ UPRAVLJANI ELEKTROMOTORNI POGONI
Held: from 04/18/91 to 04/20/91
Summary: Reactances and time constans of synchronous generators
areexperimentally determined from sudden short circuit tests. Thisis
usually done by a grapho-analytical analysis of currentoscillograms. The
paper describes a procedure of data acquisitionand analysis by means of an
A-D converter and a computer. A largenumber of instantantaneous values of
the signal are acquired. Themachine parameters are then determined by a
procedure wheremeasured and theoretical values of current are matched by
meansof the least-squares method.
- Type of paper
: Paper in proceedings
Title: Automatic testing of tractive capacity and energy
consumption of electric locomotive
- Authors:
- Šakić, Željko
- Gazibara, Vladimir
Proceedings title: ZBORNIK RADOVA JUREMA 36, 2. svezak
Language: hrvatski
Place: Zagreb-Tuheljske Toplice, Hrvatska
Year: 1991
ISBN/ISSN: 86-81571-10-1
Pages: from 79 to 82
Meeting: TREĆI SIMPOZIJ UPRAVLJANI ELEKTROMOTORNI POGONI
Held: from 04/18/91 to 04/20/91
Summary: The automatic measuring system of tractive capacity and
energyconsumption of electric locomotive supplied from catenery 25kV,50Hz
is described. System is suitable interconnection ofspecific measuring
sensors, computercontrolled measuring devices,personal computer and
equipment for presentation and reproductionof measured results. Measuring
system is organizied as one online monitoring system applied in real
traction exploatationconditions on the railways.
- Type of paper
: Paper in proceedings
Title: Zones of elasto-plastic stress and their infuence on motor
life-time at fatigne of construction
- Authors:
- Pavličević, Milorad
Proceedings title: Zbornik radova 7. jugoslavenskog simpozija o plastičnosti
Language: hrvatski
Place: Pula
Year: 1991
Pages: from 163 to 169
Meeting: 7. JUGOSLAVENSKI SIMPOZIJ O PLASTIČNOSTI
Summary: The effects of elasto-plastic stress zones on life of
largesquirrel-cage motors in operation with heavy starting ofelectromotor
drive are analysed.
- Type of paper
: Paper in proceedings
Title: Comparisson of computed and measured losses for different
slot shapes of squirel-cage induction machines for sinusoidal and
nonsinusoidal supply
- Authors:
- Štefanko, Stjepan
Proceedings title: Zbornik radova 37. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 86-81571-11-7
Pages: from 490 to 493
Meeting: Simpozij o elektromotornim pogonima i energetskoj elektronici
Held: from 04/26/92 to 04/29/92
Summary: Measured and computed losses for sinusoidal and
nonsinusoidalsupply are compared for a traction induction motor
model.Computations were carried out by means of KASIAB and NENAMcomputer
programs.
- Type of paper
: Paper in proceedings
Title: A contribution to study of the influence of nonsinusoidal
power supply on the temperature rise of converter-fed cage induction motor
- Authors:
- Kurtović, Ivan
- Gazibara, Vladimir
- Tandarić, Tomo
Proceedings title: Zbornik radova 37. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 86-81571-11-7
Pages: from 494 to 497
Meeting: Simpozij o elektromotornim pogonima i energetskoj elektronici
Held: from 04/26/92 to 04/29/92
Summary: The losses and their influence on temperature rise at
sinusoidaland nonsinusoidal power supply of induction motors are
compared.The analysis made firstly by computation was
verifiedexperimentally on an example of 50 kW motor. The tests
wereperformed using a computer and a power analyzer (NORMA D5135).
- Type of paper
: Paper in proceedings
Title: Determination of DC motors armature inductivity by
measuring the current ripple
- Authors:
- Čunko, Stjepan
- Momić, Milorad
- Fumić, Dragan
Proceedings title: Zbornik radova 37. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 86-81571-11-7
Pages: from 517 to 521
Meeting: Simpozij o elektromotornim pogonima i energetskoj elektronici
Held: from 04/26/92 to 04/29/92
Summary: When a DC motor is supplied from thyristor converter, the
currentin the armature contains an alternating componenet affecting
themotor commutation. The magnitude of the alternating component ofcurrent
depends on the type of the converter and the totalinductivity of the motor
armature. The paper describes the methodof determining the additional
inductivity required for reductingthe alternating component of current by
measuring its amplitude.Messurement results obtained on a series of KONČAR
- Rijeka DCmotors are given.
- Type of paper
: Paper in proceedings
Title: Algorithm for selection of DC motors in machine tool main
drive
- Authors:
- Fumić, Dragan
- Kurtović, Ivan
Proceedings title: VI međunarodno savjetovanje o elektromotornim pogonima
Language: hrvatski
Place: Brijuni, HR
Year: 1992
Pages: from 184 to 187
Meeting: VI međunarodno savjetovanje o elektromotornim pogonima
Held: from 10/13/92 to 10/15/92
Summary: The paper deals with requirements on machine tool main
drivesrelated to technological process of machining. It is pointed tothe
problems to be solved at selection of motors for this kind ofdrives, and
algorithm is given for selection of D.C. motors inmachine tool main drives.
- Type of paper
: Paper in proceedings
Title: Inverter fed induction motor with arbitrary voltage
waveshape (unwanted consequences)
- Authors:
- Tomljenović, Veselko
Proceedings title: VI međunarodno savjetovanje o elektromotornim pogonima
Language: hrvatski
Place: Brijuni, HR
Year: 1992
Pages: from 231 to 234
Meeting: VI međunarodno savjetovanje o elektromotornim pogonima
Held: from 10/13/92 to 10/15/92
Summary: In the paper, the variable speed drive constituted by an
inverterfed induction motor with arbitrary voltage waveshape, is
studied.Unwanted consequences - parasitic effects like additional
torquesand losses are dealt with. A knowledge of the equivalent
circuitparameters of the motor across the harmonic spectrum is required.The
amplitudes of oscillating torques, which produce torsionalvibrations in the
mechanical system, can vary over a wide range.
- Type of paper
: Paper in proceedings
Title: Electric drive for autonomous electric vehicle based on
separately excited DC motor
- Authors:
- Banović, Zrinko
- Fumić, Dragan
- Magzan, Ante
Proceedings title: Zbornik radova 38. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6037-00-9
Pages: from 646 to 650
Meeting: 38. međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: Electric drive for electric vehicle EKS-1001 based on
existingmechanical assembly is presented. Instead of existing seriesfield
winding DC motor type IK9 M1, a separately excited DC motortype IKL9 M1 is
used, with similar outer dimensions. Supply andcontrol unit is based on
principles of cascade regulation of DCmotor in the armature control range
and the field weakeningregion. Converter stage is based on MOSFET
switches.Microcontroller executes control, supervising and protectiontasks.
Control algorithm enables motoring and regeneratingaction. Calculation and
simulation results carried out indicatethat this concept improves vehicle
characteristics: maximumspeed, controlled acceleration and deceleration.
- Type of paper
: Paper in proceedings
Title: Noise of induction motors operating from nonsinusoidal
supplies in comparison with sinusoidal supply
- Authors:
- Bogut, Marijan
- Paljan, Davorin
Proceedings title: Zbornik radova 38. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6037-00-9
Pages: from 683 to 686
Meeting: 38. međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: The complex, nonsinusoidal wave forms from converter
suppliescause different undesired effects on the induction motorperfomance.
The expected audible noise level increase could beone of the greatest
importance. The results of acusticalmeasurement on a few motors have been
given for different typesof commonly used converters. The noise levels have
been comparedin a reference to sinusoidal supply. The prediction of
noiselevel for motor supplied by specific converter is a next step. Ina
that purpose the programme of additional research activitieshas been
proposed.
- Type of paper
: Paper in proceedings
Title: Measurement of stray load losses in induction machines
- Authors:
- Štefanko, Stjepan
- Pužar, Milica
Proceedings title: Zbornik radova 38. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6037-00-9
Pages: from 687 to 690
Meeting: 38. međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: The load losses of induction machines under normal
runningconditions consist of main losses (stator and rotor windinglosses,
stator fundamental frequency core losses, friction andwindage losses),
stray no-load losses and stray load losses dueto the leakage fluxes. The
stray load losses are mostly locatedin the stator and rotor core
laminations (surface and pulsationlosses), in the rotor winding and in some
cases in the statorwinding due to the secondary armature reaction. Also,
insquirrel-cage induction machines with skewed rotor slots, thereare losses
due to the cross-bar-currents.
The paper describes the reverse rotation test as a method ofmeasurement of
stray load losses.
- Type of paper
: Paper in proceedings
Title: Measurement of stray no-load losses in induction machines
- Authors:
- Štefanko, Stjepan
- Pužar, Milica
Proceedings title: Zbornik radova 38. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6037-00-9
Pages: from 691 to 694
Meeting: 38. međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: In induction machines at no-load, stray no-load losses
arepresent besides fundametal losses (stator winding losses,
statorfundametal frequency core losses, friction and windage losses).The
stray no-load losses are mostly located in the stator androtor core
laminations (surface and pulsation losses) and in therotor winding. Also,
in squirrel-cage induction machines withskewed rotor slots, there are
losses due to thecross-bar-currents.
The paper describes a method of measurement of stray no-loadlosses, known
as a hysteresis jump.
- Type of paper
: Paper in proceedings
Title: New generation of chopper fed D.C. motors for autonomous
electrical vehicles
- Authors:
- Fumić, Dragan
- Magzan, Ante
- Banović, Zrinko
Proceedings title: Zbornik radova 38. međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6037-00-9
Pages: from 695 to 698
Meeting: 38. međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: New generation of chopper fed D.C. motors for
autonomouselectrical vehicles (electric trucks, electric fork
lifts,platform trucks and tractors, electromobiles ...) is developed.Main
chatacteristics are: fully laminated magnetic circuit,improved statics and
dinamics characteristics and higherefficiency.
- Type of paper
: Paper in proceedings
Title: Influence of inverter voltage higher harmonics on the
squirrel-cage induction motor noise
- Authors:
- Bogut, Marijan
Proceedings title: 39. godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 403 to 406
Meeting: 39. godišnji skup KoREMA
Held: from 04/25/94 to 04/27/94
Summary: The paper is a part of the research in order to reduce the
audible noise level increase of motors supplied by semiconductor frequency
converters. The expected increase is caused by harmonic component in the
autput waveforms of these converter. The influence of higher frequency
voltage harmonics on the magnetic noise spectrum of a three-pluse
squirrel-cage induction motor is analysed. The mesurement results for the
PWM inverter are given.
- Type of paper
: Paper in proceedings
Title: Laws of control for electrical machines in steady state
- Authors:
- Štefanko, Stjepan
Proceedings title: Proceedings of the 8th International Conf. on Electrical Drives and Power Elec.
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 1 to 6
Meeting: EDPE'94, 8th International Conference on Electrical Drives and Power Electronics
Held: from 09/12/94 to 09/14/94
Summary: Laws of control for AC and DC machines are derived for
speeds lower than the nominal speed and for the condition that machines
efficiencies are at each speed optimal. The laws have been verified on
several examples using the standard computation programmes for electrical
machines.
- Type of paper
: Paper in proceedings
Title: Generating set with tractor driven asynchronous generator
- Authors:
- Kurtović, Ivan
- Kajari, Mladen
- Štefanko, Stjepan
Proceedings title: Proceedings of the 8th International Conferencee on Elec. Drives and Power Elec.
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 249 to 252
Meeting: EDPE'94, 8th International Conference on Electrical Drives and Power Electronics
Held: from 09/12/94 to 09/14/94
Summary: Generating set with asynchronous generator is decribed. The
conection to the power take off tractor shaft is carried out by means of
cardan shaft and gear box. This generating set is the stationary energency
set. For agricurtural and forest work it can be used as a main power
supply.
- Type of paper
: Mentorship
Title: Research of vibroacoustical behaviour of squirrel-cage
induction motor supplied from semiconductor frequency converter
Faculty: Elektrotehnički fakultet u Zagrebu
Mentor: PALJAN DAVORIN
Date of defense: 06/07/94
Number of pages: 110
Author: Bogut dipl.inž. Marijan
Degree level: M.A.
- Type of paper
: New product
Title:
- Authors:
- Kurtović, Ivan
- Štefanko, Stjepan
Approved by institution: KONČAR - Institut za elektrotehniku
- Type of paper
: Invited lecture
Title: Rotor reaction on harmonic field in air gap
Institution: Tehnički fakultet , Univerzitet u Mariboru
Year: 1995
- Type of paper
: Invited lecture
Title: Stray fields in electrical machines
Institution: Tehnički fakultet , Univerzitet u Mariboru
Year: 1995
- Type of paper
: Other
Title:
