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Wyszukujesz frazę "electrical motors" wg kryterium: Temat

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    Tytuł:
    The researching ship “Gdynia“
    Autorzy:
    Gierusz, W.
    Łebkowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259154.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship’s hull
    main engine
    tunnel thrusters
    electrical motors
    marine navigation devices
    real-time experiments
    Opis:
    The paper presents the physical model of the sea-going ship. The wooden hull of this ship was obtained from Ship Design and Research Centre and next rebuilt and reconstructed for future tests of the different control systems in the real-time experiments. The paper describes the succeeding stages of the work, steering and driving devices installed on board, power electric diagrams and navigational equipment designated for ship. The range of the possible applications of the constructed vessel are presented at the end of the paper
    Źródło:
    Polish Maritime Research; 2012, S 1; 11-18
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air flow analysis for electrical motors cooling system with Autodesk Simulation CFD 2013 program
    Autorzy:
    Madej, J.
    Będkowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/387310.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    gas and thermal flow analysis
    electrical motors
    cooling systems
    CFD
    maszyny elektryczne
    systemy chłodzące
    CFD analiza zjawisk przepływowych
    Opis:
    In the article the analysis of airflow through electrical motor was conducted and optimal design solution was chosen in order to increase cooling efficiency. Numerical simulations allow to determine the areas of temperature occurrence which may have destructive in-fluence on electrical motor parts and on its safe operation. The numerical calculations of airflow was carried out for two different types of fans as well as for two different housings. An analysis of the construction was carried out by CFD method using Autodesk Simulation CFD 2013. Community results of the analysis, we can conclude that the better solution for machines with fixed direction of rotation is to use in-stead of the radial the axial fan. For axial fan the motor temperature in the same condition was lower by about 5°C.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 2; 89-92
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of work environment on thermal state of electric mine motors
    Autorzy:
    Krok, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/140392.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silnik elektryczny
    maszyna górnicza
    metoda sieci termicznych
    maszyna elektryczna
    wyrobisko górnicze
    electrical mining motors
    thermal network method
    exploitation of electric machines
    coal mine undergrounds
    Opis:
    The paper presents a model for calculations of the temperature field in electric mine motors with a water cooled frame. That model was worked out with use of modified and improved thermal networks developed by the author for determining the temperature distributions in different types of ac machines. Thermal calculations for a selected type of 400 kW mining motor were performed with use of an original computer program. Their results were compared with those obtained from measurements. On the basis of the verified simulation results there was determined the influence of value changes of parameters characterising the work environment condition (ambient temperature, inlet temperature and cooling water discharge, degree of covering the casing with coal dust) on the mining motor thermal state.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 3; 357-370
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new C-dump converter for performance improvement of SR motor drive: conceptual considerations and simulations
    Autorzy:
    Wróbel, K.
    Tomczewski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/97321.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    switched reluctance motors
    electrical drives
    power electronics
    Opis:
    In the article a new type of the C-dump converter type was presented, it was intended to supply switched reluctance drives, which is a modification of the configuration introduced in [1]. A structure and a principle of its working were discussed. In this construction independent supplying sections for each motor phase were used. Differences in construction and working both of the configurations and their influence on efficiency of the drive were discussed. Model results of simulation calculations of electromagnetic torque and phase current waveforms were presented. Applying the new system caused the increase in the efficiency of the drive.
    Źródło:
    Computer Applications in Electrical Engineering; 2014, 12; 288-293
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stepping motor drive system replacing AC electric servo drive in a processing device
    Napęd z silnikiem skokowym zamiast serwonapędu w urządzeniu technologicznym
    Autorzy:
    Wierciak, J.
    Makowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/158780.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
    Tematy:
    siłownik
    napęd elektryczny
    electrical drive
    stepping motors
    servo drives
    Opis:
    As a result of dynamic development that takes place in the field of controlling AC motors, designers of machines and various devices usually apply servo drives with induction or synchronic motors, relying both on their remarkable operational characteristics as well as their long life. However, advanced electronic systems and sophisticated software, necessary for obtaining such characteristics, are quite expensive. The authors present in the paper an ex ample of an actuating system for a processing device powered by AC servo drive. As proved by the model studies that have been carried out, the servo drive can be replaced with a stepping motor that is few Times less expensive, and at the same time meets all the requirements related to its operation.
    Dynamiczny rozwój, jaki dokonuje się w dziedzinie sterowania silników prądu przemiennego powoduje, że konstruktorzy maszyn i urządzeń chętnie stosują serwonapędy z silnikami indukcyjnymi lub synchronicznymi licząc zarówno na ich znakomite charakterystyki funkcjonalne, jak i dużą trwałość. Zaawansowane układy elektroniczne i wyrafinowane oprogramowanie, które umożliwiają uzyskanie takich charakterystyk są jednak dosyć kosztowne. W artykule przedstawiono przykład układu wykonawczego urządzenia technologicznego, napędzanego przez serwonapęd prądu przemiennego. Przeprowadzono badania modelowe, które wykazały, że serwonapęd ten można zastąpić napędem z silnikiem skokowym, wielokrotnie od niego tańszym, spełniającym przy tym wszystkie wymagania funkcjonalne.
    Źródło:
    Prace Instytutu Elektrotechniki; 2011, 253; 165-179
    0032-6216
    Pojawia się w:
    Prace Instytutu Elektrotechniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of industrial frequency converters for project-oriented education of controlled electrical drives
    Autorzy:
    Tarchała, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193405.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    education
    controlled electrical drive
    ac motors
    control algorithms
    designing
    Opis:
    In the perspective of current trends in engineering education, aiming at meeting industry requirements, especially in the field of power electronics and motion control, the article presents a way of teaching electric drive control in undergraduate engineering programmes using experimental setups with AC motors equipped with industrial frequency converters. The setups consist of two motors: induction and PMSM (each one can act as a motor or a load machine) and a number of other elements necessary in contemporary drive systems: speed sensors, temperature sensors and braking resistors. While using such setups students can learn about various issues related to AC motor control, both in terms of scalar and field-oriented control methods in all three drive operating modes: torque, velocity and position control. The laboratory setups allow students to familiarize themselves with such detailed issues as: vector control without a speed sensor, various ways of voltage control in a DC input circuit of the voltage inverter during motor braking or the influence of the type and value of load torque on drive system operation. Classes can have a classical form or they can be taught in the open-laboratory system.
    Źródło:
    Power Electronics and Drives; 2017, 2, 37/2; 103-116
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the influence of inverter PWM speed control methods on the operation of a BLDC motor
    Autorzy:
    Ciurys, M. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/140544.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analysis
    brushless DC motors
    electrical machines
    PWM speed control
    measurements
    Opis:
    An analysis of the influence of inverter PWM speed control methods on the operation of a brushless DC (BLDC) motor was carried out. Field-circuit models of the BLDC motor were developed taking into account rotational speed control by two classic methods: the unipolar H_ON_L_PWM and the bipolar H_PWM_L_PWM. Waveforms of the electrical and mechanical quantities and the motor parameters were computed. The results of the computations were verified by measurements performed on a specially designed test stand. On the basis of the measuredwaveforms of the electrical and mechanical quantities the dependence of the drive system efficiencies and power losses on rotational speed was determined for the two methods of inverter control.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 4; 939-953
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction to the Special Section on Intelligent Fault Monitoring and Fault–Tolerant Control in Power Electronics, Drives and Renewable Energy Systems
    Autorzy:
    Malinowski, Mariusz
    Levi, Emil
    Orlowska-Kowalska, Teresa
    Powiązania:
    https://bibliotekanauki.pl/articles/1193706.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    electrical drives
    permanent magnet machine
    induction motors
    sensor fault
    winding fault
    demagnetization fault
    neural networks
    observers
    Opis:
    This article constitutes an introductory part of the special section on Intelligent Fault Monitoring and Fault-Tolerant Control in Power Electronics, Drives and Renewable Energy Systems. In the current issue of the journal, the first part of this section is published. Accepted articles are focussed mainly on the sensor-fault diagnosis methods for T-type inverter-fed dual- three phase PMSM drives, partial demagnetization, faults of the permanent magnet synchronous generator (PMSG) and online open phase fault detection (FD) in the sensorless five-phase induction motor drive implemented with an inverter output LC filter and third harmonic injection. Also, neural networks (NN) application in the detection of stator and rotor electrical faults of induction motors has been proposed in one of the papers, and the observer-based FD concept for unknown systems using input–output measurements was applied to a brushless direct current motor drive with unknown parameters.
    Źródło:
    Power Electronics and Drives; 2019, 4, 39; 163-165
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transients of electrical and mechanical quantities of a brushless DC motor - computations, measurements
    Autorzy:
    Ciurys, M.
    Dudzikowski, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/141324.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    maszyna elektryczna
    silnik bezszczotkowy
    magnes trwały
    silnik BLDC
    obliczenia
    pomiary
    electrical machines
    BLDC motors
    permanent magnets
    computations
    measurements
    Opis:
    The paper presents a method of computing electrical and mechanical variables of BLDC motors. It takes into account electrical, magnetic and mechanical phenomena in the power supply-converter-BLDC motor-load machine system. The solution to the problem is the so-called circuit-field method. The results determined with the use of time stepping finite element method were used as the parameters of equations of the developed mathematical model. Losses in the motor, losses in transistors and diodes of the converter as well as the actual back EMF waveforms, variable moment of inertia and variable load torque are accounted for. The designed laboratory stand and the test results are presented in the paper. The experimental verification shows the correctness of the developed method, algorithm and program. The developed computational method is universal with respect to different electromechanical systems with cylindrical BLDC motors. It can be applied to electromechanical systems with BLDC motors operating at constant but also variable load torque and moment of inertia.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 23-34
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected elements of a new method of induction motor efficiency determination
    Autorzy:
    Dabala, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/199896.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    maszyny elektryczne
    silniki indukcyjne
    określanie efektywności
    electrical machines
    induction motors
    efficiency under voltage distortions
    intervals in efficiency determination methods
    Opis:
    This paper presents the results of estimating method of the energy consumed by induction motors and the legal situation concerning the efficiency of electrical motors in the European Union. Three elements of a new method of induction motor efficiency determination are described: methodology of taking into account the influence of non-sinusoidal voltage and the voltage unbalance on the motor efficiency and the application of the interval arithmetic in order to determine the border error of the induction motor efficiency. It is proved that the middle of efficiency interval for the direct method of efficiency determination is always equal to or higher than the measurement result and the radius of interval is longer than the border error.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 2; 307-313
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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