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Wyszukujesz frazę "thermal network method" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    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:
    An extended dynamic thermal model of a permanent magnet excited synchronous motor
    Autorzy:
    Mbo'o, Ch. P.
    Hameyer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/140883.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal modeling
    thermal network
    finite element method
    iron losses
    permanent magnet excited synchronous machine (PMSM)
    Opis:
    The purpose of this paper is to develop a dynamic thermal model of a permanent magnet excited synchronous motor (PMSM). The model estimates the temperature at specific points of the machine during operation. The model is implemented using thermal network theory, whose parameters are determined by means of analytical approaches. Usually thermal models are initialized and referenced to room temperature. However, this can lead to incorrect results, if the simulations are performed when the electrical machine operates under “warm” conditions. An approach is developed and discussed in this paper, which captures the model in critical states of the machine. The model gives feedback by online measured quantities to estimate the initial temperature. The paper provides an extended dynamic thermal model, which leads to a more accurate and more efficient thermal estimation.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 3; 375-386
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal - electrical analogy in dynamic simulations of buildings: comparison of four numerical solution methods
    Autorzy:
    Michalak, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1819185.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    thermal-electrical analogy
    RC network
    lumped capacitance
    BESTEST
    Euler method
    Heun's method
    analogia termiczna
    analogia elektryczna
    metoda Eulera
    Opis:
    The lumped capacitance method is widely used in dynamic modelling of buildings. Models differ in complexity, solution methods and ability to simulate transient behaviour of described objects. The paper presents a mathematical description of a simple 1R1C thermal network model of a building zone. Four numerical methods were applied to solve differential equation describing its dynamics. For validation purposes two test cases (600 and 900) from the BESTEST procedure were used. In both cases detailed results were given. Better ability of the simulation model to reproduce transient behaviour of the modelled buildings was noticed in case of the lightweight object (case 600). Annual heating and cooling demand was within the reference range for heavyweight one (case 900). The kind of the computation method had no significant effect on simulation results.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2020, 4, 2; 179--188
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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