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Wyszukujesz frazę "soft materials" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Higher order reversal curves in some hysteresis models
    Autorzy:
    Chwastek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/140836.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    soft magnetic materials
    hysteresis
    modelling
    Opis:
    Some physical concepts important for a hysteresis model (effective field, anhysteretic magnetization) are discussed on the example of Jiles-Atherton model. The Jiles-Atherton model reveals some drawbacks, which make this model more difficult to be applied in electrical engineering. In particular, it does not describe accurately the magnetization curves after a reversal, moreover complex magnetization cycles are poorly represented. On the other hand, the phenomenological description proposed by Takács seems to be a valuable alternative to the Jiles-Atherton formalism. The concept of effective field may be easily incorporated in the description.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 4; 455-470
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical identification of Preisach distribution function including temperature effects
    Autorzy:
    Chelghoum, Leila
    Powiązania:
    https://bibliotekanauki.pl/articles/2086685.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnetic hysteresis
    Preisach distribution function
    Preisach model
    soft ferromagnetic materials
    temperature effect
    Opis:
    Magnetic hysteresis occurs in most electrical engineering devices once soft ferromagnetic materials are exposed to relatively high temperatures. According to several scientific studies, magnetic properties are strongly influenced by temperature. The development of models that can accurately describe the thermal effect on ferromagnetic materials is still an issue that inspires researchers. In this paper, the effect of temperature on magnetic hysteresis for ferromagnetic materials is investigated using a self-developed numerical method based on the Preisach distribution function identification. It employs a parameter depending on both temperature and the Curie temperature. This approach is of the macroscopic phenomenological type, where the variation of the magnetization (in direct connection with the Preisach triangle) is related to the observed macroscopic hysteretic behavior. The isotropic character of the material medium is predominant. The technique relies on a few experimental data extracted from the first magnetization curve provided by metallurgists. The ultimate goal is to provide a simple and robust magnetic behavior modeling tool for designers of electrical devices. Temperature is introduced at the stage of identifying the distribution function of the Preisach model. This method is validated by the agreement between the experimental data and the simulation results. The developed method is very accurate and efficient in modeling the hysteresis of ferromagnetic materials in engineering particularly for systems with ferromagnetic components and electromagnetic-thermal coupling.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 2; 297--309
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of anisotropy in the modified Jiles-Atherton model of static hysteresis
    Autorzy:
    Chwastek, K.
    Szczygłowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/141327.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały magnetycznie miękkie
    histereza
    anizotropia
    modelowanie
    soft magnetic materials
    hysteresis
    anisotropy
    modeling
    Opis:
    An extension of the modified Jiles-Atherton description to include the effect of anisotropy is presented. Anisotropy is related to the value of the angular momentum quantum number J, which affects the form of the Brillouin function used to describe the anhysteretic magnetization. Moreover the shape of magnetization dependent R(m) function is influenced by the choice of the J value.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 49-57
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operating point resolved loss computation in electrical machines
    Autorzy:
    von Pfingsten, G.
    Ruf, A.
    Steentjes, S.
    Hombitzer, M.
    Franck, D.
    Hameyer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/141566.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    efficiency maps
    material degradation
    magnetic losses
    magnetic material
    behaviour
    soft magnetic materials
    electrical machines
    Opis:
    Magnetic circuits of electromagnetic energy converters, such as electrical machines, are nowadays highly utilized. This proposition is intrinsic for the magnetic as well as the electric circuit and depicts that significant enhancements of electrical machines are difficult to achieve in the absence of a detailed understanding of underlying effects. In order to improve the properties of electrical machines the accurate determination of the locally distributed iron losses based on idealized model assumptions solely is not sufficient. Other loss generating effects have to be considered and the possibility being able to distinguish between the causes of particular loss components is indispensable. Parasitic loss mechanisms additionally contributing to the total losses originating from field harmonics, non-linear material behaviour, rotational magnetizations, and detrimental effects caused by the manufacturing process or temperature, are not explicitly considered in the common iron-loss models, probably even not specifically contained in commonly used calibration factors. This paper presents a methodology being able to distinguish between different loss mechanisms and enables to individually consider particular loss mechanisms in the model of the electric machine. A sensitivity analysis of the model parameters can be performed to obtain information about which decisive loss origin for which working point has to be manipulated by the electromagnetic design or the control of the machine.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 1; 73-86
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The accuracy of loss prediction in magnetic materials
    Autorzy:
    Szczygłowski, J.
    Kopciuszewski, P.
    Chwastek, K.
    Najgebauer, M.
    Wilczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/141336.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały magnetycznie miękkie
    predykcja strat
    technika bootstrapowa
    metoda bootstrapowa
    soft magnetic materials
    loss prediction
    bootstrap technique
    Opis:
    The paper presents a formula useful for prediction of loss density in soft magnetic materials, which takes into account multi-scale energy dissipation. A universal phenomenological P(Bm, f) relationship is used for loss prediction in chosen soft magnetic materials. A bootstrap method is used to generate additional data points, what makes it possible to increase the prediction accuracy. A substantial accuracy improvement for estimated model parameters is obtained in the case, when additional data points are taken into account. The proposed description could be useful both for device designers and researchers involved in computational electromagnetism.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 1; 59-66
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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