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    Wyświetlanie 1-7 z 7
    Tytuł:
    Analysis of electromagnetic performance of the interior permanent magnet brushless DC motor with stator slot skewed structure based on quasi-3D moving electromagnetic-field circuit coupling calculation
    Autorzy:
    Gan, Xue-Gui
    Fan, Zhen-Nan
    Li, Jing-Can
    Powiązania:
    https://bibliotekanauki.pl/articles/2042795.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    interior permanent magnet brushless DC motor
    quasi-three-dimensional electromagnetic-field circuit coupling analysis
    stator slot skew
    Opis:
    This paper takes a 50 kW interior permanent magnet brushless DC motor as an example, and explores the influence of the degree of stator slot skew on the overall motor magnetic density and air gap magnetic density; then reveals the influences of stator slot skewed structure on a series of key electromagnetic properties like no-load back electromotive force (B-EMF), cogging torque, electromagnetic torque, torque fluctuation, electromagnetic loss, input power, output power and operating efficiency. On this basis, a relatively best range of the skew degrees is obtained. The research work in this paper has direct reference value for the further improvement of design and manufacture, operation and maintenance, control and protection of such motors.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 1; 159-174
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved algorithm for periodic steady-state analysis in nonlinear electromagnetic devices
    Autorzy:
    Sobczyk, T. J.
    Radzik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/201260.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electromagnetic devices
    steady-state analysis
    periodic solutions
    analysis in time domain
    discrete differential operator
    iterative algorithms
    Opis:
    This paper presents the improved methodology for the direct calculation of steady-state periodic solutions for electromagnetic devices, as described by nonlinear differential equations, in the time domain. A novel differential operator is developed for periodic functions and the iterative algorithm determining periodic steady-state solutions in a selected set of time instants is identified. Its application to steady-state analysis is verified by an elementary example. The modified algorithm reduces the complexity of steady-state analysis, particularly for electromagnetic devices described by high-dimensional nonlinear differential equations.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 863-869
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FE analysis of current displacement phenomena in a squirrel cage motor working at cryogenic temperature
    Autorzy:
    Barański, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/950666.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FE analysis of submerged induction motor
    cryogenic temperature
    coupled electromagnetic-thermal phenomena
    current displacement
    Opis:
    The paper presents the special software for transient FE analysis of coupled electromagnetic-thermal problems in a squirrel cage submerged motor working at cryogenic temperature. A time-stepping finite element method and transients analysis of an induction motor has been applied. The non-linearity of the magnetic circuit, the movement of the rotor, skewed slots, and the influence of temperature on electric and thermal properties of the materials has been taken into account. Developed on the basis of presented algorithm a computer program used to analyze the phenomenon of current displacement in the rotor bars of high-voltage cage induction motor working in cryogenic conditions. The results of the simulations are presented.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 2; 139-147
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fusing the electromagnetic articulograph, high-speed video cameras and a 16-channel microphone array for speech analysis
    Autorzy:
    Mik, Ł.
    Lorenc, A.
    Król, D.
    Wielgat, R.
    Święciński, R.
    Jędryka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/200263.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electromagnetic articulography
    microphone array
    vision system
    speech analysis
    artykulograf elektromagnetyczny
    system wizyjny
    analiza mowy
    Opis:
    Electromagnetic articulography (EMA) is one of the instrumental phonetic research methods used for recording and assessing articulatory movements. Usually, articulographic data are analysed together with standard audio recordings. This paper, however, demonstrates how coupling the articulograph with devices providing other types of information may be used in more advanced speech research. A novel measurement system is presented that consists of the AG 500 electromagnetic articulograph, a 16-channel microphone array with a dedicated audio recorder and a video module consisting of 3 high-speed cameras. It is argued that synchronization of all these devices allows for comparative analyses of results obtained with the three components. To complement the description of the system, the article presents innovative data analysis techniques developed by the authors as well as preliminary results of the system’s accuracy.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 3; 257-266
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modal-frequency spectrum of magnetic flux density in air gap of permanent magnet motor
    Autorzy:
    Witczak, P.
    Kubiak, W.
    Lefik, M.
    Szulakowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/140681.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electromagnetic fields
    waves permanent magnet machines
    air gap magnetic flux
    spectral analysis
    finite element method
    Opis:
    The classic relationships concerning the harmonic content in the air gap field of three-phase machines are presented in form of series of rotating waves. The same approach is applied to modeling of permanent magnet motors with fractional phase windings. All main reasons of non-sinusoidal shape of flux density distribution, namely, magnets’ shape and their placement, slotting, magnetic saturation and eccentricity are also related to their counterparts in modal-frequency spectrum. The Fourier 2D spectrum of time-stepping finite element solution is confronted with results of measurements, with special attention paid to accuracy of both methods.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 1; 29-46
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets
    Autorzy:
    Sun, X.
    Su, B.
    Chen, L.
    Yang, Z.
    Li, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/200490.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bearingless motor
    permanent magnet motor
    finite element analysis
    cogging torque
    static electromagnetic characteristics
    silnik z magnesem trwałym
    analiza elementów skończonych
    moment skręcający
    właściwości elektromagnetyczne
    silnik bezłożyskowy
    Opis:
    In this paper, a new type of interior composite-rotor bearingless permanent magnet synchronous motors (BPMSMs) with two layer permanent magnets (PMs) is proposed. In order to reduce the torque ripple of this kind of motors, the sizes of PMs are optimized. Moreover, the magnetic field analysis of the interior composite-rotor BPMSM with two layer PMs is carried out by the finite element method (FEM). The corresponding static electronic magnetic characteristics at no load, including magnetic field, PM flux linkage and inductance, are studied in detail. In addition, electromagnetic torque characteristics and suspension force characteristics are also investigated thoroughly. The results of the analysis and simulation lay a significant foundation for further research on the interior composite-rotor BPMSMs with two layer PMs.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 833-843
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-level approach for solving the inverse problem of defects identification in Eddy Current Testing - type NDT
    Autorzy:
    Putek, P.
    Crevecoeur, G.
    Slodička, M.
    Gawrylczyk, K.M.
    Van Keer, R.
    Dupré, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/140340.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    charakterystyka wad
    elektromagnetyczny problem odwrotny
    problem odwrotny
    algorytmy optymalizacji
    algorytmy dwupoziomowe
    badanie wiroprądowe
    analiza wrażliwości
    defect characterization
    electromagnetic inverse problem
    two level optimization algorithms
    eddy current testing method
    sensitivity analysis
    Opis:
    This work deals with the inverse problem associated to 3D crack identification inside a conductive material using eddy current measurements. In order to accelerate the time-consuming direct optimization, the reconstruction is provided by the minimization of a last-square functional of the data-model misfit using space mapping (SM) methodology. This technique enables to shift the optimization burden from a time consuming and accurate model to the less precise but faster coarse surrogate model. In this work, the finite element method (FEM) is used as a fine model while the model based on the volume integral method (VIM) serves as a coarse model. The application of the proposed method to the shape reconstruction allows to shorten the evaluation time that is required to provide the proper parameter estimation of surface defects.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 4; 497-518
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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