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Wyszukujesz frazę "Franck, K." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Soft X-Ray Spectromicroscopy and its Application to Semiconductor Microstructure Characterization
    Autorzy:
    Gozzo, F.
    Franck, K.
    Howells, M. R.
    Hussain, Z.
    Warwick, A.
    Padmore, H. A.
    Triplett, B. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963346.pdf
    Data publikacji:
    1997-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.-d
    85.40.-e
    79.60.-i
    Opis:
    The universal trend towards device miniaturization has driven the semiconductor industry to develop sophisticated and complex instrumentation for the characterization of microstructures. Many significant problems of relevance to the semiconductor industry cannot be solved with conventional analysis techniques, but can be addressed with soft X-ray spectromicroscopy. An active spectromicroscopy program is being developed at the Advanced Light Source, attracting both the semiconductor industry and the materials science academic community. Examples of spectromicroscopy techniques are presented. An Advanced Light Source μ-XPS spectromicroscopy project is discussed, involving the first microscope completely dedicated and designed for microstructure analysis on patterned silicon wafers.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 4; 697-705
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conformal mapping approach for permanent magnet synchronous machines: on the modeling of saturation
    Autorzy:
    Hafner, M.
    Franck, D.
    Hameyer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/140510.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    moment obliczeniowy
    pole magnetyczne
    SM-PMSM
    conformal mapping
    air gap permeance
    magnetic field
    torque computation
    Opis:
    In the electromagnetic field simulation of modern servo drives, the computation of higher time and space harmonics is essential to predict torque pulsations, radial forces, ripple torques and cogging torque. Field computation by conformal map ping (CM) techniques is a time-effective method to compute the radial and tangential field components. In the standard CM approach, computational results of cogging torque simulations as well as overload operations observe deviations to nonlinear finite element (FE) simulations due to the neglection of slot leakage and saturation effects. This paper presents an extension of the classical CM. Additional CM parameters are computed from single finite element computations so as to consider both effects listed above in the model over a wide operation range of the electrical drive. The proposed approach is applied to a surface permanent magnet synchronous machine (SM-PMSM), and compared to numerical results obtained by finite element analysis (FEA). An accuracy similar to that of FE simulations is obtained with however the low computation time that is characteristic for analytical models.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 2; 211-220
    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
      Wyświetlanie 1-3 z 3

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