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    Wyświetlanie 1-3 z 3
    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:
    Analysis of capacitance of a cryogenic by-pass line for SIS100 particle accelerator at FAIR
    Autorzy:
    Tomków, Ł.
    Trojanowski, S.
    Ciszek, M.
    Chorowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140368.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    line capacitance
    superconducting bus-bars
    particle accelerators
    Opis:
    Safety and operation efficiency of the particle accelerators strongly depend on the quality of the supplied electric current and is affected by the electric properties of all elements of the circuit. In this paper the capacitance of the superconducting bus-bars applied in the cryogenic by-pass line for the SIS100 particle accelerator at FAIR is analysed. The unit capacitance of the bus-bars is calculated numerically and found experimentally. A 2D numerical model of a cross-section of the cable is applied. The capacitance is found with three methods. The stored energy, electric displacement field and charge gathered on the surfaces of the device are calculated and analysed. The obtained values are consistent. Experimental measurements are performed using the resonance method. The measuring system is undamped using a negative conductance converter. Small discrepancies are observed between numerical and experimental results. The obtained values are within the requirements of the accelerator design.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 4; 803-814
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of inductances and induced currents in cryogenic by-pass line for SIS100 particle accelerator at FAIR
    Autorzy:
    Tomków, Łukasz
    Trojanowski, Stanisław
    Ciszek, Marian
    Chorowski, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/141153.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    line inductance
    mutual inductance
    induced currents
    superconducting bus-bars
    particle accelerators
    Opis:
    Quality of electric current delivered to the magnets of a particle accelerator is essential for safety and reliability of its operation. Even small discrepancies strongly affect the properties of particle beams. One of the sources of the disturbances is the appearance of induced currents caused by the electromagnetic interactions between the elements of the machine. In this paper the calculations of induced currents in by-pass lines of a SIS100 particle accelerator are presented. In order to find the values of the currents the self-inductances and mutual inductances of the by-pass lines are found. Due to the complex geometry of the line, especially of Ω-shaped dilatations, the numerical approach was employed. The calculations show that the size of induced currents increases with the distance between the cables in an individual bus-bar. The maximum discrepancy of the magnetic field in a dipole magnet is found to be 7.7 μT. The decrease of distance between the cables allows one to obtain a discrepancy of 1.2 μT.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 3; 485-496
    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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