Sökning: "sven hörnfeldt"

Hittade 3 avhandlingar innehållade orden sven hörnfeldt.

  1. 1. Studies of the Fermi surface in antimony and some transition metals

    Författare :Sven Hörnfeldt; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 2. Studies of high-temperature superconducting tapes and their application in power apparatus

    Författare :Torbjörn Wass; Sven Hörnfeldt; Runde Magne; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electrocity physics; magnetism; electronics engineering; electrical engineering; Electrical engineering; Elektroteknik;

    Sammanfattning : Intensive development in the field of high-temperature superconductors (HTS) has resulted in long length HTS with high current carrying capacity. The performance of HTS in the form of multifilamentary silver sheathed Bi-2223 tapes is close to the requirements for power application. LÄS MER

  4. 3. AC losses in HTS as a function of magnetic fields with arbitrary directions

    Författare :Anna Wolfbrandt; Sven Hörnfeldt; Ole Tönnessen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; High-temperatur superconductors; AC loss modelling; hysteresis; E - J characteristic; Elektronik; Electronics; Elektronik;

    Sammanfattning : Although a superconductor has zero resistivity when carrying a direct current, losses do occur when it is exposed to an alternating magnetic field and/or is carrying an alternating current. The magnitude of these so-called AC losses depends on the operating temperature, the amplitude and the direction of the magnetic field, the transport current, and the frequency. LÄS MER