• A Method to Estimate the Necessary Twist Pitch in Multi-filamentary Superconductors 

      Lindau, Sandra Madeleine; Magnusson, Niklas; Taxt, Henning (Journal article; Peer reviewed, 2014)
      Twisting of multi-filamentary superconductors is an important step in the development of wires with AC losses at an acceptable level for AC applications. The necessary twist pitch depends on wire architecture, critical ...
    • AC Loss in MgB2 Superconductors: Calorimetric Loss Measurement 

      Taxt, Henning (Master thesis, 2012)
      Ever since the phenomenon of superconduction was discovered, and especially after the discovery of high-temperature superconductors (HTS) in the mid-80s, there has been high expectations to what could be achieved by this ...
    • AC loss measurements multi-filamentary MgB2 wires with non-magnetic sheath material 

      Taxt, Henning; Magnusson, Niklas; Runde, Magne; Brisigotti, S (Journal article; Peer reviewed, 2012)
      The MgB2 superconductor is an attractive choice for many high-current DC applications, particularly for its low cost compared to e.g. YBCO, and the higher operating temperature than the low-temperature superconductors. To ...
    • AC losses in MgB2 superconductors 

      Giljarhus, Sigrid Anne (Master thesis, 2007)
      This Master thesis studies losses in superconductors. Losses arise when the superconductor carries alternating current or is placed in an alternating magnetic field. As most power applications involve at least one of the ...
    • AC-tap i MgB2-superleder: Effekt av simulert slaglende 

      Lindau, Sandra Madeleine (Master thesis, 2013)
      Superconductive materials can conduct DC currents without energy losses when cooled down below their critical temperature. However, under AC conditions, energy losses appear in the superconductor. In 2001 the new and ...
    • Apparatus for calorimetric measurements of losses in MgB2 superconductors exposed to alternating currents and external magnetic fields 

      Taxt, Henning; Magnusson, Niklas; Runde, Magne (Journal article; Peer reviewed, 2013)
      Inexpensive superconducting wires with low AC losses would open up for a large superconductor market in AC electrical power applications. One candidate for this market is the MgB2 conductor. In the development of an AC ...
    • Assembly and Testing of Superconducting Field Winding 

      Paulsen, Morten Ellingsen (Master thesis, 2016)
      Superconducting rotor windings are considered for large offshore wind turbines to reduce weight, size and cost. The European project INNWIND.EU utilize various national projects in different European countries to accelerate ...
    • Coupling currents and hysteresis losses in MgB2superconductors 

      Magnusson, Niklas; Lindau, Sandra Madeleine; Taxt, Henning; Runde, Magne (Journal article; Peer reviewed, 2014)
      MgB2 multi-filamentary superconductors are widely considered for use in dc applications. To expand the possible application range to ac apparatuses, the development of a low ac loss wire is needed. This development involves ...
    • Experimental Determination of Losses in MgB2 Superconductors for Wind Turbine Applications 

      Moslått, Lars-Erik (Master thesis, 2017)
      Superconducting generator field windings are suggested for the next generation of wind turbines. The foreseen wind turbines with power ratings greater than 10 MW give raise to technical challenges. Superconducting field ...
    • Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator 

      Magnusson, Niklas; Eliassen, J. C.; Abrahamsen, Asger B; Hellesø, Svein Magne; Runde, Magne; Nysveen, Arne; Moslått, Lars-Erik; Bjerkli, Jarle; King, Patrick (Journal article; Peer reviewed, 2018)
      Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in ...
    • Large Superconducting Wind Turbine Generators 

      Abrahamsen, A.B.; Magnusson, Niklas; Jensen, B.B.; Runde, Magne (Journal article; Peer reviewed, 2012)
      To realize large (>10 MW) direct-driven off-shore wind turbines, a number of steps are needed to reduce weight and cost compared to on-shore technologies. One of the major challenges is to provide drive trains which can ...
    • Testing av superledende spoler 

      Engebrethsen, Eivind (Master thesis, 2009)
      Tradisjonelle induksjonsovner bruker vekselstrøm for å indusere strømmer og varme opp større aluminiumsdeler. Effektiviteten til ovnene ligger normalt mellom 55-60%, noe som gir et stort forbedringspotensial. Ved å erstatte ...
    • Winding and Testing of Superconducting Coils 

      Eliassen, Jan Christian (Master thesis, 2015)
      Superconducting rotor windings are considered for future large offshore wind turbines for their low weight, volume and their possibility to reduce costs. In a joint European project, INNWIND.EU, a superconducting small ...