| 摘要 |
PURPOSE:To prevent a magnetic path length from becoming long and the area of crossing magnetic fluxes from being narrowed by composing leads of a metal board and a thin superconducting film. CONSTITUTION:A rotor 8 is formed by obliquely winding leads 2 as an armature winding in a cylindrical state, and fixing it with epoxy resin. On the other hand, a permanent magnet 4 is disposed as a stator field inside the rotor 8. Here, leads 9 are formed of a metal board 13 formed of a conductor, and a thin superconducting film 10 in which one or more layers of rare earth metal or transition metal are deposited on one side face of the board 13. Thus, the magnetic flux which passes the current path formed of the leads is scarcely affected by the influence of Meissner effect to prevent the magnetic path length from becoming long and the area of crossing magnetic fluxes from being narrowed. |
