| 摘要 |
PURPOSE:To make the development of winding disorder causing fine movement difficult very much, by providing switch elements where a superconducting wire is wound into a limited number of layers at each spool end assembling a plurality of the elements in a bundle so that respective axes are not overlapped and they become in parallel one another. CONSTITUTION:Seven pieces of switch elements like bars having each round cross section with respect to each axis are packed into a bundle and are connected in parallel. Seven pieces of the switch elements 1 have the same forms and dimensions. At the winding pad of superconducting wires 6, required lengths of the wires are wound by lessening the number of layers on one hand and by increasing rows of winding in the axis direction on the other hand. Round cross section which is vertical with respect to each axis of respective switch elements allows spools 4 or outside covers 5 to be processed in a lathe and facilitates manufacturing of the elements. Further, a limited number of the layers at the winding part of the superconducting wires makes the development of winding disorder difficult. Accordingly, the fine movement of superconducting wires due to winding disorder as well as transition from superconductivity to normal conductivity with the movement of the superconducting wires are overcome and a permanent current switch may exhibit a stable performance. Further, as the switch elements having the same forms are connected in parallel, only a limited number of the spare switch elements are required for replacing or repairing elements. |
