| 摘要 |
<p>A superconducting cable for alternating current, comprising conductor layers (6) formed by a plurality of tape-shaped superconducting wires (5) wound around a center member 1, an electric insulating layer (3) formed outside the conductor layers (6), and a plurality of shielding layers 4 formed outside the insulating layer (3), wherein (a) the conductor layers (6) are formed, where N is a number of layers in the conductor layers (6) and expressed by an integer, by gradually increasing a winding pitch of conductor layers in the same direction from an inner first layer to an N/2 layer when the number of layers is even, or from an inner first layer to a (N-1)/2 layer when the number of layers is odd, and then by gradually decreasing a winding pitch of conductor layers (6) in an opposite direction to the inner layers from a N/2+1 layer to an N layer when the number of layers is even, or from a (N+1)/2 layer to an N layer when the number of layers is odd; and (b) the shielding layers (8) are formed, where n is the number of layers in the shielding layers (8) and expressed by an integer, by gradually increasing a winding pitch of shielding layers (8) in the same direction from an inner first layer to an n/2 layer when the number of layers is even, or from an inner first layer to a (n-1)/2 layer when the number of layers is odd, and then by gradually decreasing the winding pitch of shielding layers (8) in an opposite direction to the inner layers from a n/2+1 layer to an n layer when the number of layers is even, or from a (n+1)/2 layer to an n layer when the number of layers is odd. <IMAGE></p> |
