| 摘要 |
There is provided a superconductive cable wherein an efficiency of an electric power transmission is increased to a maximum and the superconductive cable is miniaturized by strengthening a longitudinal magnetic field in a superconductive material. A superconductive cable 1, which transmits an electric power by using superconductive material, includes a conductive portion 4 that is constructed by superconductive members spirally arranged at either a positive angle or a negative angle with respect to a standard direction defined as a longitudinal direction of the superconductive cable, and is characterized by the fact that the conductive portion 4 is composed of a plurality of layers, that the spiral angles in the respective layers are different from each other to the standard direction in order from an innermost layer 2 toward an outermost layer 3, and that magnetic fields are produced by electric currents flowing into the conductive portion 4 in the same direction as a direction in which the electric currents flow. |
