To provide a superconductivity current limiter which returns quickly to a superconducting state and in which the evaporation amount of a refrigerant is small by suppressing the generation of Joule heat at a quench.
In this superconductivity current limiter, at both ends of a noninductively wound coil 5 which is formed, in such a way that a superconducting wire 1 is folded back from the intermediate part 2, and that both sides of the folded back part is coil-wound in the same direction, a conductive pipe 10a as a first terminal and a conductive pipe 10b as a second terminal are connected to a power circuit 12a and a power circuit 12b. A superconducting conductor 8 at one end of the superconducting wire 1 is connected to the outer face of the conductive pipe 10a, and a non-superconducting conductor 9 is pulled out through the inside of the conductive pipe 10a to be connected to the power circuit 12b. In addition, a superconducting conductor 8' at the other end of the superconducting wire 1 is connected to the outer face of the conductive pipe 10b, and a non-superconducting conductor 9' is pulled out through the inside of the conductive pipe 10b so as to be connected to the power circuit 12a. As a result, current at a quench is prevented from flowing into the part of the superconducting wire which constitutes the noninductive wound coil 5.
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MORIAI HIDESUMI
ENDO TAKESHI
