A high temperature superconducting Roebel winding cable for high current and strong magnetic field

Abstract

The invention discloses a high-temperature superconducting Roebel winding cable for a high-current and a high-intensity magnetic field. The high-temperature superconducting Roebel winding cable is characterized in that a plurality of grooves are axially formed on the outer surface of an internal supporting structure, a plurality of windings are respectively embedded in the grooves of the internalsupporting structure, and an armor layer and an insulating layer sequentially sleeve outside the internal supporting structure; the windings are two stacks of Roebe structures, the stacks are composedof a plurality of high-temperature superconducting strips, and the two stacks of high-temperature superconducting strips are transported mutually to form the the windings of the Roebe structures. According to the present invention, firstly, the complete transposition of the strips is ensured at the aspect of a mechanical structure, so that the C axes of the windings and the C axes of the stripsare completely aligned in direction, and the mechanical stress of the windings in a large-current and complex magnetic field environment is reduced due to the existence of the supporting structure; and secondly, the alternating current loss and the interlayer eddy current loss of the conductor in an excitation and alternating current working environment are effectively reduced, and the quench riskof a superconducting conductor is reduced at the same time.

Description

technical field [0001] The invention relates to the high-temperature superconducting technical field, in particular to a high-temperature superconducting Roebel winding cable for large current and strong magnetic field. Background technique [0002] Large-aperture high-field superconducting magnets, especially fusion reactor tokamak superconducting magnets, need to carry high currents under high magnetic field backgrounds. The ability of traditional low-temperature superconducting materials to carry current under high magnetic fields is difficult to meet the working requirements of next-generation tokamak superconducting magnets. Such as low temperature superconducting material Nb 3 For Sn wire, the current-carrying capacity of the material will be severely reduced under a magnetic field above 15 T. High-temperature superconducting tape, because of its stronger current-carrying capacity, higher critical magnetic field and critical temperature, is replacing traditional low-...

AI Technical Summary

Problems solved by technology

However, at present, the Roebel winding cable based on high-temperature superconducting tape is still in the design experiment stage, and the quality of the winding and cable structure design will have an important impact on the subsequent design of high-current, high-intensity and complex magnetic fields

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