SUPERCONDUCTIVE CABLE (VARIANTS)

摘要

The group of utility models relates to the field of superconductor technology and power engineering and can be used in creating superconductive cables. The technical result of the group of utility models is an increase in the current-carrying capacity of a cable with no reduction in the environmental safety thereof. Variants of the superconductive cable comprise two, three or four conductors with annular cross-sections, said conductors being made of the same superconductive material and being positioned coaxially, the external radii of said conductors being linked by relationships, provided in the description, which include the parameter gamma, defined as limited to a value between 0 and 1, said value being dependent on the electromagnetic characteristics of the conductor material. Moreover, adjacent conductors of said cable are meant for the passage of opposing currents, the intensities of which currents are set to be such that the induction value on the outer boundary of the cable cross-section is close to zero. For all variants of the cable this value can be determined by means of approximating the j c (B) characteristic of the conductor material (as provided by the factory/manufacturer in the specifications for the given material or as ascertained experimentally) by means of relationship (I), where j c is the average density of the critical current in the conductor material, B is the magnetic induction, and alpha is the Lorentz force criterion for a high temperature superconductor, provided in the conductor material specifications, on the basis of which the conductor material is made.