A High-Power Superconducting DC Cable

Residual magnetic field profiles and their current density profiles of coated conductors for fast and slow cut-off current operations

“…Big difference of sheet current density at the edges of the conductor leads to the difference of residual magnetic field at the edges between fast and slow operations. From the calculated sheet current density for each sub-element, the induced total current I total can be estimated by (4) The induced total current is about 12.5 A for fast operation on contrary to 1.5 A for slow operation. Through the measured residual magnetic field and the analysis of the current density, we speculates that the quality in the tapes from the current cut off operations is needed to be considered in the cable applications.…”

“…As for a power cable system, high current is required for more than 10 kA [4]. Therefore, the magnetic field effects become significant which might affect the performance of HTS tapes themselves inside the cable [5].…”

Application of High <i>T</i>_c Superconductor in Accelerators: Status and Prospects

“…They are made from Bi-2223 or Y-123 tape, and are usually designed for operating at high voltage in AC mode, with sub-cooled liquid nitrogen cooling. It is interesting to note that although, due to AC losses, DC would appear to be more appropriate for large-scale transport of high power over long distances 45) , there is only sparse attention being paid to the development of such cable. In a superconducting accelerator, electrical connections between magnets and/or between current leads and magnets are presently made with Nb-Ti wires or cables.…”

dc Josephson Current Between an Isotropic and a d-Wave or Extended s-Wave Partially Gapped Charge Density Wave Superconductor

“…Namely, features (i) and (ii) indicated above made it possible to manufacture large-scale power cables, fly-wheel energy storage devices, bearings, high field magnets, fault current limiters, superconductor-based transformers, levitated trains, motors and power generators [84][85][86][87][88][89][90][91][92][93]. At the same time, the Josephson (weak-coupling) feature (iii) became the basis of small-scale superconducting electronics [88,[94][95][96][97][98], which also uses the emergence of half-integer magnetic flux quantization in circuits with superconducting currents [99,100].…”