Disclosed is an AC oxide superconductor round wire including a metal matrix, and a plurality of superconductor filaments embedded in the metal matrix, wherein the superconductor filaments are twisted at a twist pitch L.sub.p satisfying the following relation....http://www.google.es/patents/US5929385?utm_source=gb-gplus-sharePatente US5929385 - AC oxide superconductor wire and cable
