HTS transposed cable conductor and round shape strand

Bi-2223 round shaped strands were developed for realizing a HTS transposed cable conductor. The maximum critical current density (J(c)) of a short sam ple was 3.2 x 10(8) A/m(2) without external magnetic field at 77 K, and the J(c) of 50 m class long length strands was 1.6 x 10(8) A/m(2) at the same condition. We prepared subcables consisted of the round shape strands. Usin g subcables, a HTS transposed conductor was fabricated, and investigated th e DC and AC performance. The conductor I-c was 900 A as 10(-4) V/m (77 K, 0 T) criterion. Measured AC loss was compared with the theoretical loss cons idering of the magnetic field distribution and J(c)-B dependence of the str and. It was confirmed that the experimental and theoretical values were nea rly identical. (C) 2001 Elsevier Science B.V. All rights reserved.