AC losses of filamentary HTS twisted filament round wires and flat tapes

• Published in: IEEE transactions on applied superconductivity Vol. 9; no. 2; pp. 789 - 792
• Main Authors: Darmann, F., Zhao, R., McCaughey, G., Apperley, M., Beales, T.P., Friend, C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.1999; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Australia; Bi-based cuprates; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cuprates superconductors (high tc and insulating parent compounds); Disturbances. Regulation. Protection; Electric connection. Cables. Wiring; Electric variables measurement; Electrical engineering. Electrical power engineering; Electrical power engineering; Electromagnetic properties; Exact sciences and technology; Filaments; High temperature superconductors; Hysteresis; Lead; Loss measurement; Low frequencies; MAGNETIC PROPERTIES; Manufacturing; Physics; Power networks and lines; PROPERTIES; SILVER ALLOYS (50 TO 99 AG); Silver base alloys; STACKS; Superconducting cables; Superconducting tapes; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TAPE; Testing. Reliability. Quality control; Various equipment and components; Voltage; WIRE; Wires; Hysteresis loss; Flat cable; Twisted cable; Tape; Leakage current; Experimental study; High temperature superconductor; Alternating current; Multifilamentary superconductor
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/77.783415

Samples of multifilamentary Bi-2223/Ag/alloy twisted filament tapes and Z stack round wires, consisting of untwisted and twisted stacks (or z-arrays) of flat filaments have been prepared. It was found that twist pitches of less than 10 mm may be incorporated into multifilament tapes while maintaining the Jc at 20 kA/cm/sup 2/. The self-field AC loss has been investigated at low frequencies up to 100 Hz. The round wire was found to exhibit isotropic electromagnetic properties.