Design of double helix conductors for superconducting ac power transmission

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7361924

Garber, M; Bussiere, J F; Morgan, G H

Coaxial cable conductors in the form of helical tape windings have been proposed in order to make Nb/sub 3/Sn cables which have flexibility and the ability to take up thermal contraction. For ac power transmission the axial magnetic fields which occur in a simple helical construction produce a number of undesirable consequences. It has been shown that these problems can be avoided by using double layer windings of opposite helicity, with 45/sup 0/ as the optimum helix angle. However, smaller values than this are desirable for mechanical reasons, and this paper extends the theory to include pitch angles less than 45/sup 0/. Measurements on short cable models are shown to be in reasonable agreement with calculation. The effect of current flow around the superconductor tape edges, which occurs in helical windings, is analyzed and it is shown that appreciable ac loss can arise if laminated tape with non-superconductive edges is used indiscriminately.

• Research Organization: Brookhaven National Lab., Upton, N.Y. (USA)
• OSTI ID: 7361924
• Report Number(s): BNL-21338; CONF-760619-1
• Country of Publication: United States
• Language: English

Related Subjects

200303* -- Power Transmission & Distribution-- Superconducting & Cryogenic Systems-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
36 MATERIALS SCIENCE
360100 -- Metals & Alloys
420201 -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AC SYSTEMS
ALLOYS
CABLES
CONDUCTOR DEVICES
CONFIGURATION
DESIGN
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
HELICAL CONFIGURATION
NIOBIUM ALLOYS
POWER SYSTEMS
SUPERCONDUCTING CABLES
TIN ALLOYS