Thermo-electromagnetic stability of ultrafine multifilamentary superconducting wires for 50-60 Hertz use

Conference · Tue Feb 28 23:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:5969752

Fevrier, A; Gueraud, A; Tavergnier, J P; Laumond, Y; Lacaze, A

The development of ultrafine multifilamentary superconducting wires with greatly reduced AC losses, has created many prospective electrical engineering uses of superconductors in machines, for which electromagnetic shields are no longer necessary. For such uses of these multifilamentary wires the superconducting NbTi filaments are embedded in a resistive matrix of CuNi. This leads to the problem of thermo-electromagnetic stability, which depends strongly on the critical current density and the distribution of the current within the wire, resulting mainly from self field effects. As the electromagnetic diffusivity is much higher than the thermal diffusivity the stability is governed by an adiabatic criterion. In this article the authors present calculations of the theoretical thermoelectromagnetic stability of cabled conductors. These calculations take into account the self field effect of the transport current. They then present a comparison of the theoretical and experimental results for conductors comprising typically of several hundred thousand 0.17 /mu/m diameter filaments. These results demonstrate the validity of the choice of stability criterion and the authors' theoretical approach.

• Research Organization: Labs. de Marcoussis, Marcoussis (FR); 0226000
• OSTI ID: 5969752
• Report Number(s): CONF-880812-
• Journal Information: IEEE Trans. Magn.; (United States), Journal Name: IEEE Trans. Magn.; (United States) Vol. 25:2; ISSN IEMGA
• 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
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CABLES
CALCULATION METHODS
CONDUCTOR DEVICES
COPPER ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
DATA
DESIGN
ELECTRIC CABLES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETISM
ENGINEERING
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
MAGNETIC SHIELDING
MAGNETISM
MATERIALS
MATRIX MATERIALS
NICKEL ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
PERFORMANCE TESTING
PHYSICAL PROPERTIES
SHIELDING
STABILITY
SUPERCONDUCTING CABLES
SUPERCONDUCTING WIRES
TESTING
THEORETICAL DATA
TITANIUM ALLOYS
WIRES