Alternating field losses in superconducting wires carrying dc transport currents. Part 2: multifilamentary composite conductors

✍ Scribed by T Ogasawara; Y Takahashi; K Kanbara; Y Kubota; K Yasohama; K Yasukochi

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 404 KB
• Volume: 21
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(81)90056-4

✦ Synopsis

Investigations of transient field losses in multifilamentary composite conductors carrying dc transport currents, I, are presented. As shown previously, the total loss is best characterized by a normalized transport current i = I/Ic and a dimensionless field-change rate = rBe/Bp, where r is the relaxation time of the coupling current and Bp is the fullpenetration field of a sofid conductor equivalent to the multifilamentary composite. For ~ ~ 1, the composite conductor behaves fike a solid conductor and a saturation effect occurs in both the magnetization and the ac losses. The characteristic feature of the composite appears for ~ ~ 1, and the total losses for transport currents below i < Iare almost independent of i. Beyond the limit given, losses rise sharply. Experimental results over a wide range of the field change rate and the transport-current level agree sufficiently with the calculations.