AC transport losses in Ag sheathed (Bi,Pb)(2)Sr2Ca2Cu3Ox tapes

被引:19
作者
Oota, A [1 ]
Fukunaga, T [1 ]
Ito, T [1 ]
机构
[1] GIFU TECH COLL,GIFU 50104,JAPAN
来源
PHYSICA C | 1996年 / 270卷 / 1-2期
关键词
Bi2223; Ag-sheathed tape; multifilamentary tape; twist; AC transport losses; self-fields;
D O I
10.1016/0921-4534(96)00485-6
中图分类号
O59 [应用物理学];
学科分类号
摘要
The AC transport losses under self-fields have been investigated at 77 K on the Ag sheathed (Bi,Pb)(2)Sr2Ca2Cu3Ox 19-filamentary untwisted and twisted (with a pitch of 13 mm) tapes, in comparison with the monofilamentary tape. The resistive voltages on the untwisted and twisted tapes show a dependence on the voltage-taps configuration, which is found in the monofilamentary tape. The AC transport losses per cycle for the tapes are nearly independent of frequency between 10 and 1000 Hz, so that the main contribution to the losses comes from the hysteresis loss of superconductor in the same way as the monofilamentary tape. The twist of superconductor filaments causes no notable influence on the loss behaviors, and the results are explained by the theory of Norris for an elliptical superconductor with the same critical current, independent of whether or not the filaments are twisted. It is suggested that the distribution of transport currents in the filaments is not equalized in the twisted tape.
引用
收藏
页码:107 / 113
页数:7
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