Direct current voltage increment due to ac coupling in a high Tc superconducting coil

The voltage–current characteristics of a superconducting coil, made of multifilamentary silver-sheathed Bi2Sr2Ca2Cu3O10+δ tape, are investigated. We find that a small ac current Iac superimposed on a relatively large dc current Idc causes a significant increase in the coil dc voltage, approximately...

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Bibliographic Details
Published in:Applied physics letters 1998-12, Vol.73 (26), p.3932-3934
Main Authors: Shaked, N., Al-Omari, I. A., Friedman, A., Wolfus, Y., Sinvani, M., Shaulov, A., Yeshurun, Y.
Format: Article
Language:English
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Summary:The voltage–current characteristics of a superconducting coil, made of multifilamentary silver-sheathed Bi2Sr2Ca2Cu3O10+δ tape, are investigated. We find that a small ac current Iac superimposed on a relatively large dc current Idc causes a significant increase in the coil dc voltage, approximately proportional to Idc, Iac2, and the ac frequency. We attribute this effect to the nonlinear magnetoresistance of the coil, and discuss its significance in power applications of high Tc superconducting coils, such as fault current limiters and superconducting magnetic energy storage devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.122940