Stability, Inter-Strand Contact Resistance and AC Losses in YBCO Roebel Cables

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Date

2013

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IEEE

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Abstract

A dc transport current was applied to the strands of a Roebel cable at 77 K in liquid nitrogen bath. The inter-strand contact resistance was measured. It was modified either by applying a pressure on the cable at 77 K in liquid nitrogen bath or using different soldering patterns between the strands of the cable. Magnetization ac losses were measured in frequency range 50 – 200 Hz in applied magnetic field 4 – 70 mT perpendicular to the broader face of the cable to test the inter-strand contact resistance effect. High stability and very low level of coupling losses was observed in the cables even with the lowest interstrand resistances.

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current sharing, roebel cable, stability

Citation

Published version: IEEE Transactions on Applied Superconductivity (Volume: 24, Issue: 3, June 2014) Article Sequence Number: 6600505. https://doi.org/10.1109/TASC.2013.2283472