Demonstration of a Practical Nb3Sn Coil for an Actively-Shielded Generator
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
This paper describes a detailed design of a 6 Tesla
Nb3Sn superconducting racetrack coil designed for conduction
cooling. We then describe a bench test pursued as a proof of
concept for one winding of an actively-shielded, air core electric
machine with superconducting field windings. Electromagnetic
design selection is drawn from previous optimization work. The
coil former design is then discussed. Numerical simulations
of thermal and structural features are pursued to determine
temperature distribution and strain within the winding. Coil
instrumentation and experimental setup of a quasi-conduction
cooled system is described. Finally, test results are presented;
a maximum critical current of 480 A was reached at a peak
temperature of 7.9 K, surpassing the operational current goal of
435 A. Future work and planned improvements to the test setup
are discussed.
Description
Keywords
AC Machines, rotating machines, superconducting coils
Citation
Published version: IEEE Transactions on Applied Superconductivity (Volume: 27, Issue: 4, June 2017) Article Sequence Number: 5201307. https://doi.org/10.1109/TASC.2017.2652840