An experimental assessment of rotor superconducting stack demagnetization in a liquid nitrogen environment
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Authors
Mineev, N
Glowacki, Bartek
Reis, T
Publication Date
2019-07-08Journal Title
Superconductor Science and Technology
ISSN
0953-2048
Publisher
IOP Publishing
Volume
32
Issue
8
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Smara, A., Mineev, N., Climente-Alarcon, V., Patel, A., Baskys, A., Glowacki, B., & Reis, T. (2019). An experimental assessment of rotor superconducting stack demagnetization in a liquid nitrogen environment. Superconductor Science and Technology, 32 (8)https://doi.org/10.1088/1361-6668/ab20bf
Abstract
Stacks of high temperature superconducting tape have proved to trap in laboratory conditions levels of magnetic flux density one order of magnitude above actual state-of-the-art permanent magnets. Their simple manufacturing, high mechanical properties and intrinsic resistance to sudden quench greatly facilitate their utilization in industrial applications, amongst them, as source of magnetic flux density in the rotor of electrical machines. For this to happen, the currents induced in the superconducting layers of the stack must not be disturbed during operation. This work studies in experimental conditions the demagnetization of a stack rotating in the airgap of an electrical motor under slot and winding induced cross-field components, whose values are estimated via conventional 2-D finite element analysis. The results are congruent with previous laboratory studies and show small long-term demagnetization rates that may allow operation for time spans longer than initially established.
Sponsorship
EPSRC grant EP/P000738/1
Funder references
European Commission Horizon 2020 (H2020) Societal Challenges (723119)
EPSRC (EP/P000738/1)
Identifiers
External DOI: https://doi.org/10.1088/1361-6668/ab20bf
This record's URL: https://www.repository.cam.ac.uk/handle/1810/292763
Rights
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