Investigation of demagnetization in HTS stacked tapes implemented in electric machines as a result of crossed magnetic field

M. Baghdadi, H. S. Ruiz, J. F. Fagnard, M. Zhang, W. Wang, T. A. Coombs

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This paper investigates the practical effectiveness of employing superconducting stacked tapes to superconducting electric machinery. The use of superconducting bulks in various practical applications has been addressed extensively in the literature. However, in practice, dramatic decrease in magnetization would occur on superconducting bulks due to the crossed field effect. In our study, we employed the superconducting stacked tapes in a synchronous superconducting motor, which was designed and fabricated in our laboratory, aiming to lessen demagnetization due to crossed field effect in comparison with superconducting bulks. Applying the transverse AC field, the effects of frequency, amplitude, and number of cycles of the transverse magnetic field are discussed. Furthermore, a stack of 16 layers of superconducting tapes is modelled and the consequences of applying the crossed magnetic field on the sample are evaluated. The confrontation between experiments and simulation allows us to thoroughly understand the crossed field effects on stacked tapes. At the end, a preventive treatment, based on the shielding characteristic of superconductor and materials with high permeability, i.e. μ-metal and metalic glass, is suggested. On the other hand, the shielding feature of aforementioned materials will hinder the penetration of magnetic field and, consequently, reduction of the demagnetization will be attained.

LanguageEnglish
Article number6602404
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - 1 Jun 2015

Fingerprint

Superconducting tapes
Demagnetization
Electric machinery
demagnetization
crossed fields
Tapes
tapes
Magnetic fields
Shielding
magnetic fields
shielding
Superconducting materials
Magnetization
machinery
Metals
Glass
alternating current
permeability
penetration
magnetization

Keywords

  • demagnetization
  • superconducting motor
  • superconducting stacked tapes
  • transverse magnetic field

Cite this

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abstract = "This paper investigates the practical effectiveness of employing superconducting stacked tapes to superconducting electric machinery. The use of superconducting bulks in various practical applications has been addressed extensively in the literature. However, in practice, dramatic decrease in magnetization would occur on superconducting bulks due to the crossed field effect. In our study, we employed the superconducting stacked tapes in a synchronous superconducting motor, which was designed and fabricated in our laboratory, aiming to lessen demagnetization due to crossed field effect in comparison with superconducting bulks. Applying the transverse AC field, the effects of frequency, amplitude, and number of cycles of the transverse magnetic field are discussed. Furthermore, a stack of 16 layers of superconducting tapes is modelled and the consequences of applying the crossed magnetic field on the sample are evaluated. The confrontation between experiments and simulation allows us to thoroughly understand the crossed field effects on stacked tapes. At the end, a preventive treatment, based on the shielding characteristic of superconductor and materials with high permeability, i.e. μ-metal and metalic glass, is suggested. On the other hand, the shielding feature of aforementioned materials will hinder the penetration of magnetic field and, consequently, reduction of the demagnetization will be attained.",
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Investigation of demagnetization in HTS stacked tapes implemented in electric machines as a result of crossed magnetic field. / Baghdadi, M.; Ruiz, H. S.; Fagnard, J. F.; Zhang, M.; Wang, W.; Coombs, T. A.

In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 6602404, 01.06.2015.

Research output: Contribution to journalArticle

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