Eddy current loss reduction of superconducting magnets for MAGLEV with a multilayer superconducting sheet

Author

Arata, M. ; Kawai, M. ; Yamashita, T. ; Fujita, M. ; Hamajima, T. ; Sanada, Y. ; Miura, A. ; Yamaguchi, M. ; Yamaji, M. ; Terai, M. ; Inadama, S.

Author_Institution

Toshiba Corp., Yokohama, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

912

Lastpage

915

Abstract

Superconducting conductors and magnets used in the fields of power transmission, generators, MRI, MAGLEV etc. experience AC magnetic fields causing heat generation in the magnets´ structure and AC losses in the superconductors. Therefore, AC magnetic shields with wide frequency range in high magnetic fields are desirable to reduce heat generation within the cryogenic region and increase system efficiency. This paper describes the performance of a multilayer superconducting sheet as an AC magnetic field shield, eddy current analysis of MAGLEV coil and eddy current loss measurement of an R&D cryostat with a superconducting magnet. Eddy current loss was reduced to about one fourth of the loss level without a superconducting shield.

Keywords

eddy current losses; loss measurement; magnetic levitation; magnetic shielding; superconducting coils; superconducting magnets; AC losses; AC magnetic field shield; MAGLEV coil; cryostat; eddy current analysis; eddy current loss measurement; heat generation; multilayer superconducting sheet; superconducting magnets; AC generators; Conductors; Eddy currents; Magnetic field measurement; Magnetic levitation; Magnetic shielding; Power generation; Superconducting coils; Superconducting magnets; Superconducting transmission lines;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614652

Filename

614652