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A design of magnetic shielding for a superconducting magnetically levitated train
Author(s) -
Sasakawa Takashi,
Tagawa Naoto,
Herai Toshiki,
Nagashima Ken,
Fujiwara Shunsuke
Publication year - 1998
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19980715)124:1<42::aid-eej6>3.0.co;2-k
Subject(s) - electromagnetic shielding , magnetic flux , magnetic field , shield , magnet , superconducting magnet , magnetic levitation , train , magnetic circuit , superconductivity , permeability (electromagnetism) , materials science , electromagnet , electrodynamic suspension , mechanical engineering , electrical engineering , magnetic energy , condensed matter physics , physics , engineering , magnetization , geology , petrology , genetics , cartography , quantum mechanics , membrane , biology , geography
For EDS‐type magnetically levitated trains, magnetic shielding of stray fields produced by superconducting magnets is an important task. We seek the “optimal” thickness distribution (configuration) of magnetic material, which is the lightest and keeps the magnetic field at tolerable levels in the vehicle. In many cases, trial‐and‐error methods have been adopted for this purpose. In this paper, we propose a new method for preliminary design of the magnetic shielding. In this method, we simplify the magnetic shielding problem, assuming infinite permeability of the magnetic material, and calculate the magnetic flux going into or out of the shield surface. In this case, we can design an optimal magnetic shield (distribution and configuration of the magnetic material) and know the minimum weight of the magnetic shielding. We finally present an example of the magnetic shielding designed by this method and investigate its characteristics in a magnetically levitated train. © 1998 Scripta Technica, Electr Eng Jpn, 124(1): 42–54, 1998