Design improvements to a three-material passive magnetic current limiter

Authors
Calman, S Dawson, FP Yamada, S Iwahara, M
Citation
S. Calman et al., Design improvements to a three-material passive magnetic current limiter, IEEE MAGNET, 37(4), 2001, pp. 2624-2626
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
00189464 → ACNP
Volume
37
Issue
4
Year of publication
2001
Part
1
Pages
2624 - 2626
Database
ISI
SICI code
0018-9464(200107)37:4<2624:DITATP>2.0.ZU;2-7
Abstract
This paper shows that flux nonuniformity in a passive magnetic fault curren t limiter softens the transition characteristics from the saturated to the unsaturated state. Soft transition characteristics lead to higher core loss es and a derating in the maximum nominal operating current. Flux uniformity is improved by using a combination of extended magnets and an anisotropic saturable core. The use of distributed permanent magnets or an extended mag net leads to larger differential inductance ratios.