Inductor devices – With permanent magnet
Patent
1998-11-06
2000-12-12
Gellner, Michael L.
Inductor devices
With permanent magnet
335306, 336175, 336 83, 336212, H01F 2100
Patent
active
061604658
ABSTRACT:
A soft magnetic core is substantially cylindrical and a linear-shaped coil conductor is inserted through a hole in the central portion of the soft magnetic core. A hard magnetic material sheet has areas which are magnetized in a thickness direction thereof and the areas are arranged in strips so that a magnetization direction of adjacent strips is mutually opposite. The hard magnetic material is wound on the outside surface of the soft magnetic core and is fixed to the soft magnetic core. The direction of the areas formed as strips of the hard magnetic material is substantially perpendicular to the axial direction of the coil conductor.
REFERENCES:
patent: 3721189 (1973-03-01), Bray
patent: 4621416 (1986-11-01), Krause et al.
patent: 5347255 (1994-09-01), Saitoh et al.
patent: 5694030 (1997-12-01), Sato et al.
Murata Satoshi
Sakamoto Yukio
Sugitani Masami
Yamada Tatsuyuki
Yamaguchi Kouichi
Gellner Michael L.
Murata Manufacturing Co. Ltd.
Nguyen Tuyen T.
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