Magnetic core including magnet for magnetic bias and...

Details Magnetic core including magnet for magnetic bias and... Magnetic core including magnet for magnetic bias and...

2005-06-14

2005-06-14

Nguyen, Tuyen T. (Department: 2832)

Inductor devices

With permanent magnet

C336S083000, C336S178000, C336S233000

Reexamination Certificate

active

06906608

ABSTRACT:
An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 μm in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 Ω·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 μm or less, and an average particle diameter of 2.0 to 50 μm m and coated with inorganic glass, and the rare-earth magnet powder is selected from the group consisting of a Sm—Co magnet powder, Nd—Fe—B magnet powder, and Sm—Fe—N magnet powder.

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