Patent ID: 6791446
Filing Date: 2004-09-14
Classification: H01F

Abstract:
An inductance component comprising:a magnetic core comprising ferrite and forming a magnetic circuit having a magnetic gap; an exciting coil wound around said magnetic core; and a permanent magnet disposed in said magnetic gap and having a greater sectional area than said magnetic core; wherein said permanent magnet comprises: at least one resin selected from polyamide imide resin, polyimide resin, epoxy resin, polyphenylene sulfide resin, silicone resin, polyester resin, aromatic polyamide resin, and liquid crystal polymer; and rare earth magnet powder dispersed in said at least one resin, said rare earth magnet powder having an intrinsic coercive force of at least 10 kOe, a Tc of at least 500Â° C., and an average particle size of approximately 2.5-25 &mgr;m, and being coated with at least one metal selected from Zn, Al, Bi, Ga, In, Mg, Pb, Sb, and Sn or alloy thereof, and wherein said resin has a content of at least 30% in volumetric ratio and a specific resistance of at least 0.1 &OHgr;cm.