Patent ID: 9147514
Filing Date: 2015-09-29
Classification: H01F,Y10T

Abstract:
1. A wire-wound inductor comprising: a core member having a pillar-shaped core and a pair of flange parts provided on both sides of the core; a coil conductive wire wound around the core of the core member; a pair of terminal electrodes provided on an outer surface of the flange parts and connected to both ends of the coil conductive wire; and an insulation member covering an outer periphery of the coil conductive wire; wherein the core member is constituted by soft magnetic alloy grains, where each soft magnetic alloy grain has an oxidized layer on its surface, and the grains are bonded together by the oxidized layers so as to structure the core member; wherein the core member contains chromium by 2 to 15 percent by weight; wherein the core member has a saturated magnetic flux density of 1.2 T or more, magnetic permeation ratio of 10 or more, and height dimension of 1.5 mm or less; and wherein the insulation member is constituted by a resin material containing soft magnetic alloy grains as magnetic powder and has a magnetic permeation ratio of 1 to 25, wherein the wire-wound inductor has a direct current superimposition value (Idc) which is between 2 A and 4 A as measured when an inductance value (L value) is between 2 μH and 5 μH.