Patent ID: 7678174
Filing Date: 2010-03-16
Classification: B22F,H01F

Abstract:
1. A compressed powder magnetic core comprising a soft magnetic material and manufactured by compacting the soft magnetic material, wherein the soft magnetic material comprises: an iron-based powder that has an insulating coating on its surfaces; and at least 1 type of wax that comprises an ester wax; wherein the soft magnetic material comprises at least 0.02% by weight and no more than 0.6% by weight of said wax that comprises said ester wax, wherein the average particle size of said wax that comprises said ester wax is at least 0.5 μm and no more than the average particle size of said iron based powder that has said insulating coating, and wherein, the wax that comprises said ester wax is interposed between particles of the iron based powder.