US 12,191,071 B2
Wound magnetic core
Tsugitomo Nakada, Tokyo (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Filed by PROTERIAL, LTD., Tokyo (JP)
Filed on Jun. 7, 2023, as Appl. No. 18/330,568.
Application 18/330,568 is a division of application No. 17/210,714, filed on Mar. 24, 2021, granted, now 11,715,591.
Claims priority of application No. 2020-058481 (JP), filed on Mar. 27, 2020; and application No. 2021-028823 (JP), filed on Feb. 25, 2021.
Prior Publication US 2023/0317368 A1, Oct. 5, 2023
Int. Cl. H01F 7/06 (2006.01); H01F 1/153 (2006.01); H01F 1/24 (2006.01); H01F 3/08 (2006.01); H01F 27/25 (2006.01); H01F 41/02 (2006.01); H01F 41/068 (2016.01)
CPC H01F 41/0246 (2013.01) [H01F 1/15308 (2013.01); H01F 1/24 (2013.01); H01F 3/08 (2013.01); H01F 27/25 (2013.01); H01F 41/0226 (2013.01); H01F 41/068 (2016.01)] 5 Claims
OG exemplary drawing
 
1. A wound magnetic core in which a soft magnetic metal ribbon is wound, the wound magnetic core being such that:
the soft magnetic metal ribbon has an amorphous structure and/or a nanocrystalline structure;
a layer of an oxide of Fe derived from a metal making up the soft magnetic metal ribbon is present at a surface of the soft magnetic metal ribbon;
spaces between layers of the soft magnetic metal ribbon have a nonmagnetic insulating metal oxide powder in intervening fashion and are impregnated with a resin; and
a space factor of the wound magnetic core is not less than 65% but not greater than 75%.