US 12,266,460 B2
Magnetic core
Takahito Mizumura, Tokyo (JP); Masato Mizokami, Tokyo (JP); Fumiaki Takahashi, Tokyo (JP); and Hisashi Mogi, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
Filed on Nov. 28, 2023, as Appl. No. 18/521,221.
Application 18/521,221 is a continuation of application No. 17/282,291, granted, now 11,869,697, previously published as PCT/JP2019/039015, filed on Oct. 2, 2019.
Claims priority of application No. 2018-187341 (JP), filed on Oct. 2, 2018.
Prior Publication US 2024/0170196 A1, May 23, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 27/24 (2006.01); H01F 1/16 (2006.01); H01F 3/02 (2006.01); H01F 27/245 (2006.01); H01F 41/02 (2006.01)
CPC H01F 27/245 (2013.01) [H01F 1/16 (2013.01); H01F 3/02 (2013.01); H01F 41/0233 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A magnetic core in which
a first corner area and second corner area, and a third corner area and fourth corner area are respectively arranged at intervals in a first direction and
said first corner area and third corner area, and said second corner area and fourth corner area are respectively arranged at intervals in a second direction vertical to the first direction,
which magnetic core comprising
a first part having a plurality of soft magnetic sheets which are shaped respectively bent at positions corresponding to said first corner area and said second corner area and which plurality of soft magnetic sheets are stacked so that the sheet surfaces are superposed,
a second part having a plurality of soft magnetic sheets which are shaped respectively bent at positions corresponding to said third corner area and said fourth corner area and which plurality of soft magnetic sheets are stacked so that the sheet surfaces are superposed, and
a third part,
wherein
end parts in the longitudinal direction of said soft magnetic sheets forming said first part and end parts in the longitudinal direction of said soft magnetic sheets forming said second part being made to abut against each other in said second direction in state and the positions in the circumferential direction of said magnetic core of the locations of the abutting state being offset in said second direction,
the abutting state of the end parts in the longitudinal direction of said soft magnetic sheets forming said first part and end parts in the longitudinal direction of said soft magnetic sheets forming said second part in said second direction being held,
said third part being arranged at a window part comprised of a region at the inside of said first part and said second part,
at least part of a region of one end of said third part and at least part of a region of another end of said third part respectively made to contact an inner circumferential surface of said window part in said second direction, and
in a surface of said third part, there is a region in a state where said first part and said second part contacting an inner circumferential surface between said first corner area and said third corner area of, but there is no region in a state where said first part and said second part contact an inner circumferential surface between said second corner area and said fourth corner area.