Patent ID: 11869697
Assignee: NIPPON STEEL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
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,
said third part is bent at positions corresponding to said first corner area, said second corner area, said third corner area, and said fourth corner area,
an outer circumferential surface of said third part is arranged in a state contacting inner circumferential surfaces of said first part and said second part,
said third part has a plurality of soft magnetic sheets stacked so that the sheet surfaces are superposed over each other,
end parts in the longitudinal directions of said soft magnetic sheets forming said third part are made to abut against in said second direction at only one position of a position between said first corner area and said third corner area and a position between said second corner area and said fourth corner area in state, and
the positions in the circumferential direction of said magnetic core of the locations where the end parts in the longitudinal directions of the plurality of said soft magnetic sheets forming said third part are made to abut against each other in said second direction are offset in said second direction.