US 12,445,000 B2
Magnetic core and magnetic component
Munemitsu Abe, Miyagi-ken (JP); Akio Hanada, Niigata-ken (JP); Shokan Yamashita, Niigata-ken (JP); and Tatsuya Oba, Miyagi-ken (JP)
Assigned to DELTA ELECTRONICS (JAPAN), INC., Tokyo (JP)
Filed by DELTA ELECTRONICS (JAPAN), INC., Tokyo (JP)
Filed on Feb. 22, 2023, as Appl. No. 18/172,550.
Application 18/172,550 is a continuation of application No. PCT/JP2021/032516, filed on Sep. 3, 2021.
Claims priority of application No. 2020-151208 (JP), filed on Sep. 9, 2020.
Prior Publication US 2023/0208219 A1, Jun. 29, 2023
Int. Cl. H02K 1/22 (2006.01); H02K 1/12 (2006.01); H02K 15/02 (2006.01)
CPC H02K 1/22 (2013.01) [H02K 1/12 (2013.01); H02K 15/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A magnetic core comprising:
a core assembly including a plurality of thin strip blocks assembled together, each of the thin strip blocks being a laminated body formed of a plurality of nanocrystalline thin strips laminated along a lamination direction,
wherein the plurality of nanocrystalline thin strips are made of a nanocrystal-containing material having a bcc-Fe phase as a main phase,
wherein each of the plurality of thin strip blocks includes:
fixing portions in which the plurality of nanocrystalline thin strips are joined to each other in the lamination direction, such that the fixing portions electrically connect the plurality of the nanocrystalline thin strips within the thin strip blocks, while the plurality of the thin strip blocks are electrically separated from each other,
and wherein the nanocrystalline thin strip positioned at a center portion of the thin strip block in the lamination direction has an iron loss smaller than an iron loss of the nanocrystalline thin strip positioned at a surface of the thin strip block.