US 12,126,217 B2
Core block, laminated core, and electric motor
Ryu Hirayama, Tokyo (JP); and Kazutoshi Takeda, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/606,036
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Jun. 22, 2020, PCT No. PCT/JP2020/024389
§ 371(c)(1), (2) Date Oct. 24, 2021,
PCT Pub. No. WO2020/262298, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-118337 (JP), filed on Jun. 26, 2019.
Prior Publication US 2022/0209592 A1, Jun. 30, 2022
Int. Cl. H02K 1/18 (2006.01); H01F 3/02 (2006.01); H01F 27/245 (2006.01); H01F 27/26 (2006.01)
CPC H02K 1/185 (2013.01) [H01F 3/02 (2013.01); H01F 27/245 (2013.01); H01F 27/263 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block comprising:
a plurality of electrical steel sheet pieces stacked to each other; and
an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other,
wherein the electrical steel sheet pieces comprises an arc-shaped stator yoke part and a tooth part that protrudes from the stator yoke part to one side in a radial direction of the stator yoke part,
wherein the adhesion part includes
a pair of first portions that extend along peripheral edges on both sides of the tooth part in a circumferential direction;
a pair of third portions that extend from base ends of the first portions to both sides in the circumferential direction along a peripheral edge on the one side in the radial direction of the stator yoke part; and
a fourth portion that extends in the circumferential direction along a peripheral edge on another side of the stator yoke part in the radial direction, and
wherein an adhesion area ratio of each of the electrical steel sheet pieces by the adhesion part is 1% or more and 60% or less.