US 12,261,482 B2
Laminated core and electric motor
Ryu Hirayama, Tokyo (JP); and Kazutoshi Takeda, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/294,202
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Dec. 17, 2019, PCT No. PCT/JP2019/049294
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/129942, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-235857 (JP), filed on Dec. 17, 2018.
Prior Publication US 2022/0014051 A1, Jan. 13, 2022
Int. Cl. H02K 1/16 (2006.01); H01F 27/245 (2006.01); H02K 1/14 (2006.01); H02K 15/02 (2006.01)
CPC H02K 1/165 (2013.01) [H01F 27/245 (2013.01); H02K 1/146 (2013.01); H02K 15/024 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A laminated core comprising:
a plurality of electrical steel sheets stacked on each other; and
a plurality of adhesion parts provided between the electrical steel sheets adjacent to each other in an axial direction thereof and adhering the electrical steel sheets to each other,
wherein each of the electrical steel sheets includes an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, and
each of the tooth parts of the electrical steel sheets includes an adhesion region provided with one of said adhesion parts, each said adhesion part forming a band extending in the circumferential direction, and
wherein the adhesion parts are located only on the tooth portion for controlling a uniform distribution of magnetic flux density flowing within the laminated core.