US 12,255,505 B2
Method for manufacturing motor core
Souichiro Yoshizaki, Tokyo (JP); Kunihiro Senda, Tokyo (JP); Yoshiaki Zaizen, Tokyo (JP); and Yukino Miyamoto, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/611,781
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed May 15, 2020, PCT No. PCT/JP2020/019494
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2020/241315, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-099169 (JP), filed on May 28, 2019.
Prior Publication US 2022/0239202 A1, Jul. 28, 2022
Int. Cl. H02K 15/02 (2006.01); H02K 1/02 (2006.01); H02K 1/04 (2006.01)
CPC H02K 15/02 (2013.01) [H02K 1/02 (2013.01); H02K 1/04 (2013.01); Y10T 29/49009 (2015.01)] 8 Claims
OG exemplary drawing
 
1. A method for manufacturing a motor core, comprising:
a step of manufacturing a motor core by performing melt-cutting on an electrical steel sheet using heat input from a surface, the electrical steel sheet having an average thermal conductivity in depth positions from the surface to one-third depth of a sheet thickness lower than a thermal conductivity in a middle position in a sheet thickness direction by 30% or greater.