Title:
LAMINATED CORE
Document Type and Number:
WIPO Patent Application WO/2023/112418
Kind Code:
A1
Abstract:
Provided is a laminated core having good core loss characteristics. This laminated core is formed of a laminate of electromagnetic steel sheets processed to a predetermined shape, the electromagnetic steel sheets having an insulating coating on the surface thereof, wherein the frequency of occurrence (number/mm) of cracks penetrating through the insulating coating in a region of 100 μm or less from a processed end portion toward the center of the plate is less than or equal to 3.0 times the frequency of occurrence (number/mm) of cracks penetrating through the insulating coating in a region of greater than 100 μm and not greater than 500 μm from the processed end portion toward the center of the sheet.
Inventors:
OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
YOSHIZAKI SOUICHIRO (JP)
ICHIHARA YOSHIHISA (JP)
YOSHIZAKI SOUICHIRO (JP)
Application Number:
PCT/JP2022/035415
Publication Date:
June 22, 2023
Filing Date:
September 22, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
H01F27/245; C21D8/12; C22C38/00; C22C38/60; H01F1/147
Foreign References:
| JP2014023224A | 2014-02-03 | |||
| JP2011193622A | 2011-09-29 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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