LAMINATED IRON CORE - JFE STEEL CORP

Title:

LAMINATED IRON CORE

Document Type and Number:

WIPO Patent Application WO/2023/112419

Kind Code:

A1

Abstract:

Provided is a laminated iron core with good iron loss characteristic.　A laminated iron core of the present invention is formed by laminating electromagnetic steel sheets processed into a predetermined shape and has a butt portion where the processed surfaces of the electromagnetic steel sheets are butted against each other, and in the electromagnetic steel sheets, the surface area ratio of the region having an arithmetic mean roughness (Ra) of 5 μm or less is 90% or more of the entire processed surface.

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Inventors:

OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
YOSHIZAKI SOUICHIRO (JP)

Application Number:

PCT/JP2022/035416

Publication Date:

June 22, 2023

Filing Date:

September 22, 2022

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

H01F27/245; C21D8/12; C22C38/00; C22C38/60; H01F1/147

Domestic Patent References:

WO2018012599A1

2018-01-18

Foreign References:

JP2019176560A

2019-10-10

Attorney, Agent or Firm:

KUMASAKA Akira et al. (JP)

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