Title:
WOUND CORE AND WOUND CORE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/007952
Kind Code:
A1
Abstract:
Provided is a wound core for achieving low transformer iron loss and having excellent magnetic characteristics without the use of two or more kinds of raw materials of different magnetic characteristics. This wound core: is formed from a grain-oriented electromagnetic steel sheet as a raw material; has planar sections and corner sections adjoining the planar sections; has a lap part in the planar sections; has bent parts in the corner sections; and in a side view, the ratio (outer perimeter/inner perimeter) between the outer and inner perimeters thereof is 1.80 or less. The grain-oriented electromagnetic steel sheet has a magnetic flux density B8 of 1.84 T to 1.91 T at a magnetic field intensity H of 800 A/m and has an iron loss deterioration rate of 1.50 or less under a predetermined compressive stress.
Inventors:
INOUE HIROTAKA (JP)
OMURA TAKESHI (JP)
SENDA KUNIHIRO (JP)
OMURA TAKESHI (JP)
SENDA KUNIHIRO (JP)
Application Number:
PCT/JP2022/023038
Publication Date:
February 02, 2023
Filing Date:
June 08, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/12; C22C38/60; H01F27/245; H01F41/02
Domestic Patent References:
| WO2019009311A1 | 2019-01-10 |
Foreign References:
| JP2020150089A | 2020-09-17 | |||
| JP2011162829A | 2011-08-25 | |||
| JPH08273918A | 1996-10-18 | |||
| JPS6253579B2 | 1987-11-11 | |||
| JP2895670B2 | 1999-05-24 | |||
| JP5286292B2 | 2013-09-11 | |||
| JP2006185999A | 2006-07-13 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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