Title:
THREE-PHASED THREE-LEGGED WOUND CORE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/167015
Kind Code:
A1
Abstract:
Provided is a three-phased three-legged wound core that has a reduced transformer core loss and exhibits excellent magnetic properties without using two or more kinds of materials having different magnetic properties. The three-phased three-legged wound core comprises two adjacent inner cores that are each composed of a grain-oriented electrical steel sheet as the raw material, and one outer core that surrounds the two inner cores, wherein: each of the two inner cores and the one outer core has a flat surface portion and a corner portion adjacent to the flat surface portion, the flat surface portion having a lap portion and the corner portion having a bend portion, the corner portions of the two inner cores and the one outer core each having bend portions at two locations, the bend portions at the two locations forming an angle of more than or equal to 30°; and the grain-oriented electrical steel sheet has a magnetic flux density B8 of 1.84T to 1.92T, inclusive, when the strength H of the magnetic field is 800 A/m.
Inventors:
INOUE HIROTAKA (JP)
OMURA TAKESHI (JP)
SHIMIZU KENKI (JP)
OMURA TAKESHI (JP)
SHIMIZU KENKI (JP)
Application Number:
PCT/JP2023/005715
Publication Date:
September 07, 2023
Filing Date:
February 17, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
H01F27/245; C21D8/12; C22C38/00; C22C38/60; H01F1/147; H01F41/02
Domestic Patent References:
| WO2020071512A1 | 2020-04-09 |
Foreign References:
| JP2018157142A | 2018-10-04 | |||
| JP2019087619A | 2019-06-06 | |||
| JP2018198258A | 2018-12-13 | |||
| US6473961B1 | 2002-11-05 | |||
| JP2022027234A | 2022-02-10 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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