Title:
WOUND CORE
Document Type and Number:
WIPO Patent Application WO/2022/102224
Kind Code:
A1
Abstract:
Provided is a wound core in which a non-heat-resistant magnetic domain refining member is used for at least a portion of a raw material that constitutes the wound core, the wound core being exceptional in terms of the iron-loss-reducing effect. The wound core has a planar section and a corner part adjacent to the planar section. The planar section has a lap part, and the corner part has a bent part. A non-heat-resistant magnetic domain refining member is used for at least a portion of the raw material that constitutes the wound core. In the non-heat-resistant magnetic domain refining member is formed a closure domain extending in a direction that crosses the longitudinal direction. The longitudinal-direction cross-section area of the closure domain exceeds 7500 µm2. In the lap part, the ratio of the number of lap junctions having a lap margin of 3.0-30 mm (inclusive) to the total number of lap junctions is 50% or greater.
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Inventors:
OMURA TAKESHI (JP)
INOUE HIROTAKA (JP)
SENDA KUNIHIRO (JP)
INOUE HIROTAKA (JP)
SENDA KUNIHIRO (JP)
Application Number:
PCT/JP2021/032260
Publication Date:
May 19, 2022
Filing Date:
September 02, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
H01F30/10; H01F27/245
Domestic Patent References:
| WO2019151399A1 | 2019-08-08 | |||
| WO2018131613A1 | 2018-07-19 |
Foreign References:
| JP2000260631A | 2000-09-22 | |||
| JP2018148036A | 2018-09-20 |
Other References:
See also references of EP 4199015A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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