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Patent Searching and Data


Title:
IRON CORE FOR TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2019/189857
Kind Code:
A1
Abstract:
The present invention reduces vibration of an iron core and ameliorates the noise of a transformer. An iron core for a transformer, said iron core having a plurality of oriented electromagnetic steel sheets laminated therein, wherein in at least one of the oriented electromagnetic steel sheets, (1) the oriented electromagnetic steel sheet has a region in which a closure domain is formed in a direction intersecting a rolling direction, and a region in which a closure domain is not formed, and (2) the area ratio R of a region with regard to the entire oriented electromagnetic steel sheet is 0.10-30%, said region experiencing, when excited in the rolling direction at a maximum magnetic flux density of 1.7T and a frequency of 50Hz, at least 2×10-7 less shrinkage at a maximum displacement point than the shrinkage of the region in which a closure domain is not formed.

Inventors:
OMURA Takeshi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
INOUE Hirotaka (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
OKABE Seiji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2019/014271
Publication Date:
October 03, 2019
Filing Date:
March 29, 2019
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
H01F27/245; H01F1/16; C21D8/12; H01F41/02
Foreign References:
JP2003034822A2003-02-07
JPS60114519A1985-06-21
Attorney, Agent or Firm:
SUGIMURA Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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