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Title:
POWDER MAGNETIC CORE, AND ELECTROMAGNETIC COMPONENT
Document Type and Number:
WIPO Patent Application WO/2019/031209
Kind Code:
A1
Abstract:
A powder magnetic core comprises: a powder compact containing a soft magnetic powder; and an insulating resin coating film that covers a portion of the surface of the powder compact, wherein the ratio of the area of the insulating resin coating film with respect to the surface area of the powder compact is 85% or less, and the maximum depth of the recesses and projections of the insulating resin coating film surface is 20 µm or less.

Inventors:
SAITO Tatsuya (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
WATANABE Asako (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
UENO Tomoyuki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
Application Number:
JP2018/027436
Publication Date:
February 14, 2019
Filing Date:
July 23, 2018
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
SUMITOMO ELECTRIC SINTERED ALLOY, LTD. (2901, Nariwa Nariwa-cho, Takahashi-sh, Okayama 92, 〒7160192, JP)
International Classes:
H01F27/255; B22F3/00; B22F3/24; H01F1/22; H01F3/08; H01F41/02; H02K1/02
Domestic Patent References:
WO2012081737A12012-06-21
WO2005107039A12005-11-10
Foreign References:
JP2007215334A2007-08-23
JP2013143406A2013-07-22
JPH06327199A1994-11-25
JP2016127042A2016-07-11
JP2007224412A2007-09-06
JP2005295684A2005-10-20
JPH11341751A1999-12-10
JP2009044788A2009-02-26
JP2004242443A2004-08-26
Attorney, Agent or Firm:
NAKATA Motomi et al. (1-3, Shimaya 1-chome, Konohana-ku, Osaka-sh, Osaka 24, 〒5540024, JP)
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