Title:
LAMINATED CORE, METHOD OF PRODUCING SAME, AND ROTATING ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/129948
Kind Code:
A1
Abstract:
This laminated core is provided with: a plurality of magnetic steel plates that are laminated to each other, and in which both surfaces of each steel plate is covered by an insulating film; and bonding parts that are provided between adjacent magnetic steel plates in the lamination direction, and that bond the magnetic steel plates. An adhesive forming the bonding parts includes a first phase and a second phase. The bonding parts have a sea-island structure comprising the first phase, which serves as a sea structural part, and the second phase, which serves as an island structural part. The first phase contains an epoxy resin, an acrylic resin, and a curing agent, and has an SP value of 8.5 to 10.7 (cal/cm3)1/2. The second phase contains an elastomer and has an SP value of 7.5 to 8.4 (cal/cm3)1/2.
Inventors:
TAKATANI SHINSUKE (JP)
FUJII HIROYASU (JP)
TAKEDA KAZUTOSHI (JP)
FUJII HIROYASU (JP)
TAKEDA KAZUTOSHI (JP)
Application Number:
PCT/JP2019/049312
Publication Date:
June 25, 2020
Filing Date:
December 17, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
H02K1/18; H01F27/24; H01F27/245; H01F41/02; H02K15/02
Domestic Patent References:
| WO2019188284A1 | 2019-10-03 |
Foreign References:
| JP2017011863A | 2017-01-12 | |||
| JP2010004716A | 2010-01-07 | |||
| JP2001115125A | 2001-04-24 | |||
| JP2017005906A | 2017-01-05 | |||
| JPH03247683A | 1991-11-05 | |||
| JP4143090B2 | 2008-09-03 | |||
| JPS63207639A | 1988-08-29 | |||
| JPS60170681A | 1985-09-04 | |||
| JP2003206464A | 2003-07-22 | |||
| JP2011195735A | 2011-10-06 | |||
| JPH07118620A | 1995-05-09 | |||
| JP2018235868A | 2018-12-17 | |||
| JP2011023523A | 2011-02-03 |
Other References:
See also references of EP 3902107A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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