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Title:
MAGNETIC CORE UNIT, CURRENT TRANSFORMER, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/155514
Kind Code:
A1
Abstract:
A magnetic core unit provided with: a wound magnetic core including a wound nanocrystalline alloy ribbon; a case having a space corresponding to the outer shape of the wound magnetic core, the wound magnetic core being housed in the space; and an adhesive disposed between the bottom surface of the space and the lamination surface of the wound magnetic core, the adhesive bonding the wound magnetic core and the bottom surface to each other. The nanocrystalline alloy ribbon has a saturation magnetostriction greater than 1 ppm, and when the permeability measured at temperature T°C in a state in which an AC magnetic field having a frequency of f = 50 Hz and an amplitude of H = 1.0 A/m (ampere per meter) is applied to the wound magnetic core bonded to the case is expressed as μunit(T), the permeability μunit(25) is equal to or greater than 400,000, and formulae 1 and 2 are satisfied. (Formula 1): -0.28 ≦ (μunit(100) - μunit(25))/μunit(25)≦ 0.1 (Formula 2): -0.28 ≦ (μunit(-25) - μunit(25))/μunit(25) ≦ 0

Inventors:
HAGIWARA KAZUHIRO
Application Number:
PCT/JP2018/006308
Publication Date:
August 30, 2018
Filing Date:
February 21, 2018
Export Citation:
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Assignee:
HITACHI METALS LTD (JP)
International Classes:
C21D6/00; H01F1/153; C22C1/00; C22C38/00; C22C45/02; H01F27/24; H01F41/02
Domestic Patent References:
WO2010081993A12010-07-22
Foreign References:
JPH0885821A1996-04-02
JPH0729814U1995-06-02
JPH08339932A1996-12-24
JP2004327779A2004-11-18
JPH03107417A1991-05-07
JPH03107417A1991-05-07
JP2000328206A2000-11-28
JPH0969443A1997-03-11
Other References:
See also references of EP 3588518A4
Attorney, Agent or Firm:
OKUDA Seiji (JP)
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