Title:
MAGNETIC CORE FOR CURRENT TRANSFORMER, CURRENT TRANSFORMER AND WATTHOUR METER
Document Type and Number:
WIPO Patent Application WO/2006/064920
Kind Code:
A1
Abstract:
A magnetic core for a current transformer, which comprises an alloy having a composition represented by the general formula: Fe100-x-a-y-cMxCuaM’yX’c (atomic %), wherein M is Co and/or Ni, M’ is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Ta and W, X’ is Si and/or B, and x, a, y and c are numbers satisfying 10 ≤ x ≤ 50, 0.1 ≤ a ≤ 3, 1 ≤ y ≤ 10, 2 ≤ c ≤ 30 and 7 ≤ y + c ≤ 31, respectively, and having a structure comprising crystal grains having an average grain diameter of 50 nm or less.
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Inventors:
YOSHIZAWA YOSHIHITO (JP)
NAOE MASAMU (JP)
NAOE MASAMU (JP)
Application Number:
PCT/JP2005/023181
Publication Date:
June 22, 2006
Filing Date:
December 16, 2005
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
YOSHIZAWA YOSHIHITO (JP)
NAOE MASAMU (JP)
YOSHIZAWA YOSHIHITO (JP)
NAOE MASAMU (JP)
International Classes:
H01F1/14; C22C38/00; H01F38/28
Foreign References:
| JP2004353090A | 2004-12-16 | |||
| JP2000252111A | 2000-09-14 | |||
| JP2004218037A | 2004-08-05 | |||
| JP2000119821A | 2000-04-25 | |||
| JPH03271346A | 1991-12-03 | |||
| JPH0950907A | 1997-02-18 | |||
| JP2001155946A | 2001-06-08 | |||
| JP2001052933A | 2001-02-23 |
Other References:
See also references of EP 1840906A4
Attorney, Agent or Firm:
Takaishi, Kitsuma (67 Kagurazaka 6-chom, Shinjuku-ku Tokyo 25, JP)
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