Wound magnetic core
First Claim
Patent Images
1. A wound magnetic core constituted by (a) thin ribbon made of fine crystalline, soft magnetic Fe-base alloy having the composition represented by the general formula:
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space="preserve" listing-type="equation">(Fe.sub.1-a M.sub.a).sub.100-x-y-z-α
Cu.sub.x Si.sub.y B.sub.z M'"'"'.sub.α
wherein M is Co and/or Ni, M'"'"' is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and a, x, y, z and α
respectively satisfy 0≦
a≦
0.5, 0.1≦
x≦
3, 0≦
y≦
30, 0≦
z≦
25, 5≦
y+z≦
30, 0.1≦
α
≦
30, at least 50% of the alloy structure being occupied by fine crystal grains having an average grain size of 1000 Å
or less; and
(b) a heat-resistant insulating layer having a thickness of 0.5-5 μ
m formed on at least one surface of said thin ribbon, said heat-resistant insulating layer being made of a uniform mixture of 20-90 weight %, as SiO2, of a silanol oligomer and 80-10 weight % of fine ceramic particles, in which said thin ribbon having said heat-resistant insulating layer formed on at least one surface of said thin ribbon has been wound and then has been subjected to a heat treatment to cross-link said silanol oligomer.
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Abstract
A wound magnetic core constituted by (a) a thin ribbon made of a fine crystalline, soft magnetic Fe-base alloy having the composition represented by the general formula:
(Fe.sub.1-a M.sub.a).sub.100-x-y-z-α Cu.sub.x Si.sub.y B.sub.z
M'"'"'.sub.α
wherein M is Co and/or Ni, M'"'"' is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and a, x, y, z and α respectively satisfy 0≦a≦0.5, 0.1≦x≦3, 0≦y≦30, 0≦z≦25, 5≦y+z≦30 and 0.1≦α≦30, at least 50% of the alloy structure being occupied by fine crystal grains having an average grain size of 1000 Å or less; and (b) a heat-resistant insulating layer having a thickness of 0.5-5 μm formed on at least one surface of the thin ribbon, the heat-resistant insulating layer being made of a uniform mixture of 20-90 weight %, as SiO2, of a silanol oligomer and 80-10 weight % of fine ceramic particles, which is subjected to a heat treatment to cross-link the silanol oligomer.
11 Citations
8 Claims
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1. A wound magnetic core constituted by (a) thin ribbon made of fine crystalline, soft magnetic Fe-base alloy having the composition represented by the general formula:
-
space="preserve" listing-type="equation">(Fe.sub.1-a M.sub.a).sub.100-x-y-z-α
Cu.sub.x Si.sub.y B.sub.z M'"'"'.sub.αwherein M is Co and/or Ni, M'"'"' is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and a, x, y, z and α
respectively satisfy 0≦
a≦
0.5, 0.1≦
x≦
3, 0≦
y≦
30, 0≦
z≦
25, 5≦
y+z≦
30, 0.1≦
α
≦
30, at least 50% of the alloy structure being occupied by fine crystal grains having an average grain size of 1000 Å
or less; and
(b) a heat-resistant insulating layer having a thickness of 0.5-5 μ
m formed on at least one surface of said thin ribbon, said heat-resistant insulating layer being made of a uniform mixture of 20-90 weight %, as SiO2, of a silanol oligomer and 80-10 weight % of fine ceramic particles, in which said thin ribbon having said heat-resistant insulating layer formed on at least one surface of said thin ribbon has been wound and then has been subjected to a heat treatment to cross-link said silanol oligomer. - View Dependent Claims (2, 3, 4)
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5. A wound magnetic core constituted by (a) thin ribbon made of fine crystalline, soft magnetic Fe-base alloy having the composition represented by the general formula:
-
space="preserve" listing-type="equation">(Fe.sub.1-a M.sub.a).sub.100-x-y-z-α
-β
-γ
Cu.sub.x Si.sub.y B.sub.z M'"'"'.sub.α
M".sub.β
X.sub.γwherein M is Co and/or Ni, M'"'"' is at least one element selected from the group consisting of Mb, W, Ta, Zr, Hf, Ti and Mo, M" is at least one element selected from the group consisting of V, Cr, Mn, Al, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, α
, β and
γ
respectively satisfy 0≦
α
≦
0.5, 0.1≦
x≦
3, 0≦
y≦
30, 0≦
z≦
25, 5≦
y+z≦
30, 0.1≦
α
≦
30, β
≦
10 and γ
≦
10, at least 50% of the alloy structure being occupied by fine crystal grains having an average grain size of 1000 Å
or less; and
(b) a heat-resistant insulating layer having a thickness of 0.5-5 μ
m formed on at least one surface of said thin ribbon, said heat-resistant insulating layer being made of a uniform mixture of 20-90 weight &
, as SiO2, of a silanol oligomer and 80-10 weight % of fine ceramic particles, in which said thin ribbon having said heat-resistant insulating layer formed on at least one surface of said thin ribbon has been wound and then has been subjected to a heat treatment to cross-link said silanol oligomer. - View Dependent Claims (6, 7, 8)
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Current AssigneeHitachi Metals (Thailand) Ltd.
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Original AssigneeHitachi Metals (Thailand) Ltd.
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InventorsArakawa, Shunsuke, Hirao, Noriyoshi, Yamauchi, Kiyotaka
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Primary Examiner(s)Sheehan, John P.
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Application NumberUS07/473,476Time in Patent Office677 DaysField of Search336/213, 336/214US Class Current336/213CPC Class CodesH01F 1/15383 Applying coatings thereon H...H01F 3/04 made from strips or ribbonsH01F 41/0226 from amorphous ribbonsY10T 29/49071 by winding or coiling
