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FP2616-I-22 Datasheet(Hoja de datos) 6 Page - NEC

No. de Pieza. FP2616-I-22
Descripción  Ferrite Cores
Descarga  71 Pages
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Fabricante  NEC [NEC]
Página de inicio  http://www.nec.com/
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 6 page
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●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
●Please request for a specification sheet for detailed product data prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
9603FERVOL05E1001T0
Ferrite Cores VOL.05
6
Terms and Definitions
●Alternating current initial magnetic permeability
μi
At the initial magnetization curve's origin point, the magnetic
permeability of the magnetic core is used as shown in the formu-
la below.
μ
i =
Here
μ
0 : vacuum magnetic permeability
H : alternating current magnetic field strength (A/m)
B : alternating current magnetic flux density (T)
●Effective magnetic permeability
μ
e
In the magnetic core of a closed magnetic circuit (one in which
flux leakage can be ignored), this refers to the magnetic perme-
ability indicated in the following formula through the effective
self-inductance.
Here L : effective self-inductance (H)
N : Number of all windings
M: Magnetic path lengths (cm) of each of the same mate-
rials and same cross-section areas
A : Each of the cross-section areas (cm2)
μ : Each of the materials' magnetic permeabilities
Note : The first formula is used in measurement and the second
in calculating when the dimensions and magnetic permeabilities
of each part of the magnetic core are given.
●Effective saturation magnetic flux density Bms(G ; T)
This refers to the saturation magnetic flux density in actual use.
B10 : Bms with magnetic field 10 Oe (796A/m)
B15 : Bms with magnetic field 15 Oe (1194A/m)
●Effective saturation residual coercive force Brms(G ; T)
This refers to the magnetic flux density when the magnetic field
is removed from the condition of effective saturation magnetic
flux density.
●Effective saturation coercive force Hcms(Oe ; A/m)
When the magnetic field is removed from the condition of effec-
tive saturation magnetic flux density and further magnetized in
the opposite direction, this refers to the strength of the magnetic
field in which the magnetic flux becomes 0.
●Loss factor tan
δ
This refers to the hysteresis loss factor, vortex current loss fac-
tor and residual loss factor. The hysteresis loss coefficient
(h1),vortex current loss coefficient (e1) and residual loss coeffi-
cient (r1) are represented by the following formula.
B
H
lim
H
0
1
μ
0
m = tan m
B
m
θ
i = tan i
H
θ
i
μ
θ
μθ
Ba : saturation magnetic flux density
Bms : effective saturation magnetic flux density
Bm : maximum magnetic flux density
Brs : saturation residual magnetic flux density
Brms : effective saturation residual magnetic flux density
Br : residual magnetic flux density
B
Hcs : saturation coercive force
Hcms : effective saturation coercive force
Hc : coercive force
Hms : effective saturation magnetic field strength
Hm : maximum magnetic field strength
Bs
Bms
Brs
Bm
Br
Hcs
Hcms
Hc Hm
Hcms
Hms
H
H
Brms
Hc
μ
e =
L
×10 9
4
πN 2
R
A
μ
e =
R
A
/
R
μ A
フェライトコア5版_E 10.1.23 13:24 ページ 6




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