B-H ANALYZER SY-8218
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4.2 Calculation of sample constants
●
If a sample constant required for measurement is not attached to the sample, use the following calculation expression to obtain an approximate
constant. For details, see JIS standard and the like.
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Toroidal core
For a toroidal core with the shape shown in Fig.4-2, use the following
calculation expression to obtain the sample constant:
Effective length of magnetic path:
(4.1)
Effective net core area:
(4.2)
Effective volume:
(4.3)
Mass:
(4.4)
Fig.4-2 Toroidal core
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EI core
For an EI core with the shape shown in Fig.4-3, use the calculation
expression to obtain the sample constant:
Effective length of magnetic path:
(4.5)
Effective net core area:
(4.6)
Effective volume:
(4.7)
Mass:
(4.8)
Fig.4-3 EI core
D: Outer diameter
d: Inner diameter
Le: Effective length of
magnetic path
Ae: Effective net core area
Ρ
:
Density
h
:
Height
2
D
d
L
e
2
h
d
D
A
e
e
e
e
A
L
V
e
e
V
W
L
e
Ｄ
d
A
e
h
ρ
: Density
h: Height
f
e
d
c
b
a
L
e
2
2
h
d
A
e
e
e
e
A
L
V
e
e
V
W
a
b
c
d
e
f
h
Cross section
Cross section
Содержание SY-8218
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