Expressions To Calculate Measurement Values - Iwatsu SY-8218 Instruction Manual

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2.2 Expressions to calculate measurement values

● The following is explanation of expressions to calculate values measured by this product.
This product uses two measurement modes of Normal mode and
calculation mode.
The calculation difference point of Normal mode and μ mode is the following. In μ mode, the complex permeability from fundamental wave
element of intensity of the magnetic field H and magnetic flux density B is calculated. In Normal mode, the value which is not calculated by using
them is calculated. Refer to the following expressions for details

Units in [ ] are typical. The symbol to which
Calculation
modes
Expressions used by this product to calculate each value shown in Table 2-1 are as follows:
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Hm, Hc, Bm, Br, μ , Br/Bm, 2Φm
a
For symbols, see Figure 2-3.
 
H
 m
H
m
2
 
B
 m
B
m
2
 
H
c

H
c
2
 
B
r

B
r
2
Table 2-1 Calculation modes and measurement values
* adheres is calculated from the fundamental wave element.
Normal mode
Typical
Symbol
unit
Pcv [W/m 3 ] Core loss per volume
Pcm [W/kg] Core loss per mass
θ [deg] Phase angle
μ Relative permeability
－
a
Max. magnetic flux
Bm [T]
density
V m [V] Max. induced voltage
2
Residual magnetic flux
Br [T]
density
Hm [A/m] Max. magnetic field
Hc [A/m] Coercive force
Pc [W] Core loss
VA [VA] Apparent power
I m [A] Max. exciting current
1
Rectangular ratio
Br/Bm
－
Total flux linkage
2Φm [Wb]
－ －
－ －

H
(2.3)
m

B
(2.4)
m

H
(2.5)
c
(2.6)

B
r
and Table 2-1 shows measurement values displayed in each
μ mode,
Typical
Meaning Symbol
Bm
V m
2
Hm [A/m]
I m
1
μ
a
＊
L
＊ R
＊ |Z|
Pc
＊ μ'
＊
μ"
＊ μ
z
[deg]
＊ θ
＊ Q
－ ＊ tanδ
THD
－
H
m
8
B-H ANALYZER SY-8218 / SY-8219
μ mode
Meaning
unit
Max. magnetic flux
[T]
density
[V] Max. induced voltage
Max. magnetic field
[A] Max. exciting current
－ Relative permeability
[H] Inductance
[Ω] Resistance
[Ω] Impedance
[W] Core loss
Complex permeability
－
(real part)
Complex permeability
－
(imaginary part)
Impedance permeability
－
Phase angle
Quality coefficient
－
－ Loss coefficient
[dB] Total harmonic distortion
B
m
B
r
H
H
c
c
B
r
B
m
Fig.2-3 Hm, Hc, Bm, Br, μa
μ
ａ
H
m