FM25G142MYBPF Hitachi Metals, Ltd, FM25G142MYBPF Datasheet - Page 19

• Manufacturer Part Number: FM25G142MYBPF
• Description: Three-phase Fm-a Coils
• Manufacturer: Hitachi Metals, Ltd

Features for cores made of "FT-3KL"
The cores made of FT-3KL with high saturation-field property have the following advantages:
1) High saturation-field and low residual magnetic flux
–0.5
–1.0
–1.5
1.5
1.0
0.5
0.0
density in B-H curve
–80
The cores have excellent DC superposed characteristics
due to its high permeability and high saturation-field
property in B-H curve (Figure 54, 55).
The cores can suppress surge current with high volt-second
due to high maximum induction swing (ΔBm) resulting
from low residual magnetic flux density (Figure 56).
For safety and the proper usage, you are requested to approve our product specifications or to transact the approval sheet for product specifications before ordering.
This catalog and its contents are subject to change without notice.
Figure 56. Maximum induction swing, Δ Bm
–40
Figure 54. DC-BH Curves
B s
B r
Ｈ ｍ （A/m）
Ｈ ｍ （A/m）
0
FT-3KM
FT-3KL
Mn-Zn Ferrite
ΔB m=Bs-Br
40
ΔB m
80
2) High impedance over wide frequency range.
1000
0.01
100
0.1
10
100000
1
10000
10
Figure 55. DC superposed characteristics of impedance
These cores have excellent performance in noise
reduction in wide frequency range from conduction noise
to radiation noise. In particular, these cores show high
performance in noise reduction at 1MHz-100MHz due to
higher impedance than other materials (Figure 57).
1000
Figure 57. Frequency dependence of impedance
0
permeability, μrz
100
10
Frequency (kHz)
Bias field （A/m）
20
1000
FT-3KM
FT-3KL
Mn-Zn Ferrite
Ni-Zn Ferrite
30
10000
FT-3KM
FT-3KL
Mn-Zn Ferrite
40
f=100kHz
100000
50
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