1-27
B.
EMI SUPPRESSION ZERO PHASE CORE
•
Model : JUNFOC046S
－－－－－－－
•
Code No. : 4H000D0250001
•
According to the required power rating and wire size, select the matched ferrite core to
suppress EMI noise.
•
The ferrite core can attenuate the frequency response at high frequency range (from
100KHz to 50MHz, as shown below). It should be able to attenuate the RFI from
inverter to outside.
•
The zero-sequence noise ferrite core can be installed either on the input side or on the
output side. The wire around the core for each phase should be winded by following
the same convention and one direction. The more winding turns the better attenuation
effect. (Without saturation). If the wire size is too big to be winded, all the wire can be
grouped and go through these several cores together in one direction.
•
Frequency attenuation characteristics (10 windings case)
10
1
10
2
10
3
10
4
10
5
-40
-30
-20
-10
0
Interference Frequency (kHz)
at
teuat
oi
n v
al
ue (
dB
)
Example: EMI suppression zero phase core application example
PRGM
DIGITAL OPERATOR JNEP-31
DRIVE FWD REV REMOTE
DRIVE
EDIT
ENTER
RESET
FWD
REV
DSPL
JOG
RUN
STOP
Note: All the line wire of U/T1, V/T2, W/T3 phase must pass through the same zero-
phase core in the same winding sense.
