6-8
B. Zero-phase noise filter (EMI SUPPESION ZERO CORE)
‧ Part Number: 4H000D0250001
‧ Choose the appropriate zero-phase noise filter based on different horsepower and
wire size of wiring.
‧ The high attenuation characteristic of zero-phase noise filter (in the amplitude
modulation range from 100KHz to 50MHz, there is very high attenuation, as shown
in the following figure), can be used to suppress effectively the radiation
interference to external generated by the inverter.
‧ Zero-phase noise filter can be used either at the inverter input or output side. Wires
for each phase can be winded in the same direction in application. The more the
number of winding lap is, the better the performance is. If the wire diameter is too
big, which results in winding failure, the wires for each phase can run through
directly in the same direction, connecting several zero-phase noise filters in series
at the same time.
‧ Attenuation characteristic (at 10 laps)
10
1
10
2
10
3
10
4
10
-4 0
-3 0
-2 0
-1 0
0
頻 率 (k H z)
衰 減 值 (dB)
‧
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