TECO A510s - Input or Output Noise Filter (EMI Suppression Zero Phase Core); Frequency Attenuation Characteristics (10 Windings Case); Example of EMI Suppression Zero Phase Core Application

11-10
B. Input or Output Noise Filter (EMI Suppression Zero Phase Core)
- Part Number: 4H000D0250001
- Select a matched ferrite core to suppress EMI noise according to the required power rating and
wire size.
- The ferrite core can attenuate high frequencies in the range of 100 kHz to 50 MHz, as shown in
figure 11.4.1 below, and therefore should minimize the RFI generated by the inverter.
- 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 wound by following the same convention and in
one direction. The more turns without resulting in saturation the better the attenuation. If the wire
size is too large to be wound, all the wiring can be grouped and put through several cores together
in one direction.
10
1
10
2
10
3
10
4
1
0
-40
-30
-20
-10
0
Interference Frequency (kHz)
att euat oi n val ue (dB)
Attenuation (dB)
Fig. 11.4.1 Frequency attenuation characteristics (10 windings case)
Fig. 11.4.2 Example of EMI Suppression Zero Phase Core Application
Note: All the wiring of phases U/T1, V/T2, W/T3 must pass through the same zero-phase core without crossing over.
Induction Motor
Ground
Ground