64
Reducing Motor Noise or Leakage Current Using Carrier Fre-
quency Selection (n46)
Set the Inverter output transistor switching frequency (carrier fre-
quency).
If the set value is 7, 8, or 9, the carrier frequency will be multiplied by
the same factor as the output frequency.
Setting
Carrier Frequency
Metallic Noise
from Motor
Noise and Cur-
rent Leakage
7
12 fout (Hz)
8
24 fout (Hz)
9
36 fout (Hz)
1
2.5 (kHz)
2
5.0 (kHz)
3
7.5 (kHz)
4
10.0 (kHz)
Higher
Not
audible
Larger
Smaller
fc=12 fout
fc=24 fout
fc=36 fout
fout=Output Frequency
fout=Output Frequency
fout=Output Frequency
fc=Carrier Frequency
fc=Carrier Frequency
fc=Carrier Frequency
n46=7
n46=8
n46=9
2.5 kHz
1.0 kHz
2.5 kHz
1.0 kHz
83.3 Hz
208.3 Hz
41.6 Hz
104.1 Hz
2.5 kHz
1.0 kHz
27.7 Hz
69.4 Hz