Reducing Motor Noise Or Leakage Current Using Carrier Frequency Selection (N46) - YASKAWA VS mini J7 Series Instruction Manual

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