Yaskawa VS mini J7 Series - Manual (Page 79)

79
Set inverter output transistor switching frequency (carrier frequency).
Setting values 7, 8, or 9 provides a synchronous carrier frequency that changes with
output frequency as follows.
Reducing motor noise leakage current (n46)
Setting Carrier Frequency (kHz)
Audible Noise
from Motor
RFI Noise and
Current 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
Smaller
Larger