Reducing Motor Noise Or Leakage Current - YASKAWA VS-606V7 Series Instruction Manual

Reducing motor noise or leakage current (n080)
Set inverter output transistor switching frequency (carrier frequency).
Setting Carrier Frequency (kHz)
7
12 fout
8
24 fout
9
36 fout
1
2.5
2 5.0
3 7.5
4 10.0
Setting values 7, 8, or 9 multiplies output frequency according to output
frequency value.
n080=7
fc=12 fout
n080=8
fc=24 fout
n080=9
fc=36 fout
Metallic Noise
from Motor
(Hz)
(Hz)
Higher
(Hz)
(kHz)
Not
(kHz)
audible
(kHz)
(kHz)
fc=CARRIER FREQUENCY
2.5kHz
1.0kHz
83.3Hz
fc=CARRIER FREQUENCY
2.5kHz
1.0kHz
41.6Hz
fc=CARRIER FREQUENCY
2.5kHz
1.0kHz
27.7Hz
Noise and Current
Leakage
Smaller
Larger
fout=OUTPUT FREQUENCY
208.3Hz
fout=OUTPUT FREQUENCY
104.1Hz
fout=OUTPUT FREQUENCY
69.4Hz
67