8.3 Acoustic Noise or Vibration
If the compressor or the equipment driven by the
compressor - for example, a fan - is making noise or
vibrations at certain frequencies, configure the following
parameters or parameter groups to reduce or eliminate the
noise or vibrations:
•
Parameter group
4-6* Speed Bypass
.
•
Set
parameter 14-03 Overmodulation
to
[0] Off
.
•
Switching pattern and switching frequency
parameter group
14-0* Inverter Switching
.
•
Parameter 1-64 Resonance Dampening
.
The acoustic noise from the frequency converter comes
from 3 sources:
•
DC intermediate circuit coils
•
Integral fan
•
RFI filter choke
Enclosure
Level [dBA]
H3
53.8
H4
64
H5
63.7
Table 8.3 Typical Values Measured at a Distance of 1 m
from the Unit
General Specifications
VLT
®
Compressor Drive CDS 803
74
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MG18N202
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