Danfoss VLT HVAC Basic Drive FC 101 Design Manual page 37

Product Overview
I [%]
out
110%
100%
80%
60%
40%
20%
2 4 6 8 10
Illustration 3.49 37 kW (50 hp), 400 V, Enclosure Size I6, IP54
I [%]
out
110%
100%
80%
60%
40%
20%
2 4 6 8
Illustration 3.50 45–55 kW (60–74 hp), 400 V, Enclosure Size I7,
IP54
I [%]
out
110%
100%
80%
60%
40%
20%
2 4 6 8
Illustration 3.51 75–90 kW (100–120 hp), 400 V, Enclosure Size
I8, IP54
If the motor or the equipment driven by the motor - for
example, a fan - makes noise or vibrations at certain
frequencies, configure the following parameters or
parameter groups to reduce or eliminate the noise or
vibrations:
MG18C702
Design Guide
40 o C
45 C
o
50 C
o
f [kHz]
sw
12
40 o C
45 o C
50 o
C
f [kHz]
sw
10 12
40 o C
45 o C
50 o C
f [kHz]
sw
10 12
Danfoss A/S © 04/2016 All rights reserved.
•
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-link coils.
•
Integral fan.
•
RFI filter choke.
Enclosure size
H1
H2
H3
H4
H5
H6
H7 67.5 (75 kW (100 hp) 71.5 dB)
H8
H9
H10
I2
I3
I4
I6
I7
I8
Table 3.3 Typical Values Measured at a Distance of 1 m (3.28 ft)
from the Unit
The frequency converter has been tested according to the
procedure based on the shown standards, Table 3.4.
The frequency converter complies with the requirements
that exist for units mounted on the walls and floors of
production premises, and in panels bolted to walls or
floors.
IEC/EN 60068-2-6 Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64 Vibration, broad-band random
Table 3.4 Standards
A frequency converter contains many mechanical and
electronic components. All are to some extent vulnerable
to environmental effects.
3
Level [dBA]
57.3
59.5
53.8
64
63.7
71.5
73.5
60
62.9
50.2
54
60.8
70
62
65.6
35
3