Option
Name
Description
[7]
5.0 kHz
Default switching frequency for 0.25–3.7 kW [0.34–5 hp], 200 V, and 0.37–7.5 kW [0.5–10 hp], 400 V.
[8]
6.0 kHz
[9]
7.0 kHz
[10]
8.0 kHz
[11]
10.0 kHz
[12]
12.0 kHz
[13]
14.0 kHz
[14]
16.0 kHz
Parameter 14-03 Overmodulation
Table 477: Parameter 14-03 Overmodulation
14-03 Overmodulation
Default Value: Size related
Parameter Type: Option
Setup: All set-ups
Conversion Index: -
Data Type: Uint8
Change during operation: False
N O T I C E
Overmodulation leads to increased torque ripple as harmonics increase.
Op-
tion
Name Description
[0]
Off
Select
[0] Off
for no overmodulation of the output voltage to avoid torque ripple on the motor shaft. This fea-
ture may be useful for applications such as grinding machines.
[1]
On
Select
[1] On
to enable the overmodulation function for the output voltage. This is the right option when it is
required that the output voltage is higher than 95% of the input voltage (typically when running over-synchro-
nously). The output voltage is increased according to the degree of overmodulation. Control in flux control
principle provides an output current of up to 98% of the input current, regardless of
parameter 14-03 Overmo-
dulation
.
Parameter 14-04 Acoustic Noise Reduction
Table 478: Parameter 14-04 Acoustic Noise Reduction
14-04 Acoustic Noise Reduction
Default Value: [0] Off
Parameter Type: Option
Setup: All set-ups
Conversion Index: -
Data Type: Uint8
Change during operation: True
Option
Name
Description
[0]*
Off
No change of the acoustic motor switching noise.
[1]
On
Select to reduce the acoustic noise from the motor.
AU373327181955en-000101 / 130R1208 | 265
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
Содержание VLT AutomationDrive EZ FC 321
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