Danfoss VLT AutomationDrive EZ FC 321 Programming Manual page 265

VLT® AutomationDrive EZ FC 321
Programming Guide
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
Conversion Index: -
Overmodulation leads to increased torque ripple as harmonics increase.
Op- Name Description
tion
[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
Conversion Index: -
Option Name
[0]* Off
[1] On
Danfoss A/S © 2021.08
Parameter Type: Option
Data Type: Uint8
N O T I C E
Parameter Type: Option
Data Type: Uint8
Description
No change of the acoustic motor switching noise.
Select to reduce the acoustic noise from the motor.
Parameter Descriptions
Setup: All set-ups
Change during operation: False
Setup: All set-ups
Change during operation: True
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