4.11. Parameter Group 14: Special Functions
4.11.1. 14-** Special Functions
Parameter group for configuring special frequency converter functions.
4.11.2. Inverter Switching, 14-0*
Parameters for configuring the inverter switching.
14-01 Switching Frequency
Option: Function:
Select the switching frequency in order to minimize e.g. acoustic
noise and power loss or maximizing efficiency.
[0] 2 KHz
[1]
*
4 KHz
[2] 8 KHz
[3] 12 KHz
[4] 16 KHz
14-03 Overmodulation
Option: Function:
This feature allows more accurate speed control near and over
nominal speed (50/60 Hz). Another advantage with overmodu-
lation is the ability of staying at a constant speed even though
mains is dropping.
[0] Off Disables the overmodulation function to avoid torque ripple on
the motor shaft.
[1]
*
On Connects the overmodulation function to obtain an output volt-
age up to 15% greater than mains voltage.
4.11.3. 14-1* Mains Monitoring
This parameter group supplies functions for handling imbalance on mains.
14-12 Functions at Mains Imbalance
Option: Function:
Operation under severe mains imbalance conditions reduces
drive lift time.
Select function to take place when severe mains imbalance is
detected.
[0]
*
Trip Frequency converter trips.
[1] Warning Frequency converter issues a warning.
[2] Disabled No action taken.
VLT Micro Drive FC 51 4. Parameter Descriptions
MG.02.C2.02 - VLT
®
is a registered Danfoss trademark
65
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