Parameter Group 14: Special Functions; Inverter Switching, 14-0*; Mains Monitoring; Functions At Mains Imbalance - Danfoss VLT FC 51 Series Programming Manual

VLT Micro Drive FC 51

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:
[0]
*
[1]
[2]
[3]
[4]
14-03 Overmodulation
Option:
[0]
*
[1]

4.11.3. 14-1* Mains Monitoring

This parameter group supplies functions for handling imbalance on mains.

14-12 Functions at Mains Imbalance

Option:
*
[0]
[1]
[2]
Function:
Select the switching frequency in order to minimize e.g. acoustic
noise and power loss or maximizing efficiency.
2 KHz
4 KHz
8 KHz
12 KHz
16 KHz
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.
Off Disables the overmodulation function to avoid torque ripple on
the motor shaft.
On Connects the overmodulation function to obtain an output volt-
age up to 15% greater than mains voltage.
Function:
Operation under severe mains imbalance conditions reduces
drive lift time.
Select function to take place when severe mains imbalance is
detected.
Trip Frequency converter trips.
Warning Frequency converter issues a warning.
Disabled No action taken.
MG.02.C2.02 - VLT ® is a registered Danfoss trademark
4. Parameter Descriptions
4
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