Danfoss VLT Flow Drive FC 111 - Page 52

4.3.6 1-5* Load Indep. Setting
Parameters for load-independent motor settings.
1-50 Motor Magnetisation at Zero Speed
Default value: 100 %
Parameter type: Range
2-setup: All setups
Conversion index: -
Data type: u_int16
Change during operation: True
Use this parameter along with parameter 1-52 Min Speed Normal Magnetising [Hz] to obtain a different thermal load on the motor
when running at low speed. Enter a value that is a percentage of the rated magnetizing current. If the setting is too low, the torque
on the motor shaft may be reduced.
Magn. current
90%
Par. 1-50
Par. 1-52
Hz
e30bb780.11
Illustration 7: Motor Magnetization
Table 69: Range:
Min: 0%
Max: 300%
Default value: 100%
1-52 Min Speed Normal Magnetising [Hz]
Default value: 1 Hz
Parameter type: Range
2-setup: All setups
Conversion index: -1
Data type: u_int16
Change during operation: True
Set the required frequency for normal magnetizing current. Use this parameter along with parameter 1-50 Motor Magnetisation at
Zero Speed.
Table 70: Range:
Min: 0.1 Hz
Max: 10.0 Hz
Default value: 1 Hz
1-55 U/f Characteristic - U
Default value: Configuration dependent
Parameter type: Range
2-setup: All setups
Conversion index: -
Data type: u_int16
Change during operation: True
Enter voltage at each frequency point to form a U/f characteristic matching the motor. Frequency points are defined in parameter
1-56 U/f Characteristic - F.
Table 71: Range:
Min: 0 V
Max: 999 V
Default value: Configuration dependent
1-56 U/f Characteristic - F
Default value: Configuration dependent
Parameter type: Range
2-setup: All setups
Conversion index: -
Data type: u_int16
Change during operation: True
Enter frequency points to form a U/f characteristic matching the motor. Voltage at each point is defined in parameter 1-55 U/f Char-
acteristic - U.
Make a U/f characteristic based on 6 definable voltages and frequencies, see the following illustration. Simplify U/f characteristics by
merging 2 or more points (voltages and frequencies). Set the points at equal values.
AU363928304090en-000101 / 130R098252 | Danfoss A/S © 2021.07
Parameters
VLT® Flow Drive FC 111
Programming Guide