Danfoss VLT FC 100 Series Programming Manual page 43

®
VLT HVAC Drive Programming Guide
3.3.4. 1-5* Load Indep. Setting
Parameters for setting the load-independent motor settings.
1-50 Motor Magnetisation at Zero Speed
Range:
100% [0 - 300 %]
1-51 Min Speed Normal Magnetising [RPM]
Range:
*
15 RPM [10 - 300 RPM]
1-52 Min Speed Normal Magnetising [Hz]
Range:
*
0.5 Hz [0.3 - 10 Hz]
3.3.5. 1-6* Load Depend. Setting
Parameters for adjusting the load-dependent motor settings.
1-60 Low Speed Load Compensation
Range:
*
100% [0 - 300%]
The table shows the number of poles for normal speed ranges of various motor types. Define motors designed
for other frequencies separately. The motor pole value is always an even number, because it refers to the total
number of poles, not pairs of poles. The frequency converter creates the initial setting of par. 1-39 based on par.
1-23 Motor Frequency and par. 1-25
This parameter cannot be adjusted while the motor is running.
Function:
Use this par. along with par. 1-51 Min Speed Normal Magnetising [RPM]
motor when running at low speed.
Enter a value which is a percentage of the rated magnetizing current. If the setting is too low, the torque on the
motor shaft may be reduced.
Function:
Set the required speed for normal magnetising current. If the speed is set lower than the motor slip speed, par.
1-50 Motor Magnetisation at Zero Speed
Use this par. along with par. 1-50. See drawing for par. 1-50.
Function:
Set the required frequency for normal magnetising current. If the frequency is set lower than the motor slip
Motor Magnetisation at Zero Speed
frequency, par. 1-50
are inactive.
Use this par. along with par. 1-50. See drawing for par. 1-50.
Function:
Enter the % value to compensate voltage in relation to load when the motor is running at low speed and obtain
the optimum U/f characteristic. The motor size determines the frequency range within which this parameter is
active.
Motor size
0.25 kW - 7.5 kW
11 kW - 45 kW
55 kW - 550 kW
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
Motor Nominal Speed .
to obtain a different thermal load on the
and par. 1-51 are of no significance.
Min Speed Normal Magnetising [RPM]
and par. 1-51
< 10 Hz
< 5 Hz
< 3-4 Hz
3. Parameter Description
.
Change over
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