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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
Motor Nominal Speed
.
This parameter cannot be adjusted while the motor is running.
3.3.4. 1-5* Load Indep. Setting
Parameters for setting the load-independent motor settings.
1-50 Motor Magnetisation at Zero Speed
Range:
Function:
100% [0 - 300 %]
Use this par. along with par. 1-51
Min Speed Normal Magnetising [RPM]
to obtain a different thermal load on the
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.
1-51 Min Speed Normal Magnetising [RPM]
Range:
Function:
15 RPM
*
[10 - 300 RPM]
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
and par. 1-51 are of no significance.
Use this par. along with par. 1-50. See drawing for par. 1-50.
1-52 Min Speed Normal Magnetising [Hz]
Range:
Function:
0.5 Hz
*
[0.3 - 10 Hz]
Set the required frequency for normal magnetising current. If the frequency is set lower than the motor slip
frequency, par. 1-50
Motor Magnetisation at Zero Speed
and par. 1-51
Min Speed Normal Magnetising [RPM]
.
are inactive.
Use this par. along with par. 1-50. See drawing for par. 1-50.
3.3.5. 1-6* Load Depend. Setting
Parameters for adjusting the load-dependent motor settings.
1-60 Low Speed Load Compensation
Range:
Function:
100%
*
[0 - 300%]
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
Change over
0.25 kW - 7.5 kW
< 10 Hz
11 kW - 45 kW
< 5 Hz
55 kW - 550 kW
< 3-4 Hz
VLT
®
HVAC Drive Programming Guide
3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
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