Danfoss VLT HVAC Series Programming Manual page 48

3 Parameter Description
3.3.4 1-5* Load Indep. Setting
Parameters for setting the load-independent motor settings.
1-50 Motor Magnetization at Zero Speed
Range:
100 %* [0 - 300 %]
3
1-51 Min Speed Normal Magnetizing [RPM]
Range:
15. RPM* [10 - 300 RPM]
1-52 Min Speed Normal Magnetizing [Hz]
Range:
0.5 Hz* [0.3 - 10.0 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 %]
3-24
Function:
Use this parameter along with par.1-51
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.
Function:
Set the required speed for normal magnetizing current. If the speed is set lower than the motor slip
Motor Magnetization at Zero Speed
speed, par.1-50
[RPM]
are of no significance.
Use this parameter along with par.1-50
1-50 Motor Magnetization at Zero Speed
Function:
Set the required frequency for normal magnetizing current. If the frequency is set lower than the
Motor Magnetization at Zero Speed
motor slip frequency, par.1-50
Magnetizing [RPM] are inactive.
Use this parameter along with par.1-50
Motor Magnetization at Zero Speed
1-50
Function:
Enter the % value to compensate voltage in relation to load while the motor is running at low speed,
and obtain the optimum U/f characteristic. The motor size determines the frequency ranges within
which this parameter is active.
Motor size
0.3–10 hp [0.25–7.5 kW]
15–60 hp [11–45 kW]
75-738 hp [55-550 kW]
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Programming Guide
Min Speed Normal Magnetizing [RPM]
Min Speed Normal Magnetizing
and par.1-51
Motor Magnetization at Zero Speed . See drawing for par.
.
and par.1-51
Motor Magnetization at Zero Speed . See drawing for par.
.
Change-over
< 10 Hz
< 5 Hz
< 3-4 Hz
to obtain a different
Min Speed Normal