Danfoss VLT HVAC Series

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