Danfoss FC 300 Programming Manual page 45

FC 300 Programming Guide
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]
Option:
[Size related] 0 - 250 Hz
1-53 Model Shift Frequency
Range:
Size related [4.0 - 50.0 Hz]
Function:
Min Speed Normal Magnetising [RPM]
Use this par. along with par. 1-51
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.
Motor Magnetisation at Zero Speed
1-50
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
Use this par. along with par. 1-50. See drawing for par. 1-50.
Function:
Flux Model shift
Enter the frequency value for shift between two models for determining motor speed. Choose the value based
Configuration Mode
on settings in par. 1-00
between Flux model 1 and Flux model 2; or shift between Variable Current mode and Flux model 2. This pa-
rameter is available for FC 302 only.
This parameter cannot be adjusted while the motor is running.
Flux Model 1 – Flux model 2
This model is used when par. 1-00 is set to
motor feedback [3]. With this parameter it is possible to make an adjustment of the shifting point where FC 302
changes between Flux model 1 and Flux model 2, which is useful in some sensitive speed and torque control
applications.
Illustration 2.2: Par. 1-00 = [1] Speed closed loop or [2] Torque and par. 1-01 = [3] Flux w/motor
feedback
®
MG.33.M3.02 - VLT is a registered Danfoss trademark
to obtain a different thermal load on the
and par. 1-51 are of no significance.
is inactive.
Motor Control Principle
and par. 1-01
Speed closed loop [1] or Torque [2] and par. 1-01 is set to
2. How to Programme
. There are two options: shift
Flux w/
45
2