Danfoss FC 300 Design Manual page 138

FC 300 Design Guide
This parameter cannot be adjusted while the mo-
tor is running.
Flux Model 1 – Flux model 2
This model is used when par. 1-00 is set to Speed
closed loop [1] or Torque [2] and par. 1-01 is set
to Flux w/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 sen-
sitive speed and torque control applications.
Par. 1-00 = [1] Speed closed loop or [2] Torque
and par. 1-01 = [3] Flux w/motor feedback
Variable Current - Flux model - Sensorless
This model is used when par. 1-00 is set to Speed
open loop [0] and par. 1-01 is set to Flux sensor-
less [2].
In speed open loop in flux mode, the speed is de-
termined from the current measurement.
Below f x 0.1, the drive runs on a Variable
norm
Current model. Above f
converter runs on a Flux model.
Par. 1-00 = [0] Speed open loop
Par. 1-01 = [2] Flux sensorless
1-55 U/f Characteristic - U
Value:
0.0 - max. motor voltage
factory setting
138
How to Programme
x 0.125 the frequency
norm
Size related
() display text [] value for use in communication via serial communication port
MG.33.B7.02 - VLT is a registered Danfoss trademark
Function:
Enter the voltage at each frequency point to man-
ually form a U/f-characteristic matching the mo-
tor.
The frequency points are defined in par. 1-56 U/f
Characteristic - F.
This parameter is an array parameter [0-5] and is
only accessible when par. 1-01 Motor Control Prin-
ciple is set to U/f [0].
1-56 U/f Characteristic - F
Value:
0.0 - max. motor frequency
Function:
Enter the frequency points to manually form a U/
f-characteristic matching the motor.
The voltage at each point is defined in par. 1-55
U/f Characteristic - U.
This parameter is an array parameter [0-5] and is
only accessible when par. 1-01 Motor Control Prin-
ciple is set to U/f [0].
1-6* Load Depend. Setting
Parameters for adjusting the load-dependent mo-
tor settings.
1-60 Low Speed Load Compensation
Value:
0 - 300%
Function:
Enter the % value to compensate voltage in rela-
tion 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
Size related
100%
Change over
< 10 Hz