Danfoss VLT AutomationDrive FC 301 Programming Manual page 44

Parameter Descriptions
1-48 Inductance Sat. Point
Range:
35 % [1 - 500 %]
*
3.3.6 1-5* Load Indep. Setting
3 3
1-50 Motor Magnetisation at Zero Speed
Range:
100 [0 -
% 300
*
%]
NOTICE
1-50 Motor Magnetisation at Zero Speed has no effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-51 Min Speed Normal Magnetising [RPM]
Range:
Size related
*
300
RPM]
NOTICE
1-51 Min Speed Normal Magnetising [RPM] has no effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-52 Min Speed Normal Magnetising [Hz]
Range:
Size related
*
250.0
Hz]
42
Function:
Inductance Saturation Point.
Function:
Use this parameter along with 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.
Magn. current
100%
Par.1-50
Par.1-51
Par.1-52
Illustration 3.7 Motor Magnetisation
Function:
[10 - Set the required speed for normal
magnetising current. If the speed is set
lower than the motor slip speed,
1-50 Motor Magnetisation at Zero Speed
and 1-51 Min Speed Normal Magnetising
[RPM] are of no significance.
Use this parameter along with 1-50 Motor
Magnetisation at Zero Speed. See Table 3.6.
Function:
[ 0 - Set the required frequency for normal
magnetising current. If the frequency is
set lower than the motor slip frequency,
1-50 Motor Magnetisation at Zero Speed is
inactive.
Use this parameter along with 1-50 Motor
Magnetisation at Zero Speed. See drawing
®
VLT AutomationDrive FC 301/302 Programming Guide
1-52 Min Speed Normal Magnetising [Hz]
Range:
1-53 Model Shift Frequency
Range:
Size
related
*
Hz
RPM
MG33MH02 - Rev. 2013-09-30
Function:
for 1-50 Motor Magnetisation at Zero
Speed.
Function:
NOTICE
[ 4 -
18.0
This parameter cannot be adjusted
Hz]
while the motor is running.
Flux Model shift
Enter the frequency value for shift between 2
models for determining motor speed. Select
the value based on settings in 1-00 Configu-
ration Mode and 1-01 Motor Control Principle.
There are 2 options: shift between Flux model
1 and Flux model 2; or shift between Variable
Current mode and Flux model 2. FC 302 only.
Flux Model 1 – Flux model 2
This model is used when 1-00 Configuration
Mode is set to Speed closed loop [1] or Torque
[2] and 1-01 Motor Control Principle 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 sensitive speed and torque control
applications.
f x 0.1 f x 0.125
N,M N,M
Flux model 1 Flux model 2
P 1-53
Illustration 3.8 1-00 Configuration Mode =
[1] Speed closed loop or [2] Torque and
1-01 Motor Control Principle = [3] Flux w/
motor feedback
Variable Current - Flux model - Sensorless
This model is used when 1-00 Configuration
Mode is set to [0] Speed open loop and
1-01 Motor Control Principle is set to [2] Flux
sensorless.
In speed open loop in flux mode, the speed is
determined from the current measurement.
Below f x 0.1, the frequency converter runs
norm
on a Variable Current model. Above f
0.125 the frequency converter runs on a Flux
model.
f
out
x
norm