3.3.4 1-5* Load Indep. Setting
1-50 Motor Magnetisation at Zero Speed
Range:
Function:
100
%
*
[0 -
300
%]
Use this parameter along with
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.
M ag n. cur r en t
130BA045.11
Hz
P ar .1-50
P ar .1-51
100%
P ar .1-52
R PM
1-51 Min Speed Normal Magnetising [RPM]
Range:
Function:
Size
related
*
[10 - 300
RPM]
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
are of no significance.
Use this parameter along with
. See drawing
for
1-50 Motor Magnetisation at Zero
.
1-52 Min Speed Normal Magnetising [Hz]
Range:
Function:
Size related
*
[0.3 - 10.0 Hz]
1-58 Flystart Test Pulses Current
Range:
Function:
30 %
*
[0 - 200
%]
Control the percentage of the magnetizing
current for the pulses used to detect the motor
direction. Reducing this value will reduce the
generated torque. 100% means nominal motor
current. The parameter is active when
1-73 Flying Start
is enabled. This parameter is
only available in VVC
plus
.
1-59 Flystart Test Pulses Frequency
Range:
Function:
200 %
*
[0 - 500
%]
Control the percentage of the frequency for
the pulses used to detect the motor direction.
Increasing this value will reduce the generated
torque. 100% means 2 times the slip
frequency. The parameter is active when
1-73 Flying Start
is enabled. This parameter is
only available in VVC
plus
.
3.3.5 1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range:
Function:
100 %
*
[0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running at
low speed and obtain the optimum U/f charac-
teristic. The motor size determines the
frequency range within which this ameter is
active.
Motor size
Change over
0.25 kW - 7.5 kW
< 10 Hz
11 kW - 45 kW
< 5 Hz
55 kW - 550 kW
< 3-4 Hz
130BA046.11
60%
0%
100%
U
m
Changeover
f
out
Par.1-60
Par.1-61
1-61 High Speed Load Compensation
Range:
Function:
100 %
*
[0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running at
high speed and obtain the optimum U/f charac-
teristic. The motor size determines the
frequency range within which this ameter is
active.
Motor size
Change-over
0.25 kW - 7.5 kW
> 10 Hz
11 kW - 45 kW
< 5 Hz
55 kW - 550 kW
< 3-4 Hz
1-62 Slip Compensation
Range:
Function:
0 %
*
[-500 - 500
%]
Enter the % value for slip compensation, to
compensate for tolerances in the value of n
M,N
.
Slip compensation is calculated automatically,
i.e. on the basis of the rated motor speed
n
M,N
.
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
41
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