Danfoss VLT FC 103, Programming Manual

Page: 42 / 203

Line to common (starpoint) Line to line values
Rs and Ld
Rs and Ld
130BC008.11
Illustration 3.6 Motor parameters are provided in different
formats. Danfoss frequency converters always require the line to
common value.
Permanent magnet motors
130BC009.10
Line to Line Back
Emf in RMS Value
at 1000 rpm
Speed (mech)
Illustration 3.7 Machine parameter definitions of Back Emf of
permanent magnet motors
1-39 Motor Poles
Range: Function:
Size
related
*
[2 -
100 ] Enter the number of motor poles.
Poles ~n
n
@ 50 Hz ~n
n
@60 Hz
2 2700-2880 3250-3460
4 1350-1450 1625-1730
6 700-960 840-1153
Table 3.6
The table shows the number of poles for
normal speed ranges of various motor types.
Define motors designed for other frequencies
setely. The motor pole value is always an
even number, because it refers to the total
number of poles, not pairs of poles. The
frequency converter creates the initial setting
of
1-39 Motor Poles based on 1-23 Motor
Frequency Motor Frequency and 1-25 Motor
Nominal Speed Motor Nominal Speed .
NOTE
This parameter cannot be adjusted
while the motor is running.
1-40 Back EMF at 1000 RPM
Range: Function:
Size related
*
[ 10 - 9000
V] Set the nominal back EMF for the
motor when running at 1000 RPM.
This parameter is only active when
1-10 Motor Construction is set to PM
motor [1] (Permanent Magnet Motor).
3.3.6 1-5* Load Indep. Setting
1-50 Motor Magnetisation at Zero Speed
Range: Function:
100
%
*
[0 -
300
%] 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
130BA045.11
Hz
Par.1-50
Par.1-51
100%
Par.1-52 RPM
Illustration 3.8
NOTE
1-50 Motor Magnetisation at Zero Speed will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
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
[RPM] are of no significance.
Use this parameter along with
1-50 Motor Magnetisation at Zero Speed .
See Table 3.6 .
NOTE
1-51 Min Speed Normal Magnetising [RPM] will not have
effect when 1-10 Motor Construction = [1] PM, non salient
SPM.
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
MG16H102 - VLT
®
is a registered Danfoss trademark 41
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