Danfoss VLT FC 103 Programming Manual page 42

Parameter Description
Line to common (starpoint)
Rs and Ld
Illustration 3.6 Motor parameters are provided in different
formats. Danfoss frequency converters always require the line to
common value.
Permanent magnet motors
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 [2 - Enter the number of motor poles.
related 100 ]
*
Poles ~n
2 2700-2880
4 1350-1450
6 700-960
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.
®
VLT Refrigeration Drive Programming Guide
Line to line values
Rs and Ld
@ 50 Hz ~n @60 Hz
n n
3250-3460
1625-1730
840-1153
®
MG16H102 - VLT is a registered Danfoss trademark
1-40 Back EMF at 1000 RPM
Range: Function:
Size related [ 10 - 9000 Set the nominal back EMF for the
*
V] 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 - Use this parameter along with 1-51 Min Speed
% 300 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
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 [10 - 300 Set the required speed for normal
related RPM] 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.
Par.1-51 Hz
Par.1-52 RPM
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