1-31 Rotor Resistance (Rr)
Range:
Function:
1.0000
Ohm
*
[0.0100 -
100.0000
Ohm]
Fine-tuning R
r
will improve shaft
performance. Set the rotor resistance value
using one of these methods:
1.
Run an AMA on a cold motor.
The frequency converter will
measure the value from the
motor. All compensations are
reset to 100%.
2.
Enter the R
r
value manually.
Obtain the value from the motor
supplier.
3.
Use the R
r
default setting. The
frequency converter establishes
the setting on the basis of the
motor nameplate data.
NOTE
will not have effect when
= [1] PM, non salient SPM.
1-35 Main Reactance (Xh)
Range:
Function:
Size
related
*
[ 1.0000 -
10000.0000
Ohm]
Set the main reactance of the motor
using one of these methods:
1.
Run an AMA on a cold motor.
The frequency converter will
measure the value from the
motor.
2.
Enter the X
h
value manually.
Obtain the value from the
motor supplier.
3.
Use the X
h
default setting.
The frequency converter
establishes the setting on the
basis of the motor name
plate data.
NOTE
will not have effect when
= [1] PM, non salient SPM.
NOTE
This parameter cannot be adjusted while running.
1-36 Iron Loss Resistance (Rfe)
Range:
Function:
Size
related
*
[ 0 -
10000.000
Ohm]
Enter the equivalent iron loss
resistance (R
Fe
) value to compensate
for iron losses in the motor.
The R
Fe
value cannot be found by
performing an AMA.
1-36 Iron Loss Resistance (Rfe)
Range:
Function:
The R
Fe
value is especially important
in torque control applications. If R
Fe
is unknown, leave
on default setting.
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
This parameter is not available from the LCP.
1-37 d-axis Inductance (Ld)
Range:
Function:
Size
related
*
[ 0.000 -
0.000 mH]
Enter the value of the d-axis
inductance. Obtain the value from
the permanent magnet motor data
sheet. This parameter is only active
when
has the
value PM, non-salient SPM [1]
(Permanent Magnet Motor).
Stator resistance and d-axis Inductance values are
normally, for asynchronous motors, described in technical
specifications as between line and common (starpoint). For
Permanent magnet motors they are typically described in
technical specifications as between Line-Line. PM motors
are typically built for star connection.
(Line to common)
This parameter gives stator winding
resistance(Rs) Similar to Asynchronous
Motor Stator resistance. The Stator
resistance is defined for line to common
measurement. That means for line-line
data (Where stator resistance is measured
between any two lines you need to divide
it with 2).
(Line to common)
This parameter gives direct axis
inductance of the PM motor. The d-axis
inductance is defined for phase to
common measurement. That means for
line-line data (Where stator resistance is
measured between any two lines you
need to divide it with 2
RMS (Line to Line
Value )
This parameter gives back emf across
stator terminal of PM Motor at 1000rpm
mechanical speed specifically. It is defined
between line to line and expressed in
RMS Value
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
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