Danfoss VLT Series Programming Manual page 42

Parameter Description
1-31 Rotor Resistance (Rr)
Range: Function:
1.0000 [0.0100 - Fine-tuning R
Ohm 100.0000 performance. Set the rotor resistance value
*
Ohm] using one of these methods:
1.
2.
3.
NOTE
1-31 Rotor Resistance (Rr) will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-35 Main Reactance (Xh)
Range: Function:
Size [ 1.0000 - Set the main reactance of the motor
related 10000.0000 using one of these methods:
*
Ohm]
1.
2.
3.
NOTE
1-35 Main Reactance (Xh) will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
NOTE
This parameter cannot be adjusted while running.
1-36 Iron Loss Resistance (Rfe)
Range: Function:
Size [ 0 - Enter the equivalent iron loss
related 10000.000 resistance (R
*
Ohm]
for iron losses in the motor.
The R
performing an AMA.
®
VLT HVAC Drive Programming Guide
will improve shaft
r
Run an AMA on a cold motor.
The frequency converter will
measure the value from the
motor. All compensations are
reset to 100%.
Enter the R value manually.
r
Obtain the value from the motor
supplier.
Use the R default setting. The
r
frequency converter establishes
the setting on the basis of the
motor nameplate data.
Run an AMA on a cold motor.
The frequency converter will
measure the value from the
motor.
Enter the X value manually.
h
Obtain the value from the
motor supplier.
Use the X default setting.
h
The frequency converter
establishes the setting on the
basis of the motor name
plate data.
) value to compensate
Fe
value cannot be found by
Fe
®
MG.11.CC.02 - VLT is a registered Danfoss trademark
1-36 Iron Loss Resistance (Rfe)
Range: Function:
The R
in torque control applications. If R
is unknown, leave 1-36 Iron Loss
Resistance (Rfe) 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 [ 0.000 - Enter the value of the d-axis
related 0.000 mH] inductance. Obtain the value from
*
the permanent magnet motor data
sheet. This parameter is only active
when 1-10 Motor Construction 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.
1-30 Stator Resistance This parameter gives stator winding
(Rs) resistance(Rs) Similar to Asynchronous
(Line to common) 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).
1-37 d-axis This parameter gives direct axis
Inductance (Ld) inductance of the PM motor. The d-axis
(Line to common) 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
1-40 Back EMF at This parameter gives back emf across
1000 RPM stator terminal of PM Motor at 1000rpm
RMS (Line to Line mechanical speed specifically. It is defined
Value ) between line to line and expressed in
RMS Value
value is especially important
Fe
Fe
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