Danfoss PTU 025 Programming Guide

1-30 Stator Resistance (Rs)
Range: Function:
Size
related*
[ 0.0140 -
140.0000 Ohm]
Set the stator resistance value.
Enter the value from a motor
data sheet or perform an AMA on
a cold motor.
1-31 Rotor Resistance (Rr)
Range: Function:
Size
related*
[ 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.
1-35 Main Reactance (Xh)
Range: Function:
Size
related*
[ 1.0000 -
10000.0000
Ohm]
NOTICE
Parameter 1-35 Main Reactance (Xh)
does not have eect when
parameter 1-10 Motor
Construction=[1] PM, non salient
SPM.
Set the main reactance of the motor
using 1 of these methods:
•
Run an AMA on a cold motor.
The frequency converter
measures the value from the
motor.
•
Enter the X
h
value manually.
Obtain the value from the
motor supplier.
•
Use the X
h
default setting. The
frequency converter establishes
the setting on the basis of the
motor name plate data.
1-36 Iron Loss Resistance (Rfe)
Range: Function:
Size
related*
[ 0 -
10000.000
Ohm]
NOTICE
This parameter cannot be
adjusted while the motor is
running.
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.
The R
Fe
value is especially important in
torque control applications. If R
Fe
is
unknown, leave parameter 1-36 Iron
Loss Resistance (Rfe) on default setting.
1-37 d-axis Inductance (Ld)
Range: Function:
Size
related*
[0.000 -
1000.000
mH]
NOTICE
This parameter is only active
when parameter 1-10 Motor
Construction is set to [1] PM, non-
salient SPM.
Enter the value of the d-axis
inductance. Obtain the value from the
PM motor data sheet.
For asynchronous motor, stator resistance and d-axis
inductance values are normally, described in technical
specications as between line and common (starpoint). For
PM motors, they are typically described in technical speci-
cations as between line-line. PM motors are typically built
for star connection.
Parameter 1-30 Stator
Resistance (Rs)
(Line to common)
This parameter gives stator winding
resistance (R
s
) similar to asynchronous
motor stator resistance. The stator
resistance is dened for line-to-
common measurement. For line-line
data, where stator resistance is
measured between any 2 lines, divide
by 2.
Parameter 1-37 d-axis
Inductance (Ld)
(Line to common)
This parameter gives direct axis
inductance of the PM motor. The d-
axis inductance is dened for phase-
to-common measurement. For line-
line data, where stator resistance is
measured between any 2 lines, divide
by 2.
Parameter Descriptions Programming Guide
MG11CE02 Danfoss A/S © 03/2015 All rights reserved. 43
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Danfoss PTU 025 Specifications

General

Brand	Danfoss
Model	PTU 025
Category	DC Drives
Language	English