Danfoss VLT DriveMotor FCP 106 Programming Manual page 44

Parameters
NOTICE
Full AMA should be run without filter only while reduced
AMA should be run with filter.
1-30 Stator Resistance (Rs)
Range:
Size
4 4 related 99.99 Ohm]
*
1-33 Stator Leakage Reactance (X1)
Range:
Size related
*
1-35 Main Reactance (Xh)
Range:
Size [ 0.0 -
related 999.9
*
Ohm]
1-37 d-axis Inductance (Ld)
Range:
Size
related 0.000 mH]
*
Stator resistance and d-axis Inductance values are
normally, for asynchronous motors, described in technical
specifications as between line and common (starpoint). For
PM motors they are typically described in technical specifi-
42
Function:
NOTICE
[ 0.0 -
This parameter cannot be
adjusted while the motor is
running.
Set the stator resistance value. Enter
the value from a motor data sheet or
perform an AMA on a cold motor.
Function:
[ 0.0 - 999.9 Ohm] Set stator leakage reactance of
motor.
Function:
Set the main reactance of the motor using
one of these methods:
1. Run an AMA on a cold motor. The
frequency converter measures the
value from the motor.
2. Enter the X value manually.
h
Obtain the value from the motor
supplier.
3. Use the X default setting. The
h
frequency converter establishes the
setting on the basis of the motor
name plate data.
Function:
NOTICE
[ 0.000 -
This parameter is only active
when 1-10 Motor Construction
has the value PM, non-salient
SPM [1] (Permanent Magnet
Motor).
Enter the value of the d-axis
inductance. Obtain the value from
the PM motor data sheet.
®
VLT DriveMotor FCP 106 and FCM 106 Programming Guide
cations as between Line-Line. PM motors are typically built
for star connection.
1-30 Stator
Resistance (Rs)
(Line to common)
parameter 1-37 d-
axis Inductance (Ld)
(Line to common)
1-40 Back EMF at
1000 RPM
RMS (Line to Line
Value )
Table 4.3 Parameters related to PM Motors
NOTICE
Motor manufacturers provide values for Stator resistance
(1-30 Stator Resistance (Rs)) and d-axis Inductance
(parameter 1-37 d-axis Inductance (Ld)) in technical
specifications as between line and common (starpoint) or
between Line-Line. There is no general standard. The
different setups of Stator Winding Resistance and
Induction are shown in Illustration 4.2. Danfoss inverters
always require the line to common value. The back EMF
of PM motor is defined as `Induced EMF developed
across any of two phases of stator winding of free
running Motor'. Danfoss inverters always require the Line
to Line RMS value measured at 1000 rpm, mechanical
speed of rotation. This is shown in Illustration 4.3)
Line to common (starpoint)
Illustration 4.2 Motor parameters are provided in different
formats. Danfoss frequency converters always require the line
to common value.
MG03N102 - Rev. 2013-12-02
This parameter gives stator winding
resistance (R ) Similar to Asynchronous
s
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 2 lines, divide by 2.
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 2 lines, divide by
2.
This parameter gives back EMF across
stator terminal of PM Motor at 1000 RPM
mechanical speed specifically. It is defined
between line to line and expressed in
RMS Value
Line to line values
Rs and Ld
Rs and Ld