Danfoss VLT AutomationDrive FC 302, Programming Manual, Page: 53 / 346

NOTICE
A simple check of the X1 + Xh sum value is to divide the
line-to-line motor voltage by the sqrt(3) and divide this
value by the motor no load current. [VL-L/sqrt(3)]/I
NL
=
X1 + Xh, see Illustration 3.6 . These values are important
to magnetize the motor properly. For high-pole motors,
it is highly recommended to perform this check.
130BA065.12
P 1-30
R
Fe
X
h
R'
r
R
s
U
1
I
1
P 1-33
P 1-34
P 1-31 P 1-35 P 1-36
X'
2δ
X
1δ
Illustration 3.6 Motor Equivalent Diagram of an Asynchronous
Motor
1-30 Stator Resistance (Rs)
Range: Function:
Size
related
*
[ 0.0140 -
140.0000
Ohm] Set the line-to-common stator resistance
value. Enter the value from a motor
datasheet or perform an AMA on a cold
motor.
NOTICE
For salient PM motors:
AMA is not available.
If only line-line data is available,
divide the line-line value by 2 to
achieve the line-to-common (star
point) value. Alternatively, measure
the value with an ohmmeter. This
also takes the resistance of the
cable into account. Divide the
measured value by 2 and enter the
result.
NOTICE
The parameter value is updated
after each torque calibration if
option
[3] 1st start with store or
option [4] Every start with store is
selected in parameter 1-47 Torque
Calibration .
1-31 Rotor Resistance (Rr)
Range: Function:
Size
related
*
[ 0.0100 -
100.0000
Ohm]
NOTICE
Parameter 1-31 Rotor Resistance (Rr)
has no effect when
parameter 1-10 Motor Construction is
set to [1] PM, non-salient SPM , [5]
Sync. Reluctance .
Set the rotor resistance value R
r
to
improve shaft performance using 1 of
these methods:
•
Run an AMA on a cold motor.
The frequency converter
measures the value from the
motor. All compensations are
reset to 100%.
•
Enter the R
r
value manually.
Obtain the value from the motor
supplier.
•
Use the R
r
default setting. The
frequency converter establishes
the setting based on the motor
nameplate data.
1-33 Stator Leakage Reactance (X1)
Range: Function:
Size
related
*
[ 0.0400 -
400.0000
Ohm]
NOTICE
This parameter is only relevant for
asynchronous motors.
Set the stator leakage 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
1
value manually.
Obtain the value from the
motor supplier.
•
Use the X
1
default setting. The
frequency converter establishes
the setting based on the motor
nameplate data.
See Illustration 3.6 .
NOTICE
The parameter value is updated
after each torque calibration if
option
[3] 1st start with store or
option [4] Every start with store is
selected in parameter 1-47 Torque
Calibration .
Parameter Descriptions Programming Guide
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