N O T I C E
If 1 of the settings in
parameter 1-2* Motor Data
is changed,
parameter 1-30 Stator Resistance (Rs)
to
parameter 1-39 Motor Poles
return to default setting.
N O T I C E
AMA works problem-free on 1 motor size down, typically works on 2 motor sizes down, rarely works on 3 sizes down, and never
works on 4 sizes down. Keep in mind that the accuracy of the measured motor data is poorer when operating on motors smaller
than the nominal drive size.
4.2.5 1-3* Adv. Motor Data
Parameters for advanced motor data. Ensure that the motor data in
parameter 1-30 Stator Resistance (Rs)
to
parameter 1-39 Motor
Poles
matches the motor. The default settings are based on standard motor values. If the motor parameters are not set correctly, a
malfunction of the drive system may occur. If the motor data is unknown, running an AMA (automatic motor adaptation) is recom-
mended. See
parameter 1-29 Automatic Motor Adaptation (AMA)
.
Parameter groups 1-3* Adv. Motor Data
and
1-4* Adv. Motor Data II
cannot be adjusted while the motor is running.
N O T I C E
A simple check of the X
1
+ X
h
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)]/INL = X
1
+ X
h
. These values are important to magnetize the motor properly. For high-pole
motors, it is highly recommended to perform this check.
e
3
0
b
a
0
6
5
.1
3
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'
2#
X
1#
Illustration 28: Motor Equivalent Diagram of an Asynchronous Motor
Parameter 1-30 Stator Resistance (Rs)
Table 85: Parameter 1-30 Stator Resistance (Rs)
1-30 Stator Resistance (Rs)
Default value: Size related
Parameter type: Range, 0.0140 - 140.0000 Ohm
Setup: All setups
Conversion index: -4
Data type: Uint32
Change during operation: False
Set the line-to-common stator resistance value. Enter the value from a motor datasheet or perform an AMA on a cold motor.
N O T I C E
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.
N O T I C E
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
.
AU373327181955en-000101 / 130R1208
70 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
