Adv. Motor Data - Danfoss VLT AutomationDrive EZ FC 321 Programming Manual

VLT® AutomationDrive EZ FC 321
Programming Guide
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.
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.
A simple check of the X + X
1
motor no load current. [VL-L/sqrt(3)]/INL = X
motors, it is highly recommended to perform this check.
P 1-33
P 1-30
I
1 X
R
1#
s
U
1
P 1-36
R
Fe
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
Conversion index: -4
Set the line-to-common stator resistance value. Enter the value from a motor datasheet or perform an AMA on a cold motor.
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.
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.
70 | Danfoss A/S © 2021.08
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sum value is to divide the line-to-line motor voltage by the sqrt(3) and divide this value by the
h
+ X . These values are important to magnetize the motor properly. For high-pole
1 h
P 1-34
X'
2 #
P 1-35 P 1-31
X
R'
h
r
Parameter type: Range, 0.0140 - 140.0000 Ohm
Data type: Uint32
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Parameter Descriptions
Setup: All setups
Change during operation: False
AU373327181955en-000101 / 130R1208