Danfoss VLT AutomationDrive FC 301 Programming Manual page 60

Parameter Descriptions
NOTICE
•
For the best adaptation of the frequency
converter, run AMA on a cold motor.
•
AMA cannot be performed while the motor is
running.
3 3
•
AMA cannot run with a sine-wave filter
connected.
NOTICE
It is important to set motor parameter group 1-2* Motor
Data correctly, since these form part of the AMA
algorithm. Perform an AMA to achieve optimum dynamic
motor performance. It may take up to 10 minutes,
depending on the power rating of the motor.
NOTICE
Avoid generating external torque during AMA.
NOTICE
If 1 of the settings in parameter group 1-2* Motor Data is
changed, parameter 1-30 Stator Resistance (Rs) to
parameter 1-39 Motor Poles, the advanced motor
parameters, return to default setting.
NOTICE
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
frequency converter size.
3.2.7 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
frequency converter system may occur. If the motor data is
unknown, running an AMA (automatic motor adaptation) is
recommended. 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.
58
®
VLT AutomationDrive FC 301/302
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
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.
I
1
U
1
Illustration 3.6 Motor Equivalent Diagram of an Asynchronous
Motor
1-30 Stator Resistance (Rs)
Range:
Size
related
Danfoss A/S © 10/2019 All rights reserved.
P 1-34
P 1-33
P 1-30
R X
1δ
s
P 1-36
R
Fe
Function:
[ 0.0140 - Set the line-to-common stator
140.0000 resistance value. Enter the value
*
Ohm] 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.
=
NL
X'
2δ
P 1-35 P 1-31
X
R'
h
r
M0013101