1-29 Automatic Motor Adaptation (AMA)
Option:
Function:
•
AMA of the stator
resistance R
S
,
•
The rotor resistance R
r
,
•
The stator leakage
reactance X
1
,
•
The rotor leakage
reactance X
2
, and
•
The main reactance X
h
.
For best performance, it is
recommended to obtain the
advanced motor data from the
motor manufacturer to enter into
parameter 1-31 Rotor Resistance (Rr)
through
Complete AMA cannot be
performed on permanent magnet
motors.
[2]
Enable
Reduced AMA
Performs a reduced AMA of the
stator resistance R
s
in the system
only. This option is available for
standard asynchronous motors and
non-salient PM motors. Select this
option if an LC filter is used
between the frequency converter
and the motor.
[3]
Enable
Complete
AMA II
Use this option with special motors
(for example, S3 motors) and high-
power motors. The functionality is
similar to option
[1] Enable
Complete AMA
, but the optimization
is done based on torque calibration.
[4]
Enable
Reduced AMA
II
Use this option with special motors
(for example, S3 motors) and high-
power motors. The functionality is
similar to option
[2] Enable Reduced
AMA
, but the optimization is done
based on torque calibration.
NOTICE
•
For the best adaptation of the frequency
converter, run AMA on a cold motor.
•
AMA cannot be performed while the motor is
running.
•
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.
4.2.4 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.
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
. These values are important
to magnetize the motor properly. For high-pole motors,
it is highly recommended to perform this check.
Parameter Descriptions
VLT® AutomationDrive FC 361
36
Danfoss A/S © 03/2019 All rights reserved.
MG06J202
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Содержание VLT AutomationDrive FC 361
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