1-29 Automatic Motor Adaptation (AMA)
Option: Function:
[1] Enable
Complete
AMA
Performs 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
.
[2] Enable
Reduced AMA
Performs a reduced AMA of the
stator resistance R
s
in the system
only. Select this option if an LC
lter is used between the frequency
converter and the motor.
[3] Enable
Complete
AMA II
Performs AMA of the stator
resistance Rs, the rotor resistance
Rr, the stator leakage reactance X
1
,
the rotor leakage reactance X
21
, and
the main reactance X
h
.
[4] Enable
Reduced AMA
II
Performs a reduced AMA of the
stator resistance R
s
in the system
only. Select this option if an LC
lter is used between the frequency
converter and the motor.
The AMA II is a variant of AMA,
based on the principles of the
torque calibration. It is
recommended for special motors
(for example, S3) and high-power
motors.
Activate the AMA function by pressing [Hand On] after
selecting [1] Enable complete AMA or [2] Enable reduced
AMA. See also the section Automatic Motor Adaptation in
the design guide. After a normal sequence, the display
reads: Press [OK] to nish AMA. After pressing [OK], the
frequency converter is ready for operation.
NOTICE
•
For the best adaptation of the frequency
converter, run AMA on a cold motor.
•
AMA cannot be performed while the motor is
running.
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 return to default settings.
NOTICE
Only run complete AMA without lter, and only run
reduced AMA with lter.
See section Automatic Motor Adaptation in the design
guide.
3.3.6 1-3* Adv. Motor Data
Parameters for advanced motor data. The motor data in
parameter 1-30 Stator Resistance (Rs) to
parameter 1-39 Motor Poles must match the relevant motor
to run the motor optimally. The default settings are gures
based on common motor parameter values from normal
standard motors. If the motor parameters are not set
correctly, a malfunction of the frequency converter system
may occur. If the motor data is not known, running an
AMA (automatic motor adaptation) is recommended. See
the Automatic Motor Adaptation section in the design guide.
The AMA sequence adjusts all motor parameters except
the moment of inertia of the rotor and the iron loss
resistance (parameter 1-36 Iron Loss Resistance (Rfe)).
130BA375.11
R
S
P 1-30
R
1s
X
h
P1-35
R
1
X
2
X
1
U
1
I
1
Illustration 3.4 Motor Equivalent Diagram for an
Asynchronous Motor
Parameter Descriptions Programming Guide
M0010001 Danfoss A/S © 10/2019 All rights reserved. 55
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