1-29 Automatic Motor Adaptation (AMA)
Option: Function:
The AMA function optimizes dynamic motor performance by automatically optimizing the advanced
motor parameters par. 1-30
Stator Resistance (Rs)
to par. 1-35
Main Reactance (Xh)
) while the
motor is stationary.
[0] * Off No 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
filter is used between the frequency converter and the motor.
Activate the AMA function by pressing [Hand on] after selecting [1] or [2]. See also the item
Automatic Motor Adaptation
in the Design Guide. After a
normal sequence, the display will read: “Press [OK] to finish AMA”. After pressing the [OK] key the frequency converter is ready for operation.
NOTE:
• For the best adaptation of the frequency converter, run AMA on a cold motor
• AMA cannot be performed while the motor is running
NB!
It is important to set motor par. 1-2* Motor Data correctly, since these form part of the AMA algorithm. An AMA must be performed
to achieve optimum dynamic motor performance. It may take up to 10 min., depending on motor power rating.
NB!
Avoid generating external torque during AMA.
NB!
If one of the settings in par. 1-2* Motor Data is changed, par. 1-30
Stator Resistance (Rs)
to par. 1-39
Motor Poles
, the advanced
motor parameters, will return to default setting.
This parameter cannot be adjusted while the motor is running.
NB!
Full AMA should be run without filter only while reduced AMA should be run with filter.
See section:
Application Examples > Automatic Motor Adaptation
in the Design Guide.
3.3.3 1-3* Adv. Motor Data
Parameters for advanced motor data. The motor data in par. 1-30
Stator Resistance (Rs)
to par. 1-39
Motor Poles
must match the relevant motor in order
to run the motor optimally. The default settings are figures 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. The AMA sequence will adjust all motor parameters except the moment
of inertia of the rotor and the iron loss resistance (par. 1-36
Iron Loss Resistance (Rfe)
).
Parameter group 1-3* and parameter group 1-4* cannot be adjusted while the motor is running.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
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