1-29 Automatic Motor Adaptation (AMA)
Option:
Function:
The AMA function optimizes dynamic motor performance by au-
tomatically optimizing the advanced motor parameters (par.
1-30 to par. 1-35) during motor standstill.
Activate the AMA function by pressing [Hand on] after selecting
[1] or [2]. See also the section
Automatic Motor Adaptation
. Af-
ter a normal sequence, the display will read: "Press [OK] to
finish AMA". After pressing the [OK] key, the adjustable fre-
quency drive is ready for operation.
This parameter cannot be adjusted while the motor is running.
[0]
*
OFF
[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
. Select this option if an LC filter is
used between the drive and the motor.
FC 301:
The complete AMA does not include X
h
measurement
for the FC 301. Instead, the X
h
value is determined from the
motor database. Par. 1-35
Main Reactance (X
h
)
may be adjusted
to obtain optimal start performance.
[2]
Enable reduced AMA Performs a reduced AMA of the stator resistance R
s
in the sys-
tem only.
Note:
•
For the best adaptation of the adjustable frequency drive, run the AMA on a cold motor.
•
AMA cannot be performed while the motor is running.
•
AMA cannot be performed on permanent magnet motors.
NOTE
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 the power rating of the motor.
NOTE
Avoid generating external torque during AMA.
NOTE
If one of the settings in par. 1-2* Motor Data is changed, par. 1-30 to 1-39, the
advanced motor parameters will return to default setting.
VLT
®
AutomationDrive FC 300 Instruction
Manual
4. How to Program
MG.33.A9.22 - VLT is a registered Danfoss trademark
51
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