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 adjustable frequency drive 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 adjustable frequency drive is ready for operation.
NOTE:
•
For the best adaptation of the adjustable frequency drive, run AMA on a cold motor
•
AMA cannot be performed while the motor is running.
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 motor power rating.
NOTE!
Avoid generating external torque during AMA.
NOTE!
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 the default setting.
This parameter cannot be adjusted while the motor is running.
NOTE!
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.
1-71 Start Delay
Range:
Function:
0.0 s*
[0.0 - 120.0 s]
The function selected in par. 1-80
is active in the delay period.
Enter the time delay required before commencing acceleration.
1-73 Flying Start
Option:
Function:
This function makes it possible to catch a motor that is spinning freely due to a line drop-out.
7 How to Program the Adjustable Frequency
Drive
VLT
®
HVAC Drive Instruction Manual
7-16
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
7
