cooling tower fans). Provides a voltage which is optimized for a squared torque load characteristic
of the motor.
[2]
Auto Energy Optim. CT
Auto Energy Optimization Compressor
[2]: For optimum energy efficient speed control of screw
and scroll compressors. Provides a voltage which is optimized for a constant torque load charac-
teristic of the motor in the entire range down to 15Hz but in addition the AEO feature will adapt
the voltage exactly to the current load situation, thereby reducing energy consumption and audi-
ble noise from the motor. To obtain optimal performance, the motor power factor cos phi must
be set correctly. This value is set in par. 14-43
Motor Cosphi
. The parameter has a default value
which is automatically adjusted when the motor data is programmed. These settings will typically
ensure optimum motor voltage but if the motor power factor cos phi requires tuning, an AMA
function can be carried out using par. 1-29
Automatic Motor Adaptation (AMA)
. It is very rarely
necessary to adjust the motor power factor parameter manually.
[3] *
Auto Energy Optim. VT
Auto Energy Optimization VT
[3]: For optimum energy efficient speed control of centrifugal
pumps and fans. Provides a voltage which is optimized for a squared torque load characteristic of
the motor but in addition the AEO feature will adapt the voltage exactly to the current load situa-
tion, thereby reducing energy consumption and audible noise from the motor. To obtain optimal
performance, the motor power factor cos phi must be set correctly. This value is set in
par. 14-43
Motor Cosphi
. The parameter has a default value and is automatically adjusted when
the motor data is programmed. These settings will typically ensure optimum motor voltage but if
the motor power factor cos phi requires tuning, an AMA function can be carried out using
par. 1-29
Automatic Motor Adaptation (AMA)
. It is very rarely necessary to adjust the motor pow-
er factor parameter manually.
will not have effect
when par. 1-10
Motor Construction
= [1] PM, non sa-
lient SPM.
For pumps or fan applications where the viscosity or
density can vary significantly or where excessive flow
e.g. due pipe breakage, can occur, it is recommen-
ded to select Auto Energy Optim. CT
1-29 Automatic Motor Adaptation (AMA)
Option:
Function:
The AMA function optimizes dynamic motor performance by automatically optimizing the ad-
vanced motor 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.
Automatic Motor Adaptation (AMA)
have effect when par. 1-10
Motor Construction
= [1]
PM, non salient SPM.
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.
•
For the best adaptation of the frequency
converter, run AMA on a cold motor
•
AMA cannot be performed while the motor
is running
Avoid generating external torque during AMA.
6 How to Programme
VLT HVAC Drive High Power Operating In-
structions
104
MG.11.F3.02 - VLT
®
is a registered Danfoss trademark
6