1-03 Torque Characteristics
Option: Function:
[0] Compressor
torque
Compressor [0]: For speed control of screw
and scroll compressors. Provides a voltage
which is optimized for a constant torque load
characteristic of the motor in the entire range
down to 10 Hz.
[1] Variable
torque
Variable Torque [1]: For speed control of
centrifugal pumps and fans. Also to be used
when controlling more than one motor from
the same (e.g., multiple condenser fans or
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 ecient speed control of
screw and scroll compressors. Provides a
voltage that is optimized for a constant
torque load characteristic of the motor in the
entire range down to 15 Hz. In addition, the
AEO feature will adapt the voltage exactly to
the current load situation, 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
parameter 14-43 Motor Cos-Phi. 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
parameter 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 ecient speed control of centrifugal
pumps and fans. Provides a voltage which is
optimized for a squared torque load charac-
teristic of the motor but in addition the AEO
feature will adapt the voltage exactly to the
current load situation, 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
parameter 14-43 Motor Cos-Phi. 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,
1-03 Torque Characteristics
Option: Function:
an AMA function can be carried out using
parameter 1-29 Automatic Motor Adaptation
(AMA). It is very rarely necessary to adjust the
motor power factor parameter manually.
NOTICE!
Parameter 1-03 Torque Characteristics will not have eect
when parameter 1-10 Motor Construction = [1] PM, non-
salient SPM.
NOTICE!
For pumps or fan applications where the viscosity or
density can vary signicantly or where excessive ow,
e.g., due to pipe breakage can occur, it is recommended
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
advanced motor parameter 1-30 Stator
Resistance (Rs) to parameter 1-35 Main
Reactance (Xh)) while the motor is stationary.
[0] * O 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 lter is used between the
adjustable frequency drive and the motor.
NOTICE!
Parameter 1-29 Automatic Motor Adaptation (AMA) will
not have eect when parameter 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
nish AMA”. After
pressing the [OK] key, the adjustable frequency drive is
ready for operation.
How to Program
Instruction Manual
MG11F522 Danfoss A/S © 08/2014 All rights reserved. 87
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