1-03 Torque Characteristics
Option: Function:
voltage which is optimised for a constant
torque load characteristic of the motor in the
entire range down to 15 Hz but in addition
the AEO feature adapts the voltage exactly to
the current load situation, thereby reducing
energy consumption and audible noise from
the motor. To obtain optimum performance,
set the motor power factor cos phi correctly.
This value is set in 14-43 Motor Cosphi. The
parameter has a default value which is
automatically adjusted when the motor data
is programmed. These settings 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 rarely necessary to adjust the
motor power factor parameter manually.
[3]
*
Auto Energy
Optim. VT
For optimum energy efficient speed control
of centrifugal pumps and fans. Provides a
voltage optimised for a squared torque load
characteristic of the motor, but in addition
the AEO feature adapts the voltage exactly to
the current load situation, thereby reducing
energy consumption and audible noise from
the motor. To obtain optimum performance,
set the motor power factor cos phi correctly.
This value is set in 14-43 Motor Cosphi. The
parameter has a default value and is
automatically adjusted when the motor data
is programmed. These settings 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 rarely necessary to adjust the
motor power factor parameter manually.
NOTICE
Parameter 1-03 Torque Characteristics have no effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
NOTICE
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 recommended to
select Auto Energy Optim. CT
1-29 Automatic Motor Adaptation (AMA)
Option: Function:
NOTICE
This parameter cannot be adjusted
while the motor is running.
[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.
NOTICE
Parameter 1-29 Automatic Motor Adaptation (AMA) have
no effect when 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 reads: Press [OK] to finish AMA. After pressing
[OK], the frequency converter is ready for operation.
NOTICE
•
For the best adaptation of the frequency
converter, run AMA on a cold motor
•
AMA cannot be performed while the motor is
running
NOTICE
Avoid generating external torque during AMA.
NOTICE
If one of the settings in parameter group 1-2* Motor
Data is changed, 1-30 Stator Resistance (Rs) to
parameter 1-39 Motor Poles return to default settings.
NOTICE
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.
How to Programme
VLT HVAC Drive FC 102 Operating Instructions
92 MG11F402 - Rev. 2013-12-16
66
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