Parameters 1-** Load And Motor - Danfoss VLT AQUA Drive FC 200 Programming Manual

Parameter Description

3.3 Parameters 1-** Load and Motor

3.3.1 1-0* General Settings
Define whether the frequency converter operates in open
loop or closed loop.
3 3
1-00 Configuration Mode
Option:
[0] Open
*
Loop
[3] Closed
Loop
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
When set for Closed Loop, the commands Reversing and
Start Reversing will not reverse the direction of the motor.
1-01 Motor Control Principle
Option: Function:
Select which motor control principle to employ.
[0] U/f Special motor mode, for parallel connected motors
*
in special motor applications. When U/f is selected
the characteristic of the control principle can be
edited in 1-55 V/f Characteristic - V and 1-56 V/f
Characteristic - f.
[1] VVC+ Voltage Vector Control principle suitable for most
applications. The main benefit of VVC
that it uses a robust motor model.
NOTE
This parameter cannot be adjusted while the motor is
running.
1-03 Torque Characteristics
Option:
[0] Constant
Torque
*
36
VLT
Function:
Motor speed is determined by applying a speed
reference or by setting desired speed when in
Hand Mode.
Open Loop is also used if the frequency
converter is of a closed loop control system
based on an external PID controller providing a
speed reference signal as output.
Motor Speed will be determined by a reference
from the built-in PID controller varying the
motor speed as of a closed loop control process
(e.g. constant pressure or flow). The PID
controller must be configured in parameter
group 20-** or via the Function Setups accessed
by pressing [Quick Menus].
Function:
For speed control of constant torque
applications like axial pumps, positive
displacement pumps and blowers. Provides a
voltage which is optimized for a constant
MG20O602 - VLT
®
AQUA Drive Programming Guide
1-03 Torque Characteristics
Option:
[1] Variable
torque
[2] Auto
Energy
Optim. CT
[3] Auto
Energy
*
Optim. VT
plus
operation is
NOTE
1-03 Torque Characteristics will not have effect when
1-10 Motor Construction = [1] PM, non salient SPM.
®
is a registered Danfoss trademark
Function:
torque load characteristic of the motor in the
entire range speed.
For speed control of centrifugal pumps and
fans. Also to be used when controlling more
than one motor from the same frequency
converter (e.g. multiple condenser fans or
cooling tower fans). Provides a voltage which is
optimized for a squared torque load charac-
teristic of the motor.
For optimum energy efficient 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 15 Hz 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 14-43 Motor Cosphi. The
parameter has a default value which is automat-
ically 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 1-29 Automatic Motor
Adaptation (AMA). It is very rarely necessary to
adjust the motor power factor parameter
manually.
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 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 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 1-29 Automatic Motor
Adaptation (AMA). It is very rarely necessary to
adjust the motor power factor parameter
manually.