Parameters 1-** Load And Motor - Danfoss VLT AQUA Drive FC 202 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
NOTICE
When set for Closed Loop, the commands Reversing and
Start Reversing do not reverse the direction of the
motor.
1-01 Motor Control Principle
Option: Function:
NOTICE
This parameter cannot be adjusted while the
motor is running.
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
parameter 1-55 V/f Characteristic - V and
parameter 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.
1-03 Torque Characteristics
Option:
[0] Constant
torque
38
Function:
NOTICE
This parameter cannot be adjusted while
the motor is running.
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 is 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-** Feedback or
via the Function Set-ups accessed by pressing
[Quick Menus].
Function:
For speed control of constant torque applications
like axial pumps, positive displacement pumps
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
Programming Guide
1-03 Torque Characteristics
Option:
[1] Variable
torque
[2] Auto
Energy
Optim. CT
[3] Auto
Energy
Optim. VT
+ operation is
NOTICE
1-03 Torque Characteristics does not have effect when
parameter 1-10 Motor Construction = [1] PM, non-salient
SPM.
Function:
and blowers. Provides a voltage which is
optimised for a constant torque load charac-
teristic 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 optimised for a
squared torque load characteristic of the motor.
For optimum energy-efficient speed control of
screw and scroll compressors. Provides a 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
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 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 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 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 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
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.
MG20O702