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 adjustable frequency drive operates in
open-loop or closed-loop.
1-00 Configuration Mode
Option: Function:
[0] Open- Motor speed is determined by applying a speed
loop reference or by setting desired speed when in
Hand mode.
Open-loop is also used if the adjustable
frequency drive is part of a closed-loop control
system based on an external PID controller
providing a speed reference signal as output.
[3] Closed- Motor Speed will be determined by a reference
loop from the built-in PID controller varying the motor
speed as part 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 Set-ups accessed by
pressing [Quick Menus].
NOTICE!
This parameter cannot be adjusted while the motor is
running.
NOTICE!
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.
NOTICE!
This parameter cannot be adjusted while the motor is
running.
1-03 Torque Characteristics
Option: Function:
[0] Constant For speed control of constant torque applications
torque like axial pumps, positive displacement pumps
®
VLT AQUA Drive Programming Guide
1-03 Torque Characteristics
Option:
[1] Variable
[2] Auto
[3] Auto
plus
operation is
NOTICE!
1-03 Torque Characteristics will not have effect when
1-10 Motor Construction = [1] PM, non-salient SPM.
®
MG20O622 - VLT is a registered Danfoss trademark
Function:
and blowers. Provides a voltage which is
optimized for a constant torque load charac-
teristic of the motor in the entire range speed.
For speed control of centrifugal pumps and fans.
torque Also to be used when controlling more than one
motor from the same adjustable frequency drive
(e.g., multiple condenser fans or cooling tower
fans). Provides a voltage which is optimized for a
squared torque load characteristic of the motor.
For optimum energy efficient speed control of
Energy screw and scroll compressors. Provides a voltage
Optim. CT 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
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
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
Energy centrifugal pumps and fans. Provides a voltage
Optim. VT 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 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, 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.
3 3
3-15