1-65 Resonance Damping Time Constant
Range:
Function:
5 ms
*
[5 - 50
ms]
NOTICE
Parameter 1-65 Resonance Damping Time
Constant
has no effect when
parameter 1-10 Motor Construction
=
[1]
PM, non-salient SPM
.
Set
parameter 1-64 Resonance Damping
and
parameter 1-65 Resonance Damping Time
Constant
to help eliminate high frequency
resonance problems. Enter the time constant
that provides the best dampening.
1-66 Min. Current at Low Speed
Range:
Function:
Size
related
*
[ 1 -
200 %]
NOTICE
Parameter 1-66 Min. Current at Low
Speed
has no effect if
parameter 1-10 Motor Construction
=
[0] Asynchron
.
Enter the minimum motor current at low
speed.
Increasing this current improves developed
motor torque at low speed. Low speed is
here defined as speeds below 6% of the
nominal motor speed (
) in VVC
+
PM Control.
3.3.11 1-7* Start Adjustments
1-70 Start Mode
Option:
Function:
[0] Rotor
Detection
Suitable for all applications where the motor is
known to be standing still when starting (for
example conveyors, pumps, and non-wind
milling fans).
[1] Parking
If the motor turns at a low speed (that is lower
than 2–5% of the nominal speed), for example
due to fans with windmilling, select
[1] Parking
and adjust
parameter 2-06 Parking Current
and
accordingly.
[2] Rotor Det.
w/ Parking
1-71 Start Delay
Range:
Function:
00 s
*
[0 -
300 s]
Enter the time delay between the start
command and the time when the frequency
converter supplies the power to the motor.
This parameter is related to the start function
selected in
parameter 1-72 Start Function
.
1-72 Start Function
Option:
Function:
Select the start function during start delay. This
parameter is linked to
[0] DC Hold/
Motor
Preheat
Energizes the motor with a DC hold current
(
parameter 2-00 DC Hold/Preheat Current
) during
the start delay time.
[2] Coast
Motor coasted during the start delay time
(inverter off).
Available selections depend on
parameter 1-10 Motor Construction
[0] Asynchron
:
•
[2] Coast
.
•
[0] DC hold
.
[1] PM non-salient
:
•
[2] Coast
.
1-73 Flying Start
Option:
Function:
This function makes it possible to catch a motor
that is spinning freely due to a mains dropout.
When
is enabled,
has no function.
Search direction for flying start is linked to the
setting in
parameter 4-10 Motor Speed Direction
.
[0] Clockwise
: Flying start searches in clockwise
direction. If not successful, a DC brake is carried
out.
[2] Both Directions
: The flying start first makes a
search in the direction determined by the last
reference (direction). If the speed is not found, it
makes a search in the other direction. If not
successful, a DC brake is activated in the time set
in
parameter 2-02 DC Braking Time
. Start then takes
place from 0 Hz.
[0] Disabled Select
[0] Disable
if this function is not required.
[1] Enabled Select
[1] Enable
to enable the frequency converter
to catch and control a spinning motor.
The parameter is always set to
[1] Enable
when
parameter 1-10 Motor Construction
=
[1] PM non-
salient
.
Important related parameters:
•
Parameter 1-58 Flying Start Test Pulses
Current
.
•
Parameter 1-59 Flying Start Test Pulses
Frequency
.
•
•
Parameter 2-03 DC Brake Cut In Speed
[RPM]
•
Parameter 2-04 DC Brake Cut In Speed [Hz]
.
•
Parameter 2-06 Parking Current
Parameter Description
VLT
®
AQUA Drive FC 202
56
Danfoss A/S © 05/2018 All rights reserved.
MG20OB02
3
3
Summary of Contents for VLT AQUA Drive FC 202
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