Danfoss VLT AutomationDrive FC 361 - Maintenance, Diagnostics, and Troubleshooting; Maintenance and Service

1-65 Resonance Damping Time Constant
Range: Function:
5 ms* [1 - 50 ms]
NOTICE
Parameter 1-65 Resonance
Dampening Time Constant has
no eect when
parameter 1-10 Motor
Construction = [1] PM, non-
salient SPM.
Set parameter 1-64 Resonance
Dampening and
parameter 1-65 Resonance
Dampening 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 %] Enter the minimum motor current
at low speed, see
parameter 1-53 Model Shift
Frequency. Increasing this current
improves motor torque at low
speed.
Parameter 1-66 Min. Current at Low
Speed is enabled when
parameter 1-00 Conguration Mode
is set to [0] Speed open loop only.
The frequency converter runs with
constant current through motor for
speeds below 10 Hz.
Parameter 4-16 Torque Limit Motor
Mode and/or parameter 4-17 Torque
Limit Generator Mode automatically
adjust parameter 1-66 Min. Current
at Low Speed. The parameter with
the highest value adjusts
parameter 1-66 Min. Current at Low
Speed. The current setting in
parameter 1-66 Min. Current at Low
Speed is composed of the torque
generating current and the
magnetizing current.
Example: Set parameter 4-16 Torque
Limit Motor Mode to 100% and set
parameter 4-17 Torque Limit
Generator Mode to 60%.
Parameter 1-66 Min. Current at Low
Speed automatically adjusts to
about 127%, depending on the
motor size.
4.2.7 1-7* Start Adjustments
1-70 Start Mode
Select the start-up mode. This is done to initialize the VVC
+
control core for previously free-running motor. Both selections
estimate the speed and angle. Active for PM and SynRM motors
in VVC
+
only.
Option: Function:
[0] * Rotor
Detection
Estimates the electrical angle of the
rotor and uses this as a starting
point. Standard selection for VLT
®
AutomationDrive applications.
[1] Parking The parking function applies DC
current across the stator winding
and rotates the rotor to electrical 0
position (typically selected for HVAC
applications). Parking current and
time are congured in
parameter 2-06 Parking Current and
parameter 2-07 Parking Time.
[2] Rotor Det. w/
Parking
1-71 Start Delay
Range: Function:
0 s* [0 - 25.5 s] This parameter refers to the start
function selected in
parameter 1-72 Start Function.
Enter the time delay required
before commencing acceleration.
1-72 Start Function
Option: Function:
Select the start function during
start delay. This parameter is linked
to parameter 1-71 Start Delay.
[0] DC Hold/delay
time
Energizes motor with a DC hold
current (parameter 2-00 DC Hold
Current) during the start delay time.
[2] * Coast/delay
time
Motor coasted during the start
delay time (inverter o).
[3] Start speed
cw
Only possible with VVC
+
.
Connect the function described in
parameter 1-74 Start Speed [RPM]
and parameter 1-76 Start Current in
the start delay time.
Regardless of the value applied by
the reference signal, the output
speed applies the setting of the
start speed in parameter 1-74 Start
Speed [RPM] or parameter 1-75 Start
Speed [Hz], and the output current
corresponds to the setting of the
Parameter Descriptions Programming Guide
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