Danfoss VLT AutomationDrive FC 302 Programming Manual page 50

Parameter Descriptions
NOTICE
Parameter 1-63 Slip Compensation Time Constant has no
effect when 1-10 Motor Construction = [1] PM, non salient
SPM.
3 3
1-64 Resonance Dampening
Range:
100 [0 -
% 500 %]
*
NOTICE
Parameter 1-64 Resonance Dampening has no effect when
1-10 Motor Construction = [1] PM, non salient SPM.
1-65 Resonance Dampening Time Constant
Range:
5 ms [5 - 50
*
ms]
NOTICE
Parameter 1-65 Resonance Dampening Time Constant has
no effect when 1-10 Motor Construction = [1] PM, non
salient SPM.
1-66 Min. Current at Low Speed
This parameter is valid for FC 302 only.
Range:
Size
related 200 %]
*
48
Function:
Enter the resonance dampening value. Set
parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant to help eliminate high-frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1-64 Resonance Dampening.
Function:
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.
Function:
[ 1 - 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 Configu-
ration Mode [0] Speed open loop only. The
frequency converter runs with constant
current through motor for speeds below
10 Hz.
For speeds above 10 Hz, the motor flux
model in the frequency converter controls
the motor. 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
®
VLT AutomationDrive FC 301/302 Programming Guide
1-66 Min. Current at Low Speed
This parameter is valid for FC 302 only.
Range:
1-67 Load Type
This parameter is valid for FC 302 only.
Option:
[0] Passive load For conveyers, fan and pump applications.
*
[1] Active load
1-68 Minimum Inertia
Range:
Size
related
*
1-69 Maximum Inertia
Range:
Size
related
*
MG33MI02 - Rev. 2013-11-20
Function:
parameter 1-66 Min. Current at Low Speed is
composed of the torque generating
current and the magnetising 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.
FC 302 only.
Function:
For hoisting applications, used in slip
compensation at low speed. When [1] Active
Load is selected, set parameter 1-66 Min.
Current at Low Speed to a level which
corresponds to maximum torque.
Function:
NOTICE
[ 0.0001 -
par. 1-69
This parameter cannot be adjusted
kgm²]
while motor is running.
Needed for average inertia calculation.
Enter the minimum moment of inertia of
the mechanical system.
Parameter 1-68 Minimum Inertia and
parameter 1-69 Maximum Inertia are used
for pre-adjustment of the Proportional
Gain in the speed control, see
parameter 30-83 Speed PID Proportional
Gain.
FC 302 only.
Function:
NOTICE
[ par. 1-68 -
0.4800
This parameter cannot be
kgm²]
adjusted while motor is running.
Active in Flux Open Loop only. Used
to compute the acceleration torque at
low speed. Used in the torque limit
controller.
FC 302 only.