1-64 Resonance Dampening
Range: Function:
100%
*
[0 - 500 %] Enter the resonance dampening value. Set par. 1-64 and par.
1-65
Resonance Dampening Time Constant
to help eliminate
high-frequency resonance problems. To reduce resonance os-
cillation, increase the value of par. 1-64.
1-65 Resonance Dampening Time Constant
Range: Function:
5
msec.
*
[5 - 50 msec.] Set par. 1-64
Resonance Dampening
and par. 1-65 to help elim-
inate high-frequency resonance problems. Enter the time con-
stant that provides the best dampening.
1-66 Min. Current at Low Speed
Range: Function:
100%
*
[0 - 200%] Enter the minimum motor current at low speed, see par. 1-53
Model Shift Frequency
. Increasing this current improves motor
torque at low speed.
Par. 1-66 is enabled when par. 1-00
Configuration Mode =
Speed open loop
[0] only. The drive runs with constant current
through motor for speeds below 10 Hz.
For speeds above 10 Hz, the motor flux model in the drive con-
trols the motor. Par. 4-16
Torque Limit Motor Mode
and / or par.
4-17
Torque Limit Generator Mode
automatically adjust par.
1-66. The parameter with the highest value adjusts par. 1-66.
The current setting in par. 1-66 is composed of the torque gen-
erating current and the magnetizing current.
Example: Set par. 4-16
Torque Limit for Motor Mode
to 100%
and set par. 4-17
Torque Limit for Generating Mode
to 60%.
Par. 1-66 automatically adjusts to about 127%, depending on
the motor size.
This parameter is available for FC 302 only.
1-67 Load Type
Option: Function:
[0]
*
Passive load For conveyers, fan and pump applications.
[1] Active Load For hoisting applications. When
Active Load
[1] is selected, set
par. 1-66 Min. Current at Low Speed to a level which corre-
sponds to maximum torque.
This parameter is available for FC 302 only.
1-68 Minimum Inertia
Range: Function:
0.0048
*
[0.0001 - Par. 1-69] Enter the minimum moment of inertia of the mechanical system.
Par. 1-68 and par. 1-69
Maximum Inertia
are used for pre-ad-
justment of the Proportional Gain in the speed control, see par.
7-02
Speed PID Proportional Gain
.
This parameter is available for FC 302 only.
2. How to Programme FC 300 Programming Guide
54
MG.33.M2.02 - VLT
®
is a registered Danfoss trademark
2
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