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Motor size
Change over
0.25 kW - 7.5 kW
< 10 Hz
1-61 High Speed Load Compensation
Range:
Function:
100%
*
[0 - 300%]
Enter the % value to compensate voltage in relation to load when the motor is running at high speed and obtain
the optimum U/f characteristic. The motor size determines the frequency range within which this parameter is
active.
Motor size
Change-over
0.25 kW - 7.5 kW
> 10 Hz
1-62 Slip Compensation
Range:
Function:
100%
*
[-500 - 500 %]
Enter the % value for slip compensation, to compensate for tolerances in the value of n
M,N
. Slip compensation
is calculated automatically, i.e. on the basis of the rated motor speed n
M,N
.
This function is not active when par. 1-00
Configuration Mode
is set to
Speed closed loop
[1] or
Torque
[2] Torque
control with speed feedback or when par. 1-01
Motor Control Principle
is set to
U/f
[0] special motor mode.
1-63 Slip Compensation Time Constant
Range:
Function:
0.10s
*
[0.05 - 5.00 s]
Enter the slip compensation reaction speed. A high value results in slow reaction, and a low value results in quick
reaction. If low-frequency resonance problems arise, use a longer time setting.
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 oscillation, 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 eliminate high-frequency resonance problems. Enter
the time constant 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 frequency converter
runs with constant current through motor for speeds below 10 Hz.
FC 300 Programming Guide
2. How to Programme
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
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