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
11 kW - 45 kW < 5 Hz
55 kW - 550 kW < 3-4 Hz
1-62 Slip Compensation
Range: Function:
0%
*
[-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
.
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.
3.3.6. 1-7* Start Adjustments
Parameters for setting special motor start features.
3. Parameter Description VLT
®
HVAC Drive Programming Guide
44
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
3
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