1-61 High Speed Load Compensation
Range:
Function:
100 %*
[0 - 300 %]
Enter the % value to compensate voltage in relation to load while the motor is running at high
speed, and obtain the optimum U/f characteristic. The motor size determines the frequency ranges
within which this parameter is active.
Motor size
Change-over
0.3–10 hp [0.25–7.5 kW]
> 10 Hz
15–60 hp [11–45 kW]
< 5 Hz
75-738 hp [55-550 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:
0.10 s*
[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
to help eliminate high-frequency resonance problems. To reduce reso-
nance oscillation, increase the value of par.1-64
1-65 Resonance Dampening Time Constant
Range:
Function:
5 ms*
[5 - 50 ms]
Set par.1-64
Resonance Dampening Time Constant
to help
eliminate high-frequency resonance problems. Enter the time constant that provides the best damp-
ening.
VLT
®
HVAC Drive Programming Guide
3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3-25
3