Danfoss VLT AutomationDrive FC 300 Design Manual page 146

FC 300 Design Guide
1-61 High Speed Load Compensation
Range:
-300 - 300%
Function:
Enables compensation of voltage in relation to
load when the motor is running at high speed.
Optimum U/f characteristic is obtained. The
frequency range within which this parameter is
active, depends on the motor size.
Motor size
0.34 - 10 HP (0.25 kW -
7.5 kW)
1-62 Slip Compensation
Range:
-500 - 500 %
Function:
Slip compensation is calculated automatically,
i.e. on the basis of the rated motor speed n
In par. 1-62, slip compensation is adjusted in
detail, which compensates for tolerances in the
value of n . This function is not active along
M,N
with Torque Characteristics (par. 1-03), Speed
closed loop, Torque control, Speed feedback,
and Special motor characteristics.
Enter a %-value of the rated motor
frequency (par. 1-23).
1-63 Slip Compensation Time Constant
Range:
0.05 - 5.00 s
default setting ( ) display text
*
146
How to Program
*
100%
Changeover
> 10 Hz
*
100%
.
M,N
*
0.10s
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
Function:
Determines the slip compensation reaction
speed. A high value results in slow reaction.
On the other hand, a low value results in quick
reaction. If low-frequency resonance problems are
encountered, the set time must be longer.
1-64 Resonance Dampening
Range:
0 - 500 %
Function:
Setting par. 1-64 and par. 1-65 can eliminate
high-frequency resonance problems. For
less resonance oscillation, the value of par.
1-64 must be increased.
1-65 Resonance Dampening Time Constant
Range:
5 - 50 msec.
Function:
Setting par. 1-64 and par. 1-65 can eliminate
high-frequency resonance problems. Choose the
time constant that provides the best dampening.
1-66 Min. Current at Low Speed
Range:
0 - Variable Limit %
Function:
Is enabled when par. 1-00 = SPEED OPEN
LOOP only. The drive runs with constant current
through motor below 10 Hz.
When speed is above 10 Hz, the motor flux model in
the drive controls the motor. Par. 4-16 and / or par.
4-17 automatically adjusts 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
generating current and the magnetizing current.
Example: Par. 4-16 Torque Limit for Motor
Mode is set to 100% and par. 4-17 Torque
Limit for Generating Mode is set to 60%.
Par. 1-66 automatically sets to about 127%,
depending on the motor size.
1-67 Load Type
Option:
*
Passive load
Active load
*
100%
*
5 msec.
*
100%
[0]
[1]