ABB ACS880-104

276 Parameters
25.25 Torque adapt max
limit
Maximum torque reference for speed controller adaptation.
Speed controller gain can be adapted according to the final
unlimited torque reference (26.01 Torque reference to TC).
This can be used to smooth out disturbances caused by a
small load and backlashes.
The functionality involves multiplying the gain (25.02 Speed
proportional gain) by a coefficient within a certain torque
range.
When the torque reference is 0%, the gain is multiplied by the
value of parameter 25.27 Kp adapt coef at min torque.
When the torque reference is equal to or above 25.25 Torque
adapt max limit, no adaptation takes place (the coefficient is
1).
Between 0% and 25.25 Torque adapt max limit, the
coefficient for the gain is calculated linearly on the basis of
the breakpoints.
Filtering can be applied on the torque reference using
parameter 25.26 Torque adapt filt time.
See also the block diagram on page 650.
0.0%
0.0 … 1600.0% Maximum torque reference for speed controller adaptation. See par.
46.03
25.26 Torque adapt filt
time
Defines a filter time constant for the adaptation, in effect
adjusting the rate of change of the gain.
See parameter 25.25 Torque adapt max limit.
0.000 s
0.000 … 100.000 s Filter time for adaptation. 100 = 1 s
25.27 Kp adapt coef at
min torque
Proportional gain coefficient at 0% torque reference.
See parameter 25.25 Torque adapt max limit.
1.000
0.000 … 10.000 Proportional gain coefficient at 0% torque reference. 1000 = 1
No. Name/Value Description Def/FbEq16
Coefficient for K
p
(proportional gain)
Final torque reference
(26.01) (rpm)
25.25 Torque
adapt max limit
1.000
0
25.27 Kp adapt coef at min torque