Lenze i950

7.11 Acceleraon
compensaon
The acceleraon in the line speed setpoint constutes a disturbance in the winding process.
The torque that needs to be supplied for acceleraon is missing for the tensile force. The
acceleraon torque must be calculated and pilot-controlled as addional torque.
The eecve addional torque which results from the acceleraon feedforward control is
read o via the parameter Acceleraon compensaon set torque in [Nm] or via the parame-
ter Eecve acceleraon compensaon set torque in [%].
Parameters for the acceleraon compensaon:
•
Acceleraon compensaon set torque40x5051:124
•
Eecve acceleraon compensaon set torque40x5051:125
d
J
M
0
V
Acc-Comp.: PT1 filter
time line velocity
0x5051:120
Actual diameter
0x5051:096
J adaption
0x5051:119
Actual moment of inertia
0x5051:110
Actual line velocity
0x5051:009
Control Signals
0x5050:010 Bit 26
Constant moment of inertia
0x5051:111
Max. moment of inertia
0x5051:112
Dead-band accelration torque
0x5051:121
Gain acc torque positve
0x5051:122
Gain acc torque negative
0x5051:123
Scaled torq setp
from AccComp
0x5051:125
Torque setpoint
from AccComp
0x5051:124
d
dt
w
dv
dt
´
´
1
d p
M J
d
dt
= ´
w
Fig. 53: Dialogue overview "Acceleraon
compensaon"
To calculate the acceleraon, the line speed has to be dierenated. Via a PT1 funconality,
uneven speed signals are smoothed before dierenaon. The PT1 me constant is cong-
ured via the parameter Filter me acceleraon compensaon. 40x5051:120
For noise suppression, a dead band funcon must be interconnected via the cal-
cula
ted acceleraon torque.
How to prepare the
acceleraon compensaon:
•
•
The v
alues can be found in the DSD report.
1.
Set the parameter Max. moment of inera of the winding sha. 40x5051:112
2.
Se
t the parameter Constant moment of inera of the motor. 40x5051:111
The acceleraon
compensaon has now been prepared.
The motor moment of inera typically dominates. The moments of inera Con-
s
tant moment of inera and Motor moment of inera are not equal.
Conguring the "Winder Dancer" TA
Acceleraon compensaon
133