Rockwell-automation 21G PowerFlex 750-Series AC Drives Programming Man Manual de usuario Pagina 427

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Rockwell Automation Publication 750-PM001J-EN-P - October 2014 427
PowerFlex 755 Control Block Diagrams Appendix A
Figure 61 - Torque Control - Load Observer / Estimator
1
2
3
4
5
6
BA
D
C
FE HG
I
76
711
Load Observer BW
LPass
Filter
Total Inertia
Load
Observer
704
2
InAdp LdObs Mode
X
LPass
Filter
707
Load
Estimate
10 R/S
0
Else
0
1
Else
Speed Sensor
Type
Sensorless
Torque Control – Load Observer / Estimator
Load Observer / Estimator
Limit
Pos Torque Limit
Torque
Limits
Neg Torque Limit
Notch Filter
Output
Limited
Trq Ref
FIR
Filter
Primary
Encoder
Position
Filtered
Trq Ref
690689
Derivative
d
dt
Drive Status 2
(Fdbk Loss Sw0)
1
0
Motor Acceleration Feedback
1
Total Inertia
System Model
936 5
709
IA LdObs
Delay
FIR
Filter
Alternate
Encoder
Position
Derivative
d
dt
Velocity
Velocity
Accel
Accel
670
671
From Fdbk
[3E3]
[23H2]
[24a E2], [24b E2]
[3E1]
[23G3]
***INTERNAL CONDITION ONLY***
PF755 Rev_10.a
Page 26
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