Allen-Bradley PowerFlex 70 - Page 66

2-38 Block Diagrams
Figure 2.5 PowerFlex 700VC Block Diagams (5)
447
446 445
+
121
416
152
Speed Control - Regulator
(1.0 ms)
Droop
23
25
621
P Gain
kp
I Gain
ki
s
Limit
Kp Speed Loop
Ki Speed Loop
Slip RPM @ FLA
FeedFwd
kf
Speed Feedback
Speed Reference
Kf Speed Loop
Droop RPM @FLA
Fdbk Filter Sel
from Speed Cntrl Ref
[4H4]
To Torque Control Ref
[6A1]
Testpoint 621
+
-
+
-
+
-
Lead Lag
620 Testpoint 620
Lead Lag
416
Fdbk Filter Sel
2
nd
Order LPass
Filter
ks +
s +
2
s
2
+ 2 s
+
2
ks +
s +
ω
ω
ω
ω
ω
ω