
384 Rockwell Automation Publication 750-PM001J-EN-P - October 2014
Appendix A PowerFlex 753 Control Block Diagrams
Figure 20 - Torque Control - Current (IPM)
1
2
3
4
5
6
BA
D
C
FE HG
I
Power
Unit
Thermal
Protection
Pos Torque Limit
{Trq Neg Lmt}
Neg Torque Limit
{Trq Pos Lmt}
Regen Power Lmt
{Regen PwrLmt}
Bus
Regulator
Calc
Pwr
Te
Active Vel Fdbk
Active Pos
Torque Limit
Active Neg
Torque Limit
Limit
Max
Min
Filtered Trq
Ref
Limited Trq
Ref
Active Cur Lmt
Limit
Motor Power Lmt
{Mtrng PwrLmt}
Voltage Ref/
Limit
Generation
Current Lmt 1
Current Lmt Sel
Current Lmt 2
Thermal Mgr Current Limit
424
421
422
423
690689
+
+
131
426
427
671
670
945
21
At Limit Status
22
Trq Pos Lmt
Trq Neg Lmt
945 17
At Limit Status
18
TrqCurPosLmt
TrqCurNegLmt
Flux Vector
Parameter
Selection
From Fdbk
[3F2]
[30D2]
From Torq
Ctrl
[17H2]
[3C6]
-1
23
24
Mtrng PwrLmt
Regen PwrLmt
25
26
Cur Lmt FV
Therm RegLmt
27
28
BusVltgFVLmt
Mtr Vltg Lkg
{BusVltgFVLmt}
{Mtr Vltg Lkg}
{Cur Lmt FV}
{Therm RegLmt}
PF753 Rev_10.a
Page 18b
Iq
Current
Ref
Id
Current
Ref
Te
Id
Calc
Voltage
Limit
Te
Iq
Calc
Id
Rate Lim
Current Rate Lmt
425
Limit
Calc
Is,Id
Iq
Torque Control – Current
Interior Permanent Magnet motor (IPM)
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