Rockwell Automation Allen-Bradley PowerFlex 755T User Manual

Rockwell Automation Publication 750-PM101B-EN-P - April 2022 65
Chapter 3 PowerFlex 755T Control Block Diagrams
Figure 44 - Load Observer
1 2 3 4 5 6
BA
D
C
FHEG
I
Load Observer (Ld Obs)
X
X
c LdObs Ki
2024
2036
LdObs Torque Est
X
LdObs Acc Ref In
0
0,3 4 1,2
LdObs Mode
2020
1,2,30,4
LdObs Vel Est
2027
1,2,3,4
2023
u LdObs Ki
c LdObs Kp
u LdObs Kp
2031
LdObs Vel Error
+
-
X
2037
LdObs Acc Ref Out
2034
2035
LdObs Accel Est
X
LdObs VelFb In
0.5
1.0
2028
Fdbk [G3]
Trq Ref [B2]
Fdbk [E3]
Trq Ref [D2]
0
Trq Ref [D3]
Trq Ref [C3]
LdObs Mode (2020):
0- Disabled 1- LdObs Only 2- LdObs VelEst 3- Vel Est Only 4- Accel Fdbk
Note:Load Observer is internally disabled in TrqReg mode or VelMode with open loop feedback
50
Calc
Acc
Trq
405 406
900 901
Mtr NP Pwr Units
Motor NP Power
Motor Inertia
Load Ratio
403
Motor NP RPM
+
-
X
2022 2021
Trq Ref Out
2072
Cur IM, SPM [E3]
Cur IPM [E3]
Active Neg Torque Limit
Active Pos
Torque Limit
51
52
1
Trq Scale
1
Trq Scale
1961
K
j
*
aVRegK
p
-----------------
Np RPM
Droop RPM at FLA
+
-
Trq Scale
TrqRefPosLimActv TrqRefNegLimActv
44 Kj
Limit
Overview VarCtrl PFC Vector Overview PRef Move Prof Ind 2 VelRefCAM Ld Obs Cur IPM MOP Logic Metering DroopCtrl CurPwrLmt Freq Overview PRef2 Roll Psn VRef Vect Friction Comp Proc 1 22Series IO Digital Invert PLL DBC CurrCtrl CBI Metering PReg Spindle Ref Move Trq RefCAM Proc 2 22Series IO Digital Motor I2T PwrLoss VoltRefGen LscCtrlCfg Fdbk Psn PLL VRef Overview VReg Vect Trq Ref AntiSway 11-Series IO Digital High Speed Wizard LscData VoltCtrl DriveDerating Homing Psn CAM VRef Sel Trq Overview Trq Filt Oil Well 1 22-Series IO Analog CurRefGen DCBusObs PRef1 Prof Ind 1 VRef All Trq Ref Sel Cur IM SPM Oil Well 2 22-Series IO Analog Ld Obs

Rockwell Automation Allen-Bradley PowerFlex 755T Specifications

General

Brand	Rockwell Automation
Model	Allen-Bradley PowerFlex 755T
Category	DC Drives
Language	English