Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 122)

Chapter 5
Functional Description
5-36
Figure 5.5 (Sheet 3 of 3) 1395 Block Diagram
9
CURRENT REFERENCE CONTROL
FLUX COMMAND
FIELD
ECONOMY
DELAY
ARMATURE
CURRENT REF
SCALING
Torque Command 110
4096 = 100%
Rated Torque
From
Sheet 1
4096 = 1PU TORQUE
DRIVE STOPPED
FLUX
TORQUE TAPER
%
FLUX
COMPENSATION
%
TORQUE
DISABLE DIVIDE
BY FLUX
FLUX MODE SELECT
627
7
11
FIELD FLUX CONTROL
4
CEMF
121
CEMF
PI CONTROL
PI
672 KI FLUX/3277
673 KP FLUX/4096
687 CEMF PRELOAD
FLUX MODE
SELECT
627
ARM CURRENT
REF
111
FIELD
WEAKENING
SELECT 410
(10% FLUX)
AUTO
TUNE
GAIN
4096 = 1 PU FLUX
RPM
RPM
%
%
Fwd Brdg Cur Lim
663
Min Taper Cur Lim
667
Rev Brdg Cur Lim
664
Strt Taper Spd
665
End Taper Spd
666
I LIMIT
SPD
FWD I
LIMIT
REV I
LIMIT
DI/DT
LIMIT
%
DI/DT LIMIT
668
AMPS
AMP 611
MOTOR ARM FLA
AMP 615
RATED ARM BRDG I
G
+
–
ARMATURE
CURRENT
FEEDBACK
0 I = T
FWD TORQUE
LIMIT
C
REV TORQUE
LIMIT
To
Sheet 2
To
Sheet 2
B
D
1 PU
FLUX
SEC
FLD ECON
DLY 675
STOPPED = 1
FIELD
ECONOMY
SELECT
FLUX MODE SELECT
627
0
Fld Econ Ref 674 %
FLUX COMMAND
Fld Flux Ref 676 %
FLUX
MODE
SELECT
627
1
Fdbk Device Type 621
+
FLUX
FLUX FEED
FORWARD SELECT
2
5
+
FLUX MODE
SELECT
627
%
12
FIELD WEAKENING CONTROL
FLUX FEED FWD 159
CEMF
SPEED
FLUX
CALC
CEMF
SPEED
FLUX
CALC
FLUX
ERROR ERROR
+
CEMF
REFERENCE
SELECT
%
3
FLUX MODE
SELECT
627
4096
CEMF REF
MAX
RPM 686
P686 = Field Weaken Speed 4096 = Base
Mtr RPM
MAX
4096
ABS
ABS From
Sheet 2
RPM
VELOCITY
FDBK
106
A
From
Sheet 2
CEMF
FDBK
CEMF
FDBK
MOTOR FLA
BRIDGE FLASPX4
CEMF HOLD
TRIM
BYPASS INTEGRATOR
WHEN ON LIMIT
160
CEMF REF
4096 = 1PU
CEMF
F
R
M
M
= 1
≠ 1
–
1
No Flux Comp
Bit 1 = Field Weaken Enable
Bit 0 = Field Economy Enable
Bit 2 = Ext Feed Forward Enable
CEMF Control Enable
CEMF RESET