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
B
A
D
C
FH
EG
I
Lo
ad Ob
serve
r
(L
d Ob
s)
X
X
c
LdO
bs
Ki
20
24
20
36
L
d
O
b
s To
rq
ue
E
st
X
Ld
Obs
Ac
c
Ref
I
n
0
0,
3
4
1,
2
Ld
Obs
Mod
e
202
0
1,
2,
3
0,
4
Ld
Obs
Ve
l E
st
202
7
1,
2,
3,
4
20
23
u LdO
bs
K
i
c
LdO
bs
K
p
u LdO
bs
K
p
20
31
Ld
Obs
Ve
l E
rror
+
-
X
20
37
L
d
Ob
s
A
cc R
e
f Ou
t
20
34
20
35
L
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l
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t
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L
d
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e
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b
In
0.
5
1.
0
20
28
F
dbk
[
G
3
]
T
rq R
ef [B
2]
F
dbk
[E
3
]
T
rq
R
e
f
[D2
]
0
T
rq
R
e
f
[D3
]
Tr
q
R
e
f
[C
3]
L
d
O
b
s M
o
de
(2
02
0):
0- Di
sa
bl
ed
1- LdO
b
s
O
n
ly
2- LdO
b
s
V
e
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st
3- V
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O
n
ly
4- Acce
l
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er
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back
50
Ca
lc
Ac
c
Tr
q
40
5
40
6
900
901
M
tr N
P
P
w
r Un
its
Mot
o
r NP
Power
Mo
to
r I
n
e
rtia
Lo
ad Rat
io
403
Mot
o
r NP
R
P
M
+
-
X
20
22
20
21
Tr
q
R
e
f
Ou
t
20
72
Cu
r IM, SP
M
[E
3]
Cu
r IPM
[E
3]
Ac
ti
ve N
e
g
To
rq
ue L
im
it
Ac
ti
ve Po
s
To
rq
ue L
im
it
51
52
1
Tr
q
S
cale
1
Tr
q
S
cale
196
1
K
j
*
a
V
RegK
p
---
-----
---
--
----
Np R
P
M
Dro
o
p
RP
M
at
FL
A
+
-
Tr
q S
cal
e
T
rq
R
e
fPo
sL
im
Ac
tv
T
rq
R
ef
N
e
g
L
im
Ac
tv
44
K
j
Li
m
it
trl
s
ef
y
trl
l
ilt
s
l
el
Ld
O
bs