Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 310)

5-2 Functional Description
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
Description of Operation
A complete block diagram of the PF7000 control circuit is shown
below. The major blocks are described in the following sections.
Mo
to
r
Mo
to
r
Mo
de
l
Lin
e
Pr
ot
ec
tion
Ma
ch
in
e
Co
nv
er
te
r
Lin
e
Co
nv
er
te
r
DC
L
ink
ind
uc
to
r
Mo
to
r f
ilt
er
ca
p
Ma
ch
in
e
side
fe
ed
ba
ck
a
nd
ga
ting
Lin
e
side
fe
ed
ba
ck
an
d
ga
tin
g
Flux an gle
Alp
ha
ma
ch
in
e
Ix comma nd
Iyc omma nd
Lin
e
fil
te
r
ca
p
AC Lin
e
re
ac
to
r
Id
c
Fe
ed
ba
ck
Lin
e
vo
lta
ge
So
ur
ce
Ta
ch
Fe
ed
ba
ck
Sli
p
fre
q
St
at
or
fr
eq
Sp
ee
d
Co
nt
ro
l
Sy
nc
Tr
an
sf
er
Flux Co
nt
ro
l
Cu
rre
nt
Co
nt
ro
l
Alp
ha
lin
e
Ma
ch
in
e
Pr
ot
ec
tion
Lin
e
cu
rre
nt
Mo
to
r
vo
lta
ge
Mo
to
r
cu
rre
nt
Sp
ee
d
fe
ed
ba
ck
Flux
fe
ed
ba
ck Fa
ult
s
Fa
ult
s
Sp
ee
d
Re
fe
re
nc
e
Sp
ee
d
Co
m
ma
nd
Mo
to
r
Mo
to
r
Mo
de
l
Lin
e
Pr
ot
ec
tion
Ma
ch
in
e
Co
nv
er
te
r
Lin
e
Co
nv
er
te
r
DC
L
ink
ind
uc
to
r
Mo
to
r f
ilt
er
ca
p
Ma
ch
in
e
side
fe
ed
ba
ck
a
nd
ga
ting
Lin
e
side
fe
ed
ba
ck
an
d
ga
tin
g
Flux an gle
Alp
ha
ma
ch
in
e
Ix comma nd
Iyc omma nd
Lin
e
fil
te
r
ca
p
AC Lin
e
re
ac
to
r
Id
c
Fe
ed
ba
ck
Lin
e
vo
lta
ge
So
ur
ce
Ta
ch
Fe
ed
ba
ck
Sli
p
fre
q
St
at
or
fr
eq
Sp
ee
d
Co
nt
ro
l
Sy
nc
Tr
an
sf
er
Flux Co
nt
ro
l
Cu
rre
nt
Co
nt
ro
l
Alp
ha
lin
e
Ma
ch
in
e
Pr
ot
ec
tion
Lin
e
cu
rre
nt
Mo
to
r
vo
lta
ge
Mo
to
r
cu
rre
nt
Sp
ee
d
fe
ed
ba
ck
Flux
fe
ed
ba
ck Fa
ult
s
Fa
ult
s
Sp
ee
d
Re
fe
re
nc
e
Sp
ee
d
Co
m
ma
nd
Figure 5.1 – Functional Block Diagram of PF 7000 control system