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b
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se
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m
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rd
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K
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w
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r
d
:
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r
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s
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[
4
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9
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.
A
b
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1
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ter
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ap
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.
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h
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n
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l
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t
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in
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atic
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a
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ter
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t c
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h
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lt
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r
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ig
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M
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Fig
u
r
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S
y
s
te
m
Bl
o
ck
Dia
g
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m
2.
I
NT
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ter
l
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t
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ter
s
h
o
w
n
in
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i
g
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r
e
2
.
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h
e
in
ter
l
ea
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t
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o
n
v
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ter
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n
s
is
t
s
o
f
t
w
o
b
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s
t
co
n
v
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ter
s
co
n
n
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ted
in
p
ar
allel
co
n
tr
o
lled
by
p
h
as
e
-
s
h
i
f
ted
s
w
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i
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n
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.
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h
e
s
w
itc
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n
g
o
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o
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th
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ter
l
ea
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ed
b
o
o
s
t c
o
n
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ter
s
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w
n
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ig
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r
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3.
I
n
th
i
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ap
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we
h
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ter
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1
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0
0
.
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s
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m
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p
ar
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in
cr
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s
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e
p
h
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e
s
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i
f
t a
n
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d
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c
v
o
L
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D
d
1
d
2
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1
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2
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1
v
i
n
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u
r
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3
.
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im
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tr
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u
r
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2
.
I
n
ter
leav
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B
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t D
C
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DC
C
o
n
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ter
T
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in
d
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s
L
1
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d
L
2
ar
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m
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s
.
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t
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c
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o
f
S
1
w
as
d
e
n
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ted
b
y
D1
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k
e
f
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S2
as
D2
.
T
h
e
d
u
t
y
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v
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u
es
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f
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w
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eq
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ale
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D.
T
h
e
o
p
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m
o
d
e
o
f
th
e
co
n
v
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ter
c
an
b
e
ex
p
lain
ed
as:
a.
Stag
e
I
:
C
u
r
r
en
ts
th
r
o
u
g
h
i
n
d
u
cto
r
L
1
s
tar
t
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to
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h
ile
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th
r
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L
2
wh
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tch
S1
is
clo
s
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d
S2
is
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p
en
ed
at
ti
m
e
T
0
.
b.
Stag
e
I
I
:
C
u
r
r
en
ts
th
r
o
u
g
h
in
d
u
cto
r
L
1
s
tar
ts
to
d
is
ch
ar
g
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th
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2
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lo
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n
s
w
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d
S2
ar
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o
p
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at
tim
e
T
1
.
T
T
1
8
0
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S
1
S
1
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2
S
2
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3
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6
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837
c.
Stag
e
I
I
I
:
C
u
r
r
e
n
ts
t
h
r
o
u
g
h
i
n
d
u
cto
r
L
2
s
tar
t
s
to
r
is
e
w
h
i
le
b
ein
g
d
is
c
h
ar
g
ed
th
r
o
u
g
h
L
1
w
h
e
n
s
w
itc
h
S2
is
clo
s
ed
an
d
S1
is
o
p
en
ed
at
ti
m
e
T
2
.
d.
Stag
e
I
V
: C
u
r
r
en
t
s
t
h
r
o
u
g
h
in
d
u
cto
r
L
1
s
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ts
to
d
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c
h
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g
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a
ls
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d
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ar
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h
r
o
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g
h
L
2
t
h
r
o
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g
h
lo
ad
w
h
e
n
s
w
i
tch
S1
a
n
d
S2
ar
e
o
p
en
ed
at
tim
e
T
3
s
a
m
e
as l
ik
e
in
m
o
d
e
I
I
.
T
h
e
c
y
cle
th
e
n
r
ep
ea
ts
.
3.
I
NDUC
T
I
O
N
M
O
T
O
R
T
h
e
in
d
u
ct
io
n
m
o
to
r
is
w
ell
-
k
n
o
w
n
f
o
r
it
s
s
i
m
p
le
a
n
d
r
o
b
u
s
t
co
n
s
tr
u
ctio
n
.
I
ts
lo
w
co
s
t
h
a
s
f
o
u
n
d
v
er
y
w
id
e
r
a
n
g
e
o
f
i
n
d
u
s
tr
ial
ap
p
l
ica
tio
n
s
.
A
D
C
m
o
to
r
u
s
e
s
co
m
m
u
tato
r
an
d
th
er
e
i
s
a
p
r
o
b
lem
o
f
o
cc
u
r
r
in
g
s
p
ar
k
s
,
d
u
e
to
t
h
i
s
r
ea
s
o
n
t
h
i
s
D
C
m
o
to
r
ca
n
n
o
t
b
e
u
s
ed
i
n
p
o
llu
ted
en
v
ir
o
n
m
e
n
ts
.
W
h
er
ea
s
an
in
d
u
ctio
n
m
o
to
r
d
o
esn
’
t
co
n
s
is
t
s
o
f
a
n
y
co
m
m
u
ta
to
r
s
an
d
ca
n
b
e
u
s
ed
in
v
er
s
atile
e
n
v
ir
o
n
m
e
n
t
s
.
T
h
ese
ad
v
an
ta
g
es
m
ak
e
s
i
n
d
u
ct
io
n
m
o
to
r
to
m
ad
e
u
s
ed
in
s
p
ee
d
r
eg
u
lated
in
d
u
s
tr
ial
d
r
iv
e
s
y
s
te
m
s
.
Als
o
th
er
e
ex
i
s
ts
s
o
m
e
tech
n
ical
p
r
o
b
lem
s
w
h
i
le
u
s
i
n
g
i
n
d
u
ct
io
n
m
o
to
r
d
r
iv
e
s
i
n
ce
it
r
eq
u
ir
es
t
w
o
s
ta
g
es
o
f
co
n
v
er
s
io
n
(
ac
-
d
c
an
d
d
c
-
ac
)
i
n
V/
F
co
n
tr
o
l
s
ch
e
m
e
th
e
s
p
ee
d
.
Her
e
a
R
e
v
er
s
i
n
g
Vo
ltag
e
to
p
o
lo
g
y
i
n
5
lev
el
an
d
7
lev
el
elec
tr
ical
co
n
v
e
r
ter
is
en
f
o
r
ce
d
f
o
r
in
d
u
ctio
n
m
o
to
r
lo
ad
th
at
h
a
s
s
u
p
er
io
r
ch
ar
ac
ter
is
tic
s
o
v
er
an
cien
t
to
p
o
lo
g
ies
in
ter
m
s
o
f
ne
ed
ed
ele
m
en
ts
as
s
w
i
tch
es,
v
o
lta
g
e
lev
el
in
g
,
m
a
n
a
g
e
m
e
n
t
n
ec
e
s
s
i
ties
an
d
r
esp
o
n
s
ib
ilit
y
.
Her
e
SP
W
M
co
n
tr
o
ller
h
as les
s
co
m
p
lex
n
es
s
.
3
.
1
.
Dy
na
m
ic
M
o
delin
g
o
f
I
nd
uc
t
io
n
M
o
t
o
r
T
h
er
e
ar
e
tw
o
s
ets
o
f
id
en
t
ic
al
v
o
lta
g
e
p
r
o
f
ile
w
i
n
d
in
g
s
o
u
t
o
f
to
tal
w
i
n
d
in
g
s
i
n
a
n
ex
c
ee
d
in
g
l
y
t
y
p
ical
f
o
u
r
p
o
le
m
ac
h
i
n
e.
T
h
ese
t
w
o
s
et
s
o
f
w
i
n
d
in
g
s
ar
e
c
o
n
n
ec
ted
i
n
n
o
n
-
p
ar
allel
as
s
h
o
w
n
i
n
F
ig
u
r
e
4
(
a)
.
Fo
r
th
e
p
r
o
p
o
s
ed
in
v
er
ter
t
h
es
e
t
w
o
id
en
tical
v
o
lta
g
e
p
r
o
f
ile
w
i
n
d
i
n
g
co
il
s
ar
e
d
is
co
n
n
ec
te
d
,
an
d
th
e
r
e
f
o
r
e
th
e
o
b
tain
ab
le
f
o
u
r
ter
m
i
n
als
ar
e
tak
en
o
u
t,
lik
e
s
h
o
w
n
w
it
h
in
th
e
F
ig
u
r
e
4
(b
)
.
Sin
ce
th
ese
t
w
o
w
in
d
i
n
g
s
ar
e
s
ep
ar
ated
eq
u
all
y
,
s
tato
r
r
esis
t
an
ce
,
s
tato
r
i
n
d
u
cta
n
ce
a
n
d
th
e
r
ef
o
r
e
m
ag
n
etiz
in
g
i
n
d
u
cta
n
c
e
o
f
ev
er
y
id
en
t
ical
v
o
ltag
e
p
r
o
f
ile
w
i
n
d
in
g
s
ar
e
c
ap
ab
le
th
e
1
/2
th
e
n
o
r
m
al
i
n
d
u
cti
o
n
m
o
to
r
s
h
o
w
n
i
n
F
ig
u
r
e
4
(
a)
.
T
h
e
v
o
ltag
e
eq
u
a
tio
n
f
o
r
th
e
m
ec
h
a
n
ical
d
ev
ice
w
i
n
d
in
g
is
g
i
v
en
b
y
co
m
m
o
n
d
c
lin
k
.
(
)
(
)
(
)
(
)
(
)
(
)
(
1
)
(
)
(
)
(
)
(
)
(
)
(
)
(
2
)
Fig
u
r
e
4
.
Stato
r
w
i
n
d
in
g
o
f
I
n
d
u
ctio
n
Mo
to
r
: (
a)
B
asic a
r
r
an
g
e
m
e
n
t (
b
)
A
r
r
an
g
e
m
e
n
t f
o
r
t
h
e
p
r
o
p
o
s
ed
in
v
er
ter
T
h
e
ef
f
ec
ti
v
e
v
o
lta
g
e
o
v
er
t
h
e
s
tato
r
w
i
n
d
in
g
i
s
th
e
s
u
m
o
f
t
h
e
v
o
ltag
e
s
o
v
er
th
e
t
w
o
i
n
d
iv
i
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