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at
p
r
ev
e
n
t
t
h
e
m
to
ac
h
ie
v
e
m
ax
i
m
u
m
p
er
f
o
r
m
a
n
ce
s
esp
e
ciall
y
at
m
ax
i
m
u
m
cu
r
r
en
t
d
e
n
s
it
y
.
T
o
im
p
r
o
v
e
th
e
d
esi
g
n
d
r
a
w
b
ac
k
s
,
d
esi
g
n
o
p
tim
izatio
n
b
y
d
eter
m
in
i
s
tic
o
p
tim
izatio
n
m
et
h
o
d
(
DOM
)
w
er
e
co
n
d
u
cted
.
T
h
e
p
r
o
p
o
s
e
d
in
itial
d
esi
g
n
ar
e
illu
s
tr
ated
in
F
ig
u
r
e
3
(
a)
.
I
n
th
e
m
ea
n
ti
m
e,
F
ig
u
r
e
3
(
b
)
s
h
o
w
s
th
e
d
es
ig
n
a
f
ter
o
p
ti
m
izati
o
n
tak
e
p
lace
.
T
h
e
s
tu
d
y
o
n
o
p
ti
m
iza
tio
n
s
h
all
b
e
d
o
n
e
to
en
s
u
r
e
t
h
e
o
p
ti
m
u
m
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
d
esi
g
n
w
i
th
n
e
w
s
tr
u
c
tu
r
e
to
g
iv
e
h
i
g
h
er
o
u
tp
u
t to
r
q
u
e
an
d
p
o
w
er
.
Fig
u
r
e
1
.
C
lass
if
ica
tio
n
o
f
F
lu
x
S
w
itc
h
i
n
g
Mo
to
r
(
FS
M)
Fig
u
r
e
2
.
I
n
itial d
esi
g
n
o
f
1
2
S
-
1
4
P
FEFSM
Fig
u
r
e
3
.
(
a)
I
n
itial d
esig
n
o
f
1
2
Slo
t
-
1
4
P
o
le
OR
-
FEFSM
(
b
)
Op
ti
m
ized
d
esig
n
o
f
1
2
Slo
t
-
1
4
P
o
le
OR
-
FEFSM
F
l
u
x
S
w
i
t
c
h
i
n
g
M
o
t
o
r
(
F
S
M
)
P
e
r
man
e
n
t
M
a
g
n
e
t
(
P
M
)
F
S
M
P
e
r
man
e
n
t
M
a
g
n
e
t
Ex
c
i
t
a
t
i
o
n
F
i
e
l
d
Ex
c
i
t
a
t
i
o
n
(
F
E)
F
S
M
D
C
F
i
e
l
d
Ex
c
i
t
a
t
i
o
n
H
y
b
r
i
d
Ex
c
i
t
a
t
i
o
n
(
H
E)
F
S
M
P
e
r
man
e
n
t
M
a
g
n
e
t
a
n
d
D
C
F
i
e
l
d
Ex
c
i
t
a
t
i
o
n
2
6
4
6
0
0
.
8
2
1
9
.
1
2
S
t
a
t
o
r
S
h
a
f
t
Ar
m
a
t
ur
e
C
oil
FE
C
R
o
t
o
r
26
6
0
0.
219.
12
Sh
a
f
t
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
SS
N:
2088
-
8
694
Desig
n
I
mp
r
o
ve
men
t o
f Th
r
ee
P
h
a
s
e
1
2
S
l
o
t
-
1
4
P
o
le
O
u
ter R
o
to
r
F
ield
E
xc
ita
tio
n
.
.
.
.
(
S
.
M.
N
.
S
.
Oth
ma
n
)
241
2.
RE
S
E
ARCH
M
E
T
H
O
DO
L
O
G
Y
Desig
n
i
m
p
r
o
v
e
m
en
t
is
co
n
d
u
cted
b
y
u
p
d
atin
g
s
e
v
en
in
d
i
v
id
u
al
p
ar
a
m
eter
s
id
en
ti
f
ied
as
P
1
to
P6
.
T
h
is
P
1
-
P6
d
esig
n
p
ar
am
e
ter
s
ar
e
s
en
s
itiv
e
to
w
ar
d
s
th
e
i
m
p
r
o
v
e
m
e
n
t
o
f
m
ac
h
i
n
e
p
er
f
o
r
m
an
ce
an
d
d
ef
in
ed
i
n
t
w
o
m
aj
o
r
p
a
r
t,
th
e
r
o
to
r
an
d
s
tato
r
p
ar
t.
T
h
en
t
h
e
d
esi
g
n
p
ar
a
m
eter
ar
e
d
iv
id
ed
in
th
r
ee
g
r
o
u
p
f
o
r
ap
p
ly
in
g
d
eter
m
in
i
s
tic
m
eth
o
d
,
s
u
c
h
a
s
r
o
to
r
p
ar
am
eter
(
P
1
-
P
3
)
,
DC
-
FEC
p
ar
a
m
eter
(
P
4
-
P
5
)
an
d
ar
m
a
t
u
r
e
co
il,
AC
p
ar
am
eter
(
P
6
)
an
d
all
th
e
d
esi
g
n
p
ar
a
m
e
ter
ca
n
b
e
illu
s
tr
ate
d
in
Fig
u
r
e
4
.
Fig
u
r
e
4
.
De
s
ig
n
p
ar
a
m
eter
d
ef
i
n
ed
as P
1
-
P6
2
.
1
.
D
esig
n I
m
p
ro
v
e
m
ent
P
ro
ce
s
s
Fig
u
r
e
5
s
h
o
w
s
th
e
c
y
cle
o
f
d
esig
n
i
m
p
r
o
v
e
m
en
t
f
o
r
th
is
d
esi
g
n
.
T
h
is
m
e
th
o
d
is
ex
ec
u
ted
co
n
s
ec
u
tiv
e
l
y
to
th
e
d
esi
g
n
u
n
til
ac
h
iv
e
an
o
p
ti
m
u
m
p
er
f
o
r
m
an
ce
s
o
f
th
e
m
ac
h
in
e.
E
ac
h
p
ar
am
eter
P
1
-
P
6
o
f
th
e
elec
tr
ic
m
o
to
r
d
esig
n
co
n
t
r
ib
u
tes
to
th
e
i
n
cr
ea
s
e
i
n
to
r
q
u
e
p
er
f
o
r
m
a
n
ce
an
d
les
s
e
n
a
f
lu
x
s
at
u
r
atio
n
.
T
h
e
f
ir
s
t
s
tep
is
ca
r
r
ied
o
u
t
b
y
ch
an
g
i
n
g
th
e
r
o
to
r
p
ar
am
eter
s
,
P
1
,
P
2
an
d
P3
w
h
ile
k
ee
p
in
g
P
4
-
P
6
as
co
n
s
tan
t.
T
h
eo
r
etica
lly
,
to
r
q
u
e
is
d
ir
ec
t
l
y
p
r
o
p
o
r
tio
n
al
to
th
e
r
o
to
r
p
ar
a
m
eter
,
P
1
-
P
3
w
it
h
t
h
e
m
o
t
o
r
d
iam
eter
r
e
m
ai
n
co
n
s
ta
n
t,
2
6
4
m
m
.
T
h
er
ef
o
r
e,
t
h
e
r
o
to
r
r
ad
iu
s
ca
n
b
e
p
r
es
u
m
ed
as
o
n
e
o
f
t
h
e
d
o
m
in
a
n
t
p
ar
a
m
eter
s
to
in
cr
ea
s
e
to
r
q
u
e
p
er
f
o
r
m
a
n
ce
s
a
n
d
less
e
n
f
l
u
x
s
at
u
r
atio
n
at
t
h
e
r
o
to
r
teeth
.
A
s
f
o
r
r
o
to
r
p
o
le
h
eig
h
t,
P
2
ar
e
im
p
r
o
v
i
n
g
to
allo
w
t
h
e
f
lu
x
to
f
lo
w
f
r
o
m
t
h
e
s
tato
r
to
r
o
to
r
w
it
h
lo
w
f
l
u
x
s
atu
r
atio
n
an
d
f
lu
x
lea
k
ag
e.
T
h
e
o
th
er
p
ar
a
m
eter
s
r
e
m
ain
ed
co
n
s
tan
t
w
h
e
n
ch
a
n
g
in
g
t
h
e
p
o
le
h
eig
h
t,
P
2
.
T
h
e
r
o
to
r
w
id
t
h
P
3
im
p
r
o
v
e
m
en
t
p
r
o
n
e
to
r
ec
eiv
e
all
f
l
u
x
f
r
o
m
s
tato
r
teet
h
b
y
th
e
in
cr
ea
s
e
i
n
s
p
ac
e
an
d
w
id
th
.
T
h
e
r
o
to
r
p
a
r
am
eter
o
f
P
1
,
P2
an
d
P
3
ar
e
th
en
u
p
d
ated
to
g
et
an
o
p
ti
m
u
m
to
r
q
u
e.
T
h
e
n
ex
t
g
r
o
u
p
o
f
p
ar
a
m
e
ter
s
w
ill
b
e
t
h
e
FEC
g
r
o
u
p
P
4
-
P5
,
an
d
o
th
er
p
ar
am
eter
s
ar
e
k
e
p
t
co
n
s
tan
t
w
h
e
n
ch
an
g
i
n
g
th
e
DC
-
FE
C
p
ar
am
eter
s
.
DC
-
FEC
s
lo
t
w
i
d
th
,
P
5
an
d
DC
-
FE
C
s
lo
t
d
ep
th
,
P
6
d
o
h
elp
to
co
n
tr
ib
u
te
to
w
ar
d
s
th
e
in
cr
e
m
en
t
o
f
m
ac
h
in
e
to
r
q
u
e
o
u
tp
u
t
.
T
h
is
is
b
ec
au
s
e
t
h
e
i
n
cr
ea
s
e
o
f
t
h
e
DC
-
FEC
s
lo
t
ar
ea
,
h
elp
to
im
p
r
o
v
e
m
o
r
e
f
l
u
x
lin
k
a
g
e
w
it
h
th
e
i
n
cr
ea
s
e
o
f
No
.
o
f
T
u
r
n
(
No
T
)
ag
ain
s
t
c
u
r
r
en
t
to
b
e
in
j
ec
ted
to
th
e
DC
-
FE
C
.
T
h
e
P
4
an
d
P
5
p
a
r
am
eter
ar
e
ad
j
u
s
ted
to
o
b
tain
th
e
o
p
ti
m
u
m
p
er
f
o
r
m
a
n
ce
an
d
p
r
o
d
u
ce
d
a
h
ig
h
er
to
r
q
u
e.
On
ce
th
e
m
a
x
i
m
u
m
to
r
q
u
e
f
o
r
r
o
to
r
an
d
FE
C
ar
e
d
eter
m
i
n
ed
,
th
e
f
i
n
al
s
t
ep
w
ill
b
e
d
o
n
e
b
y
i
m
p
r
o
v
e
t
h
e
ar
m
atu
r
e
co
il
,
AC
s
lo
t
o
r
ar
m
atu
r
e
co
il
,
AC
s
l
o
t
len
g
th
,
P
6
.
B
y
d
ec
r
ea
s
i
n
g
t
h
e
ar
m
a
tu
r
e
co
il
s
lo
t
len
g
th
a
n
d
m
ai
n
tai
n
th
e
s
lo
t
a
r
ea
w
ill
d
ir
ec
tl
y
r
e
s
u
lt
i
n
h
ig
h
er
w
id
th
o
f
ar
m
at
u
r
e
co
il
s
lo
t
.
T
h
u
s
,
it
ad
j
u
s
ted
w
it
h
t
h
e
s
ta
to
r
to
o
th
w
id
t
h
an
d
ca
u
s
e
m
a
g
n
et
ic
f
l
u
x
t
o
co
n
ce
n
tr
ate
an
d
f
lo
w
in
to
th
e
r
o
to
r
.
Hen
ce
,
d
eter
m
in
i
s
tic
o
p
ti
m
izatio
n
m
e
th
o
d
is
tr
ea
ted
co
n
s
ec
u
ti
v
el
y
b
y
v
ar
ied
P
1
-
P
6
u
n
til
t
h
e
tar
g
et
m
a
x
i
m
u
m
to
r
q
u
e
an
d
p
o
w
er
ar
e
ac
h
iev
ed
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
694
IJ
PEDS
Vo
l.
8
,
No
.
1
,
Ma
r
ch
201
7
:
2
3
9
–
247
242
S
t
a
r
t
C
h
a
n
g
e
r
o
t
o
r
P
a
r
a
m
e
t
e
r
s
P
1
P
2
P
3
C
h
a
n
g
e
F
i
e
l
d
E
x
c
i
t
a
t
i
o
n
C
o
i
l
P
a
r
a
m
e
t
e
r
P
4
P
5
C
h
a
n
g
e
A
r
m
a
t
u
r
e
C
o
i
l
P
a
r
a
m
e
t
e
r
P
6
T
>
=
2
1
0
Nm
P
>
1
2
3
kW
E
n
d
Y
e
s
No
Fig
u
r
e
5.
C
y
cle
o
f
d
esi
g
n
o
p
tim
izatio
n
2
.
2
.
Desig
n P
a
ra
m
et
er
a
nd
S
peci
f
ica
t
io
n
T
h
e
d
esig
n
r
estrictio
n
s
,
tar
g
et
s
p
ec
if
ica
tio
n
s
an
d
p
ar
a
m
eter
s
o
f
b
o
th
in
i
tial
a
n
d
o
p
ti
m
ized
d
esig
n
o
f
OR
FEF
SM
ar
e
lis
ted
i
n
T
ab
le
1
.
A
s
s
u
m
i
n
g
w
ater
j
ac
k
et
s
y
s
te
m
i
s
e
m
p
lo
y
ed
as
t
h
e
co
o
lin
g
s
y
s
te
m
f
o
r
th
e
m
ac
h
in
e,
t
h
e
li
m
it
o
f
th
e
c
u
r
r
en
t
d
en
s
it
y
is
s
et
to
h
av
e
m
a
x
i
m
u
m
at
3
0
A
r
m
s
/
m
m
2
f
o
r
ar
m
at
u
r
e
w
in
d
i
n
g
a
n
d
3
0
A
/
m
m
2
f
o
r
DC
-
FEC,
r
esp
ec
tiv
el
y
.
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t
ca
n
b
e
ex
p
ec
ted
th
at
th
e
r
o
to
r
s
tr
u
ct
u
r
e
is
m
ec
h
an
ica
ll
y
r
o
b
u
s
t
to
r
o
tate
at
h
ig
h
-
s
p
ee
d
b
ec
au
s
e
it
co
n
s
is
ts
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f
s
tack
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s
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f
t
ir
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n
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h
ee
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w
h
ich
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h
e
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g
et
m
ax
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m
u
m
o
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atin
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is
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u
p
to
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0
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0
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0
r
/
m
i
n
.
T
ab
le
1
.
Desig
n
P
ar
a
m
eter
s
a
n
d
Sp
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if
icatio
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ms
12S
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44
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I
J
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694
Desig
n
I
mp
r
o
ve
men
t o
f Th
r
ee
P
h
a
s
e
1
2
S
l
o
t
-
1
4
P
o
le
O
u
ter R
o
to
r
F
ield
E
xc
ita
tio
n
.
.
.
.
(
S
.
M.
N
.
S
.
Oth
ma
n
)
24
3
2
.
3
.
Under
No
-
L
o
a
d a
nd
O
n L
o
a
d Co
nd
it
io
n Ana
ly
s
i
s
T
h
er
eu
p
o
n
,
th
e
a
n
al
y
s
i
s
u
n
d
er
n
o
-
lo
ad
an
d
o
n
lo
ad
co
n
d
itio
n
i
s
f
u
l
f
i
ll
a
n
d
co
m
p
ar
ed
w
it
h
th
e
in
i
tial
d
esig
n
an
al
y
s
is
t
h
at
h
av
e
b
ee
n
ac
co
m
p
li
s
h
.
Fro
m
t
h
e
an
al
y
s
i
s
,
th
e
b
ac
k
-
e
m
f
a
n
d
co
g
g
i
n
g
to
r
q
u
e
ar
e
in
v
e
s
ti
g
ated
at
1
2
0
0
r
/m
i
n
.
On
lo
ad
co
n
d
itio
n
,
a
f
lu
x
d
is
tr
ib
u
tio
n
i
s
i
n
v
e
s
ti
g
ated
w
h
e
n
J
e
an
d
J
a
at
m
a
x
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m
u
m
3
0
A
/
m
m
2
an
d
3
0
A
r
m
s
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m
m
2
,
r
esp
ec
tiv
el
y
.
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h
e
f
in
al
d
esi
g
n
i
s
ex
p
ec
ted
to
r
ed
u
ce
th
e
f
lu
x
s
at
u
r
atio
n
i
n
o
r
d
er
t
o
g
en
er
ate
m
o
r
e
f
l
u
x
l
in
k
a
g
e
an
d
in
cr
ea
s
e
th
e
o
v
er
all
p
er
f
o
r
m
an
ce
o
f
t
h
e
d
esig
n
.
3.
RE
SU
L
T
S
A
ND
AN
AL
Y
SI
S
3
.
1
.
I
nd
uce
d Vo
lt
a
g
e
T
h
e
c
o
m
p
ar
is
o
n
o
f
i
n
d
u
ce
d
v
o
ltag
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o
f
i
n
itia
l
an
d
f
i
n
al
d
esig
n
1
2
Slo
t
-
1
4
P
o
le
OR
-
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E
F
SM
at
th
e
s
p
ee
d
o
f
1
2
0
0
r
p
m
i
s
ill
u
s
tr
ate
d
in
Fi
g
u
r
e
6
.
I
n
d
u
ce
d
v
o
lta
g
e
f
o
r
in
itial
d
e
s
ig
n
ar
e
1
3
7
.
2
V
,
w
h
ile
t
h
e
in
d
u
ce
d
v
o
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s
f
o
r
f
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al
d
esig
n
s
ar
e
1
7
7
.
1
5
V
r
esp
ec
tiv
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y
.
Fi
g
u
r
e
6
clea
r
ly
s
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o
w
n
t
h
at
th
e
a
m
p
l
it
u
d
e
o
f
in
d
u
ce
d
v
o
ltag
e
f
o
r
t
h
e
f
i
n
al
d
esi
g
n
m
o
to
r
s
h
as
b
ee
n
i
n
cr
ea
s
e.
T
h
e
m
ax
i
m
u
m
i
n
d
u
ce
d
v
o
ltag
e
in
cr
ea
s
e
b
y
2
9
.
1
2
%
f
r
o
m
it
s
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n
itial
v
al
u
e.
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n
d
u
ce
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v
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d
ep
en
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s
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n
th
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m
ax
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m
u
m
f
l
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s
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n
ce
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h
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m
a
x
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m
u
m
f
lu
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lin
k
ag
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e,
th
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n
d
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f
ec
ted
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m
p
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tl
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h
e
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ar
m
o
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ic
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is
s
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g
n
if
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y
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ce
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d
th
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ce
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v
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id
n
o
t
ex
ce
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th
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s
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p
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l
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e,
w
h
ich
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g
o
o
d
f
o
r
p
er
f
o
r
m
a
n
ce
o
f
th
e
m
o
to
r
b
ec
au
s
e
it
w
ill
n
o
t
in
ter
r
u
p
t
th
e
o
p
er
atio
n
o
f
th
e
m
o
to
r
s
as
it is
u
s
e
f
o
r
r
eg
e
n
er
ativ
e
b
r
ak
e
to
ch
ar
g
e
b
atter
y
.
Fig
u
r
e
6
.
I
n
d
u
ce
d
v
o
ltag
e
o
f
t
h
e
in
i
tial a
n
d
o
p
ti
m
ize
d
esig
n
3
.
2
.
Co
g
g
ing
T
o
rque
T
h
e
co
g
g
i
n
g
to
r
q
u
e
c
h
ar
ac
ter
is
tic
f
o
r
i
n
itial
a
n
d
i
m
p
r
o
v
ed
d
esig
n
i
s
s
h
o
w
n
i
n
Fi
g
u
r
e
7
.
Fro
m
t
h
e
f
i
g
u
r
e,
it
is
clea
r
l
y
s
h
o
w
n
t
h
at
th
e
p
ea
k
to
p
ea
k
co
g
g
i
n
g
to
r
q
u
e
o
f
th
e
i
m
p
r
o
v
ed
d
es
ig
n
i
s
in
cr
ea
s
e
b
y
1
5
.
5
9
N
m
i
n
cr
ea
s
e
w
it
h
7
ti
m
es
m
o
r
e
th
an
in
itial
d
es
ig
n
f
o
r
1
2
S
-
1
4
P
,
w
h
ich
is
2
.
1
N
m
.
Ge
n
er
al
th
eo
r
y
e
x
p
ec
ted
th
at
th
e
to
r
q
u
e
an
d
p
o
w
er
w
ill
b
e
im
p
r
o
v
ed
w
i
th
les
s
v
i
b
r
atio
n
an
d
n
o
is
e
as
co
m
p
ar
ed
to
in
itial
d
esig
n
alth
o
u
g
h
th
e
f
i
n
al
co
g
g
i
n
g
to
r
q
u
e
in
cr
ea
s
e
b
ec
a
u
s
e
i
n
h
ig
h
s
p
ee
d
r
eg
io
n
th
e
co
g
g
i
n
g
to
r
q
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e
w
i
ll b
e
n
e
g
li
g
ib
le.
B
esid
es,
th
e
co
g
g
i
n
g
to
r
q
u
e
in
cr
e
m
e
n
t
s
till
b
elo
w
1
0
%
o
f
t
h
e
i
n
s
ta
n
ta
n
eo
u
s
to
r
q
u
e.
E
x
p
lain
i
n
g
r
esear
ch
ch
r
o
n
o
lo
g
ical,
i
n
cl
u
d
in
g
r
ese
ar
ch
d
esi
g
n
,
r
esear
c
h
p
r
o
ce
d
u
r
e
(
in
th
e
f
o
r
m
o
f
a
lg
o
r
it
h
m
s
,
P
s
e
u
d
o
co
d
e
o
r
o
th
er
)
,
h
o
w
to
test
an
d
d
ata
ac
q
u
is
itio
n
[
1
]
-
[
3
]
.
T
h
e
d
escr
ip
ti
o
n
o
f
th
e
co
u
r
s
e
o
f
r
esear
ch
s
h
o
u
ld
b
e
s
u
p
p
o
r
ted
r
ef
er
en
ce
s
,
s
o
t
h
e
ex
p
la
n
atio
n
ca
n
b
e
ac
ce
p
ted
s
cien
ti
f
icall
y
[
2
]
,
[
4
]
.
Fig
u
r
e
7
.
I
n
s
tan
tan
eo
u
s
to
r
q
u
e
ch
ar
ac
ter
is
tics
o
f
in
itial a
n
d
o
p
ti
m
ized
d
esig
n
-
5
0
0
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3
0
0
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1
0
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1
0
0
3
0
0
5
0
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36
72
1
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1
4
4
1
8
0
2
1
6
2
5
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2
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3
2
4
3
6
0
B
-
EM
F
[
V
]
El
e
c
t
r
i
c
a
l
D
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e
[
°
]
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n
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t
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n
d
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To
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r
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I
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IJ
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Ma
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247
244
3
.
3
.
I
ns
t
a
nta
neo
us
T
o
rque
Cha
r
a
ct
er
is
t
ics E
qu
a
t
io
ns
T
h
e
in
s
ta
n
ta
n
eo
u
s
to
r
q
u
e
i
s
d
e
m
o
n
s
tr
ated
in
Fi
g
u
r
e
8
r
esp
ec
tiv
el
y
.
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t
i
s
s
h
o
w
n
t
h
at
th
e
m
ax
i
m
u
m
to
r
q
u
e
o
f
th
e
i
m
p
r
o
v
ed
d
esi
g
n
ab
le
to
ac
h
ie
v
e
ap
p
r
o
x
im
atel
y
5
9
%
m
o
r
e
to
r
q
u
e
th
an
th
e
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to
r
q
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p
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a
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ce
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1
2
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g
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2
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ig
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m
at
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r
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r
r
e
n
t
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en
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ill
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n
cr
ea
s
e
t
h
e
to
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q
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e
p
er
f
o
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(
Ger
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GSP
,
Vo
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4
1
)
an
d
C
en
tr
e
f
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r
Gr
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u
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Stu
d
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o
f
Un
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v
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s
it
y
T
u
n
H
u
s
s
e
in
O
n
n
Ma
la
y
s
ia
(
UT
HM
)
,
B
atu
P
a
h
at.
RE
F
E
R
E
NC
E
S
[1
]
J.
T
.
Ch
e
n
a
n
d
Z.
Q.
Z
h
u
,
“
W
in
d
i
n
g
c
o
n
f
ig
u
ra
ti
o
n
s
a
n
d
o
p
ti
m
a
l
sta
to
r
a
n
d
ro
t
o
r
p
o
le
c
o
m
b
in
a
ti
o
n
o
f
f
lu
x
-
s
w
it
c
h
in
g
P
M
b
r
u
sh
les
s A
C
m
a
c
h
in
e
s,”
IEE
E
T
ra
n
s.
E
n
e
rg
y
Co
n
v
e
rs
.
,
v
o
l
/i
ss
u
e
:
25
(
2
)
,
p
p
.
2
9
3
–
3
0
2
,
2
0
1
0
.
[2
]
M
.
Z.
A
h
m
a
d
,
e
t
a
l
.
,
“
O
p
ti
miza
ti
o
n
o
f
o
u
ter
-
ro
to
r h
y
b
rid
e
x
c
it
a
ti
o
n
F
S
M
fo
r
i
n
-
wh
e
e
l
d
ire
c
t
d
riv
e
e
lec
tric
v
e
h
icle
,
”
M
e
c
h
a
tro
n
ics
(ICM
)
,
2
0
1
5
IE
EE
In
tern
a
ti
o
n
a
l
C
o
n
f
e
re
n
c
e
o
n
,
Na
g
o
y
a
,
p
p
.
6
9
1
-
6
9
6
,
2
0
1
5
.
[3
]
F
.
Kh
a
n
,
e
t
a
l
.
,
“
C
o
il
tes
t
a
n
a
l
y
sis
o
f
W
o
u
n
d
-
fi
e
ld
t
h
re
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p
h
a
se
fl
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x
switch
in
g
ma
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h
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n
e
wit
h
n
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n
-
o
v
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rla
p
p
in
g
win
d
i
n
g
a
n
d
s
a
li
e
n
t
r
o
to
r
,
”
P
o
w
e
r
En
g
in
e
e
rin
g
a
n
d
Op
t
im
iz
a
ti
o
n
C
o
n
f
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re
n
c
e
(P
EOCO),
2
0
1
4
IEE
E
8
t
h
In
tern
a
ti
o
n
a
l,
L
a
n
g
k
a
w
i,
p
p
.
2
4
3
-
247
,
2
0
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4
.
[4
]
S
.
E.
Ra
u
c
h
a
n
d
L
.
J.
Jo
h
n
so
n
,
“
De
sig
n
P
r
in
c
ip
les
o
f
F
lu
x
-
S
w
it
c
h
A
lt
e
rn
a
to
rs
[
in
c
lu
d
e
s
d
i
sc
u
ss
io
n
]
,
”
i
n
T
ra
n
sa
c
ti
o
n
s
o
f
th
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Ame
ric
a
n
I
n
stit
u
te
o
f
E
lec
trica
l
E
n
g
i
n
e
e
rs
.
Pa
rt
III:
Po
we
r
Ap
p
a
ra
t
u
s
a
n
d
S
y
ste
ms
,
v
o
l
/i
ss
u
e
:
74
(
3
)
,
1
9
5
5
.
[5
]
W
.
F
e
i,
e
t
a
l
.
,
“
A
n
o
v
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l
o
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te
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ro
to
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p
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n
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n
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n
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lec
tric
v
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ic
le
p
ro
p
u
lsio
n
,
”
2
0
0
9
3
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d
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n
t.
C
o
n
f
.
P
o
w
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r
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e
c
tro
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.
S
y
st.
A
p
p
l.
,
2
0
0
9
.
[6
]
Y.
Ch
e
n
,
e
t
a
l
.
,
“
T
h
re
e
-
d
im
e
n
si
o
n
a
l
lu
m
p
e
d
-
p
a
ra
m
e
ter
m
a
g
n
e
ti
c
c
ircu
it
a
n
a
ly
sis
o
f
sin
g
le
-
p
h
a
se
f
lu
x
-
s
w
it
c
h
in
g
p
e
rm
a
n
e
n
t
-
m
a
g
n
e
t
m
o
to
r,
”
IEE
E
T
ra
n
s.
I
n
d
.
A
p
p
l.
,
v
o
l
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]
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laim
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n
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e
t
a
l.
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.
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Z.
Q.
Z
h
u
,
e
t
a
l
.
,
“
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n
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ly
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ter
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N.
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.
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.
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.
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m
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IEE
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201
7
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3
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247
246
[1
1
]
B.
M
.
S
o
n
g
,
e
t
a
l.
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“
De
sig
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a
n
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ter
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ro
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ter
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ro
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ms
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t.
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tro
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2
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iu
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sig
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In
t.
C
o
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.
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.
[1
3
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.
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.
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.
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4
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.
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h
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a
l.
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.
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.
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v
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p
.
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.
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5
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M
.
K.
Ha
ss
a
n
,
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t
a
l
.
,
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lo
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n
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lys
is,
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5
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[1
6
]
Z.
A
.
Hu
sin
,
e
t
a
l.
,
“
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fo
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win
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rid
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h
icle
s,
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se
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n
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v
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p
m
e
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t
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CORe
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2
0
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4
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t
u
d
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n
t
Co
n
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re
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e
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tu
F
e
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h
i,
2
0
1
4
.
[1
7
]
S
.
M
.
N.S
.
Oth
m
a
n
,
e
t
a
l.
,
“
In
it
ial
De
sig
n
o
f
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2
s
-
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a
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a
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in
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,
”
2
nd
Po
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n
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En
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7
7
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0
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4
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n
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6
.
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Ju
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