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Appl
ied P
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wer
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I
J
AP
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)
Vo
l.
1
5
,
No
.
3
,
Sep
tem
b
er
20
2
6
,
p
p
.
1
1
9
0
~
1
199
I
SS
N:
2252
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8
7
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2
,
DOI
:
1
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.
1
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.
v
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.
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-
1
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1190
J
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m
ep
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:
h
ttp
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//
ija
p
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ia
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Perf
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ly
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o
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R
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Sep
2
8
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2
0
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R
ev
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Ma
r
1
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2
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6
Acc
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6
Th
e
p
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rfo
rm
a
n
c
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o
f
th
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S
R
M
is
in
flu
e
n
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sig
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ters
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in
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lu
d
in
g
th
e
len
g
th
s
o
f
t
h
e
ro
to
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sta
c
k
a
n
d
sta
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c
k
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p
ica
ll
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th
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S
RM
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d
e
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h
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a
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li
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sta
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n
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An
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k
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o
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:
t
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f
ig
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n
s
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e
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sta
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o
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s
s
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th
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n
t
h
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a
n
d
th
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se
c
o
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d
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o
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c
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th
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se
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th
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si
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ld
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rtain
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ica
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o
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ti
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n
t
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m
a
n
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p
u
late
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e
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ima
l
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sig
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e
sp
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c
ially
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r
l
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st,
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rti
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a
n
d
h
ig
h
-
sp
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d
a
p
p
li
c
a
ti
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s.
K
ey
w
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s
:
An
s
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Mo
to
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C
AD
Sen
s
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Switch
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o
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eq
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s
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a
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u
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d
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CC B
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SA
li
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C
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p
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A
uth
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Mo
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Un
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m
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.
a
li@
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tech
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o
lo
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.
e
d
u
.
iq
1.
I
NT
RO
D
UCT
I
O
N
W
ith
th
e
d
ev
elo
p
m
en
t
o
f
co
m
p
u
ter
s
an
d
p
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elec
tr
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s
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esear
ch
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h
av
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b
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d
ir
ec
t
ed
to
war
d
s
r
elu
ctan
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m
o
to
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s
,
esp
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ially
s
witch
ed
r
elu
ctan
ce
m
o
t
o
r
s
(
SR
M)
.
SR
M
s
h
av
e
th
e
ad
v
an
ta
g
es
o
f
r
eliab
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d
th
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ab
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y
to
o
p
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ate
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f
o
u
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q
u
ad
r
an
ts
o
v
er
a
wid
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-
s
p
ee
d
r
an
g
e.
Als
o
,
lo
w
co
s
t,
r
u
g
g
ed
co
n
s
tr
u
ctio
n
,
an
d
s
im
p
le
s
tr
u
ctu
r
e
ar
e
k
ey
ad
v
a
n
tag
es
o
f
th
is
m
o
t
o
r
.
T
h
ese
f
ea
tu
r
es
h
av
e
m
ad
e
SR
Ms
co
m
m
o
n
in
co
m
m
e
r
cial
an
d
in
d
u
s
tr
ial
ap
p
licatio
n
s
[
1
]
.
T
h
e
p
er
f
o
r
m
a
n
ce
o
f
th
e
SR
M
is
i
n
f
lu
en
ce
d
b
y
s
ev
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al
d
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ar
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in
clu
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in
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th
e
len
g
t
h
s
o
f
r
o
t
o
r
s
tack
an
d
s
tato
r
s
tack
[
2
]
-
[
6
]
.
T
h
e
len
g
th
s
o
f
th
e
m
o
to
r
(
s
tato
r
an
d
r
o
to
r
)
ar
e
d
ec
id
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b
y
th
e
n
atu
r
e
o
f
t
h
e
ap
p
licatio
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a
n
d
s
p
ac
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co
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s
tr
ain
ts
.
Fo
r
s
er
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o
a
p
p
licatio
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s
,
th
e
m
o
to
r
le
n
g
th
i
s
u
s
u
ally
1
-
3
tim
es
th
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m
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d
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,
w
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is
0
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2
5
-
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7
tim
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th
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d
iam
eter
f
o
r
n
o
n
-
s
er
v
o
ap
p
licatio
n
s
[
1
]
.
A
lo
n
g
er
s
tato
r
a
n
d
r
o
to
r
in
cr
e
ase
th
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s
u
r
f
ac
e
ar
ea
a
v
ailab
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f
o
r
m
ag
n
etic
f
ield
in
ter
ac
tio
n
.
T
h
is
in
cr
ea
s
ed
ar
ea
allo
ws
g
r
ea
ter
to
r
q
u
e
to
b
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d
e
v
elo
p
ed
,
wh
ich
co
n
tr
ib
u
tes
to
h
ig
h
er
p
o
wer
o
u
tp
u
t.
On
th
e
o
th
er
h
a
n
d
,
lo
n
g
er
m
o
to
r
s
p
r
o
v
id
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ad
d
itio
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al
s
p
a
ce
f
o
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win
d
in
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a
n
d
ca
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lead
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ed
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o
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an
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s
s
es)
wh
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ca
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f
f
s
et
s
o
m
e
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f
th
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g
ain
s
in
p
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tp
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I
f
th
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m
o
to
r
is
d
esig
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to
b
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lo
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g
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ca
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wh
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ca
n
lim
it
th
e
ef
f
ec
tiv
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ess
o
f
th
e
in
cr
ea
s
ed
len
g
th
in
p
r
o
d
u
cin
g
ad
d
itio
n
al
p
o
wer
[
3
]
,
[
7
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J Ap
p
l Po
wer
E
n
g
I
SS
N:
2252
-
8
7
9
2
P
erfo
r
ma
n
ce
a
n
a
lysi
s
o
f u
n
-
e
q
u
a
l ro
to
r
a
n
d
s
ta
to
r
len
g
th
s
w
itch
ed
…
(
Mo
h
a
mme
d
Mo
a
n
es E
z
z
a
ld
ea
n
A
li
)
1191
No
r
m
ally
,
th
e
SR
M
is
d
esig
n
ed
with
eq
u
al
r
o
to
r
a
n
d
s
tato
r
l
en
g
th
s
.
Ho
wev
er
,
th
er
e
ar
e
s
o
m
e
lim
ited
ex
ce
p
tio
n
s
wh
er
e
th
e
m
o
to
r
h
a
s
a
r
o
to
r
th
at
is
lo
n
g
er
o
r
s
h
o
r
t
er
th
an
th
e
s
tato
r
,
an
ex
am
p
le
is
th
e
Om
n
i+
Ser
ie
s
SR
Ms,
wh
er
e
th
e
r
o
to
r
is
s
h
o
r
ter
th
an
th
e
s
tato
r
.
T
h
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m
o
to
r
s
ar
e
f
r
am
eless
,
h
ig
h
to
r
q
u
e
d
e
n
s
ity
,
lo
w
co
g
g
in
g
d
ir
ec
t
d
r
iv
e
m
o
to
r
s
m
a
n
u
f
ac
t
u
r
ed
b
y
C
eler
a
Mo
tio
n
[
8
]
.
I
n
ad
d
itio
n
,
c
u
s
to
m
s
witch
ed
r
e
lu
ctan
ce
m
o
to
r
s
f
o
r
ap
p
licatio
n
s
lik
e
co
m
p
r
ess
o
r
s
m
ay
r
eq
u
ir
e
in
eq
u
ality
to
m
ee
t
s
p
ec
if
ic
p
er
f
o
r
m
an
ce
c
r
ite
r
ia.
T
h
is
p
ap
er
ex
am
in
es
th
e
c
h
an
g
es
i
n
SR
M
p
er
f
o
r
m
an
ce
w
h
en
th
e
s
tato
r
is
s
h
o
r
ter
t
h
an
t
h
e
r
o
to
r
o
r
wh
en
th
e
r
o
to
r
is
s
h
o
r
te
r
th
an
th
e
s
tato
r
.
I
n
r
ev
iewin
g
p
r
ev
i
o
u
s
p
u
b
lica
tio
n
s
,
th
e
au
th
o
r
s
b
eliev
e
t
h
at
th
is
s
tu
d
y
is
th
e
f
ir
s
t
o
n
th
is
to
p
ic.
T
h
is
m
ay
b
e
d
u
e
to
th
e
r
ar
ity
o
f
SR
Ms
in
wh
ich
th
e
r
o
to
r
is
n
o
t
o
f
th
e
s
am
e
len
g
th
as
th
e
s
tato
r
.
I
n
ad
d
itio
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to
th
at,
th
er
e
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o
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er
im
p
o
r
tan
t
r
ea
s
o
n
wh
i
ch
is
s
u
ch
a
s
tu
d
y
r
eq
u
i
r
es
a
th
r
ee
-
d
im
en
s
io
n
FEM
an
aly
s
is
o
f
th
e
m
o
to
r
,
wh
ich
is
co
m
p
licated
an
d
tim
e
co
n
s
u
m
in
g
[
5
]
,
[
9
]
-
[
1
3
]
.
T
h
is
p
ap
er
is
o
r
g
an
ized
o
n
th
e
f
o
llo
win
g
lin
es:
Sectio
n
2
r
ep
r
esen
ts
th
e
s
tr
u
ctu
r
e
o
f
t
h
e
SR
M.
Per
f
o
r
m
an
ce
in
d
icat
o
r
s
o
f
th
e
SR
M
ar
e
p
r
esen
ted
in
s
ec
tio
n
3
.
T
h
e
m
eth
o
d
o
l
o
g
y
o
f
th
is
s
tu
d
y
an
d
h
o
w
th
e
r
esu
lts
wer
e
o
b
tain
ed
is
d
is
cu
s
s
ed
in
s
ec
tio
n
4
.
Sectio
n
5
r
e
p
r
esen
ts
th
e
r
esu
lts
an
d
d
is
cu
s
s
io
n
s
o
f
:
1
-
s
t
ato
r
s
h
o
r
ter
th
an
r
o
t
o
r
ca
s
e,
an
d
2
-
r
o
to
r
s
h
o
r
ter
th
an
s
tato
r
ca
s
e.
Fin
ally
,
s
ec
tio
n
6
p
r
esen
ts
th
e
co
n
clu
s
io
n
s
o
f
t
h
is
p
ap
er
.
2.
ST
RUC
T
UR
E
O
F
SW
I
T
CH
E
D
RE
L
UC
T
ANC
E
M
O
T
O
R
T
h
e
s
witch
ed
r
elu
ctan
ce
m
o
to
r
is
a
m
ac
h
in
e
with
d
o
u
b
le
s
a
lien
ce
s
tato
r
an
d
r
o
to
r
p
o
les
;
i
t
o
p
er
ates
with
o
u
t
an
y
m
ec
h
a
n
ical
co
m
m
u
tatio
n
co
m
p
o
n
en
ts
.
T
h
is
s
tr
u
c
tu
r
e
co
n
tr
ib
u
tes
to
th
e
p
r
o
d
u
cti
o
n
o
f
a
h
i
g
h
o
u
t
p
u
t
to
r
q
u
e
[
1
4
]
-
[
1
6
]
.
T
h
e
m
o
s
t
co
m
m
o
n
c
o
m
b
in
atio
n
s
o
f
s
tato
r
an
d
r
o
to
r
p
o
les
ar
e
6
/4
an
d
8
/6
.
A
ty
p
ical
6
/4
SR
M
is
s
h
o
wn
in
Fig
u
r
e
1
.
T
h
e
s
tato
r
h
as
ex
citatio
n
win
d
in
g
s
ar
o
u
n
d
its
p
o
les;
th
e
win
d
in
g
s
ar
e
co
n
n
ec
ted
in
o
p
p
o
s
ite
p
air
s
in
o
r
d
er
to
f
o
r
m
p
h
ases
.
T
h
e
win
d
in
g
s
f
o
r
ea
c
h
p
h
ase
ar
e
in
d
e
p
en
d
e
n
tly
c
o
n
n
e
cted
to
a
s
witch
in
g
cir
cu
it
f
o
r
its
co
m
m
u
tatio
n
[
7
]
,
[
1
7
]
.
T
h
e
r
o
to
r
m
ay
b
e
ex
te
r
n
al
b
u
t
is
u
s
u
ally
s
itu
ated
i
n
s
id
e
th
e
s
tato
r
.
T
h
e
s
tato
r
an
d
r
o
to
r
ar
e
ass
em
b
led
f
r
o
m
s
teel
lam
in
atio
n
s
o
f
th
e
s
am
e
g
r
ad
e
a
n
d
t
h
ick
n
ess
.
I
n
SR
M,
th
e
s
tato
r
an
d
r
o
to
r
p
o
les
ar
e
s
y
m
m
etr
ical
a
b
o
u
t
th
e
ce
n
ter
lin
es,
th
e
y
ar
e
also
e
q
u
ally
s
p
ac
ed
ar
o
u
n
d
t
h
e
s
tato
r
an
d
r
o
to
r
[
1
3
]
,
[
1
8
]
,
[
1
9
]
.
T
h
e
n
u
m
b
e
r
o
f
s
tato
r
an
d
r
o
to
r
p
o
les,
as
well
as
th
e
p
o
le
-
ar
c
an
g
les
o
f
th
e
s
tato
r
an
d
r
o
to
r
p
o
les,
ar
e
s
elec
ted
to
m
ee
t
th
e
d
esire
d
m
ac
h
in
e
p
er
f
o
r
m
an
ce
.
Oth
er
d
im
en
s
io
n
s
in
a
n
SR
M
h
av
e
a
s
ig
n
if
ican
t
im
p
ac
t
o
n
its
p
er
f
o
r
m
a
n
ce
;
th
e
s
e
d
im
en
s
io
n
s
ar
e
s
tato
r
o
u
ter
d
iam
eter
,
s
tato
r
y
o
k
e
th
ic
k
n
ess
,
s
tato
r
p
o
le
len
g
th
,
air
g
ap
len
g
th
,
r
o
to
r
d
iam
eter
,
r
o
to
r
p
o
le
len
g
th
,
a
n
d
r
o
to
r
y
o
k
e
th
ick
n
ess
[
2
0
]
.
Fu
r
th
er
m
o
r
e,
th
e
p
e
r
f
o
r
m
an
ce
o
f
th
e
m
o
to
r
is
af
f
ec
ted
b
y
th
e
ch
an
g
e
in
th
e
len
g
th
o
f
th
e
s
tato
r
an
d
th
e
r
o
to
r
;
th
is
is
s
u
e
w
ill
b
e
in
v
esti
g
ated
in
th
is
wo
r
k
.
(
a)
(
b
)
(
c)
(
d
)
Fig
u
r
e
1
.
Switch
ed
r
el
u
ctan
ce
m
o
to
r
: (
a
)
c
r
o
s
s
s
ec
tio
n
v
iew
,
(
b
)
s
tato
r
co
r
e
,
(
c
)
w
in
d
in
g
,
an
d
(
d
)
r
o
to
r
3.
P
E
RF
O
RM
A
NCE
I
NDI
CA
T
O
RS O
F
SWI
T
CH
E
D
RE
L
UC
T
ANC
E
M
O
T
O
R
T
h
e
k
ey
p
e
r
f
o
r
m
an
ce
in
d
icat
o
r
s
o
f
th
e
s
witch
ed
r
elu
ctan
c
e
m
o
to
r
in
clu
d
e
t
h
e
to
r
q
u
e
d
en
s
ity
,
th
e
to
r
q
u
e
r
ip
p
le,
lo
s
s
es
,
an
d
ef
f
icien
cy
.
T
o
r
q
u
e
in
an
SR
M
is
d
e
v
elo
p
ed
b
y
th
e
alig
n
m
en
t
ten
d
en
cy
o
f
th
e
r
o
t
o
r
to
ad
o
p
t
a
p
o
s
itio
n
o
f
m
a
x
im
u
m
p
h
ase
in
d
u
ctan
ce
o
r
m
i
n
im
u
m
r
elu
ctan
ce
,
an
d
b
y
d
o
in
g
s
o
co
n
v
er
tin
g
s
o
m
e
o
f
th
e
f
ield
en
er
g
y
to
m
o
tio
n
en
er
g
y
[
9
]
,
[2
1
]
.
B
ased
o
n
th
e
to
tal
wo
r
k
p
er
f
o
r
m
ed
o
v
e
r
o
n
e
co
m
p
lete
m
ac
h
in
e
r
ev
o
lu
tio
n
,
th
e
av
e
r
ag
e
to
r
q
u
e
is
ex
p
r
ess
ed
as
(
1
)
[
7
]
.
=
2
(
1
)
δ
Wm
is
th
e
wo
r
k
d
o
n
e
b
y
th
e
m
ac
h
in
e
c
y
cle,
N
s
an
d
N
r
ar
e
t
h
e
s
tato
r
a
n
d
r
o
to
r
n
u
m
b
er
o
f
p
o
les,
r
esp
ec
tiv
ely
.
I
n
th
is
is
s
u
e,
t
h
e
m
o
to
r
len
g
th
is
a
f
u
n
d
a
m
en
tal
p
ar
am
eter
a
n
d
it
d
ir
ec
tly
im
p
ac
ts
th
e
av
er
ag
e
to
r
q
u
e
b
ec
au
s
e
m
o
r
e
len
g
th
allo
ws
m
o
r
e
en
e
r
g
y
to
b
e
co
n
v
er
ted
in
to
th
e
m
a
ch
in
e.
T
h
e
in
s
tan
tan
eo
u
s
to
r
q
u
e
d
ev
elo
p
ed
is
tim
e
-
v
ar
y
in
g
:
it
is
d
ir
ec
tly
r
elate
d
to
th
e
r
ate
o
f
ch
a
n
g
e
o
f
in
d
u
ctan
ce
.
T
o
r
q
u
e
r
ip
p
le
(
T
ripple
)
is
d
ef
in
ed
as
th
e
d
if
f
er
en
ce
b
etwe
en
th
e
in
s
tan
tan
eo
u
s
m
ax
im
u
m
to
r
q
u
e
(
T
Max
)
an
d
m
in
im
u
m
to
r
q
u
e
(
T
Min
)
[
1
]
.
T
h
e
to
r
q
u
e
r
ip
p
le
is
ca
lcu
lated
as
(
2
)
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
9
2
I
n
t J Ap
p
l Po
wer
E
n
g
,
Vo
l.
1
5
,
No
.
3
,
Sep
tem
b
er
20
2
6
:
1
1
9
0
-
1
1
9
9
1192
=
−
(
2
)
T
h
e
p
er
ce
n
tag
e
o
f
to
r
q
u
e
r
ip
p
le
is
ex
p
r
ess
ed
b
y
(
3
)
[
1
]
.
(
%
)
=
×
100
(
3
)
T
h
e
o
u
tp
u
t
p
o
wer
(
P
out
)
is
th
e
p
r
o
d
u
ct
o
f
th
e
an
g
u
lar
v
elo
cit
y
(
ω
)
an
d
t
h
e
av
e
r
ag
e
to
r
q
u
e
[
1
]
,
[
2
]
.
T
h
e
o
u
tp
u
t
p
o
wer
is
ex
p
r
ess
ed
as (
4
)
.
=
×
(
4
)
T
h
e
u
n
s
atu
r
ate
d
v
al
u
es
o
f
th
e
alig
n
ed
i
n
d
u
cta
n
ce
(
L
a
)
an
d
t
h
e
u
n
alig
n
ed
i
n
d
u
cta
n
ce
(
L
u
)
ar
e
f
u
n
d
am
en
tal
in
SR
M,
th
ey
p
lay
an
im
p
o
r
tan
t
r
o
le
in
b
o
t
h
to
r
q
u
e
an
d
to
r
q
u
e
r
ip
p
le
[
2
1
]
-
[2
3
]
.
T
h
e
p
h
ase
in
d
u
ctan
ce
o
f
SR
M
d
ep
en
d
s
o
n
b
o
th
th
e
cu
r
r
e
n
t
an
d
th
e
r
o
to
r
p
o
s
itio
n
.
I
n
th
is
co
n
tex
t,
th
e
m
o
to
r
d
im
en
s
io
n
s
also
h
av
e
a
s
ig
n
if
ican
t
r
o
le
;
th
e
len
g
th
o
f
t
h
e
s
tato
r
an
d
r
o
to
r
ar
e
am
o
n
g
t
h
e
d
im
en
s
i
o
n
s
th
at
af
f
ec
t th
e
v
alu
e
o
f
L
a
an
d
L
u
[
7
]
,
[2
4
].
As
f
o
r
an
y
elec
tr
ic
m
ac
h
in
e,
v
ar
io
u
s
lo
s
s
es
o
cc
u
r
in
th
e
s
witch
ed
r
elu
ctan
ce
m
o
to
r
,
th
e
s
e
lo
s
s
e
s
ar
e
co
p
p
er
,
ir
o
n
co
r
e,
an
d
m
ec
h
an
ical
lo
s
s
e
s
.
C
o
p
p
er
lo
s
s
es (
P
cu
)
d
ep
en
d
o
n
th
e
R
MS
p
h
ase
cu
r
r
en
t a
n
d
th
e
p
h
ase
r
esis
tan
ce
(
R
ph
)
,
tak
in
g
in
to
ac
co
u
n
t th
e
n
u
m
b
er
o
f
p
h
ases
(
m
)
.
T
h
e
c
o
p
p
e
r
lo
s
s
is
ca
lcu
lated
u
s
in
g
(
5
)
.
=
ℎ
2
ℎ
(
5
)
T
h
e
ev
alu
atio
n
o
f
ir
o
n
lo
s
s
es (
P
iron
)
is
p
er
f
o
r
m
ed
th
r
o
u
g
h
th
e
B
er
to
tti
-
b
ased
m
o
d
if
ied
Stein
m
etz
m
o
d
el,
w
h
ich
d
ec
o
m
p
o
s
es
th
e
to
tal
lo
s
s
in
to
h
y
s
ter
esis
(
P
h
)
,
class
ical
ed
d
y
cu
r
r
en
t
(
P
e
)
,
an
d
ex
ce
s
s
lo
s
s
(
P
a
)
co
m
p
o
n
en
ts
[
2
5
]
.
T
h
e
ir
o
n
lo
s
s
is
ex
p
r
ess
ed
as (
6
)
.
=
ℎ
+
+
=
ℎ
+
2
2
+
1
.
5
1
.
5
(
6
)
W
h
er
e
f
is
th
e
f
r
eq
u
en
cy
,
B
is
th
e
f
lu
x
d
en
s
ity
,
n
is
Stein
m
etz
co
ef
f
icien
t
an
d
k
h
,
k
e
,
k
a
ar
e
m
ater
ial
-
s
p
ec
if
ic
co
ef
f
icien
ts
.
T
h
e
ef
f
icien
cy
(
η
)
is
th
e
r
atio
o
f
th
e
o
u
tp
u
t
p
o
wer
to
th
e
t
o
tal
elec
tr
ical
in
p
u
t
p
o
wer
(
P
in
)
.
T
h
e
m
o
to
r
ef
f
icien
cy
is
ca
lcu
lated
as
(
7
)
.
=
=
+
+
+
ℎ
×
100%
(
7
)
Mo
to
r
len
g
th
ca
u
s
es
a
m
ajo
r
im
p
ac
t
o
n
th
e
lo
s
s
es
an
d
th
e
m
o
to
r
ef
f
icien
cy
wh
e
r
e
th
e
s
tato
r
len
g
th
h
as
th
e
g
r
ea
test
in
f
lu
en
ce
o
n
co
p
p
er
l
o
s
s
es,
s
in
ce
th
e
lo
n
g
er
th
e
s
tato
r
co
r
e,
th
e
lo
n
g
er
th
e
m
ea
n
le
n
g
th
o
f
th
e
win
d
in
g
[
7
]
.
M
o
r
eo
v
er
,
ir
o
n
l
o
s
s
es
ar
e
r
elate
d
to
th
e
len
g
t
h
o
f
b
o
th
th
e
r
o
to
r
an
d
th
e
s
tato
r
,
as
th
ese
lo
s
s
es
ar
e
d
ir
ec
tly
p
r
o
p
o
r
tio
n
al
to
th
e
v
o
lu
m
e
o
f
ir
o
n
in
t
h
e
m
o
to
r
co
r
es
[
1
]
.
I
n
ter
m
s
o
f
m
ec
h
a
n
ical
lo
s
s
es
(
P
mech
)
,
a
lo
n
g
e
r
r
o
t
o
r
ex
p
er
ien
ce
s
h
ig
h
er
win
d
a
g
e
lo
s
s
es
an
d
m
ec
h
an
ical
v
ib
r
a
tio
n
s
wh
ich
lea
d
s
to
in
cr
ea
s
ed
f
r
ictio
n
lo
s
s
es,
esp
ec
ially
at
h
ig
h
s
p
ee
d
s
[
3
]
,
[
6
]
(
m
ec
h
an
ical
lo
s
s
es a
r
e
n
o
t
co
n
s
id
er
ed
in
th
is
s
tu
d
y
)
.
4.
M
E
T
H
O
DO
L
O
G
Y
T
h
is
s
tu
d
y
in
v
esti
g
ates
th
e
im
p
ac
t
o
f
u
n
e
q
u
al
s
tato
r
an
d
r
o
to
r
s
tack
len
g
th
s
o
n
th
e
p
er
f
o
r
m
an
ce
o
f
th
e
s
witch
ed
r
elu
ctan
ce
m
o
t
o
r
.
T
h
e
m
ain
s
tep
s
o
f
th
e
ad
o
p
ted
ap
p
r
o
ac
h
ca
n
b
e
s
u
m
m
a
r
ized
as
f
o
llo
ws:
I
n
itially
,
a
b
aselin
e
6
/4
s
witch
ed
r
elu
ct
an
ce
m
o
to
r
with
e
q
u
iv
alen
t
s
t
ato
r
an
d
r
o
to
r
s
tack
len
g
th
s
was
d
esig
n
ed
u
tili
zin
g
An
s
y
s
Mo
to
r
-
C
AD.
All
g
eo
m
etr
ic
d
im
en
s
io
n
s
,
win
d
in
g
p
ar
am
eter
s
,
m
ater
ial
p
r
o
p
er
ties
,
an
d
o
p
er
atin
g
co
n
d
itio
n
s
wer
e
d
e
f
in
ed
a
n
d
k
ep
t
co
n
s
tan
t
th
r
o
u
g
h
o
u
t
th
e
s
tu
d
y
.
T
h
e
p
ar
am
eter
s
o
f
t
h
e
SR
M
ar
e
lis
ted
in
T
ab
le
1
.
A
th
r
ee
-
d
im
en
s
io
n
al
f
in
ite
elem
en
t
elec
tr
o
m
ag
n
etic
m
o
d
el
o
f
th
e
SR
M
wa
s
d
ev
elo
p
ed
to
en
s
u
r
e
a
r
ea
lis
tic
ev
alu
atio
n
o
f
t
h
e
m
o
t
o
r
p
er
f
o
r
m
an
ce
u
n
d
er
u
n
e
q
u
al
s
tack
len
g
th
co
n
d
itio
n
s
.
A
s
en
s
itiv
ity
an
aly
s
is
was
p
er
f
o
r
m
ed
b
y
s
y
s
tem
atica
lly
v
ar
y
in
g
th
e
s
tack
len
g
th
s
w
h
ile
m
ain
tain
in
g
all
o
th
er
p
a
r
am
ete
r
s
u
n
ch
a
n
g
ed
.
T
h
is
an
aly
s
is
d
o
es
n
o
t
aim
to
p
r
o
v
i
d
e
r
ef
i
n
em
en
t
f
o
r
a
p
ar
ticu
lar
ap
p
licatio
n
;
r
at
h
er
,
it
is
in
ten
d
ed
to
d
em
o
n
s
tr
ate
th
e
f
ea
s
ib
ilit
y
o
f
th
e
p
r
o
p
o
s
ed
d
ev
elo
p
m
en
t
[
1
0
]
.
T
w
o
d
is
ti
n
ct
ca
s
es
wer
e
in
v
esti
g
ated
:
i)
s
tato
r
s
tack
len
g
th
s
h
o
r
ter
th
a
n
r
o
to
r
s
tack
len
g
th
,
an
d
ii)
r
o
t
o
r
s
tack
len
g
th
s
h
o
r
ter
th
an
s
tato
r
s
tack
le
n
g
th
.
Fo
r
ea
ch
ca
s
e,
th
e
s
tack
len
g
th
was
v
ar
ied
f
r
o
m
6
0
to
9
0
m
m
in
p
r
ed
e
f
in
ed
s
tep
s
.
Fig
u
r
e
2
s
h
o
ws
a
n
ax
ial
v
i
ew
o
f
u
n
ev
e
n
r
o
to
r
an
d
s
tato
r
len
g
t
h
SR
M.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J Ap
p
l Po
wer
E
n
g
I
SS
N:
2252
-
8
7
9
2
P
erfo
r
ma
n
ce
a
n
a
lysi
s
o
f u
n
-
e
q
u
a
l ro
to
r
a
n
d
s
ta
to
r
len
g
th
s
w
itch
ed
…
(
Mo
h
a
mme
d
Mo
a
n
es E
z
z
a
ld
ea
n
A
li
)
1193
T
ab
le
1
.
Par
am
eter
o
f
th
e
SR
M
P
a
r
a
me
t
e
r
V
a
l
u
e
U
n
i
t
P
a
r
a
me
t
e
r
V
a
l
u
e
U
n
i
t
S
t
a
t
o
r
p
o
l
e
s
6
R
o
t
o
r
p
o
l
e
a
n
g
l
e
30
d
e
g
r
e
e
S
t
a
t
o
r
p
o
l
e
a
n
g
l
e
30
d
e
g
r
e
e
R
o
t
o
r
s
l
o
t
d
e
p
t
h
10
mm
S
t
a
t
o
r
l
a
m
i
n
a
t
i
o
n
d
i
a
me
t
e
r
1
3
0
mm
P
o
l
e
t
a
p
e
r
a
n
g
l
e
0
d
e
g
r
e
e
S
t
a
t
o
r
b
o
r
e
80
mm
S
h
a
f
t
d
i
a
m
e
t
e
r
25
mm
S
t
a
t
o
r
p
o
l
e
d
e
p
t
h
15
mm
A
i
r
-
g
a
p
l
e
n
g
t
h
1
mm
S
t
a
t
o
r
p
o
l
e
t
a
p
e
r
a
n
g
l
e
0
d
e
g
r
e
e
R
o
t
o
r
p
o
l
e
s
4
S
t
a
t
o
r
p
o
l
e
r
a
d
i
u
s
2
mm
(
a)
(
b
)
Fig
u
r
e
2
.
Un
e
v
en
r
o
to
r
a
n
d
s
ta
to
r
len
g
th
SR
M
: (
a
)
s
tato
r
s
h
o
r
ter
th
an
r
o
to
r
a
n
d
(
b
)
r
o
to
r
s
h
o
r
ter
th
an
s
tato
r
E
lectr
o
m
ag
n
etic
s
im
u
latio
n
s
wer
e
ca
r
r
ied
o
u
t
f
o
r
ea
ch
co
n
f
ig
u
r
atio
n
to
ex
t
r
ac
t
k
e
y
p
e
r
f
o
r
m
a
n
ce
in
d
icato
r
s
,
in
clu
d
in
g
alig
n
ed
an
d
u
n
alig
n
ed
in
d
u
ctan
ce
s
,
t
o
r
q
u
e
ch
ar
ac
ter
is
tics
,
to
r
q
u
e
r
ip
p
le,
air
-
g
ap
f
lu
x
d
en
s
ity
,
co
p
p
er
lo
s
s
es,
ir
o
n
lo
s
s
es,
ef
f
icien
cy
,
p
o
w
er
f
ac
to
r
,
a
n
d
r
o
to
r
in
e
r
tia.
Fin
ally
,
th
e
o
b
tain
ed
r
esu
lts
wer
e
an
aly
ze
d
an
d
co
m
p
ar
ed
with
t
h
e
b
aselin
e
d
esig
n
in
o
r
d
e
r
to
q
u
an
tify
th
e
in
f
lu
e
n
ce
o
f
u
n
eq
u
al
s
tato
r
a
n
d
r
o
to
r
len
g
th
s
o
n
th
e
o
v
er
all
m
o
to
r
p
er
f
o
r
m
an
ce
.
T
h
e
o
b
s
er
v
ed
v
ar
iatio
n
s
wer
e
th
en
ca
teg
o
r
ized
an
d
d
is
cu
s
s
ed
to
id
en
ti
f
y
ac
ce
p
ta
b
le
d
esig
n
r
a
n
g
es
an
d
p
o
ten
tial
b
en
ef
its
o
f
ad
o
p
tin
g
u
n
e
q
u
al
s
tack
len
g
th
s
in
p
r
ac
tical
SR
M
ap
p
licatio
n
s
.
5.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
5
.
1
.
St
a
t
o
r
s
ho
rt
er
t
ha
n r
o
t
o
r
ca
s
e
Fig
u
r
e
3
s
h
o
ws
th
e
ch
an
g
e
i
n
alig
n
ed
an
d
u
n
alig
n
e
d
in
d
u
ct
an
ce
wh
en
th
e
s
tato
r
len
g
th
i
s
r
ed
u
ce
d
.
R
ed
u
cin
g
th
e
s
tato
r
len
g
th
f
r
o
m
9
0
to
6
0
m
m
r
esu
lts
in
a
3
2
.
7
2
%
r
ed
u
ctio
n
in
alig
n
ed
in
d
u
ctan
ce
an
d
a
3
0
.
3
3
%
r
ed
u
ctio
n
in
u
n
alig
n
e
d
in
d
u
ct
an
ce
.
T
h
e
in
d
u
ctan
ce
r
atio
(
alig
n
ed
i
n
d
u
cta
n
ce
/u
n
alig
n
e
d
in
d
u
ctan
ce
)
d
ec
r
ea
s
es
s
lig
h
tly
,
f
r
o
m
4
.
8
0
8
% to
4
.
6
4
5
%.
Fig
u
r
e
3
.
Mo
t
o
r
in
d
u
ctan
ce
s
v
er
s
u
s
s
tato
r
s
tack
len
g
th
Fig
u
r
e
4
(
a
)
s
h
o
ws
th
e
av
er
ag
e
to
r
q
u
e
an
d
to
r
q
u
e
r
ip
p
le
wh
en
th
e
len
g
th
o
f
th
e
s
tato
r
s
tack
is
d
ec
r
ea
s
ed
,
wh
ile
Fig
u
r
e
4
(
b
)
s
h
o
ws
th
e
p
er
ce
n
tag
e
o
f
to
r
q
u
e
r
i
p
p
le
(
to
r
q
u
e
r
i
p
p
le/av
er
a
g
e
to
r
q
u
e
)
v
e
r
s
u
s
s
tato
r
len
g
th
.
I
t
h
as
b
ee
n
o
b
s
er
v
ed
th
at
th
e
a
v
er
ag
e
to
r
q
u
e
is
r
ed
u
ce
d
b
y
3
4
.
8
%.
T
h
er
e
is
also
a
d
ec
r
ea
s
e
in
th
e
to
r
q
u
e
r
ip
p
le
v
alu
es,
wh
ile
th
e
p
er
ce
n
tag
e
r
ip
p
le
ex
h
ib
its
a
s
lig
h
t
in
cr
ea
s
e
u
p
to
a
s
tato
r
len
g
th
o
f
7
9
m
m
.
Ho
wev
er
,
b
elo
w
th
is
len
g
th
,
th
er
e
is
a
s
ig
n
if
ica
n
t in
cr
ea
s
e
in
th
e
p
er
ce
n
tag
e
r
i
p
p
le.
Fig
u
r
e
5
clea
r
l
y
s
h
o
ws
th
at
r
e
d
u
cin
g
t
h
e
len
g
t
h
o
f
th
e
s
tato
r
d
ec
r
ea
s
es
b
o
th
th
e
ir
o
n
an
d
co
p
p
er
lo
s
s
es
o
f
s
tato
r
.
Ho
wev
er
,
th
is
r
ed
u
ct
io
n
in
len
g
t
h
h
as n
o
ef
f
ec
t o
n
r
o
to
r
lo
s
s
es.
Her
e,
a
1
5
.
7
9
% r
e
d
u
ctio
n
in
t
h
e
to
tal
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
9
2
I
n
t J Ap
p
l Po
wer
E
n
g
,
Vo
l.
1
5
,
No
.
3
,
Sep
tem
b
er
20
2
6
:
1
1
9
0
-
1
1
9
9
1194
lo
s
s
es
i
s
ac
h
iev
ed
.
I
n
Fig
u
r
e
6
,
it
is
clea
r
th
at
b
o
th
in
p
u
t
an
d
o
u
tp
u
t
p
o
wer
d
ec
r
ea
s
e
as
th
e
s
tato
r
len
g
th
d
ec
r
ea
s
es
d
u
e
to
th
e
lack
o
f
a
r
ea
f
o
r
m
ag
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u
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u
r
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r
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Fig
u
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Fig
u
r
e
6
.
I
n
p
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t a
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t
p
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s
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d
ef
f
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er
s
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s
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r
s
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g
th
Fig
u
r
e
7
.
Po
wer
f
ac
to
r
v
er
s
u
s
s
tato
r
s
tack
len
g
th
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Fig
u
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m
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Fig
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Fig
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1
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.
Po
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.
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g
th
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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t J Ap
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l Po
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E
n
g
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SS
N:
2252
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8
7
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P
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l
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t
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6.
CO
NCLU
SI
O
N
T
h
is
p
ap
er
an
aly
ze
s
a
r
ar
e
in
s
t
an
ce
in
SR
M
d
e
s
ig
n
in
wh
ich
t
h
e
len
g
th
o
f
th
e
s
tato
r
d
o
es
n
o
t
eq
u
al
th
e
len
g
th
o
f
th
e
r
o
t
o
r
.
T
h
e
o
b
je
ctiv
e
o
f
th
is
an
aly
s
is
is
to
ill
u
s
tr
ate
th
e
im
p
licatio
n
s
o
f
s
u
ch
a
d
ev
elo
p
m
en
t.
Sh
o
r
ten
in
g
th
e
s
tato
r
r
ed
u
ce
s
th
e
o
v
e
r
all
we
ig
h
t
w
h
ile
s
h
o
r
t
en
in
g
t
h
e
r
o
to
r
r
ed
u
ce
s
t
h
e
w
eig
h
t
an
d
in
er
tia
o
f
th
e
m
o
to
r
,
m
ak
i
n
g
it
id
ea
l
f
o
r
h
ig
h
-
s
p
ee
d
o
r
p
o
r
tab
le
a
p
p
licati
o
n
s
.
T
h
e
s
h
o
r
ter
s
tack
u
s
es
less
m
ater
ial,
r
ed
u
cin
g
m
an
u
f
ac
tu
r
in
g
co
s
ts
.
Fu
r
th
er
m
o
r
e,
cu
s
to
m
SR
Ms
m
ay
r
eq
u
ir
e
u
n
eq
u
al
s
tato
r
an
d
r
o
to
r
s
tack
len
g
th
s
to
m
ee
t
s
p
ec
if
ic
p
er
f
o
r
m
an
ce
c
r
iter
ia
.
T
h
e
s
im
u
latio
n
r
esu
lts
ar
e
clea
r
: c
er
tain
p
er
f
o
r
m
a
n
ce
in
d
icato
r
s
o
f
th
e
m
o
to
r
ar
e
u
n
af
f
ec
ted
an
d
r
em
ain
alm
o
s
t
co
n
s
is
ten
t
ev
en
wh
en
th
e
len
g
t
h
o
f
th
e
s
tato
r
o
r
r
o
to
r
d
ec
r
ea
s
es
to
6
0
m
m
,
wh
ich
r
ep
r
esen
ts
a
d
ec
r
ea
s
e
o
f
3
3
%.
T
h
ese
in
d
icato
r
s
in
clu
d
e
in
d
u
c
tan
c
e
r
atio
,
ef
f
icien
c
y
,
to
r
q
u
e
r
ip
p
le
an
d
p
ea
k
an
d
m
ea
n
air
g
ap
f
lu
x
d
en
s
ity
.
H
o
wev
er
,
r
ed
u
ci
n
g
th
e
len
g
th
o
f
th
e
s
tato
r
o
r
r
o
to
r
n
eg
at
iv
ely
af
f
ec
ts
o
th
er
p
er
f
o
r
m
an
ce
in
d
icato
r
s
.
T
h
ese
in
clu
d
e:
alig
n
ed
a
n
d
u
n
alig
n
e
d
in
d
u
ctan
ce
s
,
av
er
a
g
e
to
r
q
u
e,
p
er
ce
n
tag
e
to
r
q
u
e
r
ip
p
le,
an
d
in
p
u
t
an
d
o
u
tp
u
t
p
o
wer
s
.
Ho
wev
er
,
th
ese
ch
an
g
es
ar
e
ac
ce
p
tab
le
if
th
e
d
if
f
er
e
n
ce
b
etwe
en
th
e
s
tato
r
an
d
r
o
to
r
len
g
th
s
is
with
in
1
0
%.
T
h
e
wo
r
s
t
-
ca
s
e
s
ce
n
ar
io
was
a
1
0
.
9
%
d
r
o
p
i
n
o
u
t
p
u
t
p
o
wer
wh
en
th
e
r
o
to
r
was
1
0
%
less
len
g
th
t
h
an
t
h
e
s
tato
r
.
As
d
em
o
n
s
tr
ated
a
b
o
v
e
,
th
e
ca
s
e
o
f
u
n
eq
u
al
len
g
th
o
f
t
h
e
s
tato
r
a
n
d
r
o
to
r
ca
n
b
e
p
o
s
ited
as
a
p
o
ten
tial
s
o
lu
tio
n
to
ac
h
iev
e
th
e
o
p
tim
al
d
esig
n
o
f
th
e
SR
M
esp
ec
ially
f
o
r
lo
w
-
c
o
s
t,
lo
w
-
in
er
ti
a,
an
d
h
ig
h
-
s
p
ee
d
m
o
to
r
ap
p
licatio
n
s
.
Fo
r
f
u
tu
r
e
s
tu
d
i
es,
it
i
s
r
ec
o
m
m
en
d
ed
to
ex
te
n
d
th
e
an
aly
s
is
b
y
co
n
s
id
er
in
g
th
er
m
al
ef
f
ec
ts
an
d
m
ec
h
an
ical
lo
s
s
es,
s
in
ce
t
h
ese
f
ac
to
r
s
m
ay
f
u
r
th
er
in
f
l
u
en
ce
th
e
o
p
tim
al
s
elec
tio
n
o
f
s
tack
len
g
th
s
.
Fu
r
th
er
m
o
r
e
,
co
m
b
in
in
g
th
e
u
n
e
q
u
al
-
len
g
th
co
n
ce
p
t
with
ad
v
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ce
d
o
p
tim
izatio
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alg
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r
ith
m
s
co
u
l
d
lead
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m
o
r
e
co
m
p
r
eh
e
n
s
iv
e
p
er
f
o
r
m
a
n
ce
i
m
p
r
o
v
e
m
en
ts
.
Evaluation Warning : The document was created with Spire.PDF for Python.
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DATA AV
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eq
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RE
F
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R
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NC
E
S
[
1
]
R
.
K
r
i
s
h
n
a
n
,
S
w
i
t
c
h
e
d
r
e
l
u
c
t
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e
m
o
t
o
r
d
ri
v
e
s
.
C
R
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2
0
1
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o
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:
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9
7
8
1
4
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0
0
4
1
6
4
4
.
[
2
]
J.
-
R
.
R
i
b
a
,
A
.
G
a
r
c
i
a
,
a
n
d
I
.
R
o
me
r
o
,
“
A
n
e
d
u
c
a
t
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o
n
a
l
t
o
o
l
t
o
a
ss
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e
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g
n
p
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o
f
sw
i
t
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h
e
d
r
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l
u
c
t
a
n
c
e
ma
c
h
i
n
e
s,
”
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n
t
e
r
n
a
t
i
o
n
a
l
J
o
u
r
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a
l
o
f
E
l
e
c
t
ri
c
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l
E
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g
i
n
e
e
ri
n
g
&
Ed
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c
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t
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o
n
,
v
o
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.
5
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.
1
,
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p
.
3
5
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.
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7
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1
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.
[
3
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A
.
F
e
n
e
r
c
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o
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l
u
,
M
.
Ş
.
K
u
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.
Ş
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h
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H
.
Z.
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e
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ş,
a
n
d
T.
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o
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,
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o
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o
met
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p
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6
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4
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Ü
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n
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.
[
4
]
M
.
A
n
a
n
d
,
S
.
Je
b
a
r
a
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E
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a
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.
D
.
P
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n
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.
Evaluation Warning : The document was created with Spire.PDF for Python.