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[
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3
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4
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-
[
1
5
]
.
T
h
e
m
o
to
r
s
w
er
e
o
p
er
ated
o
n
s
in
g
le
p
h
a
s
e
p
o
w
er
s
u
p
p
l
y
b
y
u
s
i
n
g
th
e
ca
p
ac
ito
r
b
an
k
i
n
s
tal
lin
g
to
th
e
ter
m
in
a
l o
f
t
h
e
m
o
t
o
r
[
5
]
,
[
7
]
,
[
1
2
]
-
[
1
5
]
.
B
y
th
i
s
c
o
n
d
itio
n
,
th
e
t
h
r
ee
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p
h
ase
in
d
u
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n
m
o
to
r
o
p
er
at
ed
lik
e
a
s
in
g
le
-
p
h
ase
i
n
d
u
cti
o
n
m
o
to
r
,
esp
ec
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y
ca
p
ac
ito
r
s
tar
t
-
ca
p
ac
ito
r
r
u
n
in
d
u
ctio
n
m
o
to
r
.
So
m
e
o
th
er
s
m
o
d
i
f
icat
io
n
o
p
e
r
atio
n
s
y
s
te
m
h
ad
d
ev
elo
p
ed
b
y
u
s
i
n
g
a
s
in
g
le
p
h
ase
in
v
er
ter
,
p
u
ls
e
w
id
e
m
o
d
u
latio
n
(
P
W
M)
co
n
tr
o
l
tech
n
iq
u
e,
etc.
[
7
]
,
[
1
2
]
-
[
1
8
]
.
A
n
th
o
n
y
[
5
]
h
a
s
p
u
b
lis
h
ed
a
p
ap
er
th
at
d
is
cu
s
s
ed
ab
o
u
t
a
m
et
h
o
d
w
it
h
co
m
p
leted
b
y
an
eq
u
iv
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t
cir
cu
it
f
o
r
an
al
y
zi
n
g
t
h
e
t
h
r
ee
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p
h
a
s
e
in
d
u
c
tio
n
m
o
to
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s
w
h
ile
o
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atin
g
o
n
a
s
i
n
g
le
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p
h
ase
p
o
w
er
s
y
s
te
m
.
T
h
e
eq
u
iv
ale
n
t
cir
c
u
it
w
as
s
u
itab
l
e
f
o
r
an
al
y
zi
n
g
th
e
m
o
to
r
s
w
it
h
an
ac
cu
r
ac
y
ab
o
v
e
9
0
%.
T
h
e
m
o
to
r
h
ad
3
g
r
o
u
p
s
o
f
w
i
n
d
in
g
s
w
it
h
ch
ar
ac
ter
is
tics
s
i
m
ilar
to
a
s
in
g
le
-
p
h
a
s
e
i
n
d
u
ctio
n
m
o
to
r
an
d
co
u
ld
b
e
o
p
er
ated
w
it
h
b
e
tter
p
er
f
o
r
m
an
ce
an
d
p
o
w
er
f
a
cto
r
clo
s
e
to
u
n
it
y
.
I
n
o
th
er
ca
s
es,
t
h
e
s
in
g
le
p
h
a
s
e
in
d
u
ctio
n
m
o
to
r
s
u
s
u
all
y
h
a
v
e
2
w
in
d
i
n
g
s
,
m
ain
a
n
d
au
x
i
liar
y
w
i
n
d
in
g
s
t
h
at
ar
e
in
s
talled
in
t
h
e
s
lo
t
o
n
th
e
m
o
to
r
.
T
h
er
ef
o
r
e,
b
y
atten
t
io
n
to
ab
o
v
e
d
escr
ip
tio
n
ca
n
b
e
s
h
o
w
n
t
h
at
w
h
e
n
a
s
in
g
le
-
p
h
a
s
e
i
n
d
u
ctio
n
m
o
to
r
is
d
esi
g
n
ed
w
it
h
co
n
s
tr
u
cti
o
n
s
i
m
ilar
to
a
t
h
r
ee
-
p
h
ase
i
n
d
u
ctio
n
m
o
to
r
,
o
f
co
u
r
s
e
th
e
s
i
n
g
le
p
h
ase
i
n
d
u
ct
io
n
m
o
to
r
w
il
l
b
e
o
p
er
ate
d
w
i
th
b
etter
p
er
f
o
r
m
a
n
ce
s
a
n
d
p
o
w
er
f
ac
to
r
cl
o
s
e
to
u
n
i
t
y
.
T
h
er
ef
o
r
e,
th
is
s
t
u
d
y
is
in
ten
d
ed
to
d
esig
n
a
s
i
n
g
le
-
p
h
ase
i
n
d
u
ctio
n
m
o
to
r
w
it
h
w
i
n
d
in
g
s
co
n
s
tr
u
c
tio
n
s
i
m
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to
th
at
o
f
a
t
h
r
ee
-
p
h
a
s
e
in
d
u
ctio
n
m
o
to
r
t
h
at
h
ad
2
4
s
lo
ts
o
f
t
h
e
w
i
n
d
i
n
g
s
.
T
h
is
s
t
u
d
y
o
n
l
y
f
o
cu
s
ed
in
d
is
cu
s
s
i
n
g
ab
o
u
t t
h
e
o
u
tp
u
t p
o
w
er
,
p
o
w
er
f
ac
to
r
an
d
ef
f
icien
c
y
o
f
t
h
e
m
o
to
r
.
2.
CO
NVEN
SI
O
NA
L
WI
NDI
NG
D
E
SI
G
N
O
F
S
I
N
G
L
E
P
H
ASE
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N
DUC
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O
N
M
O
T
O
R
Sin
g
le
-
p
h
a
s
e
I
n
d
u
ctio
n
m
o
to
r
s
ar
e
alter
n
ati
n
g
c
u
r
r
en
t
m
o
to
r
th
at
w
id
el
y
u
s
ed
i
n
m
an
y
h
o
u
s
e
ap
p
licatio
n
s
.
T
h
e
m
o
to
r
s
u
s
u
all
y
o
p
er
ate
o
n
s
in
g
le
-
p
h
a
s
e
p
o
w
er
s
y
s
te
m
.
T
h
e
co
n
v
e
n
t
io
n
al
s
i
n
g
le
p
h
a
s
e
in
d
u
ctio
n
m
o
to
r
s
u
s
u
al
l
y
h
a
v
e
2
w
i
n
d
in
g
s
,
th
e
m
ai
n
a
n
d
a
u
x
i
liar
y
w
in
d
i
n
g
s
.
A
s
s
p
ec
ial
l
y
f
o
r
s
in
g
le
-
p
h
a
s
e
ca
p
ac
ito
r
-
s
tar
t
ca
p
ac
ito
r
-
r
u
n
i
n
d
u
ctio
n
m
o
to
r
,
th
e
t
w
o
w
i
n
d
in
g
s
u
s
u
a
ll
y
u
s
ed
f
o
r
s
tar
t
i
n
g
an
d
r
u
n
n
i
n
g
.
T
h
e
m
o
to
r
u
s
u
all
y
u
s
e
2
ca
p
a
cito
r
s
in
o
p
er
atin
g
s
y
s
te
m
,
ie
s
tar
t
ca
p
ac
ito
r
an
d
r
u
n
ca
p
ac
ito
r
.
T
h
e
ca
p
ac
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r
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n
n
ec
to
r
s
to
t
h
e
w
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n
d
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n
g
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o
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th
e
s
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n
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le
p
h
ase
in
d
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m
o
to
r
s
ar
e
s
h
o
w
n
i
n
F
ig
u
r
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1
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d
Fig
u
r
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esp
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tiv
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th
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to
Fig
u
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in
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
a
u
x
i
l
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a
r
y
w
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d
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(
Y
1
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a
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Fig
u
r
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3
.
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p
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s
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m
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to
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3.
RE
S
E
ARCH
M
E
T
H
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D
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h
is
s
tu
d
y
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m
s
to
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s
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h
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w
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h
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o
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s
.
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p
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th
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h
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ase
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E
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2
.
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f
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h
e
E
f
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ie
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y
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h
ar
ac
ter
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o
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th
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m
o
to
r
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is
s
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n
Fi
g
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r
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.
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f
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icie
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ter
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s
tic
o
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ca
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e
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ase
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h
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th
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B
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m
o
to
r
.
5.
CO
NCLU
SI
O
N
T
h
is
s
t
u
d
y
w
a
s
f
o
cu
s
ed
to
d
e
s
ig
n
a
n
e
w
w
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n
d
i
n
g
s
co
n
s
tr
u
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n
o
f
a
s
i
n
g
le
-
p
h
ase
i
n
d
u
c
t
io
n
m
o
to
r
esp
ec
iall
y
f
o
r
'
ca
p
ac
ito
r
-
s
tar
t
ca
p
ac
ito
r
-
r
u
n
i
n
d
u
c
tio
n
m
o
to
r
'
.
T
h
e
w
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n
d
in
g
s
d
esig
n
w
a
s
lik
e
a
t
h
r
ee
-
p
h
as
e
in
d
u
ctio
n
m
o
to
r
‟
s
.
T
h
e
b
es
t
d
esig
n
o
f
th
e
p
r
o
p
o
s
ed
s
in
g
l
e
p
h
ase
i
n
d
u
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n
m
o
to
r
w
a
s
to
u
s
e
a
u
x
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y
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i
n
d
i
n
g
s
1
5
%
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ig
g
er
t
h
a
n
t
h
e
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n
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n
d
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s
.
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h
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p
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in
g
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h
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n
d
u
c
tio
n
m
o
to
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ld
o
p
er
ate
at
th
r
ee
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w
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m
o
to
r
r
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g
w
it
h
b
etter
p
er
f
o
r
m
a
n
ce
.
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h
e
f
o
r
m
u
las
g
iv
e
n
in
t
h
is
s
t
u
d
y
h
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g
h
ac
cu
r
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d
g
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d
to
u
s
e
to
p
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th
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li
n
e
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u
r
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en
t,
p
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to
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d
p
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w
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n
p
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t
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f
t
h
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p
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p
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s
ed
s
in
g
le
p
h
a
s
e
in
d
u
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n
m
o
to
r
.
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NO
WL
E
D
G
E
M
E
NT
S
W
e
w
o
u
ld
lik
e
to
th
an
k
v
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m
u
c
h
to
th
e
tea
m
o
f
th
e
lab
o
r
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r
y
o
f
elec
tr
ical
en
g
i
n
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r
i
n
g
o
f
t
h
e
„
I
n
s
tit
u
te
o
f
T
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P
ad
an
g
(
I
n
s
tit
u
t
T
ek
n
o
lo
g
i
P
ad
an
g
)
‟
w
h
o
s
e
h
e
lp
ed
u
s
in
r
esear
c
h
in
t
h
e
lab
o
r
ato
r
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.
W
e
w
o
u
ld
al
s
o
lik
e
to
th
a
n
k
f
o
r
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Ko
p
er
tis
W
ila
y
a
h
X
'
a
n
d
'Dir
ec
to
r
ate
o
f
R
esear
c
h
an
d
C
o
m
m
u
n
it
y
Ser
v
ice,
Dir
ec
to
r
ate
Gen
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al
f
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r
R
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ar
ch
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d
De
v
elo
p
m
e
n
t
at
th
e
Min
i
s
tr
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o
f
R
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ch
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T
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h
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d
Hi
g
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er
E
d
u
ca
tio
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R
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d
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w
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h
e
lp
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f
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d
t
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is
r
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n
ac
co
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it
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t
h
e
r
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ch
co
n
tr
ac
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m
b
er
5
3
0
/2
7
.
O1
0
.
4
.
2
/P
I
N/
2
0
1
7
.
RE
F
E
R
E
NC
E
S
[1
]
P
.
C.
S
e
n
,
P
rin
c
i
p
les
o
f
El
e
c
tri
c
a
l
M
a
c
h
in
e
s an
d
P
o
w
e
r
El
e
c
tro
n
ics
,
2
n
d
e
d
.
Ne
w
Yo
rk
:
Jo
h
n
W
il
e
y
&
S
o
n
s,
1
9
9
6
.
[2
]
S
.
J.
C
h
a
p
m
a
n
,
El
e
c
rica
l
M
a
c
h
in
e
ry
F
u
n
d
a
m
e
n
tals
,
4
th
e
d
.
Ne
w
Yo
rk
:
M
c
G
ra
w
-
Hill
,
2
0
0
5
.
[3
]
W
.
Ga
n
g
a
n
d
P
.
S
u
n
g
-
W
o
n
,
“
Im
p
ro
v
e
d
Esti
m
a
ti
o
n
o
f
In
d
u
c
ti
o
n
M
o
to
r
Circu
it
P
a
ra
m
e
ter
s
w
it
h
P
u
b
li
s
h
e
d
M
o
t
o
r
P
e
rf
o
rm
a
n
c
e
Da
ta
”
,
Gr
e
e
n
T
e
c
h
n
o
l.
C
o
n
f
.
(
Gr
e
e
n
T
e
c
h
),
2
0
1
4
S
ixth
An
n
u
.
I
EE
E
,
p
p
.
2
5
-
2
8
,
2
0
1
4
.
[4
]
Z.
A
n
th
o
n
y
,
e
t
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ies
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[5
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Z.
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.
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[6
]
G
.
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Evaluation Warning : The document was created with Spire.PDF for Python.
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R.
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.,
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4
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5
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6
]
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.,
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[1
7
]
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.
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d
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p
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a
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.
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h
n
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c
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iv
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h
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se
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se
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h
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se
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rid
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,
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.
[1
8
]
P
.
Brz
e
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lrek
l
a
n
d
J,
P
i
ll
a
y
,
“
In
d
u
k
ti
o
n
M
o
t
o
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e
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e
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e
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in
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le t
o
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re
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se
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”
,
IEE
E
,
1
9
9
0
.
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I
O
G
RAP
H
I
E
S
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F
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RS
Zu
r
i
m
a
n
A
n
th
o
n
y
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l
e
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tu
re
r
in
th
e
In
stit
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te
o
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g
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a
rtme
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t
o
f
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e
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tri
c
a
l
En
g
in
e
e
rin
g
.
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re
se
a
rc
h
‟s
in
tere
st
in
El
e
c
tri
c
a
l
M
a
c
h
in
e
s
a
n
d
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o
n
tro
l
.
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e
re
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e
iv
e
d
a
n
M
.
En
g
f
ro
m
G
a
d
jah
M
a
d
a
Un
iv
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rsit
y
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Yo
g
y
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rta,
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n
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o
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e
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in
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0
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2
.
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lw
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y
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s ab
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h
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n
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h
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rtme
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l
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r
Distrib
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ti
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n
.
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h
e
re
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d
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n
M
.
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g
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ro
m
G
a
d
jah
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a
d
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g
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e
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s ab
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t
t
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d
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c
ti
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o
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a
n
d
p
o
w
e
r
s
y
ste
m
d
i
strib
u
ti
o
n
.
Evaluation Warning : The document was created with Spire.PDF for Python.