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ated
p
r
o
d
u
ctio
n
ex
p
e
n
s
es.
Desig
n
in
g
th
e
m
o
to
r
co
il
with
m
o
r
e
th
an
th
r
ee
p
h
ases
an
d
m
ak
in
g
a
p
o
wer
s
o
u
r
ce
th
at
m
atch
es
th
e
n
u
m
b
er
o
f
p
h
ases
in
th
e
co
il
i
s
o
n
e
way
to
im
p
r
o
v
e
th
e
p
er
f
o
r
m
an
ce
o
f
a
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
[
2
2
]
-
[
4
4
]
.
T
h
is
tech
n
iq
u
e
ca
n
im
p
r
o
v
e
th
e
f
lu
x
d
en
s
ity
[
3
8
]
,
[
3
9
]
,
p
o
we
r
[
3
8
]
,
[
3
9
]
,
to
r
q
u
e
[
3
4
]
,
[
3
5
]
,
an
d
ef
f
icien
cy
[
4
0
]
,
[
4
1
]
o
f
th
e
m
o
to
r
.
I
n
s
p
ite
o
f
th
is
,
ad
d
in
g
m
o
r
e
p
h
ases
to
t
h
e
m
o
to
r
c
o
il
co
s
ts
m
o
r
e
b
ec
au
s
e
a
n
ew
p
o
wer
s
o
u
r
ce
[
2
2
]
-
[
3
7
]
n
ee
d
s
to
b
e
d
e
v
elo
p
ed
alo
n
g
with
a
r
eliab
le
co
n
tr
o
l
s
y
s
tem
an
d
s
af
ety
f
ea
tu
r
es
[
2
3
]
,
[
2
7
]
,
[
2
9
]
,
[
3
0
]
,
[
4
0
]
-
[
4
4
]
th
at
ar
e
r
elate
d
to
th
e
n
u
m
b
er
o
f
p
h
ases
an
d
t
h
e
m
o
to
r
'
s
p
o
wer
o
u
tp
u
t.
B
ec
au
s
e
o
f
th
is
,
a
n
ew
way
n
ee
d
s
to
b
e
f
o
u
n
d
to
m
ak
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
s
wo
r
k
b
etter
with
o
u
t
s
p
en
d
in
g
a
l
o
t o
f
e
x
tr
a
m
o
n
ey
.
R
e
c
e
n
t
s
t
u
d
i
es
d
e
m
o
n
s
t
r
a
t
e
t
h
a
t
o
p
t
i
m
i
zi
n
g
t
h
e
r
o
t
o
r
s
l
o
t
d
e
s
i
g
n
[
4
5
]
a
n
d
m
o
t
o
r
c
o
i
l
d
e
s
i
g
n
[
3
8
]
-
[
4
0
]
,
[
4
6
]
-
[
5
1
]
a
r
e
t
h
e
m
o
s
t
e
c
o
n
o
m
i
c
a
l
a
p
p
r
o
a
c
h
e
s
t
o
a
u
g
m
e
n
ti
n
g
m
o
t
o
r
p
e
r
f
o
r
m
a
n
c
e
.
T
h
a
t'
s
w
h
y
t
h
i
s
s
t
u
d
y
s
u
g
g
e
s
ts
m
a
k
i
n
g
a
n
e
w
t
y
p
e
o
f
s
ta
t
o
r
c
o
i
l
f
o
r
t
h
r
e
e
-
p
h
a
s
e
i
n
d
u
c
t
i
o
n
m
o
t
o
r
s
s
o
t
h
at
t
h
e
y
w
o
r
k
b
e
tt
e
r
.
As
p
a
r
t
o
f
t
h
is
j
o
b
,
a
3
-
p
h
a
s
e
i
n
d
u
c
t
i
o
n
m
o
t
o
r
c
o
i
l
w
i
t
h
a
2
-
l
a
y
e
r
d
e
s
i
g
n
a
n
d
d
i
f
f
e
r
e
n
t
p
o
l
e
c
o
n
f
i
g
u
r
a
t
i
o
n
s
f
o
r
e
a
c
h
l
a
y
e
r
h
a
d
t
o
b
e
b
u
i
l
t
.
W
e
i
m
p
r
o
v
e
d
t
h
e
l
i
n
k
s
b
e
t
w
e
e
n
t
h
e
c
o
i
ls
t
o
i
n
c
r
e
a
s
e
t
h
e
m
a
g
n
e
t
i
c
f
l
u
x
,
w
h
i
c
h
i
m
p
r
o
v
e
d
t
h
e
m
o
t
o
r
'
s
w
o
r
k
.
W
e
t
es
t
e
d
m
o
t
o
r
s
i
n
t
h
e
l
a
b
,
l
o
o
k
i
n
g
a
t
h
o
w
c
u
r
r
e
n
t
,
s
p
e
e
d
,
t
o
t
a
l
p
o
w
e
r
,
a
n
d
m
o
t
o
r
e
f
f
i
c
i
e
n
cy
c
h
a
n
g
e
d
w
h
e
n
t
h
e
l
o
a
d
c
h
a
n
g
e
d
.
T
h
e
p
e
r
f
o
r
m
a
n
c
e
o
f
t
h
e
n
e
w
m
o
t
o
r
w
a
s
c
o
m
p
a
r
e
d
t
o
t
h
a
t
o
f
a
s
ta
n
d
a
r
d
3
-
p
h
a
s
e
i
n
d
u
c
t
i
o
n
m
o
t
o
r
t
h
a
t
h
a
d
t
h
e
s
a
m
e
s
t
at
o
r
,
r
o
t
o
r
,
n
u
m
b
e
r
o
f
s
t
a
t
o
r
s
l
o
ts
,
a
n
d
n
u
m
b
e
r
o
f
t
u
r
n
s
p
e
r
s
l
o
t
as
t
h
e
n
e
w
m
o
t
o
r
.
T
h
e
o
n
l
y
d
i
f
f
e
r
e
n
c
e
b
e
t
w
e
e
n
t
h
e
t
w
o
m
o
t
o
r
s
w
a
s
h
o
w
t
h
e
s
t
a
t
o
r
c
o
il
w
a
s
s
e
t
u
p
.
B
e
c
a
u
s
e
o
f
t
h
i
s
,
th
e
n
e
w
l
y
c
r
e
a
t
e
d
3
-
p
h
a
s
e
i
n
d
u
c
t
i
o
n
m
o
t
o
r
d
i
d
n
o
t
c
o
s
t
a
n
y
t
h
i
n
g
e
x
t
r
a
.
T
h
e
p
r
o
p
o
s
e
d
w
i
n
d
i
n
g
d
e
s
i
g
n
i
s
v
e
r
i
f
i
ed
t
o
b
e
s
u
i
t
a
b
l
e
f
o
r
d
i
f
f
e
r
e
n
t
3
-
p
h
a
s
e
i
n
d
u
c
t
i
o
n
m
o
t
o
r
s
,
i
m
p
r
o
v
i
n
g
p
e
r
f
o
r
m
a
n
c
e
wi
t
h
o
u
t
s
u
b
s
t
a
n
t
i
al
e
x
t
r
a
c
o
s
ts
.
2.
T
H
E
CO
M
P
RE
H
E
NS
I
VE
T
H
E
O
RE
T
I
CA
L
B
ASI
S
W
h
en
m
ak
in
g
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
co
il,
y
o
u
h
av
e
to
lo
o
k
at
s
ev
er
al
f
ac
to
r
s
,
s
u
ch
a
s
th
e
p
o
le
p
itch
,
th
e
n
u
m
b
er
o
f
s
lo
ts
,
an
d
th
e
n
u
m
b
er
o
f
tu
r
n
s
p
e
r
p
o
le.
T
h
e
f
o
llo
win
g
eq
u
atio
n
ca
n
b
e
u
s
ed
to
f
ig
u
r
e
o
u
t
th
e
p
o
le
p
itch
(
τ
)
,
th
e
n
u
m
b
e
r
o
f
s
lo
ts
p
er
p
o
le
(
Q
1
)
,
an
d
th
e
n
u
m
b
er
o
f
s
lo
ts
p
er
p
o
le
p
e
r
p
h
ase
(
q
1
)
co
il
[
5
2
]
.
=
2
⁄
(
1
)
1
=
1
2
⁄
(
2
)
1
=
1
2
1
⁄
(
3
)
I
n
th
is
c
o
n
tex
t,
'
D
'
d
en
o
tes
th
e
s
tato
r
in
n
er
d
iam
eter
(m)
,
'
π'
is
d
ef
in
ed
as
3
.
1
4
,
'
p
'
r
ep
r
es
en
ts
th
e
n
u
m
b
er
o
f
p
o
le
p
air
s
,
'
s
1
'
in
d
icate
s
th
e
n
u
m
b
er
o
f
s
tato
r
s
lo
ts
,
an
d
'
m
1
'
r
ef
er
s
to
th
e
n
u
m
b
er
o
f
s
tato
r
co
il
p
h
ases
u
tili
z
ed
in
th
e
in
d
u
ctio
n
m
o
to
r
.
T
o
d
ef
in
e
th
e
p
o
le
p
itch
(τ
)
in
r
elatio
n
to
th
e
n
u
m
b
er
o
f
s
lo
ts
,
u
s
e
th
e
(
4
)
[
52
]
.
=
1
2
⁄
=
1
(
4
)
T
h
e
co
il p
itch
(
y
)
is
d
ef
in
e
d
as th
e
d
is
tan
ce
b
etwe
en
two
n
eig
h
b
o
r
in
g
co
il si
d
es in
th
e
co
n
s
tr
u
ctio
n
o
f
a
s
in
g
le
p
o
le
[
4
]
.
T
h
e
c
o
il
p
itch
is
ty
p
ically
r
e
n
d
er
e
d
n
ea
r
ly
eq
u
iv
alen
t
to
th
e
p
o
l
e
p
itch
.
Fo
r
s
o
m
e
ap
p
licatio
n
s
,
th
e
co
il
p
itch
m
ay
b
e
r
ed
u
ce
d
(
co
r
d
ed
co
ils
)
.
T
h
e
co
il
p
itch
(
y
)
is
d
eter
m
in
ed
b
y
co
u
n
tin
g
th
e
s
lo
ts
f
r
o
m
th
e
lef
t to
th
e
r
ig
h
t
s
id
e
o
f
th
e
co
il,
e
x
ac
tly
[
52
]:
≤
1
(
5
)
T
he
f
o
llo
win
g
eq
u
atio
n
ca
lcu
l
ates th
e
m
ag
n
itu
d
e
o
f
th
e
elec
t
r
ical
an
g
le
(
)
b
etwe
en
two
ad
j
ac
en
t slo
ts
[
5
2
]
.
=
360
1
⁄
(
6
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
6
9
4
I
n
t J Po
w
E
lec
&
Dr
i Sy
s
t
,
Vo
l.
1
7
,
No
.
1
,
Ma
r
c
h
20
2
6
:
82
-
94
84
T
h
e
co
il
m
ay
d
iv
id
e
in
to
p
ar
a
llel
cu
r
r
en
t
ch
an
n
els
if
th
e
cu
r
r
en
t
o
r
v
o
ltag
e
in
ea
ch
p
h
ase
is
o
v
er
ly
elev
ated
.
I
n
a
s
in
g
le
-
la
y
er
co
il
,
th
e
m
ax
im
u
m
n
u
m
b
er
o
f
p
ar
allel
r
o
u
tes
(
a
)
p
er
p
h
ase
is
eq
u
al
to
th
e
n
u
m
b
er
o
f
p
o
le
p
air
s
(
p
)
;
in
co
n
tr
ast,
in
a
d
o
u
b
le
-
lay
e
r
co
il,
th
is
n
u
m
b
er
is
twice.
A
s
ch
em
atic
r
e
p
r
esen
tatio
n
o
f
th
e
win
d
in
g
d
esig
n
f
o
r
a
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
is
s
h
o
wn
in
Fig
u
r
e
1
.
T
h
e
m
o
to
r
h
as
a
d
o
u
b
le
-
la
y
er
s
tato
r
with
th
e
p
ar
am
eter
s
m
1
=
3
,
2
p
=
2
,
an
d
s
1
=
2
4
at
th
e
tim
e
[
52
]
.
I
n
th
e
win
d
in
g
illu
s
tr
ated
in
th
is
f
ig
u
r
e,
Q
1
is
ca
lcu
lated
as
2
4
d
iv
id
e
d
b
y
2
,
y
ield
in
g
1
2
.
T
h
is
d
en
o
tes
th
e
co
il
p
itch
(
y
)
o
f
a
f
u
ll
-
p
itc
h
co
il.
T
h
e
co
il
p
itch
in
th
is
d
esig
n
h
as b
ee
n
d
im
in
is
h
e
d
v
ia
ch
o
r
d
in
g
,
y
=
8
[
52
].
(
a)
(
b
)
(
c)
Fig
u
r
e
1
.
A
two
-
la
y
er
co
n
f
ig
u
r
atio
n
in
a
th
r
ee
-
p
h
ase
in
d
u
cti
o
n
m
o
t
o
r
with
m
1
=
3
,
2
p
=
2
,
s
1
=
2
4
,
y
=
8
,
a
=
1
,
an
d
q
1
=
4
: (
a)
p
h
ase
A,
(
b
)
p
h
ase
B
,
an
d
(
c)
p
h
ase
C
[
5
2
]
T
h
e
m
o
to
r
'
s
ab
ilit
y
to
m
o
v
e
its
lo
ad
is
b
ased
o
n
th
e
s
tr
e
n
g
th
o
f
th
e
elec
tr
o
d
y
n
a
m
ic
f
o
r
ce
(
F
)
it
p
r
o
d
u
ce
s
wh
en
th
e
co
il'
s
m
ag
n
etic
f
ield
tu
r
n
s
.
T
h
is
r
esu
lts
i
n
a
m
ec
h
an
ical
to
r
q
u
e
(
T
m
)
ca
p
ab
le
o
f
tu
r
n
in
g
th
e
r
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r
.
T
h
e
lin
k
b
etwe
en
elec
tr
o
d
y
n
a
m
ic
f
o
r
ce
(
F
)
a
n
d
m
ec
h
an
ical
to
r
q
u
e
(
T
m
)
is
in
d
icate
d
in
(
7
)
a
n
d
(
8
)
[5
3
].
=
.
.
=
(
∅
/
)
.
.
(
7
)
=
.
(
8
)
W
h
er
e
‘
∅
’
m
ea
n
s
m
ag
n
etic
f
lu
x
(
W
b
)
,
‘
’
is
elec
tr
ic
cu
r
r
en
t
in
th
e
r
o
to
r
c
o
n
d
u
cto
r
(
A
)
,
‘
B
’
r
ep
r
esen
ts
m
ag
n
etic
f
lu
x
d
en
s
ity
(
T
)
,
‘
l
’
is
th
e
ef
f
ec
tiv
e
len
g
th
o
f
th
e
r
o
to
r
co
n
d
u
cto
r
(
m
)
,
‘
A
’
is
th
e
cr
o
s
s
-
s
ec
tio
n
al
ar
ea
o
f
th
e
r
o
to
r
(
m
²)
,
an
d
‘
r
’
is
th
e
r
o
to
r
r
ad
iu
s
(
m
)
.
T
h
e
av
er
a
g
e
m
ag
n
etic
f
lu
x
(
∅
)
i
n
1
c
o
il
an
d
th
e
m
ag
n
itu
d
e
o
f
th
e
s
tato
r
win
d
in
g
r
m
s
E
MF
(
E
1
)
g
en
er
ate
d
in
th
e
s
tato
r
c
o
il
ca
n
b
e
ca
lcu
lated
as
(
9
)
a
n
d
(
1
0
)
[
52
]
.
∅
=
2
/
(
9
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J Po
w
E
lec
&
Dr
i Sy
s
t
I
SS
N:
2088
-
8
6
9
4
A
n
in
n
o
va
tive
w
in
d
in
g
c
o
n
fig
u
r
a
tio
n
to
en
h
a
n
ce
3
-
p
h
a
s
e
in
d
u
ctio
n
mo
t
o
r
p
erfo
r
ma
n
c
e
(
Zu
r
ima
n
A
n
th
o
n
y
)
85
1
=
√
2
1
1
∅
(
10
)
W
h
er
e
L
is
s
tato
r
s
tack
len
g
th
(
m
)
,
B
m
is
m
ax
im
u
m
f
lu
x
d
en
s
ity
in
th
e
air
g
ap
,
N
1
is
th
e
n
u
m
b
er
o
f
s
tato
r
co
il
tu
r
n
s
,
k
w1
=
win
d
in
g
f
ac
to
r
,
a
n
d
f
is
s
o
u
r
ce
f
r
e
q
u
en
c
y
.
T
h
e
r
o
to
r
cu
r
r
en
t
r
ef
er
r
e
d
to
as
th
e
s
tato
r
win
d
in
g
(
I
2
)
an
d
th
e
m
ec
h
an
ical
p
o
wer
co
n
v
er
ted
to
d
r
iv
e
th
e
r
o
to
r
(
P
m
)
,
ca
n
th
en
b
e
ca
lcu
lated
u
s
in
g
(
1
1
)
an
d
(
1
2
)
[
53
]
.
2
=
1
(
2
+
2
)
⁄
(
11
)
=
3
(
2
)
2
2
(
1
−
)
(
12
)
W
h
er
e
s
is
s
lip
,
R
2
d
en
o
tes
th
e
r
o
to
r
win
d
in
g
r
esis
tan
ce
as
r
ef
er
en
ce
d
to
th
e
s
tato
r
s
y
s
tem
(
Ω
)
,
w
h
er
ea
s
X
2
s
ig
n
if
ies th
e
r
o
to
r
win
d
in
g
lea
k
ag
e
r
ea
ctan
ce
also
r
ef
er
e
n
ce
d
to
th
e
s
tato
r
s
y
s
tem
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Ω
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.
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n
ca
lcu
late
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e
s
ize
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t
h
e
m
ec
h
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ical
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o
r
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u
e
f
r
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m
th
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il
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T
m
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th
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o
u
tp
u
t
p
o
wer
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P
out
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th
e
lo
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to
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q
u
e
(
T
L
)
,
th
e
in
p
u
t
p
o
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(
P
in
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,
an
d
th
e
r
o
to
r
s
p
ee
d
(
)
,
an
d
th
e
ef
f
icien
c
y
(
η
)
o
f
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
u
s
in
g
th
is
(
1
3
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-
(
1
8
)
[
53
]
:
=
⁄
(
13
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=
−
(
14
)
=
⁄
(
15
)
=
√
3
.
.
.
(
16
)
=
2
.
.
/
60
(
17
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=
(
/
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×
100%
(
18
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wh
er
e
N
r
d
e
n
o
tes
r
o
to
r
s
p
ee
d
(
r
ev
/m
in
)
,
V
LL
r
ep
r
esen
ts
t
h
e
l
in
e
-
to
-
lin
e
v
o
ltag
e,
I
L
s
ig
n
if
ie
s
lin
e
cu
r
r
en
t,
an
d
C
o
s
in
d
icate
s
th
e
m
o
t
o
r
'
s
p
o
wer
f
ac
to
r
.
3.
M
E
T
H
O
D
I
n
th
e
E
lectr
ical
E
n
g
in
ee
r
i
n
g
L
ab
o
r
ato
r
y
o
f
t
h
e
Pad
an
g
I
n
s
titu
te
o
f
T
ec
h
n
o
lo
g
y
,
th
e
s
tu
d
y
co
m
p
a
r
e
d
th
e
p
er
f
o
r
m
an
ce
o
f
a
b
r
an
d
-
n
e
w
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
to
th
at
o
f
a
n
o
r
m
al
th
r
ee
-
p
h
a
s
e
in
d
u
ctio
n
m
o
to
r
.
B
o
th
m
o
to
r
s
h
av
e
th
e
s
am
e
s
etu
p
r
eg
ar
d
in
g
th
eir
r
o
to
r
,
s
tato
r
,
p
o
le
co
u
n
t,
s
tato
r
s
lo
t
n
u
m
b
er
,
co
il
ty
p
e,
a
n
d
co
il
cu
r
r
en
t
ch
ar
ac
ter
is
tics
.
T
h
is
s
tu
d
y
is
m
o
s
tly
ab
o
u
t
d
esig
n
in
g
th
e
s
tato
r
co
il
f
o
r
a
3
-
p
h
a
s
e
in
d
u
ctio
n
m
o
to
r
th
at
n
ee
d
s
t
o
wo
r
k
at
5
0
Hz,
3
8
0
V,
Y
c
o
n
n
ec
ti
o
n
,
2
A,
1
3
9
0
r
p
m
,
2
4
s
lo
ts
,
an
d
4
p
o
les
,
an
d
u
s
e
a
0
.
6
m
m
co
il
with
1
1
0
s
p
in
s
p
er
s
lo
t.
T
h
e
s
tan
d
ar
d
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
co
il
is
m
ad
e
u
p
o
f
a
s
i
n
g
le
-
lay
er
co
il
with
1
1
0
tu
r
n
s
in
ea
ch
s
lo
t.
T
h
er
e
ar
e
two
lay
er
s
o
f
co
ils
in
th
e
n
ew
d
esig
n
o
f
th
e
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
co
il.
E
ac
h
lay
er
h
as
a
d
if
f
er
en
t
3
-
p
h
ase
co
il
d
esig
n
th
at
is
s
p
ec
if
i
c
to
its
p
o
le.
I
n
th
e
ch
an
g
ed
m
o
to
r
,
ea
ch
lay
er
h
a
s
5
5
tu
r
n
s
,
g
iv
in
g
ea
ch
s
lo
t
a
to
tal
o
f
1
1
0
tu
r
n
s
.
W
e
ass
ess
h
o
w
well
b
o
th
m
o
to
r
s
wo
r
k
b
y
l
o
o
k
in
g
at
h
o
w
c
o
il
cu
r
r
en
t,
s
p
ee
d
,
to
r
q
u
e,
an
d
m
o
to
r
ef
f
icien
c
y
ch
an
g
e
wh
e
n
d
if
f
er
en
t
lo
ad
s
a
r
e
ap
p
lied
.
Fig
u
r
e
2
s
h
o
ws
h
o
w
t
h
e
s
tato
r
co
il
o
f
a
n
o
r
m
al
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
is
s
et
u
p
.
I
t
h
as
2
4
s
lo
ts
an
d
4
p
o
les.
T
h
er
e
ar
e
th
r
ee
c
o
ils
in
th
is
co
n
f
ig
u
r
atio
n
:
A,
B
,
a
n
d
C
.
I
n
a
Y
-
co
n
n
ec
tio
n
m
et
h
o
d
,
th
e
3
-
p
h
ase
s
u
p
p
ly
is
co
n
n
ec
ted
t
o
ter
m
in
als
A1
,
B
1
,
an
d
C
1
,
an
d
ter
m
in
a
ls
A2
,
B
2
,
an
d
C
2
ar
e
lin
k
ed
to
g
eth
er
(
n
e
u
tr
al
p
o
in
t)
.
T
h
i
s
lay
o
u
t
m
ak
es
th
e
m
o
to
r
wo
r
k
p
r
o
p
er
l
y
.
T
h
e
n
ew
t
h
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
in
clu
d
es
a
s
tato
r
co
il
lay
o
u
t
with
two
lay
e
r
s
.
T
h
e
f
ir
s
t
lay
er
m
ir
r
o
r
s
th
e
d
esig
n
d
ep
icted
i
n
Fig
u
r
e
2
,
co
m
p
r
is
in
g
c
o
ils
A,
B
,
an
d
C
,
w
h
ile
th
e
s
ec
o
n
d
l
ay
er
,
illu
s
tr
ated
in
Fig
u
r
e
3
,
co
n
s
is
ts
o
f
co
ils
D,
E
,
an
d
F,
ac
h
iev
e
d
b
y
d
is
p
laci
n
g
th
e
co
il
p
lace
m
e
n
t
b
y
o
n
e
s
lo
t.
Fig
u
r
e
2
(
f
ir
s
t
lay
er
)
s
h
o
ws
th
at
th
e
b
eg
in
n
in
g
o
f
th
e
f
ir
s
t
co
il
(
A1
)
s
tar
ts
at
s
lo
t
n
u
m
b
er
1
wh
ile
Fig
u
r
e
3
(
s
ec
o
n
d
lay
e
r
)
s
h
o
ws
th
e
b
eg
in
n
in
g
o
f
th
e
f
i
r
s
t
co
il
(
D1
)
s
tar
ts
at
s
lo
t
n
u
m
b
er
2
(
s
h
if
ted
1
s
lo
t)
.
R
ef
er
r
in
g
to
(
3
)
with
th
e
n
u
m
b
er
o
f
s
tato
r
s
lo
ts
2
4
,
4
p
o
le
d
esig
n
,
th
en
th
e
d
is
tan
ce
b
etwe
en
1
s
lo
t
is
3
0
°,
s
o
t
h
e
co
il
d
esig
n
is
s
im
ilar
to
th
e
3
0
°
asy
m
m
etr
ical
6
-
p
h
ase
co
il
d
esig
n
.
T
h
is
n
ew
co
i
l
d
esig
n
s
till
u
s
es
a
0
.
6
0
m
m
co
il,
b
u
t
with
th
e
n
u
m
b
er
o
f
tu
r
n
s
p
er
s
lo
t
f
o
r
e
ac
h
lay
er
as
m
an
y
as
5
5
t
u
r
n
s
(
h
alf
o
f
th
e
co
n
v
en
tio
n
al
d
esig
n
)
,
s
o
th
at
t
h
e
to
tal
1
s
lo
t
is
s
til
l
f
illed
with
1
1
0
t
u
r
n
s
(
th
e
s
am
e
as
th
e
co
n
v
en
ti
o
n
al
d
esig
n
)
,
s
o
t
h
er
e
is
n
o
a
d
d
itio
n
al
co
s
t
o
n
th
e
n
ew
m
o
to
r
d
esig
n
.
T
h
e
n
o
v
elt
y
o
f
th
is
r
esear
ch
lies
in
th
e
f
o
r
m
o
f
a
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lay
er
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o
il
d
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n
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ted
wh
er
e
in
th
is
n
ew
d
esig
n
a
p
air
o
f
p
o
le
s
(
n
o
r
th
an
d
s
o
u
th
p
o
les)
is
cr
ea
ted
o
n
e
ac
h
lay
e
r
,
wh
ile
in
t
h
e
co
n
v
en
tio
n
al
2
-
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
6
9
4
I
n
t J Po
w
E
lec
&
Dr
i Sy
s
t
,
Vo
l.
1
7
,
No
.
1
,
Ma
r
c
h
20
2
6
:
82
-
94
86
lay
er
d
esig
n
t
h
e
f
ir
s
t
lay
er
a
n
d
th
e
s
ec
o
n
d
lay
e
r
ar
e
c
o
m
b
in
ed
to
cr
ea
te
a
c
o
m
m
o
n
p
o
le
p
air
.
Fig
u
r
e
4
illu
s
tr
ates
th
e
f
u
n
d
am
en
tal
d
if
f
er
en
ce
b
etwe
e
n
th
e
c
o
n
v
e
n
tio
n
al
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
co
il
d
esig
n
an
d
th
e
p
r
o
p
o
s
ed
n
ew
co
il
d
esig
n
,
with
Fig
u
r
e
4
(
a)
f
o
r
a
s
in
g
le
-
lay
e
r
co
n
v
e
n
tio
n
al
co
il
d
esig
n
,
Fig
u
r
e
4
(
b
)
f
o
r
a
two
-
lay
er
co
n
v
e
n
tio
n
al
co
il
d
esig
n
,
an
d
Fig
u
r
e
4
(
c)
f
o
r
a
two
-
la
y
er
p
r
o
p
o
s
ed
co
il
d
esig
n
,
wh
e
r
e
'
τ
'
r
ep
r
esen
ts
th
e
p
o
le
p
itch
o
f
th
e
co
il.
Fig
u
r
e
4
illu
s
tr
ates
th
at
th
e
r
ed
lin
e
r
ep
r
esen
ts
th
e
co
il
in
th
e
f
ir
s
t
lay
er
,
wh
ile
th
e
g
r
ee
n
lin
e
r
ep
r
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ts
th
e
c
o
il
in
th
e
s
ec
o
n
d
lay
e
r
.
T
o
co
n
n
ec
t
t
h
e
co
ils
o
f
t
h
e
n
ew
m
o
to
r
d
esig
n
as
s
h
o
wn
in
Fig
u
r
e
4
(
c)
u
s
in
g
a
Y
-
c
o
n
n
e
ctio
n
s
y
s
tem
,
th
e
f
ir
s
t
lay
er
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il
co
n
n
ec
tio
n
(
Fig
u
r
e
2
)
m
u
s
t
b
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jo
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ec
o
n
d
lay
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il
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n
n
ec
tio
n
(
Fig
u
r
e
3
)
as
s
h
o
wn
in
Fig
u
r
e
5
.
I
n
Fig
u
r
e
5
,
we
ca
n
s
ee
th
at
th
e
3
-
p
h
ase
p
o
we
r
s
o
u
r
ce
s
(
L
1
,
L
2
,
an
d
L
3
)
ar
e
co
n
n
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ted
s
eq
u
en
tially
to
t
h
e
en
d
s
o
f
th
e
co
ils
A1
,
B
1
,
an
d
C
1
.
B
y
u
s
in
g
th
is
m
eth
o
d
,
t
h
e
m
o
to
r
will wo
r
k
li
k
e
an
asy
m
m
etr
ical
6
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
with
b
etter
f
lu
x
d
en
s
ity
.
Fig
u
r
e
2
.
T
h
e
s
tato
r
co
il d
esig
n
in
a
s
tan
d
ar
d
3
-
p
h
ase
in
d
u
ctio
n
m
o
t
o
r
co
m
p
r
is
es a
4
-
p
o
le,
2
4
-
s
lo
t
ar
r
an
g
em
e
n
t
Fig
u
r
e
3
.
T
h
e
co
n
f
ig
u
r
atio
n
o
f
th
e
s
tato
r
co
il in
th
e
s
ec
o
n
d
la
y
er
o
f
t
h
e
n
o
v
el
d
esig
n
f
o
r
a
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
f
ea
tu
r
es a
f
o
u
r
-
p
o
le,
2
4
-
s
lo
t a
r
r
an
g
em
e
n
t
(
a)
(
b
)
(
c)
Fig
u
r
e
4
.
T
h
e
d
if
f
er
en
t f
o
r
m
s
o
f
4
-
p
o
le,
24
-
s
lo
t c
o
il d
esig
n
s
f
o
r
p
h
ase
A
(
p
h
ase
L
1
)
in
clu
d
e
(
a)
a
s
in
g
le
-
lay
e
r
co
il c
o
n
v
e
n
tio
n
al
d
esig
n
,
(
b
)
a
two
-
lay
er
co
il c
o
n
v
e
n
tio
n
al
d
esig
n
,
an
d
(
c
)
a
two
-
la
y
er
co
il
p
r
o
p
o
s
ed
d
esig
n
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6
9
4
A
n
in
n
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tive
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in
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in
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fig
u
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3
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87
Fig
u
r
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5
.
T
h
e
co
n
n
ec
tio
n
f
o
r
m
o
f
th
e
f
ir
s
t a
n
d
th
e
s
ec
o
n
d
lay
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ils
o
f
th
e
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ew
d
esig
n
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
Fig
u
r
e
6
d
e
p
icts
th
e
s
tr
u
ctu
r
e
o
f
th
e
in
d
u
ctio
n
m
o
to
r
p
er
f
o
r
m
an
ce
test
in
g
p
r
o
t
o
co
l
co
n
d
u
cted
in
th
e
lab
o
r
ato
r
y
.
Fig
u
r
e
6
d
e
p
icts
th
e
d
ir
ec
t
co
u
p
lin
g
o
f
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
with
a
1
-
p
h
ase
in
d
u
ctio
n
g
en
er
ato
r
,
wh
ich
is
u
n
d
er
a
g
r
ad
u
ally
in
c
r
ea
s
in
g
in
ca
n
d
es
ce
n
t
b
u
lb
lo
ad
.
A
3
-
p
h
ase
elec
tr
ic
p
o
wer
s
o
u
r
ce
en
er
g
i
z
ed
th
e
3
-
p
h
ase
in
d
u
cti
o
n
m
o
to
r
,
wh
ich
t
h
en
r
a
n
th
e
in
d
u
ctio
n
g
en
er
ato
r
.
T
h
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
is
s
u
b
jecte
d
to
v
ar
io
u
s
test
s
b
y
m
o
d
if
y
in
g
th
e
l
o
ad
p
r
o
v
id
e
d
to
it
wh
ile
s
im
u
ltan
eo
u
s
ly
r
eg
u
latin
g
th
e
lo
a
d
o
f
th
e
d
ir
ec
tly
co
n
n
ec
ted
in
d
u
ctio
n
g
en
er
ato
r
.
A
3
-
p
h
ase
d
ig
ita
l p
o
wer
m
eter
was lin
k
ed
to
th
e
m
o
to
r
to
m
ea
s
u
r
e
f
r
eq
u
e
n
cy
,
c
u
r
r
e
n
t,
p
o
wer
f
a
cto
r
,
v
o
ltag
e,
a
n
d
i
n
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u
t
p
o
w
er
,
wh
ile
a
1
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p
h
ase
d
ig
ital
p
o
wer
m
eter
o
n
th
e
in
d
u
ctio
n
g
en
e
r
ato
r
d
o
c
u
m
en
t
ed
th
e
o
u
tp
u
t
in
ter
m
s
o
f
f
r
eq
u
en
cy
,
cu
r
r
en
t,
p
o
wer
f
ac
to
r
,
v
o
ltag
e,
a
n
d
in
p
u
t
p
o
wer
.
T
h
e
g
en
er
at
o
r
'
s
in
p
u
t
p
o
wer
s
er
v
es
as
th
e
o
u
tp
u
t
p
o
wer
f
o
r
th
e
3
-
p
h
ase
i
n
d
u
ctio
n
m
o
to
r
,
as
th
e
m
o
to
r
is
d
ir
ec
tly
lin
k
ed
to
th
e
g
en
er
ato
r
.
T
h
e
r
o
to
r
s
p
ee
d
is
q
u
an
t
if
ied
u
s
in
g
a
d
ig
ital
tach
o
m
et
er
,
af
ter
wh
ich
lo
ad
to
r
q
u
e
a
n
d
m
o
t
o
r
ef
f
icien
cy
ar
e
co
m
p
u
ted
em
p
lo
y
in
g
(
1
5)
t
o
(
1
8
)
.
W
e
th
en
d
is
p
lay
ed
th
e
e
x
p
er
im
en
tal
r
esu
lts
o
f
th
e
m
o
t
o
r
s
'
p
er
f
o
r
m
a
n
ce
i
n
a
tab
le
an
d
g
r
ap
h
f
o
r
an
aly
tica
l
ev
alu
atio
n
.
T
o
s
tr
en
g
th
e
n
t
h
e
an
aly
s
is
o
f
m
o
to
r
ch
ar
ac
ter
is
tics
p
r
o
d
u
ce
d
b
y
th
e
n
ew
co
il
d
esig
n
in
ter
m
s
o
f
i
n
cr
ea
s
in
g
m
o
t
o
r
o
u
tp
u
t
p
o
wer
,
m
o
to
r
co
il
d
esig
n
m
o
d
elin
g
was a
ls
o
ca
r
r
ie
d
o
u
t
u
s
in
g
th
e
'
An
s
y
s
Mo
to
r
-
C
AD
v
2
0
2
4
.
1
.
1
'
p
r
o
g
r
am
.
Fig
u
r
e
6
.
An
i
n
d
u
ctio
n
m
o
t
o
r
p
er
f
o
r
m
an
ce
test
in
g
p
r
o
ce
d
u
r
e
4.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
I
n
th
e
lab
,
we
test
ed
h
o
w
well
b
o
th
tr
ad
itio
n
al
an
d
n
e
w
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
s
wo
r
k
ed
b
y
ch
an
g
in
g
th
e
lo
ad
o
n
ea
ch
m
o
to
r
a
n
d
c
h
ec
k
in
g
ch
a
n
g
es
in
cu
r
r
e
n
t,
s
p
ee
d
,
lo
ad
to
r
q
u
e,
an
d
ef
f
icien
cy
.
T
h
e
lab
o
r
ato
r
y
test
in
g
o
f
b
o
th
m
o
t
o
r
s
y
ield
e
d
p
er
f
o
r
m
an
ce
d
ata
illu
s
tr
ated
in
Fig
u
r
es
7
to
9
.
T
ab
le
1
en
ca
p
s
u
lates
th
e
d
etailed
d
ata
o
n
b
o
th
m
o
t
o
r
p
er
f
o
r
m
an
ce
s
.
Fig
u
r
es
7
to
9
s
h
o
w
th
at
T
L
(
ND)
,
Nr
(
ND)
,
Po
u
t
(
ND)
,
E
f
f
(
ND)
,
an
d
I
(
ND)
r
e
p
r
esen
t
t
h
e
lo
ad
to
r
q
u
e,
r
o
to
r
s
p
ee
d
,
o
u
tp
u
t
p
o
wer
(
m
o
t
o
r
lo
ad
)
,
e
f
f
icien
cy
,
an
d
co
il
cu
r
r
en
t
i
n
th
e
n
ew
d
esig
n
m
o
to
r
.
T
L
(
M3
)
,
Nr
(
M
3
)
,
Po
u
t(
M3
)
,
E
f
f
(
M
3
)
,
a
n
d
I
(
M3
)
r
ep
r
esen
t
t
h
e
s
am
e
m
ea
s
u
r
em
en
ts
in
th
e
tr
a
d
itio
n
al
in
d
u
ctio
n
m
o
to
r
.
Fig
u
r
e
1
0
s
h
o
ws
th
e
d
esig
n
f
o
r
m
o
f
t
h
e
t
r
ad
itio
n
al
in
d
u
ctio
n
m
o
to
r
co
il
an
d
th
e
n
ew
d
esig
n
m
o
to
r
u
s
in
g
t
h
e
'
An
s
y
s
Mo
to
r
-
C
AD
v
2
0
2
4
.
1
.
1
'
p
r
o
g
r
a
m
,
wh
ile
Fig
u
r
es
1
1
an
d
1
2
d
is
p
lay
th
e
s
im
u
latio
n
r
esu
l
ts
.
I
t
is
clea
r
f
r
o
m
lo
o
k
i
n
g
at
Fig
u
r
e
7
th
at
th
e
n
ew
d
esig
n
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
h
as
b
etter
lo
ad
p
o
wer
(
T
L
)
an
d
r
o
to
r
s
p
ee
d
(
Nr
)
th
an
th
e
o
ld
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
.
L
o
o
k
in
g
at
Fig
u
r
e
7
an
d
T
ab
le
1
s
h
o
ws
th
at
th
e
u
p
d
ated
d
esig
n
o
f
th
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
ca
n
h
an
d
le
a
lo
ad
to
r
q
u
e
o
f
5
.
7
7
Nm
at
a
s
p
ee
d
o
f
1
3
9
0
r
p
m
.
T
h
e
n
o
r
m
al
th
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
h
as
a
p
ea
k
lo
ad
to
r
q
u
e
o
f
4
.
8
7
Nm
an
d
a
s
p
ee
d
o
f
1
3
8
0
r
p
m
.
T
h
e
r
esear
c
h
s
h
o
w
s
th
at
th
e
n
ew
d
esig
n
o
f
th
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
is
b
etter
th
an
th
e
o
ld
o
n
e.
T
h
e
lo
ad
to
r
q
u
e
(
T
L
)
g
o
es
u
p
b
y
1
8
.
1
8
%
,
an
d
th
e
r
o
to
r
s
p
ee
d
g
o
es
u
p
b
y
0
.
7
2%
.
T
h
e
p
h
en
o
m
e
n
o
n
ca
n
b
e
ex
p
lain
ed
b
y
th
e
n
ew
d
esig
n
o
f
th
e
m
o
to
r
c
o
ils
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