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ce
h
i
g
h
f
r
eq
u
en
c
y
cu
r
r
en
t
r
ip
p
le,
b
u
t
t
h
is
i
n
cr
ea
s
es
th
e
o
v
er
all
co
s
t
as
w
e
ll
as
r
esu
lti
n
g
in
d
y
n
a
m
ic
a
n
d
r
eso
n
an
t
p
r
o
b
le
m
s
.
T
o
m
ai
n
tai
n
s
m
o
o
t
h
v
o
ltag
e
/cu
r
r
en
t
ac
r
o
s
s
th
e
DC
s
o
u
r
ce
w
it
h
o
u
t
ad
d
in
g
th
e
e
x
ter
n
al
L
C
f
ilter
,
th
e
n
e
w
to
p
o
lo
g
y
o
f
Z
-
s
o
u
r
ce
n
et
w
o
r
k
n
a
m
ed
as
E
m
b
ed
d
ed
Z
-
So
u
r
c
e
I
n
v
er
ter
(
E
Z
SI)
w
as
p
r
o
p
o
s
ed
an
d
an
al
y
ze
d
in
[
2
1
]
-
[
2
3
]
.
T
h
e
ab
o
v
e
liter
atu
r
e
d
o
es
n
o
t
d
ea
l
w
i
th
t
h
e
co
m
p
ar
is
o
n
o
f
s
in
u
s
o
id
al
P
W
M
c
o
n
tr
o
lled
E
Z
SI
f
ed
in
d
u
ctio
n
m
o
to
r
an
d
s
p
ac
e
v
ec
to
r
m
o
d
u
la
ted
E
Z
SI
f
ed
in
d
u
ct
io
n
m
o
to
r
.
2.
O
P
E
RAT
I
N
G
P
RINC
I
P
L
E
O
F
E
M
B
E
DDED
E
Z
-
SO
UR
CE
I
NV
E
R
T
E
R
T
h
e
t
w
o
lev
el
v
o
lta
g
e
t
y
p
e
E
Z
-
s
o
u
r
ce
is
s
h
o
w
n
in
Fi
g
u
r
e
1
h
as
its
t
w
o
d
c
s
o
u
r
ce
s
ea
ch
o
f
V
dc
/2
ar
e
e
m
b
ed
d
ed
w
it
h
i
n
t
h
e
X
s
h
ap
ed
L
C
i
m
p
ed
a
n
ce
n
et
w
o
r
k
.
T
h
e
i
m
p
ed
an
ce
n
et
w
o
r
k
is
a
s
y
m
m
etr
ical
n
et
w
o
r
k
it
is
ass
u
m
ed
th
a
t
th
e
v
al
u
e
o
f
in
d
u
cta
n
ce
s
L
1
=L
2
=
L
a
n
d
th
e
v
alu
e
o
f
ca
p
ac
itan
ce
s
C
1
=C
2
=C.
T
h
e
in
d
u
cti
v
e
ele
m
e
n
ts
p
r
esen
t
i
n
th
e
n
et
wo
r
k
ar
e
u
s
ed
f
o
r
f
ilter
in
g
t
h
e
cu
r
r
en
t
d
r
a
w
n
f
r
o
m
th
e
t
w
o
DC
s
o
u
r
ce
s
;
th
i
s
eli
m
i
n
ate
s
th
e
r
eq
u
ir
e
m
en
t
o
f
ex
ter
n
al
L
C
f
il
ter
an
d
th
e
s
i
ze
o
f
th
e
ca
p
ac
ito
r
is
also
r
ed
u
ce
d
[
2
1
]
.
A
s
t
h
e
i
m
p
ed
an
ce
n
et
w
o
r
k
i
s
ad
d
ed
w
it
h
t
h
e
t
h
r
ee
p
h
ase
in
v
er
ter
b
r
id
g
e
cir
cu
it
an
y
t
w
o
s
w
itc
h
es
ca
n
b
e
t
u
r
n
ed
o
n
s
af
el
y
i
n
o
r
d
er
to
in
tr
o
d
u
ce
t
h
e
s
h
o
o
t
-
th
r
o
u
g
h
o
r
s
h
o
r
t
cir
cu
it
s
tate.
Si
n
ce
t
h
e
c
u
r
r
en
t
p
at
h
s
i
n
D
C
f
r
o
n
te
n
d
ar
e
ef
f
ec
tiv
e
l
y
li
m
i
ted
b
y
i
n
d
u
c
ti
v
e
ele
m
e
n
t
L
1
,
L
2
o
r
b
y
b
o
th
.
T
h
e
in
s
er
ted
s
h
o
o
t
-
t
h
r
o
u
g
h
ex
h
ib
it
t
h
e
v
o
ltag
e
b
o
o
s
tin
g
ca
p
ab
ilit
y
,
j
u
s
t
lik
e
Z
-
So
u
r
ce
i
n
v
er
ter
an
d
ca
n
b
e
p
r
o
v
en
w
i
th
t
h
e
g
ai
n
ex
p
r
ess
i
o
n
d
er
iv
ed
f
r
o
m
t
h
e
in
v
er
ter
-
s
ta
te
eq
u
atio
n
s
d
u
r
i
n
g
s
h
o
o
t
-
th
r
o
u
g
h
an
d
n
o
n
-
s
h
o
o
t
-
t
h
r
o
u
g
h
s
tat
es
ex
p
r
es
s
e
d
b
y
(
1
)
-
(
4
)
.
T
h
e
n
o
n
-
s
h
o
o
t
th
r
o
u
h
s
tate
ca
n
r
e
p
r
esen
t
an
y
o
f
it
s
s
i
x
tr
ad
itio
n
al
ac
ti
v
e
s
tates
(i
1
0
)
alo
n
g
with
t
w
o
n
u
ll
s
tates
(i
1
=0
)
ar
e
s
o
lely
d
eter
m
i
n
ed
b
y
th
e
m
o
d
u
latio
n
p
r
o
ce
s
s
.
Fig
u
r
e
1.
T
w
o
lev
el
v
o
ltag
e
t
y
p
e
T
h
r
ee
-
p
h
ase
E
m
b
ed
d
ed
Z
-
So
u
r
ce
I
n
v
er
ter
E
Z
SI
h
as
s
h
o
o
t
-
t
h
r
o
u
g
h
ze
r
o
s
tate
a
s
i
n
Z
SI.
T
h
e
eq
u
iv
ale
n
t
cir
c
u
it
o
f
E
Z
SI
d
u
r
in
g
s
h
o
o
t
-
th
r
o
u
g
h
s
tate
is
s
h
o
w
n
i
n
Fig
u
r
e
2
(
a)
.
T
h
e
f
r
o
n
t
-
e
n
d
d
io
d
e
D
is
r
e
v
er
s
e
b
iased
w
h
e
n
t
h
e
cir
c
u
it
i
s
i
n
it
s
s
h
o
o
t
-
t
h
r
o
u
g
h
s
tate.
T
h
e
eq
u
iv
ale
n
t c
ir
cu
i
t o
f
E
Z
SI
f
o
r
n
o
n
s
h
o
o
t th
r
o
u
g
h
s
t
ate
is
s
h
o
w
n
i
n
Fi
g
u
r
e
2
(
b
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.
2
.
1
.
Act
iv
e
s
t
a
t
e
T
h
e
in
v
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ter
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p
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ated
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T
h
e
d
io
d
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D
is
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o
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w
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.
T
h
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lo
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th
e
I
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r
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e
cu
r
r
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s
o
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r
ce
as
s
h
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w
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Fi
g
u
r
e
2
(
b
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.
(
T
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s
w
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es
S
x
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Sx
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A
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B
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D
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ON.
Fo
r
tim
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T
1
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=
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+
2
=
2
=
=
0
(
1
)
=
+
=
−
≠
0
(
2
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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8
8
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2
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2
.
No
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o
t
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T
hro
ug
h z
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a
t
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n
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ter
b
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i
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g
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n
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s
t
w
o
n
o
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s
h
o
o
t
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th
r
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g
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ze
r
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s
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n
v
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ter
s
h
o
r
t c
ir
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it
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e
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u
g
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s
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h
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b
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e
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o
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it.
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h
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i
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p
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t
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o
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r
s
ac
r
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th
e
in
d
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d
ca
p
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r
.
B
u
t
n
o
in
v
er
ter
o
u
tp
u
t
cu
r
r
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t
f
lo
w
s
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th
e
lo
ad
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Du
r
in
g
n
o
n
s
h
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o
t
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t
h
r
o
u
g
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ze
r
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s
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e
s
w
itc
h
es S
x
≠
Sx
’
,
x
=
A
,
B
,
o
r
C
; D
=
ON.
=
2
⁄
−
=
2
=
=
0
(
3
)
=
+
=
0
≠
0
(
4
)
2
.
3
.
Sh
o
o
t
-
t
hro
ug
h z
er
o
s
t
a
t
e
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o
o
t
th
r
o
u
g
h
ze
r
o
s
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o
s
s
ib
le
b
y
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e
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e
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er
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t
w
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.
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t
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r
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s
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o
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ch
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h
ase
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h
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to
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o
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e.
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h
e
f
r
o
n
t
-
en
d
d
io
d
e
D
is
r
ev
er
s
e
b
iased
.
T
h
e
in
v
er
ter
i
s
v
ie
w
ed
as
a
s
h
o
r
t
cir
c
u
it
f
r
o
m
its
DC
lin
k
.
T
h
er
e
is
n
o
v
o
ltag
e
ac
r
o
s
s
t
h
e
lo
ad
b
u
t
t
h
e
ca
p
ac
ito
r
v
o
ltag
e
is
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o
o
s
ted
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ased
o
n
th
e
s
h
o
o
t
th
r
o
u
g
h
d
u
t
y
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atio
.
(
T
h
e
s
w
itch
e
s
S
x
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=
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r
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r
ti
m
e
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n
ter
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al
(
T
0
)
=
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2
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0
=
=
−
2
(
5
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=
−
=
−
=
0
(
6
)
Av
er
ag
i
n
g
o
f
v
o
ltag
e
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r
o
s
s
th
e
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n
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cto
r
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er
a
s
w
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h
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e
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s
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e,
is
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e
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t v
o
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7
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2
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8
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2
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2
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1
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2
0
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(
2
)
(
9
)
I
n
th
e
ab
o
v
e
eq
u
atio
n
s
T
0
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T
r
e
f
er
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th
e
s
h
o
o
t
-
th
r
o
u
g
h
d
u
t
y
r
at
io
(
T
0
/
T
˂
0
.
5
)
p
er
s
w
itc
h
i
n
g
p
er
io
d
.
M
r
ep
r
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ts
t
h
e
m
o
d
u
latio
n
i
n
d
ex
a
n
d
B
i
s
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h
e
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o
o
s
t
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ac
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T
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.
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h
e
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o
o
s
t
f
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cto
r
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o
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e
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e
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h
e
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ce
o
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s
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o
o
t
-
th
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u
g
h
s
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s
in
t
h
e
s
w
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h
i
n
g
s
eq
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e
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ce
o
f
th
e
t
h
r
ee
p
h
ase
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v
er
ter
s
w
itc
h
es.
Fig
u
r
e
2
(
a)
.
E
q
u
iv
alen
t c
ir
c
u
it
o
f
t
w
o
-
le
v
el
E
Z
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s
o
u
r
ce
in
v
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ter
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h
e
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in
s
h
o
o
t
-
th
r
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g
h
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tate
Fig
u
r
e
2
(
b
)
.
E
q
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iv
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t c
ir
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it
o
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o
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el
E
Z
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ce
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o
n
s
h
o
o
t
-
th
r
o
u
g
h
s
tate
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
694
IJ
PEDS
Vo
l.
7
,
No
.
4
,
Dec
em
b
er
2
0
1
6
:
1
2
4
0
–
1
2
5
1
1243
3.
SI
NU
SO
I
DA
L
P
UL
SE
W
I
D
T
H
M
O
DULAT
I
O
N
Ma
n
y
m
o
d
u
latio
n
tech
n
iq
u
e
s
h
av
e
b
ee
n
d
ev
e
lo
p
ed
an
d
ap
p
lied
to
Z
SI
an
d
th
e
s
a
m
e
ca
n
b
e
ap
p
lie
d
to
E
Z
SI
also
.
I
n
tr
ad
itio
n
al
s
i
n
e
P
W
M,
th
r
ee
p
h
ase
s
in
u
s
o
i
d
al
r
ef
er
en
ce
s
i
g
n
al
w
it
h
1
2
0
d
eg
r
ee
p
h
ase
s
h
i
f
t
i
s
co
m
p
ar
ed
w
ith
t
h
e
tr
ian
g
u
la
r
ca
r
r
ier
s
ig
n
al
to
g
e
n
er
ate
t
h
e
g
ati
n
g
s
i
g
n
al
s
.
W
h
en
t
h
e
m
a
g
n
it
u
d
e
o
f
th
e
r
ef
er
en
ce
s
ig
n
al
is
g
r
ea
ter
t
h
a
n
t
h
e
ca
r
r
ier
s
i
g
n
al,
t
h
e
u
p
p
er
p
o
w
er
s
w
i
tch
i
n
t
h
e
r
esp
ec
ti
v
e
p
h
a
s
e
i
s
ON,
th
e
r
ef
er
en
ce
s
i
g
n
al
is
le
s
s
er
th
a
n
th
e
ca
r
r
ier
s
ig
n
al,
an
d
th
e
p
o
w
er
s
w
i
tch
i
s
OFF.
T
h
e
co
m
p
le
m
en
t
s
i
g
n
al
s
ar
e
g
iv
e
n
to
t
h
e
lo
w
er
s
w
itc
h
o
f
t
h
e
s
a
m
e
p
h
ase
[
9
]
.
T
h
is
is
t
h
e
m
a
x
i
m
u
m
b
o
o
s
t
co
n
tr
o
l
m
e
th
o
d
o
f
s
i
n
e
P
W
M
co
n
tr
o
lled
E
Z
SI.
I
n
th
is
m
et
h
o
d
all
th
e
tr
ad
itio
n
al
n
o
n
-
s
h
o
o
t
th
r
o
u
g
h
ze
r
o
s
tates
tu
r
n
ed
in
to
s
h
o
o
t
-
th
r
o
u
g
h
ze
r
o
s
tates
w
i
th
s
i
x
ac
ti
v
e
s
tat
e
s
r
e
m
ai
n
s
u
n
c
h
an
g
ed
.
T
h
e
s
witch
i
n
g
s
eq
u
en
ce
f
o
r
VSI
is
d
e
r
iv
ed
f
ir
s
t,
t
h
en
th
e
s
h
o
o
t
th
r
o
u
g
h
s
tates
ar
e
allo
ca
ted
w
it
h
i
n
t
h
e
n
o
n
-
s
h
o
o
t
th
r
o
u
g
h
ze
r
o
s
tate
s
w
it
h
o
u
t
d
is
tu
r
b
i
n
g
th
e
ac
t
iv
e
s
tates.
F
ig
u
r
e
3
,
s
h
o
w
s
t
h
e
s
w
itc
h
i
n
g
p
u
l
s
es
alo
n
g
w
it
h
s
h
o
o
t
-
t
h
r
o
u
g
h
z
er
o
s
ta
tes.
As
all
th
e
n
o
n
-
s
h
o
o
t
th
r
o
u
g
h
ze
r
o
s
tates
ar
e
t
u
r
n
e
d
in
to
s
h
o
o
t
-
t
h
r
o
u
g
h
ze
r
o
s
tates
m
a
x
i
m
u
m
s
h
o
o
t
-
th
r
o
u
g
h
ti
m
e
T
0
an
d
b
o
o
s
t
f
ac
to
r
B
ar
e
o
b
tain
ed
f
o
r
an
y
g
iv
e
n
m
o
d
u
latio
n
i
n
d
ex
M.
T
h
e
m
a
x
i
m
u
m
b
o
o
s
t
co
n
tr
o
l
m
eth
o
d
in
tr
o
d
u
ce
s
a
lo
w
f
r
eq
u
en
c
y
cu
r
r
e
n
t
r
ip
p
le
in
in
d
u
cto
r
cu
r
r
en
t
an
d
ca
p
ac
ito
r
v
o
ltag
e
[
8
]
.
I
n
th
is
m
et
h
o
d
s
h
o
o
t
-
th
r
o
u
g
h
ze
r
o
s
tate
r
ep
ea
ts
p
er
io
d
ically
in
e
v
er
y
n
/3
d
eg
r
ee
s
,
w
it
h
th
e
as
s
u
m
p
tio
n
s
th
at
s
w
i
tch
i
n
g
f
r
eq
u
e
n
c
y
i
s
m
u
ch
h
ig
h
er
th
an
t
h
e
m
o
d
u
latio
n
f
r
eq
u
en
c
y
,
t
h
e
a
v
er
ag
e
d
u
t
y
r
atio
o
v
er
o
n
e
s
w
itc
h
in
g
c
y
cle
ca
n
b
e
ex
p
r
ess
ed
i
n
[
8
]
as
f
o
llo
w
s
,
0
=
2
−
3
√
3
π
2
(
1
0
)
T
h
e
B
o
o
s
t f
ac
to
r
is
g
i
v
en
b
y
B
=
1
1
−
2
D
0
=
1
1
−
2
T
0
T
(
1
1
)
T
h
e
r
elatio
n
s
h
ip
o
f
m
o
d
u
latio
n
in
d
e
x
an
d
g
ai
n
,
M
=
π
G
3
√
3
G
−
π
(
1
2
)
T
h
en
,
B
=
3
√
3
G
−
π
π
(
1
3
)
T
h
e
v
o
ltag
e
s
tr
es
s
o
n
t
h
e
s
w
it
ch
is
,
V
S
=
B
∗
V
dc
=
3
√
3
G
−
π
π
V
dc
=
π
3
√
3
G
−
π
V
dc
(
1
4
)
4.
SPAC
E
V
E
C
T
O
R
M
O
DULAT
I
O
N
(
SVM
)
SVP
W
M
is
an
ad
v
an
ce
co
m
p
u
tatio
n
i
n
te
n
s
i
v
e
P
W
M
m
e
th
o
d
m
o
s
t
s
u
i
tab
le
m
o
d
u
latio
n
te
ch
n
iq
u
e
f
o
r
v
ar
iab
le
-
f
r
eq
u
e
n
c
y
d
r
i
v
e
s
y
s
t
e
m
.
SVP
W
M
tech
n
iq
u
e
p
r
o
v
id
es
h
i
g
h
er
i
n
v
er
ter
o
u
tp
u
t
v
o
ltag
e
to
th
e
m
o
to
r
w
it
h
lo
w
er
h
ar
m
o
n
ic
d
i
s
to
r
ti
o
n
.
SVP
W
M
is
a
d
i
f
f
er
en
t
a
p
p
r
o
ac
h
f
r
o
m
P
W
M
m
o
d
u
lat
io
n
b
ased
o
n
s
p
ac
e
v
ec
to
r
r
ep
r
esen
tatio
n
o
f
t
h
e
v
o
ltag
e
i
n
t
h
e
α
-
β p
la
n
e.
Sp
ac
e
v
ec
to
r
co
n
ce
p
t d
er
iv
ed
f
r
o
m
t
h
e
r
o
tatin
g
m
a
g
n
etic
f
ield
o
f
t
h
e
in
d
u
ctio
n
m
o
to
r
i
s
u
s
ed
to
m
o
d
u
late
th
e
i
n
v
er
ter
o
u
tp
u
t
v
o
ltag
e.
I
n
SVP
W
M
t
ec
h
n
iq
u
e
t
h
e
th
r
ee
p
h
ase
q
u
an
t
ities
ca
n
b
e
tr
an
s
f
o
r
m
ed
in
to
th
e
ir
eq
u
iv
ale
n
t
t
wo
-
p
h
ase
q
u
a
n
tit
y
e
ith
er
in
s
y
n
ch
r
o
n
o
u
s
l
y
r
o
tatin
g
f
r
a
m
e
s
o
r
s
tatio
n
ar
y
f
r
a
m
e.
T
h
e
v
o
ltag
e
v
ec
to
r
is
u
s
ed
as
t
h
e
r
e
f
er
en
ce
v
ec
to
r
;
t
h
i
s
g
i
v
es
th
e
ad
v
a
n
tag
e
o
f
a
b
etter
o
v
er
v
ie
w
o
f
t
h
e
s
y
s
te
m
[
1
0
]
.
I
n
th
is
p
r
o
p
o
s
ed
SVP
W
M
tech
n
iq
u
e,
s
w
itc
h
i
n
g
s
eq
u
en
ce
f
o
r
VSI
u
s
in
g
SVP
W
M
h
av
e
b
ee
n
g
e
n
er
ate
d
an
d
t
h
en
s
h
o
o
t
t
h
r
o
u
g
h
s
tat
es
ca
n
b
e
all
o
ca
ted
w
i
th
in
th
e
n
o
n
-
s
h
o
o
t
t
h
r
o
u
g
h
ze
r
o
s
tates
w
ith
o
u
t a
lter
i
n
g
t
h
e
ac
tiv
e
s
tate
o
f
th
e
s
w
itc
h
in
g
s
eq
u
en
ce
.
T
h
e
th
r
ee
p
h
a
s
e
P
W
M
VSI
is
s
h
o
w
n
in
Fi
g
u
r
e
4
,
I
n
t
r
ad
itio
n
al
VSI
th
e
s
w
i
tch
in
g
v
ar
iab
les
a
,
a’
,
b
,
b
’
,
c
an
d
c’
co
n
tr
o
ls
t
h
e
s
w
i
tch
i
n
g
o
f
t
h
e
p
o
w
er
s
w
i
tch
es
S
1
to
S
6
.
W
h
e
n
th
e
u
p
p
er
s
w
i
tch
i
s
ON
i.e
a,
b
o
r
c
is
1
,
th
e
co
r
r
esp
o
n
d
in
g
lo
w
er
s
w
itc
h
is
s
w
i
tch
ed
O
FF
i.e
a’
,
b
’
,
c’
is
ze
r
o
.
T
h
er
ef
o
r
e
ON
an
d
OFF
s
tates
o
f
th
e
u
p
p
er
s
w
itc
h
es
S
1
,
S
3
an
d
S
5
d
eter
m
in
e
s
t
h
e
o
u
tp
u
t
v
o
lta
g
e.
T
h
e
eig
h
t
p
o
s
s
ib
le
s
w
itc
h
i
n
g
s
tates
ar
e
r
ep
r
esen
ted
as
v
ec
to
r
s
in
S
VP
W
M,
(
V
1
to
V
6
)
ar
e
ac
tiv
e
v
ec
to
r
s
,
V
0
a
n
d
V
7
ar
e
t
w
o
ze
r
o
v
ec
to
r
s
ap
p
l
y
i
n
g
ze
r
o
v
o
ltag
e
ac
r
o
s
s
th
e
lo
ad
.
T
h
e
eig
h
t
p
o
s
s
ib
le
s
w
itch
in
g
s
tates
f
o
r
th
e
P
W
M
VSI
,
w
it
h
s
ix
ac
tiv
e
s
tate
s
a
n
d
t
w
o
ze
r
o
s
tates a
r
e
g
i
v
e
n
in
T
ab
le
1
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
SS
N:
2
0
8
8
-
8
694
C
o
mp
a
r
is
o
n
o
f S
in
e
a
n
d
S
p
a
c
e
V
ec
to
r
Mo
d
u
la
ted
E
ZS
I
fed
Th
r
ee
P
h
a
s
e
I
n
d
u
ctio
n
Mo
to
r
…
(
R
.
Ma
la
th
i
)
1244
T
h
e
r
elatio
n
s
h
ip
b
et
w
ee
n
t
h
e
s
w
i
tch
in
g
v
ar
iab
le
v
ec
t
o
r
[
a,
b
,
c
]
t
,
lin
e
-
to
-
li
n
e
o
u
tp
u
t
v
o
ltag
e
[V
ab
V
bc
V
ca
]
t
an
d
th
e
p
h
a
s
e
v
o
ltag
e
v
ec
to
r
[
V
a
V
b
V
c
]
t
a
r
e
e
x
p
r
ess
ed
.
[
v
ab
v
bc
v
ca
]
=V
d
c
[
1
−
1
0
0
1
−
1
−
1
0
1
]
[
a
b
c
]
(
1
5
)
[
v
a
v
b
v
c
]
=
1
/3
V
dc
[
2
−
1
−
1
−
1
2
−
1
−
1
−
1
2
]
[
a
b
c
]
(
1
6
)
Fig
u
r
e
3
.
Sin
P
W
M
w
it
h
s
h
o
o
t
-
t
h
r
o
u
g
h
s
ta
tes
Fig
u
r
e
4
.
T
h
r
ee
p
h
ase
Vo
ltag
e
So
u
r
ce
I
n
v
er
ter
T
ab
le
1
.
Sw
itch
in
g
v
ec
to
r
s
,
p
h
ase
v
o
lta
g
es a
n
d
o
u
tp
u
t li
n
e
to
lin
e
v
o
lta
g
e
V
o
l
t
a
g
e
V
e
c
t
o
r
s
S
w
i
t
c
h
i
n
g
v
e
c
t
o
r
s
L
i
n
e
t
o
N
e
u
t
r
a
l
V
o
l
t
a
g
e
L
i
n
e
t
o
L
i
n
e
V
o
l
t
a
g
e
A
b
c
V
a
V
b
V
c
V
ab
V
bc
V
ca
V
0
0
0
0
0
0
0
0
0
0
V
1
1
0
0
2
/
3
-
1
/
3
-
1
/
3
1
0
-
1
V
2
1
1
0
1
/
3
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
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8
694
IJ
PEDS
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7
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