I
nd
o
ne
s
ia
n J
o
urna
l o
f
E
lect
rica
l En
g
ineering
a
nd
Co
m
pu
t
er
Science
Vo
l.
3
7
,
No
.
2
,
Feb
r
u
ar
y
20
2
5
,
p
p
.
700
~
714
I
SS
N:
2
502
-
4
7
52
,
DOI
: 1
0
.
1
1
5
9
1
/ijee
cs
.v
3
7
.
i
2
.
pp
700
-
7
1
4
700
J
o
ur
na
l ho
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ep
a
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e
:
h
ttp
:
//ij
ee
cs
.
ia
esco
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e.
co
m
Desig
n of star
ting a
t
hree
phas
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in
d
uction mo
tor usi
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direct
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line,
v
a
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f
requency
d
riv
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s
o
ft
starti
ng
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a
nd a
uto
trans
former m
eth
o
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Yulia
nta
Sireg
a
r
1
,
Yo
s
ephin
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Ro
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ua
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k
t
a
v
i
a
na
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ha
a
n
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Na
bil
a
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inti
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o
ha
m
ed
2
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Dedet
Ca
nd
ra
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wa
n
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M
ul
di Yuhe
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ri
4
1
D
e
p
a
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me
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o
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e
c
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n
i
v
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si
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a
s S
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nfo
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ticle
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y:
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Ap
r
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,
2
0
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R
ev
is
ed
Sep
12
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2
0
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Acc
ep
ted
Sep
29
,
2
0
2
4
Th
e
p
ro
b
lem
with
3
-
p
h
a
se
in
d
u
c
t
io
n
m
o
to
rs
is
t
h
a
t
wh
e
n
sta
rti
n
g
t
h
e
m
o
to
r,
th
e
m
o
to
r
sta
rti
n
g
c
u
rre
n
t
c
a
n
re
a
c
h
fiv
e
to
se
v
e
n
ti
m
e
s
th
e
n
o
m
in
a
l
c
u
rre
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t.
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is
re
se
a
rc
h
c
o
m
p
a
re
s
slip
,
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tartin
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c
u
rre
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t,
b
u
s
v
o
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g
e
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a
c
c
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lera
ti
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to
rq
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e
,
m
o
to
r
to
r
q
u
e
,
e
n
e
rg
y
sa
v
in
g
s,
a
n
d
k
VA
R
fr
o
m
t
h
e
d
irec
t
o
n
-
li
n
e
(DO
L),
v
a
riab
le
fre
q
u
e
n
c
y
d
riv
e
(VFD),
s
o
ft
sta
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n
g
,
a
n
d
a
u
t
o
tr
a
n
sfo
rm
e
r
sta
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g
m
e
th
o
d
s
in
t
h
e
e
lec
tri
c
a
l
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sie
n
t
a
n
a
ly
z
e
r
p
ro
g
ra
m
(
ET
AP
)
so
ftwa
re
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is
re
se
a
rc
h
re
su
lt
s
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o
ws
t
h
a
t
t
h
e
fa
ste
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sl
ip
re
a
c
h
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s
a
ste
a
d
y
sta
te,
n
a
m
e
ly
a
t
1
1
+
se
c
o
n
d
s.
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e
lo
we
st
sta
rti
n
g
/starti
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g
c
u
rre
n
t
is
o
wn
e
d
b
y
t
h
e
VFD
m
e
th
o
d
,
n
a
m
e
ly
<
2
0
%
f
u
ll
l
o
a
d
a
m
p
s
(
F
LA
)
i
n
th
e
first
2
se
c
o
n
d
s.
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e
lo
we
st
d
e
c
re
a
se
in
b
u
s
v
o
lt
a
g
e
a
t
ste
a
d
y
sta
te
wa
s
e
x
p
e
rien
c
e
d
b
y
th
e
VFD
m
e
th
o
d
,
n
a
m
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ly
0
.
8
1
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2
%
.
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e
q
u
ic
k
e
st
a
c
c
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lera
ti
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to
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q
u
e
re
a
c
h
e
s
a
ste
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d
y
sta
te
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e
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m
e
th
o
d
,
n
a
m
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ly
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n
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+
se
c
o
n
d
s.
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e
so
ft
sta
rti
n
g
m
e
th
o
d
o
w
n
s
t
h
e
lo
we
st
sta
rti
n
g
t
o
rq
u
e
,
n
a
m
e
ly
2
0
.
7
5
%
.
Th
e
s
o
ft
sta
rti
n
g
m
e
th
o
d
h
a
s
th
e
larg
e
st
e
n
e
rg
y
sa
v
in
g
s,
n
a
m
e
ly
1
4
8
.
0
2
k
W.
Of
t
h
e
se
v
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ra
l
v
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riab
les
o
b
se
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e
d
,
t
h
e
b
e
st starti
n
g
m
e
t
h
o
d
is t
h
e
VFD
m
e
th
o
d
.
K
ey
w
o
r
d
s
:
A
u
to
tr
an
s
f
o
r
m
e
r
D
ir
ec
t o
n
-
lin
e
S
o
f
t star
tin
g
T
h
r
ee
p
h
ase
in
d
u
ctio
n
m
o
to
r
V
ar
iab
le
f
r
eq
u
e
n
cy
d
r
iv
e
T
h
is i
s
a
n
o
p
e
n
a
c
c
e
ss
a
rticle
u
n
d
e
r th
e
CC B
Y
-
SA
li
c
e
n
se
.
C
o
r
r
e
s
p
o
nd
ing
A
uth
o
r
:
Yu
lian
ta
Sire
g
ar
Dep
ar
tm
en
t o
f
E
lectr
ical
E
n
g
i
n
ee
r
in
g
,
U
n
iv
er
s
itas
Su
m
ater
a
Utar
a
No
r
th
Su
m
ater
a
Pro
v
in
ce
,
Me
d
an
,
I
n
d
o
n
esia
E
m
ail: ju
lian
ta_
s
r
g
@
u
s
u
.
ac
.
id
1.
I
NT
RO
D
UCT
I
O
N
I
n
th
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
in
d
u
s
tr
y
,
it
is
th
e
ty
p
e
o
f
m
o
to
r
th
at
is
m
o
s
t
wid
ely
u
s
ed
,
f
o
r
ex
am
p
le,
in
wo
o
d
p
r
o
ce
s
s
in
g
,
tex
tiles
,
an
d
o
th
er
in
d
u
s
tr
ies.
T
h
is
ty
p
e
o
f
m
o
to
r
is
p
r
ef
er
r
ed
b
ec
au
s
e
o
f
its
s
im
p
le
s
h
ap
e,
r
eliab
le
c
o
n
s
tr
u
ctio
n
,
ea
s
y
o
p
er
atio
n
an
d
m
ai
n
ten
an
ce
.
I
n
g
en
er
al,
m
an
y
in
d
u
s
tr
ies
u
s
e
m
o
to
r
s
with
v
ar
y
in
g
ca
p
ac
ities
f
r
o
m
s
m
all
to
lar
g
e
ac
co
r
d
in
g
to
lo
ad
r
eq
u
ir
em
e
n
ts
.
T
h
is
m
o
to
r
in
s
tallatio
n
ca
n
b
e
d
o
n
e
in
d
i
v
id
u
ally
o
r
in
g
r
o
u
p
s
.
Ho
wev
er
,
in
its
u
s
e,
th
er
e
is
an
in
itial
p
r
o
b
lem
,
n
am
ely
t
h
e
co
n
tin
u
o
u
s
s
u
r
g
e
in
s
tar
tin
g
cu
r
r
en
t
r
ec
eiv
e
d
b
y
th
e
win
d
i
n
g
o
r
r
o
to
r
o
n
a
t
h
r
ee
-
p
h
ase
in
d
u
ctio
n
m
o
t
o
r
t
h
at
will
d
am
ag
e
th
e
m
o
to
r
win
d
in
g
o
v
er
a
lo
n
g
p
e
r
io
d
.
W
h
en
an
i
n
d
u
ctio
n
m
o
to
r
is
s
tar
ted
an
d
co
n
n
ec
te
d
to
a
p
o
wer
s
y
s
tem
,
th
e
s
tar
ter
m
o
to
r
p
r
o
v
id
es
a
lo
w
-
i
m
p
ed
an
ce
p
ath
t
o
th
e
s
y
s
tem
,
th
er
eb
y
allo
win
g
a
r
elativ
ely
h
ig
h
c
u
r
r
e
n
t
f
r
o
m
th
e
p
o
wer
s
y
s
tem
to
f
lo
w
i
n
to
th
e
lo
w
-
im
p
ed
a
n
ce
p
ath
.
T
h
is
ca
u
s
es
a
s
h
ar
p
d
ec
r
ea
s
e
i
n
s
u
p
p
l
y
cu
r
r
en
t
to
o
th
er
n
ea
r
b
y
l
o
ad
s
,
wh
ich
d
ec
r
ea
s
es v
o
ltag
e
in
th
e
s
y
s
tem
[
1
]
.
T
h
e
lar
g
e
s
tar
tin
g
cu
r
r
en
t
ca
n
ca
u
s
e
a
v
o
ltag
e
d
r
o
p
an
d
d
is
r
u
p
t
th
e
o
p
e
r
atio
n
o
f
o
th
er
e
q
u
ip
m
en
t
o
n
th
e
s
am
e
n
etwo
r
k
.
L
ar
g
e
cu
r
r
en
ts
ca
n
also
p
r
o
d
u
ce
e
x
ce
s
s
iv
e
h
ea
t,
wh
ich
ca
n
d
am
ag
e
th
e
co
il
in
s
u
latio
n
an
d
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2
5
0
2
-
4
7
52
Desig
n
o
f sta
r
tin
g
a
th
r
ee
p
h
a
s
e
in
d
u
ctio
n
mo
to
r
u
s
in
g
d
ir
ec
t
on
-
lin
e
…
(
Yu
lia
n
ta
S
ir
eg
a
r
)
701
s
h
o
r
ten
th
e
m
ac
h
in
e'
s
life
[
2
]
,
[
3
]
.
I
n
d
u
ctio
n
m
o
to
r
s
p
r
o
d
u
ce
in
d
u
ctiv
e
lo
ad
s
,
wh
ich
ca
n
r
ed
u
ce
th
e
p
o
wer
q
u
ality
o
f
th
e
p
o
wer
s
y
s
tem
.
T
h
is
in
d
u
ctiv
e
lo
ad
af
f
ec
ts
th
e
p
o
wer
f
ac
to
r
an
d
p
o
wer
q
u
a
lity
.
T
h
e
g
r
ea
ter
th
e
in
d
u
ctiv
e
lo
ad
,
th
e
wo
r
s
e
th
e
p
o
wer
f
ac
to
r
o
r
q
u
ality
.
T
h
e
p
o
wer
f
ac
to
r
will
af
f
ec
t
th
e
e
co
n
o
m
y
.
T
h
er
e
f
o
r
e,
ad
d
itio
n
al
r
ea
ctiv
e
p
o
wer
is
n
ee
d
ed
to
o
v
er
co
m
e
t
h
e
in
d
u
ct
io
n
lo
ad
g
e
n
er
ated
b
y
th
e
in
d
u
ctio
n
m
o
to
r
.
T
h
is
r
ea
ctiv
e
p
o
wer
ca
n
b
e
o
b
tai
n
ed
f
r
o
m
ca
p
ac
ito
r
b
an
k
s
.
T
h
er
e
ar
e
s
ev
er
al
m
eth
o
d
s
f
o
r
s
tar
tin
g
in
d
u
ctio
n
m
o
to
r
s
,
n
am
ely
d
ir
ec
t
o
n
-
lin
e
(
DOL
)
[
4
]
,
[
5
]
,
s
tar
d
elta
(Y
-
Δ
)
[
4
]
–
[
7
]
,
v
ar
iab
le
f
r
eq
u
en
cy
d
r
i
v
e
(
VFD)
[
8
]
–
[
1
1
]
,
s
o
f
t
s
tar
t
in
g
[
1
1
]
–
[
1
3
]
,
a
n
d
au
to
-
tr
a
n
s
f
o
r
m
e
r
[
1
4
]
,
[
1
5
]
.
Me
an
wh
ile,
E
T
AP
(
elec
tr
ical
tr
an
s
ien
t
an
aly
ze
r
p
r
o
g
r
am
)
is
th
e
m
o
s
t
co
m
p
r
e
h
en
s
iv
e
s
o
lu
tio
n
f
o
r
s
im
u
latio
n
,
d
esig
n
,
an
d
an
al
y
s
is
o
f
g
en
er
atio
n
,
tr
an
s
m
is
s
io
n
,
d
is
tr
ib
u
tio
n
,
an
d
in
d
u
s
tr
ial
p
o
wer
s
y
s
tem
s
[
1
6
]
,
[
1
7
]
.
Gen
er
ally
,
two
im
p
o
r
tan
t
th
in
g
s
m
u
s
t
b
e
co
n
s
id
er
ed
wh
en
s
tar
tin
g
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
:
th
e
s
tar
tin
g
cu
r
r
en
t
tak
en
f
r
o
m
th
e
s
u
p
p
ly
lin
e
an
d
th
e
s
tar
tin
g
to
r
q
u
e.
T
h
e
o
b
jectiv
es
o
f
th
e
s
tu
d
y
is
th
e
s
tar
tin
g
cu
r
r
en
t
m
u
s
t
b
e
k
ep
t
s
m
all
to
av
o
id
o
v
er
h
ea
tin
g
th
e
in
d
u
ctio
n
m
o
to
r
an
d
ex
ce
s
s
iv
e
v
o
ltag
e
d
r
o
p
s
in
th
e
n
etwo
r
k
s
y
s
tem
.
T
h
e
s
tar
tin
g
to
r
q
u
e
s
h
o
u
ld
b
e
ab
o
u
t
5
0
%
t
o
1
0
0
%
h
ig
h
e
r
th
an
th
e
e
x
p
e
cted
lo
ad
t
o
r
q
u
e
to
en
s
u
r
e
th
at
th
e
m
o
to
r
r
u
n
s
f
air
ly
q
u
ick
ly
[
1
8
]
,
[
1
9
]
.
T
h
is
s
ec
tio
n
in
clu
d
es
s
ev
er
al
e
x
am
p
le
s
tu
d
ies
an
d
e
x
p
lain
s
t
h
e
wo
r
k
d
o
n
e
t
o
s
tar
t
d
ir
ec
tly
o
n
lin
e
[
5
]
,
[
1
6
]
,
[
1
8
]
,
[
2
0
]
.
T
h
e
p
r
e
v
io
u
s
r
esear
ch
r
eg
ar
d
in
g
in
d
u
ct
io
n
m
o
to
r
s
tar
tin
g
an
d
s
tar
t
aid
ed
d
ev
ices
[
1
7
]
co
m
p
ar
es
s
tar
tin
g
cu
r
r
en
t,
r
ed
u
ce
d
b
u
s
v
o
ltag
e
d
r
o
p
,
s
tar
tin
g
to
r
q
u
e
,
an
d
e
n
er
g
y
s
av
in
g
s
f
r
o
m
ea
ch
s
tar
tin
g
m
eth
o
d
o
f
i
n
d
u
ctio
n
m
o
to
r
.
T
h
e
in
d
u
ctio
n
m
o
to
r
s
tar
tin
g
m
eth
o
d
s
u
s
ed
in
th
is
r
esear
ch
ar
e
VFD,
ca
p
ac
ito
r
s
tar
tin
g
,
s
tar
d
elta,
an
d
au
to
-
tr
an
s
f
o
r
m
er
.
I
n
t
h
is
r
esear
ch
,
th
e
b
est
m
eth
o
d
f
o
r
r
ed
u
ci
n
g
th
e
s
tar
tin
g
cu
r
r
e
n
t
is
VFD,
an
d
th
e
b
est m
eth
o
d
f
o
r
s
av
in
g
en
er
g
y
is
a
u
to
-
tr
a
n
s
f
o
r
m
er
.
R
esear
ch
was
also
co
n
d
u
cte
d
b
y
[
5
]
;
th
is
c
o
m
p
ar
e
d
VL
-
N,
VL
-
L,
to
tal
h
ar
m
o
n
ic
d
is
to
r
ti
o
n
(
T
HD)
VL
-
N,
T
HD
VL
-
L
,
T
HD
I
,
a
n
d
th
e
s
tar
tin
g
cu
r
r
en
t
o
f
ea
c
h
in
d
u
ctio
n
m
o
to
r
s
tar
tin
g
m
e
th
o
d
.
T
h
e
in
d
u
ctio
n
m
o
to
r
s
tar
tin
g
m
eth
o
d
s
u
s
ed
in
th
is
r
esear
ch
a
r
e
DOL
,
s
tar
d
elta
,
a
n
d
VSD
Altiv
ar
6
1
.
T
h
e
r
esu
lts
o
f
th
is
r
esear
ch
,
n
am
ely
th
e
ac
q
u
is
itio
n
o
f
s
tar
tin
g
cu
r
r
en
t
f
r
o
m
th
e
th
ir
d
m
eth
o
d
,
s
h
o
w
th
at
th
e
Altiv
ar
6
1
VSD
m
eth
o
d
p
r
o
d
u
ce
s
th
e
s
m
allest
s
tar
tin
g
cu
r
r
en
t,
an
d
th
e
r
o
tatio
n
al
ac
ce
ler
atio
n
o
f
t
h
e
3
-
p
h
ase
m
o
to
r
b
ec
o
m
es
s
m
o
o
th
er
.
Pre
v
io
u
s
r
esear
ch
b
y
[
1
8
]
also
o
b
s
er
v
e
d
s
tar
tin
g
cu
r
r
en
t,
v
o
ltag
e
d
r
o
p
,
en
e
r
g
y
u
s
ed
,
an
d
in
v
estme
n
t
co
s
ts
f
r
o
m
th
e
DOL
,
s
tar
d
elta
,
au
to
-
tr
an
s
f
o
r
m
er
,
an
d
s
o
f
t star
ter
s
tar
tin
g
m
eth
o
d
s
.
T
h
e
r
esu
lts
o
f
th
is
r
esear
ch
ar
e
th
at
f
r
o
m
th
e
f
o
u
r
s
tar
tin
g
m
eth
o
d
s
,
it
was
f
o
u
n
d
t
h
at
th
e
s
m
allest
s
tar
tin
g
cu
r
r
en
t
was
o
b
tain
ed
f
r
o
m
th
e
s
tar
d
elta
m
eth
o
d
,
th
e
s
m
alle
s
t
u
s
ed
en
er
g
y
was
o
b
tain
ed
f
r
o
m
th
e
s
tar
d
elta
m
eth
o
d
,
th
e
s
m
allest
v
o
ltag
e
d
r
o
p
was
o
b
tain
ed
f
r
o
m
th
e
s
o
f
t
s
tar
ter
,
th
e
ch
ea
p
est
in
v
estme
n
t
co
s
ts
wer
e
o
b
tain
ed
f
r
o
m
th
e
DOL
m
eth
o
d
an
d
th
e
m
o
s
t e
x
p
en
s
iv
e
in
v
estme
n
t c
o
s
ts
with
th
e
So
f
t Star
ter
m
eth
o
d
.
T
h
e
o
th
e
r
p
r
ev
io
u
s
r
esear
ch
b
y
[
1
6
]
c
o
m
p
a
r
ed
t
h
e
s
tar
tin
g
c
u
r
r
en
t
an
d
s
tar
tin
g
to
r
q
u
e
f
r
o
m
th
e
a
u
to
tr
an
s
f
o
r
m
er
a
n
d
VFD
m
eth
o
d
s
.
T
h
e
r
esu
lts
o
f
th
is
r
esear
ch
ar
e
s
im
u
latio
n
s
s
h
o
win
g
th
at
th
e
VFD
m
eth
o
d
is
b
etter
th
an
th
e
au
to
-
tr
an
s
f
o
r
m
er
m
eth
o
d
.
Fu
r
th
er
m
o
r
e,
r
esea
r
ch
b
y
[
2
0
]
,
th
is
wo
r
k
ad
d
r
ess
es
a
n
o
v
el
m
eth
o
d
f
o
r
m
in
im
izin
g
th
e
in
r
u
s
h
o
f
b
eg
in
n
in
g
c
u
r
r
en
t
in
p
o
ly
p
h
as
e
in
d
u
ctio
n
m
o
to
r
s
b
y
s
tar
tin
g
th
em
with
o
u
t
th
e
n
ee
d
f
o
r
p
r
im
ar
y
v
o
lta
g
e
co
m
p
en
s
ato
r
s
.
T
h
e
cr
an
k
d
r
iv
in
g
m
ec
h
a
n
is
m
o
f
t
h
e
m
o
to
r
r
o
tates
its
r
o
to
r
at
a
r
ea
s
o
n
ab
le
s
p
ee
d
in
th
e
d
esig
n
ated
d
ir
ec
tio
n
.
T
h
e
m
o
to
r
is
th
en
g
iv
en
its
r
ated
v
o
ltag
e.
T
h
i
s
is
ex
p
lain
ed
with
th
e
h
elp
o
f
a
ca
s
e
s
tu
d
y
o
n
a
3
-
p
h
ase,
5
-
h
p
NGE
F
m
ak
e
m
o
t
o
r
,
o
s
cillo
g
r
ap
h
ic
r
e
co
r
d
in
g
s
f
r
o
m
th
e
ex
p
er
im
en
ts
,
an
d
co
m
p
ar
is
o
n
s
with
o
th
er
s
tar
tin
g
m
et
h
o
d
s
.
B
ased
o
n
th
e
p
r
o
b
lem
s
ex
p
l
ain
ed
an
d
p
r
e
v
io
u
s
r
esear
ch
b
ac
k
g
r
o
u
n
d
,
th
is
r
esear
ch
p
r
o
v
id
es
a
s
o
lu
tio
n
u
s
in
g
a
s
im
u
latio
n
an
d
an
aly
s
is
co
m
p
ar
in
g
th
e
DOL
,
VFD,
s
o
f
t
s
tar
tin
g
,
an
d
au
to
tr
an
s
f
o
r
m
e
r
s
tar
tin
g
m
eth
o
d
s
.
T
h
e
p
a
r
am
e
ter
s
co
m
p
ar
ed
f
r
o
m
th
e
f
o
u
r
s
tar
tin
g
m
eth
o
d
s
ar
e
s
tar
tin
g
c
u
r
r
en
t,
b
u
s
v
o
ltag
e,
s
tar
tin
g
to
r
q
u
e,
e
n
er
g
y
s
av
in
g
s
,
s
lip
,
ac
ce
ler
atio
n
to
r
q
u
e,
a
n
d
k
VAR.
T
h
e
r
esu
lt
o
f
th
is
r
esear
ch
is
th
at
th
e
b
est s
tar
tin
g
m
eth
o
d
is
th
e
VF
D
m
eth
o
d
.
2.
M
E
T
H
O
D
T
h
is
r
esear
ch
an
aly
ze
s
th
e
in
r
u
s
h
cu
r
r
en
t
in
s
ev
er
al
in
d
u
cti
o
n
m
o
to
r
s
tar
tin
g
m
eth
o
d
s
.
T
h
is
aim
s
to
h
elp
r
esear
ch
er
s
u
n
d
er
s
tan
d
h
o
w
to
s
o
lv
e
ex
is
tin
g
p
r
o
b
le
m
s
ac
co
r
d
in
g
to
th
e
e
x
p
ec
ted
r
esu
lts
an
d
ca
n
b
e
s
cien
tific
ally
ju
s
tifie
d
.
Me
an
wh
ile,
th
e
d
ata
f
o
r
co
n
d
u
ctin
g
th
is
r
esear
ch
was
o
b
tain
ed
f
r
o
m
PT.
I
n
d
o
n
esia
Asah
an
Alu
m
in
u
m
is
lo
ca
te
d
at
th
e
Sig
u
r
ag
u
r
a
h
y
d
r
o
elec
tr
i
c
p
o
wer
p
la
n
t
(
PLT
A)
in
Par
ito
h
an
Villag
e,
T
o
b
a
Sam
o
s
ir
R
eg
en
cy
,
No
r
th
Su
m
atr
a
Pro
v
in
ce
,
I
n
d
o
n
esia.
Nex
t,
an
aly
ze
th
e
s
tar
tin
g
cu
r
r
en
t
[
2
]
,
[
2
1
]
,
[
2
2
]
,
b
u
s
v
o
ltag
e
[
2
3
]
,
[
2
4
]
,
s
tar
tin
g
t
o
r
q
u
e
[
2
5
]
,
[
2
6
]
,
s
lip
[
2
7
]
,
[
2
8
]
,
ac
ce
ler
atio
n
to
r
q
u
e
[
2
9
]
,
an
d
k
VAR
[
3
0
]
,
[
3
1
]
f
r
o
m
ea
c
h
DOL
,
VFD,
s
o
f
t star
tin
g
,
an
d
au
to
t
r
an
s
f
o
r
m
e
r
m
e
th
o
d
,
as d
escr
ib
e
d
in
Fig
u
r
e
1
.
Gen
er
ato
r
d
ata
f
o
r
th
e
Sig
u
r
ag
u
r
a
PLT
A
at
PT.
I
n
al
u
m
is
as
s
h
o
wn
in
T
ab
le
1
.
Fu
r
th
er
m
o
r
e,
Sig
u
r
ag
u
r
a
PLT
A
h
as
f
iv
e
(
5
)
ty
p
es
o
f
tr
a
n
s
f
o
r
m
e
r
s
,
n
am
ely
m
ain
tr
an
s
f
o
r
m
er
(
MT
R
)
,
d
is
tr
ib
u
tio
n
tr
an
s
f
o
r
m
er
(
DT
)
,
s
tatio
n
tr
an
s
f
o
r
m
er
(
ST)
,
lo
ca
l
tr
an
s
f
o
r
m
er
(
L
T
)
,
an
d
h
o
u
s
in
g
tr
an
s
f
o
r
m
er
(
HT
)
,
as
s
ee
n
i
n
T
ab
les 2
to
6
r
esp
ec
tiv
ely
.
On
ly
th
e
L
T
an
d
HT
ar
e
u
s
ed
in
t
h
e
E
T
AP so
f
twar
e
in
th
e
in
d
u
ctio
n
m
o
to
r
s
tar
tin
g
s
im
u
latio
n
s
er
ies.
Me
an
wh
ile
,
Sig
u
r
ag
u
r
a
h
y
d
r
o
elec
tr
ic
p
o
wer
p
lan
t'
s
d
i
s
co
n
n
ec
tin
g
s
witch
(
DS)
o
r
PMS
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
52
In
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
,
Vo
l.
3
7
,
No
.
2
,
Feb
r
u
a
r
y
20
2
5
:
7
0
0
-
7
1
4
702
s
ep
ar
ato
r
h
as
s
p
ec
if
icatio
n
s
th
at
ca
n
b
e
s
ee
n
in
T
ab
le
7
.
Nex
t,
th
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
b
ein
g
s
im
u
lated
is
th
e
m
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lated
.
E
n
er
g
y
f
r
o
m
th
e
g
en
er
at
o
r
f
lo
ws
to
th
e
MTR
an
d
L
T
,
f
r
o
m
th
e
L
T
th
e
elec
tr
ical
en
er
g
y
is
s
en
t
to
t
h
e
HT
to
r
ed
u
ce
th
e
v
o
ltag
e
to
3
8
0
V,
th
e
ele
ctr
ical
en
er
g
y
f
r
o
m
th
e
HT
is
u
s
ed
f
o
r
d
is
tr
ib
u
ti
o
n
elec
tr
ici
ty
to
m
ee
t
ex
is
tin
g
elec
tr
icity
n
ee
d
s
at
th
e
u
n
d
e
r
g
r
o
u
n
d
S
ig
u
r
ag
u
r
a
p
o
wer
s
tatio
n
,
MCC
(
m
o
to
r
co
n
t
r
o
l
ce
n
ter
)
as
well
as
ex
is
tin
g
s
y
n
ch
r
o
n
o
u
s
g
en
er
at
o
r
s
.
I
n
th
is
SLD,
th
e
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
s
ec
tio
n
th
at
is
s
im
u
lated
is
in
th
e
c
o
m
m
o
n
MCC
s
ec
tio
n
.
T
h
is
r
esear
ch
u
s
es
a
o
n
e
-
lin
e
d
iag
r
am
d
esig
n
f
o
r
s
tar
tin
g
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
to
a
n
aly
ze
all
o
b
s
er
v
ed
v
a
r
iab
les.
I
n
th
is
d
e
s
ig
n
,
th
er
e
is
o
n
e
g
en
er
ato
r
,
4
L
T
,
4
HT
,
1
3
b
u
s
es,
1
6
C
B
,
1
VFD,
an
d
f
o
u
r
in
d
u
ctio
n
m
o
to
r
s
with
th
e
s
am
e
s
p
ec
if
icatio
n
s
b
u
t
d
i
f
f
er
en
t
m
eth
o
d
s
.
T
o
m
ax
im
ize
s
im
u
latio
n
an
d
an
aly
s
is
,
ea
ch
in
d
u
ctio
n
m
o
to
r
is
g
i
v
en
th
e
s
am
e
tr
an
s
f
o
r
m
er
s
p
ec
if
i
ca
tio
n
s
an
d
ca
b
les
to
d
is
tr
ib
u
t
e
th
e
elec
tr
ic
f
lo
w
ev
en
ly
.
T
h
e
f
o
llo
win
g
is
th
e
o
n
e
-
lin
e
d
ia
g
r
am
d
esig
n
f
o
r
s
tar
tin
g
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
in
Fig
u
r
e
3
.
I
n
Fig
u
r
e
3
,
ea
ch
in
d
u
ctio
n
m
o
t
o
r
h
as
th
e
s
am
e
n
am
ep
late
s
p
ec
if
icatio
n
s
b
u
t
a
d
if
f
er
e
n
t
s
tar
tin
g
m
eth
o
d
.
T
h
e
d
escr
ip
tio
n
o
f
ea
ch
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
ca
n
b
e
s
ee
n
i
n
T
ab
le
9
.
3.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
3
.
1
.
Co
m
pa
riso
n o
f
s
lip
s
f
o
r
ea
ch
m
et
ho
d
As
s
h
o
wn
in
Fig
u
r
e
4
,
th
e
VF
D
m
eth
o
d
ex
p
er
ien
ce
d
t
h
e
m
o
s
t
ex
tr
em
e
an
d
co
n
s
tan
t
d
ec
r
e
ase
in
s
lip
o
f
th
e
f
o
u
r
o
th
e
r
m
et
h
o
d
s
.
T
h
e
VFD
m
eth
o
d
r
ea
c
h
es
a
s
tead
y
s
tate
q
u
ick
ly
co
m
p
ar
ed
to
o
th
er
m
eth
o
d
s
.
T
h
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
d
ec
r
ea
s
es
s
lip
s
lo
wly
;
in
o
th
er
wo
r
d
s
,
th
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
r
ed
u
ce
s
s
lip
m
o
r
e
s
m
o
o
th
ly
s
o
th
at
th
e
m
o
to
r
b
i
k
e
d
o
es
n
o
t
ex
p
er
ien
ce
s
h
o
c
k
.
T
h
e
f
o
llo
win
g
s
lip
co
m
p
ar
i
s
o
n
g
r
ap
h
d
ata
f
o
r
ea
ch
m
eth
o
d
c
an
b
e
s
ee
n
in
T
ab
le
1
0
.
DOL
,
th
e
in
itial
s
lip
is
1
0
0
%
a
n
d
is
r
ed
u
ce
d
s
lo
wly
.
T
h
e
m
ag
n
etic
f
ield
s
p
ee
d
(
s
y
n
ch
r
o
n
o
u
s
s
p
ee
d
)
in
itially
h
as
a
v
er
y
h
ig
h
v
alu
e,
wh
ile
th
e
r
o
to
r
s
p
ee
d
is
in
itially
s
tatio
n
ar
y
,
s
o
in
th
e
f
ir
s
t
s
ec
o
n
d
,
th
e
s
lip
v
alu
e
is
1
0
0
%.
As
tim
e
p
ass
es,
th
e
r
o
to
r
m
o
v
es
to
ca
tch
u
p
with
th
e
m
ag
n
etic
f
ield
s
p
ee
d
,
s
o
th
e
s
lip
v
alu
e
is
5
3
s
ec
o
n
d
s
(
s
tead
y
s
tate
co
n
d
itio
n
)
,
wo
r
t
h
0
.
9
9
5
7
4
8
%.
VFD,
s
ec
o
n
d
s
0
to
1
s
lip
h
as
a
v
alu
e
o
f
1
0
0
%
an
d
d
r
o
p
s
d
r
asti
ca
lly
u
n
til
th
e
1
1
th
-
s
ec
o
n
d
s
tead
y
-
s
tate
co
n
d
itio
n
s
.
T
h
e
s
lip
v
alu
e
is
0
.
0
3
0
1
6
1
%.
Acc
o
r
d
i
n
g
to
th
e
wo
r
k
in
g
p
r
in
ci
p
le
o
f
th
e
VFD
,
th
e
s
lip
v
al
u
e
d
r
o
p
s
s
o
q
u
ick
ly
an
d
co
n
s
is
ten
tly
th
at
th
e
m
o
to
r
s
p
ee
d
ca
n
b
e
co
n
s
tan
t.
So
f
t
s
tar
tin
g
,
th
e
in
itial
s
lip
is
1
0
0
%
an
d
lo
wer
e
d
s
lo
wly
.
As
tim
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2
5
0
2
-
4
7
52
Desig
n
o
f sta
r
tin
g
a
th
r
ee
p
h
a
s
e
in
d
u
ctio
n
mo
to
r
u
s
in
g
d
ir
ec
t
on
-
lin
e
…
(
Yu
lia
n
ta
S
ir
eg
a
r
)
705
p
ass
es,
th
e
r
o
to
r
m
o
v
es
to
ca
t
ch
u
p
with
t
h
e
s
p
ee
d
o
f
th
e
m
ag
n
etic
f
ield
s
o
th
at
it
r
ea
c
h
es
a
s
tead
y
s
tate
at
t
h
e
58
th
+
s
ec
o
n
d
,
wh
ich
h
as
a
s
li
p
v
alu
e
o
f
0
.
9
9
5
7
3
8
%.
Au
to
t
r
an
s
f
o
r
m
er
,
th
e
in
itial
s
lip
is
1
0
0
%
an
d
lo
wer
ed
s
lo
wly
.
As
tim
e
p
a
s
s
es,
th
e
r
o
to
r
m
o
v
es
to
ca
tch
u
p
with
t
h
e
s
p
ee
d
o
f
th
e
m
ag
n
etic
f
iel
d
u
n
til
it
r
ea
ch
es
a
s
tead
y
s
tate
at
th
e
5
4
th
+
s
ec
o
n
d
,
wh
ich
h
as
a
s
lip
v
al
u
e
o
f
0
.
9
9
5
7
3
8
%.
T
h
e
r
esear
c
h
r
esu
lt
s
f
r
o
m
s
lip
s
f
o
r
all
m
eth
o
d
s
ar
e
f
o
llo
win
g
p
r
ev
io
u
s
r
esear
ch
[
1
6
]
,
[
1
7
]
.
Fig
u
r
e
2
.
SLD
o
f
S
ig
u
r
ag
u
r
a
p
o
wer
s
tatio
n
Fig
u
r
e
3
.
On
e
lin
e
d
iag
r
am
d
e
s
ig
n
f
o
r
s
tar
tin
g
a
3
-
p
h
ase
in
d
u
ctio
n
m
o
t
o
r
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
52
In
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
,
Vo
l.
3
7
,
No
.
2
,
Feb
r
u
a
r
y
20
2
5
:
7
0
0
-
7
1
4
706
T
ab
le
9
.
Descr
ip
tio
n
o
f
ea
c
h
3
-
p
h
ase
in
d
u
ctio
n
m
o
to
r
in
t
h
e
cir
cu
it
M
o
t
o
r
n
a
me
S
t
a
r
t
i
n
g
m
e
t
h
o
d
DOL
M
o
t
o
r
1
V
F
D
M
o
t
o
r
2
S
o
f
t
s
t
a
r
t
i
n
g
M
o
t
o
r
3
A
u
t
o
t
r
a
n
sf
o
r
mer
M
o
t
o
r
4
Fig
u
r
e
4
.
Sli
p
f
o
r
e
ac
h
m
eth
o
d
T
ab
le
10
.
R
esu
lts
f
r
o
m
c
o
m
p
a
r
is
o
n
o
f
s
lip
s
f
o
r
ea
ch
m
eth
o
d
Ti
me
i
n
t
e
r
v
a
l
(
sec
o
n
d
s)
S
l
i
p
(
%)
DOL
V
F
D
S
o
f
t
s
t
a
r
t
i
n
g
A
u
t
o
t
r
a
n
sf
o
r
mer
0
1
0
0
1
0
0
1
0
0
1
0
0
20
46
0
.
0
3
5
7
.
9
3
4
8
.
6
6
40
2
1
.
7
0
0
.
0
3
2
7
.
6
3
2
3
.
2
1
60
0
.
9
9
0
.
0
3
0
.
9
9
0
.
9
9
80
0
.
9
9
0
.
0
3
0
.
9
9
0
,
9
9
1
0
0
0
.
9
9
0
.
0
3
0
.
9
9
0
.
9
9
3.
2
.
Co
m
pa
riso
n o
f
s
t
a
r
t
ing
curr
ent
f
o
r
ea
ch
m
e
t
ho
d
As
ca
n
b
e
s
ee
n
in
Fig
u
r
e
5
,
t
h
e
lar
g
est
s
tar
tin
g
cu
r
r
en
t
is
e
x
p
er
ien
ce
d
b
y
th
e
DOL
m
et
h
o
d
,
n
am
el
y
>5
0
0
%
f
u
ll
lo
a
d
am
p
s
(
FLA
)
,
an
d
th
e
s
m
allest
s
tar
tin
g
cu
r
r
en
t
is
ex
p
er
ien
ce
d
b
y
th
e
VF
D
m
eth
o
d
,
n
am
ely
<2
0
%
FLA.
I
n
th
e
s
o
f
t
s
tar
tin
g
m
et
h
o
d
,
th
e
s
tar
tin
g
c
u
r
r
e
n
t
in
t
h
e
1
st
s
ec
o
n
d
is
3
0
0
%
o
f
th
e
FLA
an
d
is
in
cr
ea
s
ed
g
r
ad
u
ally
.
I
n
th
e
au
to
tr
an
s
f
o
r
m
er
m
eth
o
d
,
th
e
s
tar
tin
g
cu
r
r
e
n
t
in
th
e
1
s
t
s
ec
o
n
d
is
1
5
7
.
7
6
%
o
f
th
e
FLA;
in
th
e
n
ex
t
s
ec
o
n
d
,
it
i
n
cr
ea
s
es
s
lo
wly
.
Fo
r
a
s
o
lu
ti
o
n
to
o
v
er
c
o
m
e
lar
g
e
s
tar
tin
g
cu
r
r
en
ts
,
th
e
DOL
m
eth
o
d
is
n
o
t
s
u
itab
le.
T
h
e
s
o
lu
tio
n
to
th
is
p
r
o
b
lem
is
to
u
s
e
th
e
VFD
m
eth
o
d
.
T
h
e
f
o
llo
win
g
g
r
ap
h
d
ata
co
m
p
ar
es e
ac
h
m
eth
o
d
'
s
s
tar
ti
n
g
/s
tar
tin
g
cu
r
r
en
t,
as seen
in
T
ab
le
1
1
.
Star
tin
g
cu
r
r
en
t
in
DOL
,
t
h
e
cu
r
r
e
n
t
s
p
ik
e
in
t
h
e
DOL
m
eth
o
d
is
v
er
y
lar
g
e
in
th
e
1
st
s
ec
o
n
d
,
r
ea
ch
in
g
5
6
3
%
o
f
th
e
n
o
m
in
al
cu
r
r
en
t.
T
h
is
ca
n
ca
u
s
e
th
e
m
o
to
r
to
o
v
e
r
h
ea
t,
lead
in
g
to
p
o
ten
tial
d
am
ag
e
an
d
th
e
ca
b
le
to
b
u
r
n
d
u
e
to
d
a
m
ag
e
to
t
h
e
co
il
in
s
u
latio
n
.
T
h
e
p
r
o
lo
n
g
ed
h
ig
h
s
tar
tin
g
cu
r
r
en
t
i
n
th
e
DOL
m
eth
o
d
,
d
r
o
p
p
in
g
to
3
5
0
%
o
f
th
e
n
o
m
in
al
cu
r
r
en
t
o
n
ly
at
t
h
e
4
5
th
s
ec
o
n
d
,
u
n
d
er
s
co
r
es
th
e
n
ee
d
f
o
r
ca
u
tio
n
.
I
n
th
e
DOL
m
eth
o
d
,
th
e
m
o
t
o
r
is
s
tead
y
f
r
o
m
th
e
5
3
rd
s
ec
o
n
d
+
at
9
4
.
1
2
%
o
f
its
n
o
m
in
al
c
u
r
r
en
t.
Me
an
w
h
ile,
in
th
e
VFD
m
eth
o
d
,
th
e
s
u
r
g
e
cu
r
r
en
t
in
th
e
VFD
m
eth
o
d
i
n
th
e
1
s
t
s
ec
o
n
d
is
s
till
0
%
o
f
th
e
FLA;
in
th
e
2
nd
s
ec
o
n
d
,
th
e
s
tar
tin
g
cu
r
r
en
t
is
1
9
.
8
3
%.
T
h
e
lar
g
est
s
tar
tin
g
cu
r
r
en
t
is
at
th
e
1
1
th
s
ec
o
n
d
,
w
o
r
th
2
5
2
.
2
%
o
f
th
e
n
o
m
in
al
c
u
r
r
en
t.
W
ith
its
s
ig
n
if
ican
tly
lo
wer
s
tar
tin
g
cu
r
r
en
t
co
m
p
a
r
ed
to
th
e
DOL
m
eth
o
d
,
th
e
VFD
m
eth
o
d
is
a
r
ea
s
s
u
r
in
g
ch
o
ice
f
o
r
m
a
n
ag
in
g
h
ig
h
s
tar
tin
g
cu
r
r
en
ts
.
I
n
th
e
VFD
m
eth
o
d
,
th
e
m
o
t
o
r
r
ea
c
h
es
a
s
tead
y
s
tate
f
r
o
m
t
h
e
1
1
th
s
ec
o
n
d
+
at
8
6
.
5
%
o
f
its
n
o
m
in
al
c
u
r
r
en
t.
Fu
r
th
e
r
m
o
r
e
,
in
th
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
,
a
cu
r
r
en
t
s
u
r
g
e
o
cc
u
r
s
in
th
e
1
st
s
ec
o
n
d
,
3
0
0
%
o
f
th
e
FLA;
i
n
th
e
5
th
s
ec
o
n
d
,
th
e
s
tar
tin
g
cu
r
r
en
t
i
n
cr
ea
s
es
to
3
5
0
%.
T
h
e
s
tar
tin
g
cu
r
r
en
t
in
th
is
m
eth
o
d
in
cr
ea
s
es
s
lo
wly
.
T
h
e
lar
g
est
s
tar
tin
g
cu
r
r
en
t
is
in
th
e
1
2
th
s
ec
o
n
d
,
5
0
2
.
5
%
o
f
th
e
n
o
m
i
n
al
cu
r
r
e
n
t.
T
h
e
s
tar
tin
g
c
u
r
r
e
n
t
is
b
e
tter
th
an
th
e
DOL
m
eth
o
d
f
o
r
th
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
b
u
t
n
o
t
b
etter
t
h
an
th
e
VFD
m
eth
o
d
.
I
n
th
e
s
o
f
t
s
t
ar
tin
g
m
eth
o
d
,
th
e
m
o
to
r
is
s
tead
y
f
r
o
m
th
e
5
9
th
s
ec
o
n
d
+
at
9
4
.
1
2
%
o
f
its
n
o
m
in
al
cu
r
r
en
t.
Me
an
wh
ile,
th
e
au
to
tr
an
s
f
o
r
m
er
m
eth
o
d
ex
p
er
ien
ce
d
a
c
u
r
r
en
t
s
p
ik
e
in
th
e
au
to
tr
a
n
s
f
o
r
m
e
r
m
eth
o
d
in
t
h
e
1
st
s
ec
o
n
d
,
am
o
u
n
tin
g
to
1
5
7
.
7
6
%
o
f
th
e
FL
A;
in
th
e
4
th
s
ec
o
n
d
,
th
e
s
tar
tin
g
cu
r
r
en
t
in
cr
ea
s
ed
to
5
4
5
.
2
6
%
o
f
th
e
FLA.
T
h
e
lar
g
est
s
tar
tin
g
cu
r
r
en
t
is
in
th
e
4
th
s
ec
o
n
d
,
5
4
5
.
2
6
%
o
f
th
e
n
o
m
in
al
cu
r
r
e
n
t.
T
h
e
s
tar
tin
g
cu
r
r
en
t
is
b
etter
th
an
th
e
DOL
m
eth
o
d
f
o
r
t
h
e
au
to
tr
an
s
f
o
r
m
er
m
eth
o
d
b
u
t
n
o
t
b
etter
th
a
n
th
e
VFD
an
d
s
o
f
t
s
tar
tin
g
m
eth
o
d
s
.
I
n
t
h
e
au
to
t
r
an
s
f
o
r
m
er
m
eth
o
d
,
t
h
e
m
o
to
r
r
ea
ch
es a
s
tead
y
s
tate
f
r
o
m
t
h
e
5
5
th
s
ec
o
n
d
+
at
9
4
.
1
2
% o
f
its
n
o
m
in
al
c
u
r
r
en
t.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
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&
C
o
m
p
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5
0
2
-
4
7
52
Desig
n
o
f sta
r
tin
g
a
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r
ee
p
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e
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d
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ctio
n
mo
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S
ir
eg
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r
)
707
Fig
u
r
e
5
.
Mo
t
o
r
s
tar
tin
g
c
u
r
r
e
n
t f
o
r
ea
c
h
m
eth
o
d
T
ab
le
11
.
C
o
m
p
ar
is
o
n
r
esu
lts
o
f
s
tar
tin
g
cu
r
r
en
t f
o
r
ea
ch
m
e
th
o
d
Ti
me
i
n
t
e
r
v
a
l
(
sec
o
n
d
s)
C
u
r
r
e
n
t
l
i
n
e
(
%
F
LA
)
DOL
V
F
D
S
o
f
t
s
t
a
r
t
i
n
g
A
u
t
o
t
r
a
n
sf
o
r
mer
1
5
6
3
0
3
0
0
1
5
7
.
7
6
2
5
5
1
.
5
0
1
9
.
8
3
3
0
0
2
5
7
.
6
3
3
5
4
0
.
3
8
3
6
.
2
2
3
0
0
3
7
2
.
9
5
4
5
2
9
.
3
8
5
3
.
8
1
3
0
0
5
4
5
.
2
6
5
5
1
9
.
0
2
7
3
.
5
7
3
5
0
5
3
4
.
2
2
6
5
0
9
.
1
8
9
6
.
1
2
3
7
5
5
2
3
.
6
4
7
4
9
9
.
9
0
1
2
1
.
8
3
4
0
0
5
1
3
.
5
6
8
4
9
1
.
1
7
1
5
0
.
7
4
4
2
5
5
0
4
.
0
1
9
4
8
2
.
9
9
1
8
2
.
5
6
4
5
0
4
9
5
.
0
3
10
4
7
5
.
3
7
2
1
6
.
7
0
4
8
0
4
8
6
.
6
1
3.
3
.
Co
m
pa
riso
n o
f
bu
s
v
o
lt
a
g
e
f
o
r
ea
ch
m
e
t
ho
d
As
ca
n
b
e
s
ee
n
in
Fig
u
r
e
6
,
at
th
e
0
th
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
g
iv
en
to
ea
ch
m
eth
o
d
is
1
0
0
%.
I
n
th
e
1
st
s
ec
o
n
d
,
th
e
lar
g
est
b
u
s
v
o
ltag
e
d
r
o
p
was
ex
p
er
ie
n
ce
d
b
y
th
e
DOL
m
et
h
o
d
,
n
am
el
y
1
4
.
2
9
%,
an
d
th
e
s
m
allest
b
u
s
v
o
ltag
e
d
r
o
p
b
y
th
e
VFD
m
eth
o
d
was
0
%.
Fr
o
m
th
e
0
th
to
th
e
1
0
0
th
s
ec
o
n
d
,
th
e
h
ig
h
est
b
u
s
v
o
ltag
e
d
r
o
p
was
ex
p
er
ien
ce
d
b
y
th
e
DOL
m
eth
o
d
at
1
4
.
2
9
%,
s
o
th
e
b
u
s
v
o
ltag
e
v
alu
e
was
8
5
.
7
1
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
lta
g
e
at
th
e
1
st
+
s
ec
o
n
d
,
t
h
e
lo
west
b
u
s
v
o
lt
ag
e
d
r
o
p
was
ex
p
er
ien
ce
d
b
y
th
e
VFD
is
4
.
4
%
s
o
th
at
th
e
b
u
s
v
o
ltag
e
v
alu
e
is
9
5
.
6
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e
at
th
e
1
0
th
+
s
ec
o
n
d
.
Fo
r
a
s
o
lu
tio
n
to
o
v
er
co
m
e
lar
g
e
b
u
s
v
o
ltag
e
d
r
o
p
s
,
th
e
DOL
m
eth
o
d
is
n
o
t
s
u
itab
le.
T
h
e
s
o
lu
tio
n
to
th
is
p
r
o
b
lem
is
to
u
s
e
th
e
VFD
m
eth
o
d
.
T
h
e
f
o
llo
win
g
g
r
ap
h
d
ata
c
o
m
p
a
r
es th
e
b
u
s
v
o
ltag
e
f
o
r
ea
c
h
m
eth
o
d
,
as seen
in
T
ab
le
1
2
.
I
n
th
e
DOL
m
et
h
o
d
,
at
t
h
e
0
th
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
is
g
i
v
en
at
1
0
0
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e;
at
th
e
1
st
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
d
r
o
p
s
to
8
5
.
7
1
%,
w
h
ich
h
as
a
d
if
f
e
r
en
ce
o
f
1
4
.
2
9
%.
Af
ter
th
at,
th
e
b
u
s
v
o
ltag
e
c
o
n
tin
u
es
t
o
in
c
r
ea
s
e
u
n
til
it
r
ea
ch
es
a
s
tead
y
s
tate
at
th
e
5
3
rd
s
ec
o
n
d
,
wh
i
ch
h
as
a
v
al
u
e
o
f
9
7
.
4
9
4
3
9
2
4
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e.
I
f
th
is
is
s
ep
ar
ate
d
f
r
o
m
th
e
0
th
s
ec
o
n
d
,
wh
ich
is
1
0
0
%,
th
en
th
e
s
tead
y
s
tate
v
o
ltag
e
d
ec
r
ea
s
es
b
y
2
.
5
%.
Nex
t,
in
th
e
VFD
m
eth
o
d
,
at
th
e
0
th
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
is
g
iv
en
at
1
0
0
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e.
At
th
e
1
st
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
is
co
n
s
tan
t;
at
th
e
1
0
th
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
h
as
d
ec
r
ea
s
ed
b
y
2
.
0
8
%,
s
o
th
e
v
alu
e
b
ec
o
m
es 9
7
.
9
2
%
o
f
t
h
e
n
o
m
in
al
b
u
s
v
o
ltag
e.
Af
ter
th
at
,
th
e
b
u
s
v
o
ltag
e
co
n
tin
u
es
to
i
n
cr
ea
s
e
u
n
til
it
r
ea
ch
es
a
s
tead
y
s
tate
at
th
e
1
1
th
s
ec
o
n
d
,
with
a
v
al
u
e
o
f
9
9
.
1
8
4
7
9
1
5
6
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e.
I
f
th
is
is
co
m
p
ar
ed
with
t
h
e
0
th
s
ec
o
n
d
,
w
h
ich
is
1
0
0
%,
th
en
th
e
s
tead
y
s
tate
h
as
a
v
o
ltag
e
d
r
o
p
o
f
0
.
.
8
1
5
2
%.
F
r
o
m
th
is
,
th
e
VFD
m
eth
o
d
ef
f
ec
tiv
ely
an
d
ef
f
icien
tly
o
v
er
ca
m
e
ex
ce
s
s
iv
e
b
u
s
v
o
ltag
e
d
r
o
p
s
.
T
h
en
,
with
t
h
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
,
at
th
e
0
th
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
is
g
i
v
en
at
1
0
0
%
o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e;
at
t
h
e
1
s
t
s
ec
o
n
d
,
th
e
b
u
s
v
o
ltag
e
d
r
o
p
s
b
y
6
.
9
8
%
s
o
th
at
t
h
e
v
alu
e
b
ec
o
m
es
9
3
.
0
1
6
7
5
4
1
5
% o
f
th
e
n
o
m
in
al
b
u
s
v
o
ltag
e,
th
e
b
ig
g
est b
u
s
v
o
ltag
e
d
r
o
p
in
th
e
1
2
th
s
ec
o
n
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ce
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r
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m
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al
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ter
th
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f
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it
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y
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tat
e
v
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ltag
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r
ea
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es b
y
2
.
5
%.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
52
In
d
o
n
esian
J
E
lec
E
n
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&
C
o
m
p
Sci
,
Vo
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3
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2
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Fig
u
r
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o
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u
r
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eth
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s
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ig
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ely
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ea
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t
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d
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ec
o
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d
s
.
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f
t
s
tar
tin
g
in
cr
ea
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es
th
e
ac
ce
ler
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to
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q
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lo
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s
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th
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e
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o
t
ex
p
e
r
ien
c
e
a
lar
g
e
s
p
ik
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in
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ler
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to
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th
e
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ir
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t
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ew
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o
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h
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f
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llo
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ata
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m
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ar
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ce
l
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eth
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d
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wh
ich
ca
n
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e
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e
en
in
T
ab
le
1
3
.
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eth
o
d
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t
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n
d
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,
th
e
m
o
to
r
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ik
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is
s
till
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n
ar
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;
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1
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ec
o
n
d
,
t
h
e
ac
ce
ler
at
io
n
to
r
q
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e
in
cr
ea
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es
to
6
3
.
0
9
%,
m
ea
n
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g
th
e
m
o
to
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b
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e
is
ac
ce
ler
atin
g
to
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ch
its
tar
g
et
s
p
ee
d
.
I
n
t
h
e
1
0
th
s
ec
o
n
d
,
th
e
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ce
ler
atio
n
to
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e
d
r
o
p
s
to
5
4
.
3
2
7
%.
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h
e
h
ig
h
est
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ce
ler
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n
to
r
q
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e
was
o
b
tain
ed
i
n
th
e
4
9
th
s
ec
o
n
d
+
at
8
4
.
4
%.
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th
e
5
4
th
s
ec
o
n
d
,
th
e
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ler
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n
to
r
q
u
e
h
as
r
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ed
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s
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wh
o
s
e
v
al
u
e
is
0
.
0
0
0
0
0
1
8
0
7
%;
at
th
is
s
ec
o
n
d
,
th
e
m
o
to
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b
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e
h
as
r
ea
ch
ed
its
tar
g
et
s
p
ee
d
s
o
th
at
th
e
ac
ce
ler
atio
n
to
r
q
u
e
is
n
o
lo
n
g
er
n
ee
d
ed
.
T
h
en
,
f
o
r
th
e
VFD
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d
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t
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ec
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d
s
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th
e
m
o
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o
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d
,
th
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ac
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ler
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to
r
q
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d
r
o
p
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s
o
th
at
th
e
v
alu
e
is
-
1
0
%,
m
ea
n
in
g
th
e
m
o
to
r
is
d
ec
eler
atin
g
.
I
n
th
e
1
0
th
s
ec
o
n
d
,
th
e
ac
ce
ler
atio
n
to
r
q
u
e
in
cr
ea
s
es
s
o
th
at
th
e
v
alu
e
b
ec
o
m
es
1
8
0
.
9
4
5
%;
in
th
is
s
itu
atio
n
,
th
e
m
o
to
r
b
ik
e
ex
p
e
r
ien
ce
s
lar
g
e
ac
ce
ler
atio
n
an
d
r
o
tatio
n
to
r
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h
its
tar
g
et
s
p
ee
d
.
T
h
e
h
ig
h
est
ac
ce
ler
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n
to
r
q
u
e
is
o
b
tain
ed
in
t
h
e
1
s
t
s
ec
o
n
d
+
at
2
8
5
.
5
%.
I
n
th
e
1
1
th
s
ec
o
n
d
,
t
h
e
ac
ce
ler
atio
n
to
r
q
u
e
h
as
r
e
ac
h
ed
a
s
tead
y
s
tate
wh
o
s
e
v
alu
e
is
0
%;
at
th
i
s
s
ec
o
n
d
,
it m
ea
n
s
th
e
m
o
to
r
h
a
s
r
ea
ch
ed
its
tar
g
et
s
p
ee
d
,
s
o
t
h
e
ac
ce
ler
atio
n
to
r
q
u
e
is
n
o
lo
n
g
er
n
ee
d
ed
.
Fu
r
th
er
m
o
r
e
,
in
t
h
e
s
o
f
t
s
tar
ti
n
g
m
eth
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at
0
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o
n
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s
,
th
e
m
o
to
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s
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s
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ar
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;
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1
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o
n
d
,
th
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ce
ler
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to
r
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e
in
cr
ea
s
es so
th
at
th
e
v
alu
e
is
1
0
.
7
5
%.
I
n
t
h
e
1
0
th
s
ec
o
n
d
,
th
e
ac
ce
ler
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n
to
r
q
u
e
in
cr
ea
s
es,
an
d
th
e
v
alu
e
b
ec
o
m
es
5
3
.
0
9
%.
T
h
e
m
o
to
r
b
ik
e
ex
p
er
ien
ce
s
lar
g
e
ac
ce
ler
atio
n
an
d
r
o
tati
o
n
to
r
ea
ch
its
tar
g
et
s
p
ee
d
in
th
is
s
itu
atio
n
.
T
h
e
h
i
g
h
est
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ce
ler
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n
t
o
r
q
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e
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o
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tain
ed
i
n
th
e
5
5
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o
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d
at
8
4
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5
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n
th
e
5
9
th
s
ec
o
n
d
,
th
e
ac
ce
ler
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n
to
r
q
u
e
h
as
r
ea
ch
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wh
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e
v
alu
e
is
0
.
0
0
0
0
0
0
1
8
%;
at
th
is
s
ec
o
n
d
,
it
m
ea
n
s
th
e
m
o
to
r
b
ik
e
h
as
r
ea
c
h
ed
its
tar
g
et
s
p
ee
d
,
s
o
th
e
ac
c
eler
atio
n
to
r
q
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e
is
n
o
lo
n
g
er
n
ee
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ed
.
Me
a
n
wh
ile,
f
o
r
th
e
au
to
tr
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n
s
f
o
r
m
er
m
eth
o
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at
0
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ec
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n
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s
,
th
e
m
o
to
r
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s
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s
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ar
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;
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1
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ec
o
n
d
,
th
e
ac
ce
ler
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n
to
r
q
u
e
in
cr
ea
s
es
s
o
th
at
th
e
v
alu
e
is
1
2
.
9
5
%.
I
n
th
e
1
0
th
s
ec
o
n
d
,
t
h
e
ac
ce
ler
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n
to
r
q
u
e
i
n
cr
ea
s
es
to
5
7
.
6
4
8
%.
T
h
e
m
o
to
r
b
ik
e
ex
p
er
ien
ce
s
lar
g
e
a
cc
eler
atio
n
an
d
r
o
tatio
n
to
r
ea
ch
its
tar
g
et
s
p
ee
d
in
t
h
is
s
itu
atio
n
.
T
h
e
h
ig
h
est
ac
ce
ler
atio
n
to
r
q
u
e
was
o
b
tain
ed
in
th
e
5
1
st
s
ec
o
n
d
at
8
4
.
5
%.
At
th
e
5
5
th
s
ec
o
n
d
,
th
e
ac
c
eler
atio
n
to
r
q
u
e
h
as
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2
5
0
2
-
4
7
52
Desig
n
o
f sta
r
tin
g
a
th
r
ee
p
h
a
s
e
in
d
u
ctio
n
mo
to
r
u
s
in
g
d
ir
ec
t
on
-
lin
e
…
(
Yu
lia
n
ta
S
ir
eg
a
r
)
709
r
ea
ch
ed
a
s
tead
y
s
tate,
th
e
v
alu
e
o
f
wh
ich
is
0
.
0
0
0
0
0
0
1
8
%;
at
th
is
s
ec
o
n
d
,
th
e
m
o
t
o
r
b
ik
e
h
as
r
ea
ch
ed
its
tar
g
et
s
p
ee
d
,
s
o
th
e
ac
ce
le
r
atio
n
to
r
q
u
e
is
n
o
lo
n
g
er
n
ee
d
ed
.
Fig
u
r
e
7
.
A
cc
eler
atio
n
to
r
q
u
e
f
o
r
ea
ch
m
eth
o
d
T
ab
le
13
.
C
o
m
p
ar
is
o
n
r
esu
lts
o
f
ac
ce
ler
atio
n
t
o
r
q
u
e
f
o
r
ea
ch
m
eth
o
d
Ti
me
i
n
t
e
r
v
a
l
(
sec
o
n
d
s)
A
c
c
e
l
e
r
a
t
i
o
n
t
o
r
q
u
e
(
%
t
o
r
q
u
e
)
DOL
V
F
D
S
o
f
t
s
t
a
r
t
i
n
g
A
u
t
o
t
r
a
n
sf
o
r
mer
1
6
3
.
0
9
-
10
1
0
,
7
5
1
2
.
9
5
10
5
4
.
3
2
1
8
0
.
9
4
5
3
.
0
9
5
7
.
6
4
20
3
1
.
7
8
3
1
.
7
7
4
3
.
8
7
3
4
.
4
4
30
2
0
.
3
2
0
2
5
.
5
0
2
1
.
3
0
40
1
9
.
7
2
0
1
8
.
6
2
1
8
.
9
5
50
3
0
.
4
4
0
2
6
.
2
3
6
7
.
5
4
60
0
0
0
0
3.
4
.
Co
m
pa
riso
n o
f
m
o
t
o
r
t
o
rque
f
o
r
ea
ch
m
e
t
ho
d
As
s
ee
n
in
F
ig
u
r
e
8
,
th
e
VFD
m
eth
o
d
h
as
th
e
h
ig
h
est
m
o
to
r
s
tar
tin
g
to
r
q
u
e,
r
ea
ch
i
n
g
2
9
1
.
5
%
in
th
e
1
st
+
s
ec
o
n
d
,
an
d
th
e
s
o
f
t
s
tar
ti
n
g
m
et
h
o
d
h
as
th
e
lo
west
s
tar
tin
g
to
r
q
u
e
o
f
2
0
.
7
5
%.
T
h
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
is
th
e
m
eth
o
d
t
h
at
tak
es
th
e
l
o
n
g
est
to
r
ea
ch
a
s
tead
y
s
tate,
n
am
ely
at
5
9
s
ec
o
n
d
s
,
f
o
llo
wed
b
y
th
e
au
to
tr
an
s
f
o
r
m
er
m
eth
o
d
at
5
5
s
ec
o
n
d
s
an
d
th
e
DOL
m
eth
o
d
at
5
3
s
ec
o
n
d
s
.
T
h
e
VFD
m
et
h
o
d
is
th
e
f
astes
t
to
r
ea
ch
a
s
tead
y
s
tate
in
th
e
1
1
th
+
s
ec
o
n
d
.
T
h
e
h
ig
h
est
p
ea
k
m
o
to
r
to
r
q
u
e
was
ex
p
er
ien
ce
d
b
y
th
e
VFD
m
eth
o
d
at
2
9
1
.
5
%.
T
h
e
f
o
llo
win
g
g
r
ap
h
d
ata
co
m
p
ar
es m
o
to
r
to
r
q
u
e
f
r
o
m
ea
c
h
m
eth
o
d
,
as seen
in
T
ab
le
1
4
.
I
n
th
e
DOL
m
eth
o
d
,
th
e
m
o
to
r
is
s
tatio
n
ar
y
at
0
s
ec
o
n
d
s
.
At
1
s
ec
o
n
d
,
th
e
m
o
t
o
r
to
r
q
u
e
in
cr
ea
s
es
to
7
3
.
0
9
%.
I
n
th
e
1
0
th
s
ec
o
n
d
,
t
h
e
m
o
to
r
to
r
q
u
e
d
ec
r
ea
s
es,
s
o
th
e
v
alu
e
b
ec
o
m
es
6
2
.
3
%.
T
h
e
h
ig
h
est
m
o
to
r
to
r
q
u
e
is
o
b
tain
e
d
in
th
e
4
9
th
s
ec
o
n
d
+,
at
1
7
3
%.
At
5
3
+
s
ec
o
n
d
s
,
th
e
m
o
to
r
to
r
q
u
e
h
as
r
ea
ch
ed
a
s
tead
y
s
tate
o
f
9
1
.
8
9
%.
T
h
en
,
f
o
r
t
h
e
VFD,
at
0
s
ec
o
n
d
s
,
th
e
m
o
to
r
is
s
till
at
r
es
t.
I
n
th
e
1
st
s
ec
o
n
d
,
th
e
m
o
to
r
to
r
q
u
e
r
em
ain
s
at
0
%
b
u
t
im
m
e
d
iately
in
cr
ea
s
es
d
r
asti
ca
lly
at
1
.
1
s
ec
o
n
d
s
to
2
9
1
.
5
%.
I
n
th
e
1
0
th
s
ec
o
n
d
,
th
e
m
o
to
r
to
r
q
u
e
in
cr
ea
s
es
d
r
asti
ca
lly
,
s
o
th
e
v
alu
e
b
ec
o
m
es
2
6
1
.
7
5
%.
T
h
e
h
i
g
h
est
m
o
t
o
r
to
r
q
u
e
was
o
b
tain
ed
i
n
th
e
11
th
s
ec
o
n
d
at
2
7
3
%,
b
u
t
th
is
s
p
ik
e
in
m
o
to
r
to
r
q
u
e
d
i
d
n
o
t
last
lo
n
g
b
ec
au
s
e,
at
1
1
+
s
ec
o
n
d
s
,
th
e
m
o
to
r
to
r
q
u
e
r
ea
ch
e
d
a
s
tead
y
s
tate
o
f
9
2
.
9
7
%.
C
o
m
p
ar
ed
with
th
e
DOL
m
eth
o
d
,
th
e
VFD
m
et
h
o
d
r
ea
ch
es
s
tead
y
s
tate
co
n
d
itio
n
s
m
o
r
e
q
u
ick
l
y
,
an
d
th
e
m
o
to
r
to
r
q
u
e
at
s
tead
y
s
tate
co
n
d
itio
n
s
is
g
r
ea
ter
th
an
th
at
o
f
th
e
DOL
m
eth
o
d
.
Fu
r
t
h
er
,
in
th
e
s
o
f
t
s
t
ar
tin
g
m
eth
o
d
,
at
0
s
ec
o
n
d
s
,
t
h
e
m
o
to
r
is
s
till
s
tatio
n
ar
y
;
at
1
s
ec
o
n
d
,
th
e
m
o
to
r
to
r
q
u
e
in
cr
ea
s
es
to
2
0
.
7
5
%.
I
n
th
e
1
0
th
s
ec
o
n
d
,
th
e
m
o
to
r
to
r
q
u
e
in
cr
ea
s
ed
to
5
6
.
4
5
%.
T
h
e
in
cr
ea
s
e
in
m
o
to
r
to
r
q
u
e
is
d
o
n
e
s
lo
wly
(
n
o
t
in
cr
ea
s
in
g
d
r
asti
ca
lly
o
r
d
ec
r
ea
s
in
g
d
r
asti
ca
lly
)
.
T
h
e
h
ig
h
est
m
o
to
r
to
r
q
u
e
was
o
b
tain
ed
in
t
h
e
5
5
th
s
ec
o
n
d
at
1
7
2
.
9
%.
T
h
e
m
o
to
r
to
r
q
u
e
is
s
tead
y
at
th
e
5
9
th
+
s
ec
o
n
d
,
wo
r
th
9
1
.
8
9
%.
C
o
m
p
ar
ed
with
th
e
DOL
m
e
th
o
d
,
th
e
s
o
f
t
s
tar
tin
g
m
eth
o
d
h
as
a
s
m
aller
m
o
to
r
s
tar
tin
g
to
r
q
u
e
in
th
e
1
s
t
s
ec
o
n
d
a
n
d
r
ea
ch
es
a
s
tead
y
s
tate
lo
n
g
e
r
th
a
n
th
e
DOL
m
eth
o
d
.
Me
a
n
wh
ile,
with
t
h
e
au
to
t
r
an
s
f
o
r
m
e
r
m
eth
o
d
,
at
0
s
ec
o
n
d
s
,
th
e
m
o
t
o
r
is
s
till
s
tatio
n
ar
y
;
at
1
s
ec
o
n
d
,
t
h
e
m
o
to
r
t
o
r
q
u
e
in
c
r
ea
s
es
to
2
2
.
9
5
%.
I
n
th
e
10
th
s
ec
o
n
d
,
th
e
m
o
to
r
to
r
q
u
e
in
cr
ea
s
ed
to
6
3
.
1
4
%.
T
h
e
h
ig
h
est
m
o
to
r
to
r
q
u
e
is
o
b
tain
ed
in
th
e
5
0
th
s
ec
o
n
d
+
at
1
7
2
.
9
%.
T
h
e
m
o
to
r
to
r
q
u
e
is
s
tead
y
at
th
e
5
5
th
+
s
ec
o
n
d
,
wo
r
th
9
1
.
8
9
%.
C
o
m
p
ar
e
d
wit
h
th
e
DOL
m
eth
o
d
,
th
e
au
to
tr
an
s
f
o
r
m
er
m
eth
o
d
h
as
a
s
m
aller
m
o
to
r
s
tar
tin
g
to
r
q
u
e
in
th
e
1
s
t
s
ec
o
n
d
an
d
r
e
ac
h
es
a
s
tead
y
s
tate
lo
n
g
er
th
a
n
th
e
DOL
m
et
h
o
d
b
u
t f
aster
th
an
t
h
e
s
o
f
t star
tin
g
m
eth
o
d
.
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