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ont
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of
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r
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abl
e s
pe
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t
he pu
m
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or
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as
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ac
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m
et
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s
.
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eyw
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d
s
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r
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p
s
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H
-
B
r
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c
as
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m
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O
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201
4
I
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A
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d
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ll
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.
1
.
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nt
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t
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n r
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s
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t
he v
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ab
l
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-
s
pee
d pu
m
p s
t
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age t
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h
ni
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s
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goo
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ay
t
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hoar
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a
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t
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s
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v
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nt
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1)
s
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ar
at
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ur
bi
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p,
(
2)
f
i
x
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s
pe
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p
t
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(
3)
v
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p
t
u
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bi
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e
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s
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o c
al
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s
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m
p t
ur
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s
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n
s
om
e
c
o
unt
r
i
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s
uc
h a
s
J
apan a
nd G
e
r
m
any
[
1
,
2
]
.
T
hi
s
c
onf
i
gu
r
at
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on c
on
s
i
s
t
s
of
t
w
o w
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r
s
an
d r
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s
i
bl
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p
-
t
ur
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a
c
hi
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e m
u
s
t
ope
r
at
e as
a g
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o
r
i
n t
u
r
b
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ode an
d a
s
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ha
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gi
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e
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t
i
on of
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i
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n t
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em
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s
oper
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pi
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m
od
e.
T
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c
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ev
e
v
ar
i
abl
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s
pe
ed
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p
s
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l
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f
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adj
us
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F
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t
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s
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n
pu
m
p
i
s
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v
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de
d
i
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o
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t
y
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s
:
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A
C
-
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C
)
c
y
c
l
o
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on
v
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er
,
t
w
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s
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c
k
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C
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C
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o
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l
s
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k
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o b
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c
k
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C
-
A
C
)
c
onv
e
r
t
er
an
d
H
-
br
i
dge c
a
s
c
ad
ed m
ul
t
i
l
ev
el
c
o
nv
er
t
er
[
3
]
.
S
om
e
of
t
hes
e po
w
e
r
el
ec
t
r
oni
c
s
c
onv
er
t
e
r
s
ar
e
appl
i
c
at
i
on
i
n
pum
p
s
t
o
r
a
ge
s
t
at
i
o
ns
i
n
s
om
e
c
o
unt
r
i
es
.
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he
H
-
br
i
dge
c
a
s
c
ade
d
m
u
l
t
i
l
ev
el
c
o
nv
er
t
er
i
s
a
ne
w
t
ec
h
nol
o
gy
un
der
s
t
u
dy
u
s
e
d
i
n
pum
p
s
t
o
r
age
s
t
at
i
on;
i
t
has
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om
e
f
e
a
t
ur
e
s
t
o u
s
e
i
n hi
gh po
w
er
ap
pl
i
c
at
i
on
[
4
,
5
]
.
T
he c
ont
r
ol
s
t
r
at
eg
y
us
ed i
n
[
4
]
i
s
open
l
o
op
c
o
nt
r
ol
(
p
ha
s
e
s
hi
f
t
ed
m
odul
a
t
i
on)
.
F
i
el
d
o
r
i
ent
ed
c
ont
r
ol
(
F
O
C
)
al
s
o
c
al
l
ed
v
ec
t
or
c
ont
r
ol
i
s
c
o
nt
r
ol
t
e
c
hni
qu
es
u
s
e
d
i
n
t
he
hi
gh
-
po
w
er
m
edi
um
v
ol
t
ag
e
dr
i
v
e.
I
t
h
as
a
num
be
r
of
f
eat
ur
e
s
,
i
nc
l
udi
ng:
(
1
)
c
a
n
be
de
s
i
gn
i
t
i
n
r
eal
t
i
m
e by
us
i
n
g di
gi
t
al
pr
o
c
e
s
s
or
s
,
(
2)
of
f
e
r
ex
c
e
l
l
ent
dy
nam
i
c
r
eal
i
z
at
i
o
n,
and
(
3
)
r
edu
c
e
m
ot
or
s
i
z
e
[
6]
.
A
l
t
hough
[
7
]
has
an
al
y
z
e
d
and
s
t
u
di
ed
t
he
m
at
he
m
a
t
i
c
al
dy
n
am
i
c
m
odel
of
D
F
A
S
P
S
U
,
b
y
us
i
ng r
ot
or
f
l
ux
f
i
el
d or
i
ent
c
ont
r
ol
t
ec
hni
qu
e d
epen
ded on
(
A
C
-
A
C
)
c
y
c
l
oc
o
nv
er
t
e
r
.
T
he
r
es
ul
t
s
c
o
m
p
ar
ed
w
i
t
h
t
he
O
h
k
a
w
a
c
hi
pow
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s
t
at
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on
i
n
J
apa
n.
F
i
el
d
o
r
i
ent
e
d
c
ont
r
ol
i
s
us
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t
o
pr
op
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e a r
o
t
or
s
p
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or
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nduc
t
i
o
n m
ac
hi
ne ba
s
e
d on a m
od
el
r
ef
er
en
c
e
ada
pt
i
v
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y
s
t
em
(
M
R
AS)
[
8]
.
I
n
t
hi
s
p
ape
r
,
t
he
m
at
h
em
at
i
c
al
m
odel
of
v
ar
i
abl
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-
s
p
eed
p
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p
s
t
or
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i
s
de
r
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v
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u
s
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s
t
at
or
f
l
ux
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di
r
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c
t
f
i
el
d or
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ent
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c
ont
r
o
l
(
I
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de
p
end
s
on t
he
H
-
b
r
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as
c
ad
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
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2
3
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2
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4
046
T
EL
K
O
M
N
I
K
A
T
E
L
K
O
M
NI
K
A
Vo
l
.
1
2
,
N
o
.
1,
J
anua
r
y
2014
:
xxx
–
xx
x
81
c
onv
e
r
t
er
.
Th
i
s
m
o
del
u
s
ed
t
o
o
bt
ai
n
t
h
e
v
ar
i
abl
e
s
peed
of
p
u
mp
s
t
or
a
ge
,
t
h
e s
l
i
p an
gl
e f
or
i
ndi
r
e
c
t
f
i
el
d
or
i
ent
e
d c
ont
r
ol
i
s
o
bt
ai
ne
d f
r
om
t
he m
eas
ur
e
d r
ot
o
r
s
pee
d an
d c
al
c
ul
at
ed s
t
at
or
f
l
ux
angl
e
ba
s
ed
on
m
a
c
hi
ne
p
ar
a
m
et
er
s
.
P
S
I
M
s
of
t
w
ar
e
pr
ogr
am
i
s
u
s
e
d
t
o
bui
l
d
t
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m
odel
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nd
s
at
i
s
f
i
e
d
t
he
s
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m
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at
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on.
2.
R
ese
ar
ch
M
et
h
o
d
2.
1
.
A
na
l
y
s
i
s
of
V
e
c
t
or
C
ont
rol
I
n
[
6
]
and
[
9
]
F
O
C
and
i
t
s
appl
i
c
at
i
on
i
n
an
i
n
du
c
t
i
on
m
ac
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ne
hav
e
bee
n
di
s
c
u
s
s
ed.
I
t
c
on
s
i
s
t
s
of
c
o
nt
r
ol
l
i
ng
t
he
ac
v
ol
t
age
a
nd
c
ur
r
ent
r
epr
e
s
ent
e
d
by
a
v
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t
or
.
T
hi
s
c
o
nt
r
ol
ba
s
ed
o
n
t
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t
r
ans
f
o
r
m
at
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on f
r
om
s
t
at
i
onar
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f
r
am
e
of
t
he
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nduc
t
i
on
m
ac
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t
o t
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s
y
nc
h
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o
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s
f
r
a
m
e
s
i
m
i
l
ar
t
o
t
hat
of
a
D
C
m
ac
hi
ne
c
o
nt
r
ol
.
T
hi
s
pap
er
f
oc
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s
e
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o
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n v
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o
r
ag
e ba
s
ed
H
-
br
i
dg
e
c
a
s
c
a
ded
m
ul
t
i
l
ev
e
l
c
o
nv
er
t
e
r
t
o
obt
ai
n
t
he
v
ar
i
abl
e
s
pe
e
d of
t
h
e p
um
p s
t
o
r
a
ge.
FO
C
t
heor
y
dep
en
ds
on t
he
c
onv
er
s
i
on of
a s
t
at
i
onar
y
f
r
am
e t
o
s
y
nc
h
r
on
ou
s
f
r
am
e of
phy
s
i
c
al
quant
i
t
i
e
s
s
u
c
h
a
s
c
u
r
r
ent
,
v
ol
t
age,
m
agnet
i
c
f
l
ux
an
d
t
r
ans
f
e
r
of
ac
qua
nt
i
t
i
es
t
o
dc
quant
i
t
i
es
i
n
a
s
y
nc
hr
o
n
ous
f
r
am
e
c
o
rr
es
pon
di
ng
t
o
t
h
e
ac
f
r
eq
ue
nc
y
.
D
y
nam
i
c
m
o
del
of
t
he
i
nduc
t
i
on
m
a
c
hi
ne
i
s
di
v
i
ded
i
nt
o
t
w
o
t
y
pes
:
s
pa
c
e
v
ec
t
or
and
dq
a
x
i
s
mo
d
e
l
.
B
ot
h m
odel
s
ar
e
ev
e
nl
y
v
al
i
d f
or
t
he
anal
y
s
i
s
of
t
r
an
s
i
ent
a
nd s
t
e
ady
-
s
t
at
e
per
f
o
r
m
an
c
e
of
t
he
i
nduc
t
i
on
m
ac
hi
ne.
T
he s
t
at
o
r
a
n
d r
ot
o
r
v
ol
t
age of
s
y
m
m
et
r
i
c
al
t
h
r
ee
pha
s
e i
nd
uc
t
i
on m
ac
hi
ne i
n s
pa
c
e
v
ec
t
or
m
o
del
[
6
]
ar
e
gi
v
en
by
ss
s
s
ss
d
v
Ri
j
dt
λ
ωλ
=
++
(
1)
(
)
rr
s
r
r
sr
d
v
R
i
j
dt
λ
ω
ω
λ
=
+
+
−
(
2)
w
he
r
e
s
v
i
s
t
he
s
t
at
or
v
ol
t
a
ge
v
ec
t
or
,
s
i
i
s
t
he
s
t
at
or
c
ur
r
en
t
v
ec
t
or
,
r
v
t
he r
ot
or
v
ol
t
ag
e
v
ec
t
or
,
r
i
t
he
r
ot
or
c
ur
r
ent
,
s
R
t
he
s
t
at
or
r
es
i
s
t
an
c
e,
r
R
t
he
r
ot
o
r
r
e
s
i
s
t
anc
e,
s
λ
i
s
t
he
s
t
at
or
f
l
ux
l
i
nk
age
v
ec
t
or
,
r
λ
i
s
t
he r
ot
or
f
l
ux
l
i
nk
a
ge v
ec
t
o
r
,
s
ω
i
s
t
he s
y
nc
hr
ono
us
f
r
e
quen
c
y
of
s
t
at
i
onar
y
r
ef
er
en
c
e
f
r
a
m
e
and
r
ω
t
he
r
o
t
or
f
r
equ
en
c
y
of
s
t
at
i
onar
y
r
ef
er
en
c
e
f
r
a
m
e.
F
lu
x
l
i
nk
ag
e
equat
i
o
ns
ss
r
sm
L
i
L
i
λ
=
+
(
3)
rr
s
rm
Li
L
i
λ
=
+
(
4)
w
h
e
re
s
l
s
m
LL
L
=
+
i
s
t
he
s
t
at
or
s
el
f
i
nd
u
c
t
an
c
e,
r
l
r
m
LL
L
=
+
i
s
t
he
r
ot
or
s
el
f
i
nd
uc
t
an
c
e
;
m
L
i
s
t
he m
agn
et
i
z
i
ng
i
ndu
c
t
anc
e;
and
l
s
L
an
d
l
r
L
ar
e t
he
s
t
at
or
a
nd
r
ot
or
l
e
ak
age i
ndu
c
t
an
c
e
s
r
e
sp
e
c
ti
ve
l
y.
T
he dq m
od
el
of
i
nduc
t
i
o
n m
ac
hi
ne c
an be obt
ai
n
ed us
i
n
g t
hr
e
e
-
ph
as
e c
i
r
c
ui
t
t
heor
y
and
t
h
en
t
r
an
s
f
or
m
ed
i
nt
o
t
he
t
w
o
ph
as
e
f
r
am
e.
T
h
e
s
pa
c
e
v
ec
t
o
r
s
of
i
ndu
c
t
i
on
m
a
c
hi
ne
m
o
del
i
nt
o
d
and
q
a
x
i
s
c
om
p
one
nt
s
gi
v
en
by
:
;;
s
ss
ds
qs
ds
qs
ds
qs
v
v
jv
i
i
ji
j
λ
λ
λ
=
+=
+
=
+
(
5)
;
;
r
rr
dr
qr
dr
qr
dr
qr
v
v
jv
i
i
ji
j
λλ
λ
=
+
=
+
=
+
(
6
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
2
3
0
2
-
4
046
M
odel
i
n
g
and
S
i
m
ul
at
i
on
of
P
um
p
S
t
or
age
B
as
ed
o
n
I
ndi
r
e
c
t
F
i
el
d
O
r
i
ent
e
d
.
.
.
(
O
t
hm
an
H
A
)
82
T
he dq e
quat
i
ons
c
an b
e obt
ai
ne
d by
s
ubs
t
i
t
ut
i
ng
(
5
)
and (
6
)
i
n
(
1)
t
o (
4
)
,
t
he dq ax
i
s
v
ol
t
a
ge
equat
i
o
ns
c
al
c
ul
at
e
d
by
:
;
ds
s
ds
ds
s
qs
qs
s
qs
qs
s
ds
d
d
v
Ri
v
Ri
dt
dt
λ
ωλ
λ
ωλ
=
+−
=
++
(
7)
(
)
(
)
;
dr
r
dr
dr
s
r
qr
qr
r
qr
qr
s
r
dr
dd
v
R
i
v
R
i
dt
dt
λ
ω
ω
λ
λ
ω
ωλ
=
+−
−
=
++
−
(
8)
2
.
2
.
M
ode
l
o
f
V
ar
i
ab
l
e
S
pe
e
d
P
um
p
S
t
ora
ge
T
he
f
i
el
d
or
i
e
nt
ed
c
ont
r
ol
c
an
be
gen
er
a
l
l
y
c
l
as
s
i
f
i
ed
i
nt
o
t
w
o
t
y
pe
s
;
di
r
e
c
t
f
i
el
d
o
r
i
ent
e
d
c
ont
r
ol
an
d i
ndi
r
e
c
t
o
r
i
ent
ed c
ont
r
ol
[
6
,
1
0
]
.
T
he t
y
pes
of
f
i
el
d or
i
ent
at
i
o
n di
v
i
ded i
nt
o t
hr
ee
t
y
pes
;
s
t
at
or
f
l
ux
,
r
ot
or
f
l
ux
,
and
ai
r
-
ga
p
f
l
ux
[
1
1
]
.
I
n
t
hi
s
pa
per
,
t
he s
t
at
o
r
of
t
he w
o
und
r
ot
or
i
nd
uc
t
i
o
n
m
ac
hi
ne i
s
di
r
e
c
t
l
y
c
on
n
ec
t
ed t
o
t
he
g
r
i
d,
a
nd
i
t
s
v
ol
t
age
an
d
f
r
e
que
nc
y
c
an
b
e
c
on
s
i
d
er
ed
c
on
s
t
ant
und
er
t
he
no
r
m
al
ope
r
at
i
n
g
c
on
di
t
i
on
s
.
I
t
i
s
,
t
her
ef
o
r
e,
c
on
s
o
nant
w
it
h
us
e
s
t
a
t
o
r
v
ol
t
age
or
i
e
nt
ed
c
o
nt
r
ol
(S
V
O
C
)
f
o
r
bui
l
d
t
he m
od
el
.
T
he
s
t
at
or
v
ol
t
age o
r
i
ent
ed c
ont
r
ol
i
s
ac
hi
ev
ed b
y
al
i
gni
ng t
h
e d
-
ax
i
s
of
t
he
s
y
nc
hr
o
nou
s
r
ef
er
en
c
e
f
r
a
m
e
w
i
t
h
t
he
s
t
at
or
v
ol
t
age
v
ec
t
or
v
s
.
t
he
r
es
ul
t
a
nt
d
-
and
q
-
ax
i
s
s
t
at
or
v
ol
t
ages
a
r
e
0;
qs
ds
s
v
vv
=
=
(
9
)
B
as
ed
o
n t
he m
eas
u
r
ed
r
o
t
or
c
u
r
r
e
nt
v
ar
i
abl
e a
nd t
he m
ac
hi
ne m
odel
,
t
he s
t
at
or
f
l
ux
m
et
hod c
al
c
u
l
at
es
(
1)
t
he s
t
i
p
an
gl
e
sl
θ
f
or
f
i
el
d o
r
i
e
nt
a
t
i
on,
(
2)
t
he f
l
ux
pr
o
du
c
i
ng
c
u
r
r
e
nt
d
r
i
,
(
3)
t
he
el
e
c
t
r
om
agn
et
i
c
t
or
que
e
T
or
t
he
t
or
que
p
r
od
uc
i
ng
c
u
r
r
ent
q
r
i
and
(
4
)
t
he
s
t
a
t
or
s
pe
ed
s
ω
.
F
or
i
ndi
r
ec
t
f
i
el
d
-
o
r
i
e
nt
ed
c
ont
r
ol
s
c
he
m
es
t
h
e
an
gl
e
bet
w
e
en
t
h
e
s
t
at
or
v
ol
t
a
ge
v
ec
t
or
an
d
t
he
r
ot
or
i
s
t
he
s
l
i
p
angl
e,
c
al
c
ul
at
ed
by
sl
s
r
θ
θθ
=
−
(1
0
)
or
(
)
sl
s
r
dt
θ
ωω
=
−
∫
(1
1
)
T
he
s
t
at
or
c
u
r
r
e
nt
r
s
m
s
s
Li
i
L
λ
−
=
(1
2
)
i
nt
o
(
1
)
y
i
e
ld
s
(
)
s
s
sr
s
s
ms
s
R
d
v
Li
j
L
dt
λ
ωλ
λ
=
−+
+
(1
3
)
f
r
om
w
hi
c
h
1
rs
r
s
s
s
m
d
j
v
Li
dt
τ
ωλ
τ
++
=
+
(1
4
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
2
3
0
2
-
4
046
T
EL
K
O
M
N
I
K
A
T
E
L
K
O
M
NI
K
A
Vo
l
.
1
2
,
N
o
.
1,
J
anua
r
y
2014
:
xxx
–
xx
x
83
Wh
e
re
s
τ
i
s
t
he
s
t
at
or
t
i
m
e
c
o
ns
t
ant
,
c
al
c
ul
at
ed
by
s
s
s
L
R
τ
=
(1
5
)
R
e
s
ol
v
i
ng (
1
4
)
i
nt
o t
he
dq
-
ax
i
s
c
om
pone
nt
s
a
c
c
or
di
n
g t
o (
9
)
and
(
)
0&
qs
ds
s
j
λ
λλ
=
=
obt
ai
ne
d
1
s
s
s
s
m
dr
d
v
Li
dt
λ
ττ
+=
+
(
16
)
s
s
s
m
qr
Li
ω
λ
τ
=
(
17
)
f
r
om
w
hi
c
h
m
s
qr
ss
L
i
ω
τλ
=
(
18
)
F
i
gur
e 1
s
h
o
w
s
t
he bl
oc
k
di
ag
r
am
of
i
ndi
r
e
c
t
f
i
el
d
or
i
ent
e
d
c
ont
r
ol
w
i
t
h
s
t
a
t
o
r
f
l
ux
of
v
ar
i
abl
e
s
pe
ed
pum
p
s
t
or
a
ge.
F
r
o
m
(
16
)
dur
i
ng
ope
r
at
i
on
*
s
λ
i
s
ke
p
t
co
n
st
a
n
t
*
0
s
d
dt
λ
=
t
her
ef
or
e,
*
dr
i
c
an
b
e
w
r
i
t
t
e
n
as
:
*
*
s
ds
s
dr
m
v
i
L
λτ
−
=
(
19
)
Ac
c
o
r
d
i
n
g
t
o
[
1
0
]
t
he el
e
c
t
r
om
agn
et
i
c
t
or
qu
e c
an
be ex
p
r
e
s
s
a
s
a f
u
nc
t
i
o
n o
f
r
o
t
or
c
ur
r
e
nt
and
s
t
at
or
f
l
ux
l
i
nk
a
ges
:
(
)
e
T
qr
ds
dr
qs
TK
i
i
λλ
=
−+
(2
0
)
w
h
e
re
3
2
m
T
s
P
L
K
L
=
.
Wri
t
i
n
g
(2
0
)
i
nt
o dq
-
ax
i
s
c
om
p
one
nt
s
and t
ak
i
ng
i
nt
o ac
c
ou
n
t
t
he s
t
at
or
f
l
ux
or
i
ent
at
i
on
(
)
0,
qs
ds
s
j
λ
λλ
=
=
*
*
*
1
qr
e
Ts
i
T
K
λ
−
=
(2
1
)
A
c
c
o
r
di
ng
t
o
[
7
]
t
he
pow
e
r
of
gener
at
or
and
m
ot
o
r
c
al
c
ul
at
e
d
by
G
e
ne
r
at
or
T
J
P
P
P
=
−
(2
2
)
M
ot
or
P
J
P
P
P
=
+
(2
3
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
2
3
0
2
-
4
046
M
odel
i
n
g
and
S
i
m
ul
at
i
on
of
P
um
p
S
t
or
age
B
as
ed
o
n
I
ndi
r
e
c
t
F
i
el
d
O
r
i
ent
e
d
.
.
.
(
O
t
hm
an
H
A
)
84
w
he
r
e
G
e
ne
r
at
or
P
i
s
t
h
e
po
w
er
out
p
u
t
of
gene
r
at
o
r
,
M
ot
or
P
i
s
t
h
e p
ow
er
i
n
put
of
m
ot
or
,
T
P
i
s
t
he
pow
er
out
p
ut
of
t
ur
bi
ne,
P
P
i
s
t
he
po
w
er
i
nput
of
pum
p,
and
J
P
i
s
t
he
el
ec
t
r
i
c
al
po
w
e
r
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S
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)
s
c
hem
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f
or
t
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uni
t
w
a
s
de
r
i
v
ed
an
d
s
i
m
ul
at
ed.
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he
u
s
e
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t
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s
k
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d
of
t
ec
hn
ol
ogy
(
i
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c
t
f
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el
d
o
r
i
ent
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c
ont
r
ol
s
t
a
t
o
r
f
l
u
x
t
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p
e
)
i
t
ea
s
y
o
bt
ai
ned
t
he
v
ar
i
abl
e
s
pe
ed
of
pum
p s
t
or
ag
e
and
be
s
t
v
al
ue of
r
ea
c
t
i
v
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w
e
r
.
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he
p
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ec
t
r
oni
c
s
c
onv
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er
us
ed
t
o
gener
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hi
gh v
ol
t
age
on t
he r
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or
s
i
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s
t
w
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c
al
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H
-
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r
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dge c
a
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ad
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m
ul
t
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o
nv
er
t
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ed
i
n
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a
s
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ade.
T
he
s
y
s
t
em
h
as
be
en
anal
y
z
ed
by
us
i
ng t
h
e P
S
I
M
s
of
t
w
a
r
e
p
r
og
r
am
.
R
ef
er
en
ces
[
1
]
K
u
w
a
bar
a
T
S
,
A
.
F
ur
ut
a,
H
.
K
i
t
a,
E
.
M
i
t
s
uhas
h
i
,
K
.
D
es
i
gn
an
d d
y
n
am
i
c
r
es
pons
e c
h
ar
ac
t
er
i
s
t
i
c
s
of
4
00
M
W
adj
us
t
ab
l
e
s
peed
pum
p
e
d s
t
or
ag
e uni
t
f
or
O
hk
a
w
ac
h
i
po
w
er
s
t
at
i
on.
En
e
rg
y C
o
n
v
e
rsi
o
n
,
I
EEE
T
r
ans
ac
t
i
o
ns
o
n
.
1996;
11(
2)
:
3
76
-
8
4.
[
2
]
G
r
ot
enbur
g K
,
K
oc
h F
,
E
r
l
i
c
h I
,
B
ac
hm
ann
U
.
M
odel
i
ng
and d
y
n
am
i
c
s
i
m
ul
at
i
on of
v
a
r
i
abl
e s
pe
e
d
pum
p
s
t
or
ag
e
uni
t
s
i
nc
or
p
or
a
t
ed
i
nt
o
t
he
G
er
m
a
n
el
ec
t
r
i
c
po
w
e
r
s
y
s
t
em
.
E
P
E
T
r
ondh
ei
m
.
200
1;
8(
1)
:
6
7
-
7
7.
[
3
]
A
bda
l
l
a
O
.
H
,
M
.
X
.
H
an.
P
o
w
er
E
l
ec
t
r
o
ni
c
s
C
onv
er
t
er
s
f
or
V
ar
i
a
bl
e
S
pe
e
d
P
um
p
S
t
or
ag
e.
I
nt
er
nat
i
ona
l
Jo
u
rn
a
l
o
f
Po
w
e
r El
e
ct
ro
n
i
cs a
n
d
D
r
i
ve
Syst
e
m
s (I
JPED
S).
2013;
3(
1)
:
74
-
82.
[
4
]
A
b
d
a
l
l
a
O.H
, M
.X
.H
a
n
.
V
ar
i
abl
e s
pe
ed pu
m
p
ed s
t
or
a
ge
bas
ed o
n t
he
us
e of
H
-
br
i
d
ge c
as
c
a
de
d
m
u
l
t
i
l
ev
el
c
onv
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t
er
.
20
12
I
E
E
E
7t
h
I
nt
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al
P
o
w
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E
l
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t
r
oni
c
s
an
d
M
ot
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on
C
o
nt
r
ol
C
o
nf
er
enc
e
-
E
C
C
E
A
s
i
a.
H
ar
pi
n.
201
2:
40
2
-
40
5.
[
5
]
Lee S
H
.
D
es
i
g
n of
a c
as
c
ad
e
d H
-
b
r
i
d
ge m
u
l
t
i
l
ev
el
i
nv
er
t
er
bas
e
d on p
o
w
e
r
el
ec
t
r
on
i
c
s
bu
i
l
di
ng b
l
oc
k
s
and c
o
nt
r
ol
f
or
hi
g
h per
f
or
m
a
n
c
e.
J
our
na
l
of
P
ow
er
E
l
ec
t
r
on
i
c
s
.
2010;
1
0(
3)
:
262
-
2
69.
[
6
]
W
u B
.
H
i
gh
-
po
w
e
r
c
onv
er
t
er
s
and A
C
dr
i
v
es
.
N
e
w
J
er
s
e
y
:
W
i
l
e
y
-
I
EEE Pre
ss.
2
0
0
6
:
2
8
8
-
291.
[
7
]
Lun
g J
K
L,
Y
.
H
ung
,
W
.
L.
K
ao,
W
.
S
.
M
odel
i
ng
and d
y
n
am
i
c
s
i
m
ul
at
i
ons
of
dou
bl
y
f
ed a
dj
us
t
abl
e
-
s
p
eed
pum
p
ed s
t
or
a
g
e uni
t
s
.
E
ner
gy
C
onv
er
s
i
on,
I
E
E
E
T
r
ans
ac
t
i
ons
on
.
2
007;
2
2(
2)
:
25
0
-
25
8.
[
8
]
Li
Z
i
c
he
ng
,
Y
in
Z
houpi
ng
,
X
i
o
ng
Y
o
ul
un
,
Li
u
Xi
n
z
h
i
.
R
ot
or
S
pee
d an
d S
t
at
or
R
es
i
s
t
a
nc
e I
dent
i
f
i
c
at
i
o
n
S
c
hem
e
f
o
r
s
ens
or
l
es
i
nd
uc
t
i
on
m
ot
or
dr
i
v
es
.
T
E
LK
O
M
N
I
K
A
I
ndo
nes
i
an
j
our
nal
of
el
ec
t
r
i
c
a
l
eng
i
ne
er
i
ng .
2
013;
1
1(
1)
:
5
03
-
501
2
.
[
9
]
Lai
Y
-
S
.
M
ac
hi
n
e
m
od
el
i
ng
and
u
ni
v
er
s
al
c
ont
r
ol
l
er
f
or
v
ec
t
or
-
c
ont
r
ol
l
ed
i
nduc
t
i
on
m
ot
or
dr
i
v
es
.
E
ner
gy
C
onv
er
s
i
on,
I
E
E
E
T
r
ans
ac
t
i
o
ns
on
.
2
003;
1
8(
1)
:
2
3
-
3
2.
[
10
]
W
u
B
,
La
ng
Y
,
Z
ar
gar
i
N
,
K
our
o
S
.
P
o
w
e
r
c
onv
er
s
i
o
n
a
nd
c
ont
r
ol
of
w
i
nd
e
ner
g
y
s
y
s
t
em
s
.
N
e
w
Je
rse
y
:
W
i
l
e
y
-
I
EEE Pre
ss;
.
2
0
1
1
:
2
5
4
-
2
57.
[
11
]
Se
i
b
e
l
BJ,
R
o
w
a
n
T
M,
Ke
rkma
n
R
J.
F
i
e
l
d
-
or
i
ent
ed c
ont
r
ol
of
a
n i
nd
uc
t
i
on m
ac
hi
ne
i
n t
he
f
i
e
ld
-
w
e
ak
eni
ng
r
e
gi
o
n
w
i
t
h
D
C
-
l
i
nk
and
l
o
a
d
di
s
t
ur
ba
nc
e
r
ej
ec
t
i
on.
I
n
d
u
st
ry
Ap
p
l
i
c
a
t
i
o
n
s,
I
EEE
T
r
ans
ac
t
i
o
ns
o
n.
1997;
33(
6)
:
1
578
-
158
4.
[
12
]
P
an
W
an
g
,
F
ei
Li
u
,
X
i
aom
i
ng
Z
ha
,
J
i
an
hu
a
Yu
,
X
i
an
gb
i
ng
W
ang
.
R
e
ae
ar
c
h on
a n
e
w
t
y
pe of
e
ner
g
y
f
eedb
ac
k
c
as
c
ade
m
ul
t
i
l
ev
el
i
n
ve
rt
e
r
s
yst
e
m.
T
E
LK
O
M
N
I
K
A
I
ndo
n
es
i
a
n j
our
n
al
of
el
ec
t
r
i
c
a
l
eng
i
ne
er
i
ng.
20
13
;
11
(
1)
:
4
94
-
502.
0
0
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1
1
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2
2
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