Internati
o
nal
Journal of P
o
wer Elect
roni
cs an
d
Drive
S
y
ste
m
(I
JPE
D
S)
Vol
.
6
,
No
. 2,
J
une
2
0
1
5
,
pp
. 36
2~
36
9
I
S
SN
: 208
8-8
6
9
4
3
62
Jo
urn
a
l
h
o
me
pa
ge
: h
ttp
://iaesjo
u
r
na
l.com/
o
n
lin
e/ind
e
x.ph
p
/
IJPEDS
A Modified Bridgeless Convert
er for SRM Drive with Reduced
Ripple Current
C
.
Ma
heswari*
, Ra
ni
Tho
ttunga
l
**
,
A.C. D
i
vy
a**
*
*Anna Univers
i
t
y
,
Chenn
a
i
,
Ind
i
a
**Kumaraguru College of
Tech
nolog
y
,
Ind
i
a
***Dr.N.G.P. In
stitute of
Techno
log
y
, Ind
i
a
Article Info
A
B
STRAC
T
Article histo
r
y:
Received Nov 1, 2014
R
e
vi
sed M
a
r
4,
2
0
1
5
Accepte
d Apr 1, 2015
A Single Phase Switched
Relu
ctan
ce Motor
is more popular
in m
a
n
y
industrial purpo
ses for high sp
eed appl
ic
ations
because of its
robust and
rugged construction. For low cost and va
riable sp
eed drive
applications SRM
are widely
used.Due to doubly
salien
t structure of motor, the torque
puls
a
tions
ar
e hi
gh when com
p
ar
ed to
oth
e
r sinus
oidal mach
ines.
The major
drawback
in using SRM drive
is torque
pu
lsatio
ns and in
creased
number of
switching components. In order
to ove
rcome th
ese drawbacks,
a bridgeless
Single
Ended Pr
imar
y
Inductor
Convert
er
(SEPIC) is proposed
.
The majo
r
advantages
of th
is
conver
t
er are con
tinuous outp
u
t curr
ent, smaller voltage
ripple
and redu
ced semiconductor curre
n
t
stress when compared to th
e
conventional SEPIC converter
.
The rippl
e free
input curr
ent is
obtain
e
d b
y
using additional winding of
in
put indu
ctor an
d
auxi
liar
y
c
a
p
aci
tors
. To
achi
e
ve h
i
gh ef
fici
enc
y
,
a
c
tiv
e
power fac
t
or co
rrect
ion c
i
rcui
ts
(P
F
C
) are
em
plo
y
ed to pre
c
is
e th
e power f
actor
. F
u
rther
,
th
e unity
power f
a
ctor can be
obtain
e
d b
y
making the input cur
r
ent
during switching period pro
portional to
the inpu
t voltag
e
is proposed.
The pr
oposed s
y
stem consists
of reduced
components and
it is also capable of
redu
cing
the conduction
losses. Th
e
working princip
l
es and th
e waveforms of proposed conv
erter
ar
e analy
z
ed
.
To ana
l
yz
e th
e
circu
it op
erat
ion
,
th
eoret
i
c
a
l
ana
l
y
s
is
and s
i
m
u
la
tion res
u
l
t
s
are provid
e
d. Finally
,
th
e comparison between th
e
waveforms of
conventional SEPIC and proposed sy
stem is presented b
y
using
MATLAB/Sim
u
link too
l
s.
Keyword:
Brid
g
e
less conv
erter
I
ndu
cto
r
conv
er
ter
Power factor
c
o
rrection
Pu
lse wid
t
h
mo
du
latio
n
Rip
p
l
e r
e
du
ctio
n
SEPIC
Switch
e
d
relu
ctan
ce
m
o
to
r
Copyright ©
201
5 Institut
e
o
f
Ad
vanced
Engin
eer
ing and S
c
i
e
nce.
All rights re
se
rve
d
.
Co
rresp
ond
i
ng
Autho
r
:
C. Mah
e
swari,
Depa
rt
m
e
nt
of
El
ect
ri
cal
and
El
ect
roni
cs
E
n
gi
nee
r
i
n
g,
Dr. N.G.P. In
st
itu
te o
f
Tech
nolo
g
y
,
Co
im
b
a
to
r
e
641
048
,
In
d
i
a.
Em
a
il: mah
e
swari
k
rish
n
a
kumar@y
m
a
il.co
m
1.
INTRODUCTION
In the
past two decades
, Switched
relucta
n
c
e
Mo
tor
(SRM
) drive has rec
e
ntly develope
d for m
a
ny
i
n
d
u
st
ri
al
ap
pl
i
cat
i
ons. T
h
e S
R
M
dri
v
e has
m
o
re advant
a
g
es ove
r i
n
d
u
ct
i
on m
o
t
o
r o
r
ot
her t
y
pes o
f
sp
eci
al
machines suc
h
as perm
anent
m
a
gnet sync
hronous m
o
tor.
The a
dva
ntages suc
h
as
lower
p
r
ice, imp
r
ov
ed
p
e
rform
a
n
ce, b
e
tter reliab
ility, co
m
p
arab
le o
r
b
e
tter
efficien
cy, lo
wer
vo
lu
m
e
an
d
ease o
f
p
r
od
u
c
tion
and
st
ora
g
e whe
n
c
o
m
p
ared
t
o
var
i
ous
AC
an
d D
C
m
o
t
o
r
d
r
iv
es [1
].
Th
e m
a
j
o
r dr
awb
a
ck
s o
f
SRM
driv
e
is
large
t
o
r
que
ri
p
p
l
e
s
due
t
o
i
t
s
di
sc
ont
i
n
ui
t
y
i
n
t
h
e ge
nerat
e
d t
o
r
que
. B
y
usi
n
g
pha
se cu
rre
nt
ove
rl
ap
pi
n
g
m
e
t
h
o
d
,
the torque
ripples can be re
duced to
a sm
all
ext
e
nt
. To
rq
u
e
ri
ppl
es al
so
pr
o
duce
d
d
u
e t
o
bac
k
em
f prod
uce
d
during c
o
mm
u
t
ation of eac
h
pha
se caus
e
s the stator cu
rre
nt to fall
behi
nd t
h
e re
fere
n
ce cur
r
e
n
t. A
f
ter th
e
occurre
nce of refe
rence
c
u
rrent,
th
e phase current reache
s
zero
causing
a
ne
gative torque
and
high t
o
rque
ri
p
p
l
e
s pr
o
duc
ed by
SR
M
dr
i
v
e. The
r
efore, converters which are use
d
in
SRM drive are to be
m
odifi
ed to
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
088
-86
94
I
J
PED
S
Vo
l. 6,
No
.
2,
Ju
ne 20
15
:
362
–
3
69
36
3
h
a
v
e
fast co
mm
u
t
a
tio
n
ab
ility fo
r its d
e
sirab
l
e op
eration
[4
], [6
] an
d
[8
]. In
m
o
st o
f
the AC-DC conv
erters
use
d
f
o
r c
onst
a
nt
s
p
eed
d
r
i
v
e ap
pl
i
cat
i
ons
[5]
req
u
i
r
es
many active
power factor
correctio
n circu
its (PFC)
due
t
o
t
h
e
dem
a
nd
i
n
hi
g
h
e
ffi
ci
ency
an
d l
o
w
ha
rm
oni
c p
o
l
l
u
t
i
o
n
.
Gen
e
rally, a full-b
r
idg
e
d
i
o
d
e
rectifier is e
m
p
l
o
y
ed
at
th
e in
pu
t cu
rren
t p
a
th
so
th
at it p
r
od
u
c
es
m
o
re
co
ndu
ctio
n lo
sses du
ri
n
g
low lin
e. To
so
lv
e th
is pro
b
l
em
, bri
dgel
e
ss
co
n
v
ert
e
r
s
are
p
r
o
pos
ed t
o
a
voi
d
i
n
p
u
t
bri
dge
di
o
d
e a
nd t
h
e co
n
duct
i
on l
o
s
s
[
2
]
.
A
bri
dgel
e
ss S
E
P
I
C
co
nve
rt
er c
a
n act
as b
o
t
h
buc
k a
nd
b
oost
m
ode
as per t
h
e a
p
p
l
i
cat
i
ons and
m
o
st
co
m
m
only
used t
o
re
d
u
ce i
nput
c
u
r
r
e
n
t
ri
p
p
l
e
. Fo
r
l
o
w v
o
l
t
a
ge s
w
i
t
c
hed
m
o
d
e
po
wer su
pp
lies an
d SRM d
r
i
v
es, it
requ
ires low
vo
ltag
e
wh
en co
m
p
ared
t
o
p
e
ak
vo
ltag
e
o
f
in
pu
t
v
o
ltag
e
[2
]. So, a br
idg
e
less
bu
ck conv
er
ter is pr
opo
sed
to
ob
tain
o
u
t
p
u
t
voltag
e
wh
ich
is l
o
wer th
an
t
h
e
p
eak
value
of input voltage
for SR
M driv
e a
pplic
ations [9]. Recently
m
a
ny
researches a
r
e going
on to
overcom
e
the problem
s
a
ssociated
with efficien
cy
an
d
t
o
r
que
ri
p
p
l
e
s of SR
M
d
r
i
v
es
. For exam
ple, Krishna
n
et al. [3]
pr
o
pose
d
a
ne
w l
o
w cost
c
o
nve
rt
er
wi
t
h
a
dum
p resi
st
anc
e
. In t
h
i
s
t
y
pe of c
o
n
v
e
r
t
e
r, t
h
e v
o
l
t
a
ge ac
r
o
ss t
h
e
capaci
t
o
r
de
pe
nds
o
n
d
u
m
p
r
e
si
st
ance an
d i
t
uses si
ngl
e
s
w
i
t
c
h at
eac
h
pha
se [
7
]
.
B
u
t
t
h
e m
a
jor
dra
w
back
i
s
pha
se inductance energy gets
wasted in dum
p resistan
ce
and it causes low efficiency. Bagheria
n
et
al. [1]
propose
d
a ne
w c-dum
p
converter
for SRM drive. T
h
is
conve
r
ter em
ploys capacitor i
n
series with
th
e b
i
filar
w
i
nd
ing
s
and en
erg
y
d
i
schar
g
e is
faster wh
en
co
m
p
ared
to
co
nv
entio
n
a
l b
i
filar typ
e
co
nv
erters. Th
e
d
i
sadv
an
tag
e
o
f
th
is co
nv
erter is th
at th
e u
s
e of larg
e
v
a
lu
e cap
acitor and
in
du
ctor in
th
e d
u
m
p
circu
it
in
creases th
e vo
ltag
e
rating
twice th
e b
u
s
vo
ltag
e
. Th
e
mo
n
itoring
and
co
n
t
ro
l of du
mp
cap
acitor v
o
l
tag
e
in
t
h
i
s
t
y
pe of co
nve
rt
er i
s
al
so di
ffi
c
u
l
t
.
Jae –
W
o
n
Ya
n
g
et
al
. [3]
pr
op
ose
d
a bri
d
gel
e
ss
SEPIC
co
n
v
ert
e
r wi
t
h
red
u
ce
d i
n
put
cur
r
e
n
t
ri
p
p
l
e
. The
m
a
jor
di
f
f
ere
n
ce
b
e
t
w
een t
h
i
s
c
o
n
v
e
r
t
e
r a
nd
pre
v
i
o
usl
y
ex
pl
ai
ned
co
nv
er
ter
s
is t
h
at it h
a
s no
i
n
pu
t br
idg
e
d
i
od
e. So
, it
p
r
o
d
u
c
es r
e
d
u
c
ed
con
d
u
c
tio
n lo
sses an
d pow
er
f
actor
can
be i
m
prove
d
com
p
ared t
o
con
v
e
n
t
i
onal
c
o
n
v
e
r
t
e
rs. T
h
e
refe
rence
[
1
0
-
1
3
]
o
ffe
rs a
vari
ous
SR
M
dri
v
e
t
o
p
o
l
o
gi
es t
o
ove
rc
om
e t
h
e t
o
r
que
ri
p
p
l
e
pr
o
b
l
e
m
s
and
im
pro
v
e t
h
e
p
e
rf
orm
a
nce o
f
d
r
i
v
e.
I
n
Fi
g
u
re
1
,
a
b
r
i
d
g
e
less SEPIC co
nv
erter
with
ri
pp
le-free in
pu
t cu
rr
en
t
is propo
sed in
[2
] is sh
own
.
Here, an
aux
iliary
circu
it con
s
ists o
f
i
n
pu
t indu
ctor and
capacito
r to
reduce th
e in
pu
t cu
rren
t
ripp
le.
In
g
e
neral, cou
p
l
ed
in
du
ctor
s ar
e
used
t
o
m
i
n
i
miz
e
th
e inpu
t cu
rren
t
ri
p
p
l
e
[2
].
Fi
gu
re
1.
Pr
o
p
o
se
d
bri
d
gel
e
ss
SEP
I
C
c
o
n
v
er
t
e
r
2.
ANALYSIS OF THE BRID
GELESS SEP
I
C
CO
NVE
R
TER
Th
e au
x
iliary circu
it con
s
ists o
f
N
s
as an
ad
d
ition
a
l windin
g
o
f
t
h
e inpu
t in
du
ctor
L
c
, an
aux
iliary
in
du
ctor
L
s
and a capacitor
C
a
. The
L
c
as a
coupled i
n
duct
or ca
n be e
xhi
bited as a m
a
gnetizing inductance
L
m
an
d turn
s ratio of th
e id
eal t
r
an
sform
e
r is
1:
⁄
. F
i
gu
re
2(
b)
s
h
o
w
s t
h
e
pr
o
pose
d
gat
e
si
g
n
al
s
fo
r
th
e sw
itch
e
s. O
n
e sw
itch
is
co
n
tinuo
usly t
u
rn
ed
ON
and
cu
rr
en
t thr
ough
th
e in
tr
i
n
sic b
o
d
y
d
i
o
d
e
is fo
r
c
ed
t
o
ru
n vi
a c
h
an
ne
l
of t
h
e s
w
i
t
c
h.
So, t
h
e c
o
nd
u
c
t
i
on l
o
ss
o
n
t
h
e swi
t
c
h ca
n
be re
duc
ed a
n
d
im
prove
d e
ffi
ci
ency
.
The
value
of t
h
e ca
pacitance
C
a
i
s
assum
e
d t
o
be
hi
gh
a
n
d
d
u
r
i
n
g s
w
i
t
c
hi
n
g
peri
od
V
Ca
is conside
r
ed as
vol
t
a
ge
s
o
u
r
ce
. B
y
v
o
l
t
-
seco
nd
bal
a
nce l
a
w,
u
nde
r st
ea
dy state the a
v
era
g
e i
n
duct
or
vo
ltag
e
is zer
o
and
avera
g
e ca
pacitor voltage
V
ca
is eq
u
a
l to
the in
pu
t v
o
ltage
V
in
du
ri
n
g
sw
i
t
c
hi
ng
peri
od
.
Li
kewi
se, a
v
e
r
age
cap
acito
r vo
ltag
e
V
C1
is eq
ual to
th
e inpu
t vo
ltag
e
V
in
. T
h
e
diodes
D
1
and
D
2
act as in
pu
t rectifiers. The
in
tr
in
sic bod
y d
i
od
es
D
S1
an
d
D
S2
o
f
th
e switch
e
s
S
1
an
d
S
2
si
m
u
ltan
e
o
u
s
ly
g
e
ts op
erated
by th
e g
a
te sig
n
als as
sho
w
n i
n
Fi
gu
r
e
2
(
b
)
.
The
co
m
ponent
s s
u
c
h
as
C
1
,
L
1
,
D
o
,
C
o
are sam
e
as that of c
o
nve
n
tional c
o
nve
r
ter.
The o
p
e
r
at
i
on
of t
h
e c
o
nve
rt
e
r
i
s
sim
i
l
a
r i
n
bot
h hal
f
cy
cl
es of t
h
e i
n
put
vol
t
a
ge
. S
o
, i
t
i
s
suf
f
i
c
i
e
nt
to
an
alyze th
e
p
o
s
itiv
e
h
a
lf cycle o
f
th
e i
n
pu
t vo
ltag
e
d
u
ri
n
g
on
e switch
i
n
g
p
e
riod
. Befo
re t
h
e m
a
in
switch
get
s
t
u
rne
d
O
N
,
t
h
e out
put
d
i
ode
D
o
i
s
i
n
O
FF m
ode
du
ri
n
g
di
sco
n
t
i
n
uo
u
s
co
nd
uct
i
o
n
m
ode (DC
M
)
.
In
o
r
de
r
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PED
S
I
S
SN
:
208
8-8
6
9
4
A Mod
ified
Brid
g
e
less Con
verter fo
r
S
R
M
Drive with
Redu
ced
Ri
p
p
l
e C
u
rren
t
(
C
. Ma
hes
w
ari
)
36
4
to
co
n
s
i
d
er th
e ou
tpu
t
v
o
ltage
V
o
as a
co
nst
a
nt
, t
h
e
val
u
e
of
o
u
t
p
ut
ca
pa
ci
t
o
r
C
o
is consid
ered
as ad
eq
u
a
tely
larg
e. Du
ri
n
g
th
e switch
i
ng
period
T
s
,
t
h
e i
n
put
v
o
l
t
a
ge i
s
a
ssum
e
d t
o
be c
onst
a
nt
whi
c
h i
s
eq
ual
t
o
V
in
.
Figu
re
2.
(a
)
G
a
te dri
v
e sig
n
al
s f
o
r
S
1
an
d S
2
(b
)
P
r
o
p
o
se
d g
a
te
signals f
o
r S
1
and S
2
Fig
u
r
e
3
.
W
a
vef
o
r
m
s o
f
th
e Pr
opo
sed Conv
er
ter
The
wave
f
o
rm
of t
h
e
pr
op
os
ed sy
st
em
i
s
sho
w
n i
n
t
h
e F
i
gu
re 3
.
H
e
re,
t
h
e m
a
gnet
i
z
i
ng c
u
r
r
ent
i
m
vari
es
fr
om
t
h
e
m
a
xim
u
m
val
u
e o
f
I
m1
t
o
th
e
mi
n
i
mu
m v
a
l
u
e
o
f
I
m2
a
n
d also t
h
e inductor curre
nt
i
s
vari
es
fr
om
t
h
e m
a
xim
u
m
val
u
e of
I
s1
t
o
th
e
mi
n
i
mu
m v
a
l
u
e
o
f
-I
s2
. At
one
s
w
i
t
c
hi
ng
pe
ri
o
d
T
s
, th
e op
eration
o
f
th
e
pr
o
pose
d
c
o
n
v
e
rt
er can
be
d
i
vi
ded i
n
t
o
t
h
r
ee
m
odes
of
ope
rat
i
o
n. T
h
e
vari
ous
o
p
era
t
i
ng m
odes o
f
t
h
e
co
nv
erter
are sh
own
in
th
e Fig
u
re 4
.
Th
e
switch
S
1
a
n
d
di
o
d
e
D
o
is tu
rn
ed
OFF
an
d th
e
switch
S
2
is
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
088
-86
94
I
J
PED
S
Vo
l. 6,
No
.
2,
Ju
ne 20
15
:
362
–
3
69
36
5
conducting be
fore
the i
n
stant
T
0
. T
h
e s
u
m
of
freewheeling c
u
rrents
I
s2
and
I
L2
g
i
v
e
s
th
e v
a
lu
e of
the
in
pu
t
current.
3.
M
O
D
E
S OF OPERA
T
ION
OF SEPIC
CONV
ER
TER
Mo
de 1
[
t
0
, t
1
]:
I
n
Fi
gu
re
4(a
)
, s
w
i
t
c
h
S
1
is
tu
rn
ed
ON an
d switch
S
2
is st
ill co
n
d
u
c
ting
at th
e ti
m
e
in
stan
t
t
0
. Th
e
mag
n
e
tizin
g cu
rren
t
i
m
i
n
c
r
e
a
s
e
s
f
r
o
mi
t
s
mi
n
i
mu
m v
a
l
u
e o
f
I
m2
lin
early
wi
th
sl
o
p
e
o
f
due to
th
e vo
ltag
e
v
p
across
m
a
gnet
i
z
i
ng i
n
d
u
ct
a
n
ce
i
s
V
in
.
Fi
gu
re 4(a
)
.
O
p
erat
i
o
n of
M
o
de 1
Th
e vo
ltag
e
V
Ls
across
L
s
is
1
and the
r
efore, the c
u
rrent
i
s
increases
from
its
m
i
nim
u
m
value
-
I
s2
lin
early with
a
slo
p
e
of
1
⁄
.
Mo
de 2 [
t
1
, t
2
]:
In Fi
gu
re 4
(
b
)
, switch
S
1
is tu
rn
ed
ON and
switch
S
2
is still co
n
d
u
c
ting
at th
e ti
me in
sta
n
t
t
1
.
Th
e m
a
g
n
e
tizin
g cu
rren
t
i
m
decreases
from
its minim
u
m
value
of
I
m1
linearly with slop
e
o
f
d
u
e
to
th
e
vol
t
a
ge
v
p
across m
a
g
n
e
tizin
g in
du
ctan
ce is
-V
o
.
Th
e vo
ltag
e
V
Ls
across
L
s
is
1
an
d th
er
e
f
or
e
,
th
e cu
rr
e
n
t
i
s
decrease
s
fr
om
i
t
s
m
a
xim
u
m
val
u
e
I
s1
lin
early with
a
slo
p
e
of
1
⁄
.
Fi
gu
re 4(
b
)
. O
p
erat
i
o
n of
M
o
de 2
Mo
de 3 [t
2
, t
0
1
]:
In Fi
gure
4(c), t
h
e c
u
rrent
i
Do
becom
e
s zero a
n
d the
di
ode D
o
is t
u
rne
d
OFF at the i
n
st
ant
t
2
.
The
input
current
i
in
i
s
t
h
e
s
u
m
of f
r
ee
whee
l
i
ng c
u
rre
nt
s
I
s2
and
I
L2
.
T
h
e i
n
p
u
t
c
u
rre
nt
i
s
gi
ven
as
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PED
S
I
S
SN
:
208
8-8
6
9
4
A Mod
ified
Brid
g
e
less Con
verter fo
r
S
R
M
Drive with
Redu
ced
Ri
p
p
l
e C
u
rren
t
(
C
. Ma
hes
w
ari
)
36
6
Fi
gu
re 4(c
)
.
O
p
erat
i
o
n of
M
o
de 3
4.
DESIG
N
V
A
L
UES
The p
r
o
p
o
se
d con
v
e
r
t
e
r i
s
si
m
u
l
a
t
e
d by
usi
ng M
A
TLAB
with the specifications and param
e
ters as
fo
llows:
v
in
=130 V
ac
, f
L
=60 H
z
,
f
sw
= 100
k
H
z,
D
= 0.25,
L
m
= 60
0
μ
H,
n
= 0.7,
L
s
= 127
μ
H,
L
1
= 63
μ
H,
C
a
=
0.
3
μ
F,
C
1
= 440
μ
F,
C
o
= 88
0
μ
F, a
n
d
R
L
= 77
Ω
.
5.
R
E
SU
LTS AN
D ANA
LY
SIS
Th
e
Figu
r
e
5
sh
ow
s th
e
Sim
u
l
i
n
k
m
o
d
e
l
of
co
nv
en
tio
nal SEPI
C
conv
er
ter. Th
e
outp
u
t
f
r
o
m
th
e
SEPIC is g
i
v
e
n as an
inpu
t to
SRM after i
n
verted
b
y
inv
e
rt
er.
Fi
gu
re 5.
Si
m
u
l
i
nk
M
odel
of
C
o
n
v
e
n
t
i
onal
SEPIC
The Fi
g
u
re
6
sho
w
s t
h
e
out
put
wa
ve
fo
rm
of c
o
n
v
e
n
t
i
ona
l
sy
st
em
. It
depi
ct
s t
h
at
t
h
e cur
r
ent
an
d
to
rq
u
e
r
i
pp
le pr
odu
ced
is m
o
r
e
. So
, th
e
p
e
rf
or
m
a
n
ce o
f
the
m
o
to
r is g
r
eatly affected
b
y
th
e co
nv
erter. Th
e
i
n
p
u
t
v
o
l
t
a
ge c
onsi
s
t
s
of m
o
r
e
ri
p
p
l
e
cur
r
e
n
t
due t
o
t
h
e p
r
esence
of a
n
i
n
put
bri
dge
di
o
d
e at
t
h
e SE
PI
C
.
The
g
a
te pu
lses
from
th
e pu
lse
g
e
n
e
rat
o
r are
u
s
ed
to trig
g
e
r th
e MOSFET. The tu
rn
ON an
d
tu
rn
OFF ti
m
e
o
f
th
e
M
O
SFET e
n
a
b
l
e
s t
h
e i
nduct
o
r L t
o
char
ge a
nd
di
scha
rge
.
The o
u
t
p
ut
i
s
di
spl
a
y
e
d t
a
ki
n
g
fl
ux
, t
o
r
que
, cur
r
ent
wi
t
h
re
fere
nce
t
o
t
i
m
e
. The
out
put
wa
vef
o
rm
im
p
l
i
e
s t
h
at
m
o
re cu
rre
nt
and
t
o
r
q
ue ri
ppl
e
pr
o
duce
d
du
ri
n
g
si
m
u
latio
n
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
088
-86
94
I
J
PED
S
Vo
l. 6,
No
.
2,
Ju
ne 20
15
:
362
–
3
69
36
7
Fi
gu
re
6.
O
u
t
p
ut
W
a
ve
fo
rm
of C
o
n
v
ent
i
o
nal
SEP
I
C
Th
e sim
u
lin
k
m
o
d
e
l o
f
a p
r
o
p
o
s
ed
bridg
e
l
e
ss SEPIC conv
erter is sh
own
in
th
e Fi
g
u
re 7
.
In
itially,
AC vo
ltag
e
sou
r
ce is used as
in
pu
t.
Fi
gu
re
7.
Si
m
u
l
i
nk M
odel
of
Pro
p
o
se
d B
r
i
d
gel
e
ss S
E
PIC
C
o
n
v
ert
e
r
Th
is AC
vo
ltag
e
so
urce is giv
e
n
to
t
h
e
b
r
i
d
g
e
less
SEPIC
co
nv
erter to
p
r
od
u
ce
DC with
redu
ced
ripp
le curren
t
,
wh
ich
is
g
i
v
e
n
to
SRM after co
nv
ertin
g in
to
AC b
y
an inv
e
rter.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PED
S
I
S
SN
:
208
8-8
6
9
4
A Mod
ified
Brid
g
e
less Con
verter fo
r
S
R
M
Drive with
Redu
ced
Ri
p
p
l
e C
u
rren
t
(
C
. Ma
hes
w
ari
)
36
8
Fi
gu
re
8.
O
u
t
p
ut
W
a
ve
fo
rm
of P
r
o
p
o
sed
B
r
i
dgel
e
ss
SE
PIC
The
out
put
w
a
vef
o
rm
im
pl
i
e
s t
h
at
cur
r
e
n
t
and t
o
r
q
ue ri
p
p
l
e
p
r
o
d
u
ces i
s
red
u
ce
d d
u
ri
ng si
m
u
l
a
t
i
o
n
com
p
ared t
o
c
o
n
v
e
n
t
i
onal
sy
st
em
i
s
sho
w
n
i
n
t
h
e
Fi
g
u
re
8. T
h
e
o
u
t
p
ut
s
are
di
spl
a
y
e
d
t
a
ki
ng
fl
ux
, cu
rre
nt
,
to
rq
u
e
and
sp
eed
with
reference to
tim
e.
Fig
u
r
e
9
.
Model o
f
Prop
osed
Br
id
g
e
less SEPI
C Conv
er
ter
The s
u
b
s
y
s
t
e
m
m
odel
o
f
p
r
op
ose
d
b
r
i
d
gel
e
s
s
SEPIC
c
o
nve
rt
er i
s
sh
o
w
n i
n
t
h
e Fi
gu
re
9.
The
out
pu
t
of c
o
n
v
e
n
t
i
ona
l
and t
h
e
pr
op
o
s
ed b
r
i
d
gel
e
ss
SEPIC
c
o
n
v
e
r
t
e
r are gi
ven a
n
d t
h
e re
d
u
ced
out
put
c
u
r
r
ent
ri
p
p
l
e
i
s
al
so s
h
ow
n i
n
t
h
e
wa
ve
fo
r
m
.
6.
CO
NCL
USI
O
N
The
pr
o
pose
d
m
e
t
hod
uses
hal
f
-
b
ri
d
g
e s
w
i
t
c
h m
odul
es
whi
c
h i
s
m
o
re com
p
act
and
has
hi
g
h
er
u
tilizatio
n
o
f
p
o
wer switch
e
s an
d
lower co
st, withou
t d
e
grad
ing
in
p
e
rform
a
n
ce. By e
m
p
l
o
y
in
g
th
is
bri
dgel
e
ss S
E
P
I
C
con
v
e
r
t
e
r, t
h
e ri
p
p
les can
b
e
greatly redu
ced
with
im
p
r
o
v
e
d
pe
rf
orm
a
nce. A c
o
m
p
ari
s
o
n
bet
w
ee
n t
h
e p
r
o
p
o
sed t
o
p
o
l
o
gy
and t
h
e co
nve
nt
i
o
nal
SE
PIC
co
nve
rt
er
sho
w
s t
h
at
t
h
e com
ponent
cur
r
ent
ri
p
p
l
e
s are
m
u
ch l
o
we
r i
n
t
h
e prese
n
t
e
d t
o
pol
ogy
. I
n
l
o
w-
vol
t
a
ge hi
g
h
-c
ur
re
nt
appl
i
cat
i
ons, t
h
e p
r
op
ose
d
to
po
log
y
can
be
m
o
r
e
b
e
n
e
f
i
cial th
an
a conven
tio
n
a
l SEPIC co
nv
er
ter
.
Th
u
s
, th
e sim
u
latio
n
and
its ou
tpu
t
s
have
s
h
o
w
n
t
h
at
, t
h
e
out
put
h
a
s a t
e
n
d
e
n
cy
of i
m
pro
v
e
d
p
e
rf
orm
a
nce wi
t
h
r
e
d
u
ce
d t
o
rq
ue
ri
p
p
l
e
s t
h
ro
ug
h
out
its o
p
e
ration
.
Th
e th
eoretical an
alysis and
si
m
u
la
tio
n
resu
lt
s were
p
r
ov
id
ed
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN
:
2
088
-86
94
I
J
PED
S
Vo
l. 6,
No
.
2,
Ju
ne 20
15
:
362
–
3
69
36
9
REFERE
NC
ES
[1]
H.
Bagherian,
et al.,
“A New C-Dump Conv
erte
r for
Bifilar
Winding Switched Reluctance Motor”,
IE
EE
Conference, Po
wer Electr
onics,
Drive Systems a
nd
Technolog
ies
Conferen
ce,
No
v. 2011
.
[2]
Jae-Won Yang, et al., “Bridgeless
SEPIC Conv
erter with a Rip
p
le-Free Input
Current”,
IEEE Transactions on
Power
E
l
ec
tr
oni
cs
,
Vol. 28
, No.
7, July
2013
.
[3]
R. Krishnan, et
al., “Ana
ly
sis an
d Design of
a
Low Cost Conver
t
er
for
Switched
Relu
ctan
ce Motor Drives”,
IEEE
Trans. Ind.Electron.,
Vol. 29
, N
o
. 2
,
pp
. 320–32
7, Sep
2009.
[4]
H.J
.
Brauer, e
t
al., “
C
ontrol
F
o
r P
o
ly
ph
as
e S
w
itched Relu
c
t
anc
e
M
achines
to M
i
nim
i
ze Torque Rippl
e and
Decreas
e
Ohm
i
c
M
achin
e
Los
s
e
s
”
,
I
E
EE Trans. Power Electronics,
Vol. 27
, No. 1,
pp. 370–378
, Jan. 2012
.
[5]
Malligunta Kiran Kumar, et al., “Ope
n Loop an
d Closed Loop
Performance of
Switched Reluctance Motor
with
Various Converter Topo
logies”,
International Jo
urnal for Pow
e
r
Electronics an
d
Drives System
,
Vol. 5, No.
1,
ISSN: 2088-8694.
[6]
W.M. Da Silva,
et al
., “A New Three Phase Full-
bridge C-dump
Conve
rter
Applied to Switched
Reluctance Motor
Drives
”,
IEE
E
C
onfer
enc
e
,
Powe
r
Ele
c
tr
onics
Sp
ecia
lis
ts
Conf
er
e
n
ce
, PESC’05, R
ecif
e
, June 2005
.
[7]
Younghoon Cho
,
et al., “A Low Cost Single-
Switch Bridgeless Boost PFC
Con
v
erter
”
,
International Journal fo
r
Power Electronics
and Drives System
, Vol. 4
,
No. 2, Jun 2014.
[8]
I. Husain,
et a
l
.
,
“
M
inim
ization
of Torque Ripp
l
e
in SRM Drives”,
IEEE Trans. Ind. Electron
, Vol. 49, No
. 1, pp
.
28–39,Feb. 2002
.
[9]
R. Shenbagalaks
hmi, et
al., “Clo
sed Loop Contr
o
l of Soft Sw
itched Inter
l
eaved
Buck Converter
”,
International
Journal for
Pow
e
r Electr
onics a
nd Drives S
y
stem
, Vol. 2, No. 3
,
Sep. 2012.
[10]
W.Y. Choi, et al., “Bridgeless Boost Rectif
ier with Lo
w Conduction Losses and Reduced
Diode
Reverse Recover
y
Problems”,
IEEE Trans. Ind. Electron,
Vol. 54,
No. 2,
pp. 769–7
80, Apr. 2007.
[11]
D.H. Le
e,
et a
l
.
,
“
A
S
i
m
p
le Nonlinear Log
i
ca
l Tor
que Sharing Function for
Low Torque Ripple SRM Drive”,
IE
EE
Trans. Ind.Electron
, Vol. 56, No. 8
,
pp
. 3021–30
28, Aug. 2009.
[12]
Huber L, et al
.,
“
P
erform
ance Evalu
a
tion of Bridgel
e
s
s
P
F
C
Boos
t Rectifi
e
rs
”,
IEEE T
r
ans. Power Electroni
c
s
,
Vol. 23
, No. 3, p
p
. 1381–1390
,
May
2008.
[13]
X.D.
Xue, et al
.
,
“
O
ptim
izat
ion a
nd Evaluation
of Torque-Shar
i
ng Functions
fo
r Torque R
i
pple Minimization in
Switched R
e
luc
t
ance
Motor Driv
es”,
IEEE Trans. Power
Electron,
Vol. 24, No. 9
,
pp. 2076–2090
,
Sep. 2009
.
BIOGRAP
HI
ES OF
AUTH
ORS
C.
Mahes
w
ari
obtain
e
d her B.E degree from
Bannari A
m
m
a
n Institute of Technolog
y
,
Erode
and M.E degree from
Annamalai University
,
I
ndia and She has around 11 y
ears ofteaching
Experience
and
pursuing part time Ph.D. in Anna
Univerit
y.
S
h
e is
curren
t
l
y
working as
an
Assistant Professor in Dr. N.G.
P. Institut
e
of
Techno
log
y
, Co
im
batore, Ind
i
a
.
Her resear
ch
inter
e
sts inc
l
ude
invert
ers and
spe
c
ia
l e
l
e
c
tri
cal
m
achin
es.
Rani Thottu
ng
al
obtain
e
d her B.E and M.E degree fromAndhra University
, In
diaand her Ph.D
degree f
r
om Bharath
i
ar Univ
ersity
, India. Sh
e h
a
s around 20
y
e
ars of teaching Experien
ce. She
is currently
wor
k
ing as Professo
r in Kumaraguru
colleg
e
of T
echn
o
log
y
, Indi
a. S
h
e is
m
e
m
b
er of
IS
TE and
IE
. He
r res
e
arch
int
e
re
s
t
s
includ
e powe
r
s
y
s
t
em
and F
A
CTS
.
A.
C.
Divy
a
graduated h
e
r B.E.
from SNS College of
Technolog
y
,
Coimbatore and iscurren
tly
pursuing her
M.
E.
at
Dr. N
.
G.P.
Institute
of
Te
ch
nolog
y, Co
im
bat
o
re.
Evaluation Warning : The document was created with Spire.PDF for Python.