Internati
o
nal
Journal of P
o
wer Elect
roni
cs an
d
Drive
S
y
ste
m
(I
JPE
D
S)
V
o
l.
6, N
o
. 3
,
Sep
t
em
b
e
r
2015
, pp
. 58
6
~
59
3
I
S
SN
: 208
8-8
6
9
4
5
86
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
Experimental Study of the Boost Converter under Current
Mode Control
D
j
a
m
a
l
Go
zi
m*
, Ka
mel Gu
esmi**
, Djilali
Ma
hi
*
*
*
* Departement o
f
Scien
ces
and
Technol
og
y
,
Univ
ersity
of
Djelfa,
Algeria
** CReS
T
IC–Re
i
m
s
Univers
i
t
y
,
F
r
ance
**
*
Univ
ersity
Amar Telid
ji Laghouat, Alger
i
a
Article Info
A
B
STRAC
T
Article histo
r
y:
Received Feb 12, 2015
Rev
i
sed
Ju
l 16
,
20
15
Accepte
d
J
u
l 29, 2015
This paper presents the
practical analy
s
is of B
oost converter
operating in
continuous
cond
uction mode un
der curr
en
t contr
o
l. We start b
y
theconver
t
er
m
odeling, then
experim
e
nt
al res
u
lts will be exp
o
sed where we propose an
experimental cir
c
uit, to stud
y
the in
fluen
ce of
the variation of differen
t
circu
it p
a
ram
e
t
e
rs
s
u
ch as
r
e
fere
nce
curren
t
,
inp
u
t volt
a
ge
and
l
o
ad. W
e
als
o
anal
yz
e th
e con
t
rol te
chnique p
e
rform
ances
.
Th
e experim
e
n
t
al
res
u
lts
are
given and interp
reted
in
ea
ch cas
e.
Keyword:
B
e
havi
ou
rs
Ex
peri
m
e
nt
al
C
M
C
of B
o
ost
Co
nv
erter
Po
wer C
o
nve
rt
ers
St
udy
o
f
DC
D
C
co
nve
rt
er
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
:
Djam
al Gozim,
Depa
rt
m
e
nt
of
Sci
e
nces a
n
d T
echn
o
l
o
gy
University
of Djelfa,
Algeria
.
Cite 5
Ju
illet Bp
9
6
5
/
17
007
,
Dj
el
fa-Alg
eria
Em
a
il: g
o
z
i
m
a
n
sour@g
m
a
il.c
o
m
1.
INTRODUCTION
The expe
rim
e
ntal study of the DC
DC
c
o
n
v
e
r
t
e
rs i
m
prove t
h
at
t
h
ey
are su
ffe
ri
n
g
f
r
om
ri
ppl
e
hy
st
eresi
s
. M
a
ny
w
o
rks
are
f
o
cu
sed
o
n
t
h
e i
l
l
u
m
i
nat
i
on
of
the current- ri
pple hyster
esi
s
.
Ot
he
r e
x
peri
m
e
nt
al
wo
rk
s st
udi
e
d
t
h
e
n
onl
i
n
ea
r
p
h
en
om
eno
n
exhi
bi
t
e
d
by
DC
DC
co
n
v
e
r
t
e
rs s
u
c
h
as
peri
odi
ci
t
y
d
o
ubl
i
n
g,
Bifu
rcation
types, in
term
itten
c
y an
d ch
ao
s [1
], [2
],
[3
]
, [4
]
.
In
all switch
i
ng
conv
erters, t
h
e ind
u
cto
r
curren
t
is
related to
th
e
reference cu
rren
t and th
e circu
it
param
e
t
e
rs. T
o
obt
ai
n a
co
nst
a
nt
i
n
d
u
ct
o
r
c
u
r
r
ent
u
n
d
e
r
ci
rc
ui
t
s
para
m
e
t
e
rs vari
at
i
o
n
,
t
h
e s
o
l
u
t
i
o
n i
s
t
h
e
d
e
sign
o
f
circuit th
at au
to
m
a
t
i
cally
adjust the duty cycle as
necessa
ry to
o
b
t
a
i
n
t
h
e
desi
r
e
d i
n
d
u
ct
or
cu
rre
nt
,
th
ey are
so
m
e
wo
rk
s i
n
teressed
b
y
th
e tensio
n m
o
d
e
contro
l
o
f
DC
DC
con
v
e
rters to
track
d
e
sired
ou
tpu
t
vol
t
a
ge
, t
h
e
pa
per
[
5
]
use
d
t
h
e N
N
C
m
e
t
hod t
o
dec
r
easi
n
g
ove
rs
ho
ot
an
d re
d
u
ci
n
g
set
t
l
i
ng t
i
m
e i
n
t
h
e DC
-
DC
Fl
y
b
ack C
o
n
v
e
r
t
e
r, ot
her
w
i
s
e som
e
works
used a c
o
nt
r
o
l
m
e
t
hods
of DC
DC
co
nve
rt
ers t
o
fi
n
d
t
h
e
MPPT
o
f
th
e
PV
su
pp
ly [6
].
In
o
u
r case
we
pr
o
pose a
ne
w ex
pe
ri
m
e
nt
al
ci
rcui
t
t
o
st
u
d
y
t
h
e DC
DC
B
oost
c
o
n
v
e
r
t
e
r be
ha
vi
o
u
r
s
un
de
r ci
rc
ui
t
p
a
ram
e
t
e
rs vari
a
t
i
on a
n
d
t
o
i
m
pro
v
e
t
h
e efficiency of t
h
is type of c
o
nverte
rs
.
In
th
e
first sectio
n
we
p
r
esent th
e co
nv
erter an
d
its
m
o
d
e
l, th
en
sim
u
latio
n
and
exp
e
rimen
t
al resu
lts will b
e
ex
po
sed
in
th
e seco
nd
section
.
In
th
e last
p
a
rt we
present th
e o
b
t
ain
e
d
ex
p
e
rim
e
n
t
al resu
lts in
th
e case of
B
oost
pa
ram
e
ters
vari
at
i
o
n a
n
d
we
anal
y
ze
t
h
e co
nt
r
o
l
t
e
c
hni
que
pe
rf
o
r
m
a
nces.
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
. 3, Sep
t
em
b
e
r
2
015
:
58
6 – 593
58
7
2.
CO
NVE
RTER DESC
RIPT
ION
We ch
oo
se t
h
e cu
rren
t m
o
d
e
con
t
ro
l (CC
M
) as
o
p
e
ratin
g m
o
d
e
, in th
is con
t
ro
l m
o
d
e
is
we can
cont
rol
bot
h t
h
e sl
ow a
n
d fat
dy
nam
i
cs of t
h
e sy
st
em
[7]
,
[
8
]
.
The B
o
ost
con
v
e
r
t
e
r i
s
o
p
e
rat
i
ng i
n
co
nt
i
nues
con
d
u
ct
i
on m
ode w
h
en t
h
e
c
u
rre
nt
t
h
ro
u
gh t
h
e
i
n
d
u
ct
o
r
L
neve
r fal
l
s
t
o
z
e
ro
(
()
0
L
it
). In this case we ha
ve
two
configu
r
at
io
n
s
related
t
o
th
e p
o
sitio
n
of th
e switch
s
w
. F
i
gu
re 1 sh
o
w
s t
h
e cur
r
ent
m
ode co
nt
r
o
l
of t
h
e
B
oost
c
o
nve
rt
e
r
.
L
r
g
V
R
S
VD
r
()
L
it
sw
C
s
w
r
0
()
ut
R
c
r
re
f
I
T
Cl
o
c
k
Q
L
Fig
u
re
1
.
Boo
s
t co
nv
erter
u
nder cu
rren
t m
o
de (sim
p
lified
version
)
If
T
is th
e cl
o
c
k
cycle, th
e d
w
ells ti
m
e
s in
th
e two
co
nfigu
r
ation
s
are resp
ectiv
el
y
1
td
T
and
'
2
(1
)
td
T
d
T
and the
duty cycle
1
dt
T
i
s
gi
ven
by
[
9
]
:
()
(
)
()
l
n
()
(
)
in
L
s
w
L
L
s
w
i
n
L
sw
ref
Vr
r
i
n
L
dn
Tr
r
V
r
r
I
(1
)
The system
sta
t
e is expresse
d
as:
ii
i
i
x
Ax
B
U
(2
)
with
i
A
,
B
i
t
h
e st
ate
m
a
trices in
the
i
th
co
nfi
g
u
r
ation.
1
1
0
()
,
0
LS
W
CR
r
c
A
rr
L
2
1
()
()
,
()
CC
C
LV
D
C
C
R
CR
r
C
R
r
A
Rr
rr
Rr
R
LR
r
L
1,
2
1
0
t
B
L
(3
)
The state is
[]
t
cL
x
vi
(
c
v
: voltage
across
capacitor,
L
i
: inductor
cu
rr
e
n
t)
The state ca
n
be expressed by
:
0
()
11
0
()
(
(
)
)
i
At
t
ii
i
i
g
i
i
g
X
te
X
t
A
B
V
A
B
V
(4
)
The sy
stem
m
odel is
o
b
taine
d
usin
g
(4
) t
o
descri
be th
e c
o
nve
rter
be
ha
vior
in eac
h c
o
nf
igu
r
ation
an
d
using the state final val
u
e of the actual configuration,
as i
n
itial value for the ne
xt confi
g
uration and so on
until obtaini
n
g
the system
respon
se duri
ng the
whole tim
e
rang.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
S
SN:
208
8-8
6
9
4
Experime
ntal
S
t
udy
of the
B
o
o
s
t C
onve
r
ter u
nde
r C
u
r
r
ent
Mo
de C
o
ntr
o
l
(Djamal Gozim)
58
8
3.
PR
OPOSED
EX
PER
I
M
E
NTA
L
CIRC
UIT OF
BOOST CONV
ER
TER
UN
DER
C
URR
ENT
MO
DE CO
N
T
ROL
As
pres
ente
d i
n
Fi
gu
re
2.
We
use
d
t
w
o
o
p
er
ationa
l
am
plifi
e
rs TL084 to
obta
in the error
between t
h
e
feed
bac
k
cu
rre
nt an
d the
re
fe
rence c
u
rre
nt.
After t
h
at we
p
a
ss by
P
I
c
ontr
o
ller,
whe
r
e th
e co
ntrol si
gna
l
m
u
st
be com
p
ared
with the triang
ular sig
n
al that can be pr
od
uc
ed by
th
e ICL8038 circuit to obtain the duty cycle
applied on t
h
e
switch.
D
3
k
+
-
+
-
+
-
+
-
+
-
-
+
-1
2
V
+1
2
V
-1
2
V
-1
2
V
-12V
+
12V
+1
2
V
+
12V
+1
2
V
+1
2
V
B
C
1
07
L
i
V
84
0
IR
F
C
Lo
ad
R
0.
1
10
k
100
k
100
100
k
100
k
100
k
10
k
10
k
0.
1
f
10
k
10
k
out
V
F
B
I
erro
r
controller
PI
ref
I
current
ference
Re
-12V
Figu
re
2.
Ex
pe
rim
e
ntal B
oost co
nve
rter ci
rc
uit u
nde
r c
u
r
r
e
n
t m
ode co
ntr
o
l
Figu
re
3.
C
a
pt
ed P
h
oto
o
f
E
x
perim
e
ntal B
oost c
o
n
v
erte
r c
i
rcuit u
n
d
er
cu
rre
nt m
ode co
n
t
rol
3.
1.
Gener
a
ti
on
of
T
r
i
a
n
g
u
l
ar Si
g
n
al
We u
s
ed
th
e driv
er
I
C
L8
038
sh
own
in
Figu
re 4
to
ge
nerate
expe
rim
e
ntal
trian
gular si
gna
l where th
e
fre
que
ncy
is fi
xed at
10
kh
z
. The
values of pa
ram
e
ters of t
h
e IC
L8038 are calc
u
lated as fellow:
0.
33
f
RC
.
Hence
,
700
R
and
0.0
4
7
Cf
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN:
2
088
-86
94
I
J
PEDS
Vo
l.
6,
No
. 3,
Sep
t
em
b
e
r
2
015
:
58
6 – 593
58
9
Figu
re 4.
Tria
n
gula
r
sig
n
al ge
neratio
n by
IC
L8
03
8 with fre
que
ncy
10
kh
z
4.
RESULTS
A
N
D
DI
SC
US
S
I
ON
In bot
h
cases, the si
m
u
latio
n and the
experim
e
ntal
study, param
e
ters
are:
10
V
g
V
,
L1
m
H
,
R2
2
,
10
CF
,
l
r0
.
4
, an
d the
switchin
g
f
r
e
que
ncy
sw
f
1/
T
1
0
K
H
z
[10]
,
[1
1]
. We
d
o
com
p
arisons between
t
h
e results
obta
ine
d
by si
m
u
lation a
n
d those
obtained by t
h
e e
x
perim
e
ntal plant unde
r
the va
riation
of
refe
re
nce c
u
r
r
ent,
in
put
v
o
ltage a
n
d
the
load t
o
a
n
alyze the
used c
u
rrent m
ode c
ont
rol
per
f
o
r
m
a
nces.
4.
1.
Ori
g
i
n
al
B
o
os
t C
o
n
v
er
ter B
e
ha
vi
our
We can rem
a
rk, in Fi
gu
re 5
,
for
b
o
th cases
: sim
u
lation a
nd e
xpe
rim
e
ntal that the ind
u
cto
r
cu
rre
nt
follows the
reference c
u
rrent
1
ref
iA
, in the Figure
6 the val
u
e of
the
output volt
a
ge in the sim
u
lation a
n
d
expe
rim
e
ntal is
14
ou
t
VV
.
Figu
re
5.
Ex
pe
rim
e
ntal and Si
m
u
lation o
f
i
n
duct
o
r
cu
rre
nt
0
.
047
f
f
12
3
4
5
6
7
8
10
11
82
k
70
0
70
0
Triangular
s
igna
l
8038
I
CL
-
12V
+12V
Duty Cycle
d
Inductor C
u
rren
t
w
i
th
i
re
f
=1(A)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
S
SN:
208
8-8
6
9
4
Experime
ntal
S
t
udy
of the
B
o
o
s
t C
onve
r
ter u
nde
r C
u
r
r
ent
M
o
de C
o
ntr
o
l
(Djamal Gozim)
59
0
Figu
re
6.
Ex
pe
rim
e
ntal and
Si
m
u
lation
o
f
O
u
tput voltag
e
4.
2.
Vari
ati
o
n of Refere
nce Current
Figu
re
7.
Ex
pe
rim
e
ntal va
riation
o
f
refe
rence
cu
rre
nt
i
ref
We
rem
a
rk in
Figu
re
7 e
x
peri
m
e
ntal results t
h
at
whe
n
inc
r
e
a
se the
refe
re
nce curre
nt, t
h
e
duty cycle
(cha
nnel two) i
n
crease
to
obta
in an in
duct
o
r
current cl
ose t
o
the
re
fere
nce
.
O
u
t
p
u
t
V
o
lt
age
(V
)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th
i
re
f
=0.5(A)
Duty Cycle
d
Duty Cycle
d
Inductor C
u
rren
t
w
i
th
i
re
f
=2(A)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th
i
re
f
=3(A)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th
i
re
f
=4(A)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN:
2
088
-86
94
I
J
PEDS
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l.
6,
No
. 3,
Sep
t
em
b
e
r
2
015
:
58
6 – 593
59
1
4.
3.
V
a
ri
a
t
i
o
n
o
f
In
put
V
o
l
t
age
Figu
re
8.
Ex
pe
rim
e
ntal va
r
i
ati
o
n of
in
pu
t
v
o
l
tag
e
We rem
a
rk in Figu
re 8, that
whe
n
we
decre
a
ses
the input voltage the induct
or curre
n
t decreases, so
the duty cycle
(cha
nnel two) i
n
cr
ease
to
obta
in an induct
o
r
current cl
ose t
o
the
re
fere
nce
curre
nt.
4.
4.
V
a
ri
a
t
i
o
n
o
f
L
o
ad
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Input voltage
V
g
=3(V
)
Inductor C
u
rren
t
w
i
th Input voltage
V
g
=7(V
)
Duty Cycle
d
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Input voltage
V
g
=15(V
)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Load
R=15(
Ω
)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Load
R=46(
Ω
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
S
SN:
208
8-8
6
9
4
Experime
ntal
S
t
udy
of the
B
o
o
s
t C
onve
r
ter u
nde
r C
u
r
r
ent
M
o
de C
o
ntr
o
l
(Djamal Gozim)
59
2
Figu
re
9.
Ex
pe
rim
e
ntal variation
o
f
l
o
ad
We rem
a
rk in
Fig.9, that
whe
n
we i
n
crease t
h
e lo
a
d
the inductor curre
nt decreases, so the duty cycle
(cha
nnel two) i
n
crease
to
obta
in an
induct
o
r current follo
w
the
re
fere
nce.
5.
CO
NCL
USI
O
N
In this
pa
per a
n
ex
perim
e
ntal circuit of DC
-DC
c
o
nve
rter
un
de
r cur
r
e
n
t-
m
ode contr
o
l
is analy
s
ed.
The
obtained e
xpe
rim
e
ntal results we
re c
o
m
p
are
d
t
o
t
hose
of
sim
u
lation whic
h c
o
nfirm
s
the e
fficie
n
c
y
of
the
pr
o
pose
d
e
xpe
rim
e
ntal circu
it to study
th
e diffe
re
nt
be
havi
ors
o
f
the
B
oost c
o
n
v
e
r
ter u
n
d
er
dif
fre
nts
param
e
ters va
r
i
ationsuc
h as
t
h
e e
f
ere
n
ce c
u
rrent, the i
n
put
voltage
and t
h
e
load.
ACKNOWLE
DGE
M
ENTS
We tha
n
k o
u
r
colleagu
e
Pr
o
f
. D
r
.
Osam
a Ahm
e
d M
AHJ
O
U
B
f
r
om
Facu
lty
of En
ginee
r
in
g- C
a
ir
o
Uni
v
ersity (E
gypt)
who
provided insi
ght a
nd exper
tise that
greatly assisted this re
searc
h
work.
REFERE
NC
ES
[1]
J.R.G. Marr
ero,
J.M. Font
, G.C
.
Verghese, “Analy
sis of th
e Chao
ti
c Reg
i
me for D
C
-DC Converter
s under Current-
Mode Control”,
IEEE
1996
.
[2]
H. Lihong, J. Meimei, D. Zhong
wen,
W. Jianhua, “Chaos Control for th
e Boost Converter under Current-mode
Control”,
I
EEE
2010
.
[3]
X. Zhiy
u, X. W
e
isheng, Y. You
ling,
W. Qidi, “A Stud
y
on the
Stability
of Curr
ent-Mode Contr
o
l Using Time-
Delay
Model of
Pulse-Width-Modulator
”,
IEEE
2
010
.
[4]
N. A. Natsheh,
B. J.
Natalia, J.G. Kettleborough,
“Control of
chao
s in DC DC Boo
s
t conver
t
er
”,
IE
EE
2008
.
[5]
W.
M.
Utomo,
S.
S.
Yi,
Y
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Z.
A
.
Haron,
A. A.
Bak
a
r
and M.
Z. Ahmad, “Voltag
e
Tr
acking of
a DC-DC
Fly
b
ack Conv
erter Using Neur
al
Network Control”,
IJ
PE
DS
Vol.2
,
No.1
, Mar
c
h 2
012, pp
. 35~42
[6]
R.Anus
u
y
ad
evi,
P
.
S
u
res
h
P
a
ndiarajan
, J
.
M
u
ruga
Bharath
i
, “ Sliding Mode Controller
ba
se
d Ma
ximum
Powe
r Poi
n
t
Track
ing of
DC
to DC Boost Co
nverter
”,
IJ
PED
S
Vol.3
,
No.3
, S
e
ptember 201
3,
pp. 321~327
[7]
R.W. Erickson, D. Ma
ksimovic, “Fundamentals of Power Electron
i
c”,
kluwer Academic Pu
blishers, Boston
,
Dordrecht, Lond
on
, 1999
.
[8]
B. Soumitro, G.C. Verghese, “
N
onlinear
phen
o
mena in power electron
i
cs”,
Published b
y
Jo
hn Wiley
&
So
ns,
Hoboken,
NJ TK7881.15 B36 20
01
.
[9]
K. Guesmi, “ Co
ntribution
a la co
mmande
floue d
’
un Convertisseur statique”,
T
h
es
i
s
of U
R
CA
,
Rei
m
s
01-12-2006
[10]
Y.
S.
Ping,
K.
L. Yean,
Y.
C.
Chen,
K.
H.
Chen,
“C
urrent-Mode S
y
nthetic Con
t
r
o
l Technique fo
r High-Ef
fi
c
i
ency
DC–DC Boost Converters Ov
er
a Wide
Load R
a
n
g
e”,
Transaction
s
On Very Large Scale In
tegratio
n IEEE
2013
.
[11]
D. Cafagn
a, G
.
Grassi, “Expe
rimental stud
y
of
d
y
namic be
h
a
viors and routes
to
chaos in
DC DC Boost conver
t
ers”,
Elsevier, journal chaos
2005
.
[12]
M.K. Kazimierczuk, “Transfe
r Function of Current Modulator in
PWM
Converters with Current-Mode Control”,
Transactions on
Circuits and
Sys
t
ems IEEE
2010
.
[13]
L. Qingfeng
,
L. Zhaoxia, S. Jinkun,
W. Huamin, “A Co
mposite PWM
Cont
rol Strateg
y
for Boost Converter”,
Els
e
v
i
er
,
Phys
i
c
s
Pr
ocedia
2012.
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Load
R=76(
Ω
)
Duty Cycle
d
Inductor C
u
rren
t
w
i
th Load
R
=
1
16(
Ω
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
S
SN:
2
088
-86
94
I
J
PEDS
Vo
l.
6,
No
. 3,
Sep
t
em
b
e
r
2
015
:
58
6 – 593
59
3
BIOGRAP
HI
ES OF
AUTH
ORS
Djamal Goz
i
m
. Was born in Djelfa-Alg
eria, in
1980. He
receiv
ed a Magister fr
om poly
t
ecnical
m
iliter
y
s
c
hool
i
n
2006. H
e
is
a
Phd Student
in
Un
iversit
y
Am
ar
Telidj
i
-
Lagho
uat, Alger
i
a. He
works
in Univers
i
t
y
of Djelf
a
, Alger
i
a
,
F
acult
y of s
c
i
e
n
ces
and te
chn
o
log
y
, E-m
a
i
l
:
gozimansour@gmail.com.
Kamel
Guesmi
rec
e
ived
th
e B
E
ng degr
ee
in
Ele
c
tri
cal
Eng
i
n
eering
from
the
Universit
y
of
Djelfa, Algeria, in 2000, the MSc and Ph
D
de
grees in Electrical
Engin
eering from Reims
University
, Fran
ce, in
2003
and
2006, resp
ectively
.
Currentl
y
, h
e
i
s
a full Professor with the Depa
rtment
of Electrical Engineering
,
Djelf
a
Universit
y
, Alg
e
ria. His resear
ch inter
e
sts in
cl
ude intellig
ent
control
,
robust control
,
power
ele
c
troni
cs and
n
online
a
r d
y
nam
i
c
s. E-m
a
il:
g
u
es
m
i
01@
uni
v-
re
im
s.fr
Djillali Mahi
was born in Fr
enda, Alge
ria in
1959. He recei
ved the B.Sc
. degree from
the
School of Frend
a
, Algeria, in 19
78, the M
.
Sc. d
e
gree from University
of
scien
ces
and technolog
y
of Oran, Algeria in 1983 and the Ph.D. degree fr
om
Paul Sabatier University
, To
ulouse, France
in 1986.
Professor Mahi'
s
teaching
activitie
s involve
cours
e
s at th
e Bachelor
s, Masters,
an
d Ph.D. lev
e
l
s
at University
of
Laghouat, Alg
e
ria. To d
a
te, he
has given
a nu
mber of courses in the fields of
Ele
c
trom
agnet
i
c
Com
p
atibili
t
y
,
high voltag
e
en
gineer
ing, high
voltag
e
discharg
e ph
y
s
ics an
d
Insulating
Coord
i
nation
.
H
e
has
a
l
so been
Dire
ct
o
r
of th
e Masters
Program in Engineering
.
He is currently
director of st
ud
y and development of dielectric
s
and semiconductors laborator
y
.
His
res
earch is
in the field of Dielec
trics
M
a
ter
i
als, Flasho
ver of polluted
insulators and
Ele
c
trom
agnet
i
c
Com
p
atibili
t
y
.
E
-
mail:
d.m
a
hi@uni
v-la
gh
o
u
ate.dz
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