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8/18/2019 Mobile Phone to Mobile Phone Wireless Power Transfer
1/4
Mobile Phone to Mobile Phone Wireless Power Transfer
1Hasan Uz Zaman, 2Touhidul Islam, 3Kazi Shanjidul Hasan, 4Rifat Kamal Antora
D!artmnt of "l#tri#al and $om!utr "n%inrin%
&orth South Uni'rsit(, Dha)a, *an%ladsh
1hasan+zamannorthsouth+du, [email protected],3)azisouro'33-%mail+#om, 4rifat+antoranorthsouth+du
Abstract - Wireless power transfer (WPT) or wireless energy
transmission is the transmission of electrical power from
a power source to a consuming device without using solid
wires or conductors. In this paper we implemented the
concept of wireless power transfer technology to transmit
power from mobile phone to mobile phone. In our design we
used simple inductive coupling and basic electrical circuits to
serve our purpose.
Keywords- Wireless Power Transfer, OTG, Resonance, Inductive Couplin, Colpitts Oscillator, !oltae Reulator"
I+ Introdu#tion
.irlss /o0r Transfr t#hnolo%( has o!nd a 0indo0
to0ards a n0 r'olution+ It #han%d th %nral !r#!tion of
transfrrin% !o0r+ $ommonl( )no0n as ./T, this t#hnolo%(
#an as th 0a( of nr%( transmission 0idl(+ *a#) in 2, a
%rou! of IT studnts #am out 0ith this inno'ati' 0a( to
li%ht a . ul o'r t0o mtr distan# 0irlssl(+ This
amazd th #on#rnin% !o!l 0ith a ho! to us th old thoris
in a n0 0a(+ This nol #on#!t 0as far forsn ( th 56athr of .irlss5 &i#ola Tsla asd on Tsla Thor(, 0hi#h 0ould
transmit th l#tri#al nr%( a#ross a lar% distan# and r#i'
it at th dstination 0ith n%li%il losss+ . usd this #on#!t
to ma) an ffi#int !o0r transfr s(stm to transmit a lo0
'olta% !o0r o'r a short distan#+ . aim to #har% a !hon
0ith -7 nr%( transfrrd throu%h rsonatin% #oils from an 8n9
Th9:o ;8T:< su!!ortd !hon+ An 8T: su!!ortd !hon #an
dli'r -7 D$ out!ut 0hi#h 0 intnd to us to #har% anothr
!hon+
II+ Rlatd .or)s
"n%inrs ha' n dalin% to find ttr 0a(s of r#har%in%
moil !hons+ .ith th d'lo!mnt of modrn t#hnolo%is,
th( 0r al to in'nt a n0 0irlss #har%in% t#hni=u+ It
in#luds a 0irlss #har%in% !ad 0hi#h 0ill r#har% a d'i#
0hn )!t o'r it, 0irlssl(+ *sids r#har%in% moil !hons,
n%inrs ha' usd this d'i# to 0irlssl( o!rat li%hts, lasr
t#+ A %rou! of rsar#hrs from, S#hool of "l#tri#al S(stm
"n%inrin%, Uni'rsiti ala(sia /rlis has !ulishd a stud(
similar to our solution >3?+ Althou%h, th rsar#hrs trid to
transfr th r=uird 'olta% throu%h #ou!lin% #oils instad of
im!lmntin% an( mor #ir#uits on th r#i'r @#!t r#tifir+
Th stud( did not in#lud th !h(si#al im!lmntation of th
ida to #har% !hons, rathr it #on#ntratd onl( on 0irlss
!o0r transfr+
III+ .irlss oil $har%in% 6ram0or)
. r#i' a -7 D$ !o0r from an 8T: su!!ortd !hon+ This
D$ !o0r 0ill #on'rtd into a hi%h fr=un#( A$ si%nal
0ith th hl! of a $ol!itts 8s#illator+ Th hi%h fr=un#( A$
si%nal 0ill transmittd throu%h a ma%nti# #oil 0hi#h 0ill
rmain #ou!ld 0ith anothr ma%nti# #oil at th r#i'r ndTh hi%h fr=un#( A$ in!ut from th #oil 0ill !assd
throu%h a full9rid% r#tifir #ir#uit+ This 0ill #on'rt th A$
si%nal into a D$ !o0r 0hi#h 0ill thn oostd to -7 usin% a
7olta% R%ulator+
I7+ Thor( of 8!ration
Th asi# ida of th s(stm is to ta) th !o0r from a #har%d
!hon and dli'r it to anothr on 0irlssl(+ Th 0irlss
!o0r transfr of th s(stm is asd on indu#ti' #ou!lin%
t0n transmittin% and r#i' #oil+ Th transmittin% !hon
nds to su!!ort US* 8T: ;8n9Th9:o< to dra0 th !o0r intoth s(stm+ US* 8T: is a s!#ifi#ation first usd in lat 21
that allo0s US* d'i#s su#h as moil !hons to a#t as a host
allo0in% othr US* d'i#s su#h as US* flash dri's, di%ita
#amras, mi# or )(oards to atta#hd to thm+ Th !ur!os
of it allo0s it to dissi!at #onstant -7 'olta% and u! to 1+-mA
#urrnt ;d!ndin% on US* 'rsion and !roto#ols< >?+ Initiall(
0 #an us this !o0r to sr' our !ur!os+ 6i%+ 1 sho0s th
asi#
mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]
8/18/2019 Mobile Phone to Mobile Phone Wireless Power Transfer
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6i%+ 1B *lo#) dia%ram of th s(stm
lo#) dia%ram 0hr th os#illator %nrats a A$ !o0r and
transfrs it 0irlssl( throu%h #ou!lin% #oils+ Th A$ !o0r is
thn r#tifid to D$ 0ith a sim!l full rid% r#tifir+ Th D$
!o0r is thn #on'rtd to -7 D$ 0ith a 'olta% r%ulator
0or)in% as u#) #on'rtr+
Th ida is to #on'rt th D$ su!!l( into a hi%h fr=un#( A$
su!!l( 0ith th hl! of an os#illator, 0hi#h 0 nd in ordr totransfr 0irlssl( >C?+ 6or th os#illator 0 usd a sim!l
$ol!itts os#illator+ Th os#illator is a sim!l on to im!lmnt
and in% a #urrnt os#illator it is hl!ful for th s(stm >1?+ Th
A$ !o0r is thn transfrrd 0irlssl( throu%h indu#ti'
#ou!lin%+ In indu#ti' #ou!lin% !o0r is transfrrd
t0n #oils of 0ir ( a ma%nti# fild+ 6i%+ 2 sho0s th lo#)
dia%ram for th 0irlss !o0r transfr throu%h indu#ti'
#ou!lin%+ Th transmittr and r#i'r #oils to%thr form
a transformr+ An altrnatin% #urrnt ;A$< throu%h th
transmittr #oil ;1< #rats an os#illatin% ma%nti#
fild ;*< ( Am!rEs la0+ Th ma%nti# fild !asss throu%h th
r#i'in% #oil ;2
8/18/2019 Mobile Phone to Mobile Phone Wireless Power Transfer
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6i%+ 4B R#i'in% nd
Th A$ si%nal from th #oil is !assd throu%h a full9rid%
r#tifir to %t D$ 'olta%+ This D$ 'olta% is thn oostd u!
and r%ulatd 0ith a 7olta% R%ulator #ir#uit+ Th ida of this
r%ulator is to #ontrol th out!ut 'olta% 0hil #han%in% th
'alu of R1 and R2 from fi% 4+ Th 'olta% #an #ontrolld (
usin% th follo0in% formula N
7out G 7rf ; 1 R 2 R 1 < Iadj L R 2
.hr, 7rf is th 'olta% t0n 7out and adjustmnt !in and
Iadj is th #urrnt throu%h adjustmnt !in+
Th 'olta% r%ulator has n #hosn to )! th s(stm sim!l
and u!on simulation rsults+ D!ndin% on th !ra#ti#al s#nario
0hi#h mi%ht 'ar(, as thr ar lots of oost #on'rtr
m#hanisms to oost and #ontrol th D$ !o0r+
7I+ Rsults and Dis#ussion
6i%+ -B /ra#ti#al im!lmntation of r#i'r and transmittr
;usin% -7 D$ attr(<
This is th !ra#ti#al #ir#uit dsi%n+ Th lft !ortion of th dsi%n
is th transmittin% nd and th ri%ht !ortion is th r#i'in% nd+
Hr, th 'olta% r%ulator #ir#uit is not im!lmntd+
Th out!ut of th r#i'in% #oil 0as masurd in th la in
'arious #ir#umstan#s+ . too) -7 D$ from th !o0r su!!l(
as our in!ut !o0r of th transmittin% nd+
;a<
;<
6i%+ B A$ out!ut a#ross r#i'r ;a< #oils ar nar a#h othr ;<
#oils ar ta)n farthr a0a(+
.ith th #han% in distan# t0n #oils, th out!ut fr=un#(
#han%s+ Th #losr th #oils, th ttr th ffi#in#(+ At
a!!ro@imatl(, 2 #m distan# 0 %ot 3+47 A$ out!ut from th
os#illos#o! radin%+ .hras, th RS 'alu masurd 0as
3+27+
Th !a!r has n don in th middl of our @!rimnt and
thus th rsults ar onl( from th !arts 0 ha' #ondu#td till
no0+ Th 'olta% r%ulator has not n im!lmntd hr ut
0 @!#t to ha' our dsird out!ut as it 0as simulatd
su##ssfull(+
7II+ $on#lusion
In this !a!r, 0 aimd to transfr a lo0 !o0r D$ 'olta% from
on moil to anothr for #har%in%+ . dalt 0ith #ou!lin% #oilsand thir rsonan#+ $ol!itts 8s#illator, 6ull9*rid% R#tifir
and 7olta% R%ulator #ir#uits ha' n im!lmntd hr+ Th
@!rimnt 0ill in#lud moil to moil !o0r transfr in a
f0 da(s+ This !roj#t 0ill %i' us a n0 o!tion of r#har%in%
our !hons at tims 0hn 0 mi%ht not ha' !ro!r #har%in%
outlts+ This sim!l ida is a fasil and in@!nsi' on in th
fild of moil #har%in%+
A#)no0ld%mnt
8/18/2019 Mobile Phone to Mobile Phone Wireless Power Transfer
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This 0or) is undr th su!r'ision of Dr+ Hasan Uz Zaman,
Asso#iat /rofssor, &orth South Uni'rsit(+ Th authors
%ratfull( a#)no0ld% th hl!ful #ommnts and su%%stions of
th rs!#td fa#ult(, 0hi#h ha' im!ro'd th 0or)+
R frn#s
[1]Colpitts Oscillator , ;21-