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Title:
SINGLE STAGE SWITCHING POWER AMPLIFIER WITH BIDIRECTIONAL ENERGY FLOW
Document Type and Number:
WIPO Patent Application WO/2014/082580
Kind Code:
A1
Abstract:
A switching amplifier realizes bidirectional energy flow and combines switching and power amplification into one single stage so as to increase system efficiency. The modulator circuit of the amplifier receives and modulates an input signal, and generates and outputs modulated driver signals, which are used by the power driver circuit to generate signals to drive switching transformers of an amplifier circuit of the amplifier, and control signals, which are used to control and output generator circuit so as to allow individual inductors across the load by enabling current flowing through the load to have a path to ground. The amplifier circuit comprises switching transformers as well as circuitries configured to capture energy returned from the load and enable the captured energy to flow back to a power supply circuit of the amplifier through an energy flow-back circuit of the amplifier.

Inventors:
CHEN XUEJIAN (CN)
Application Number:
PCT/CN2013/088008
Publication Date:
June 05, 2014
Filing Date:
November 28, 2013
Export Citation:
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Assignee:
CHEN XUEJIAN (CN)
GUANGDONG RUI DING ELECTRICAL TECHNOLOGY LTD (CN)
International Classes:
H02M3/22; H02M1/00
Foreign References:
US20110299309A12011-12-08
CN102457193A2012-05-16
CN101939899A2011-01-05
JPH0823241A1996-01-23
Attorney, Agent or Firm:
DONGGUAN ZHONGDA PATENT AND TRADEMARK CO., LTD (Taifeng BuildingNo.138, East West Road, Guanchen, Dongguan Guangdong 0, CN)
Download PDF:
Claims:
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■ pome supply nnsnn comprlsmg at least erne power supply and t£ least au aapadlorv the powar supply c icrnft oanf-^urni UJ supply ower snd sun and nx-trculite flow- back energy;

■ TBivhiltn circuit carftfUEal to receive an input signal, die received input signal, output a phmllcy of .njfitnblas drive si anils timimititj a set of one or mm modulated switching drive si n l** aad output a control sigml »ot of one or mom control signals;

■ power driver circuit configured to recefro power from the power supply drcult, receive the plurality of switching drive signs!*, jtnd grnrmtff * set of switching trsnsformer ddrer t¾wl* rnc ndfng it It t one modulated s itching tr n former dr fsr signal;

m— wriwfef drcult croiprtring first sad second »w» H«w sul>drcul&» each junplUler snh- jtcuit coinpiifing!

t, switching ttnufiantxf t Ting * primary wlndtDg end a sccoadary irmdmg* the primary winding coupled to the power driver circuit and receiving two of the ict of switching ***™r ddnr signals therefrom with at least one of At two xecdTtd jjgnalf hdag ft modulated switching tnuuformcr Mra *itfl*L the Kooodary winding jMUWti^ HA Mt-jJHhMi *m¾tdth.g frtffn *-! rigttll*

ft secondary winding cfacrilry coupled to the sccoudaty winding and conQ^uted to mll-wav* rectify the τ1*11 nritdhing ^™1"1"*— 1 signal to y"— * a rectified *wyl¾fl*< modulated signal at an output node of the■""Γ^** iniib- circuit and caphn etuat j frtufjaad via the output nude front t load

an Mi--rgy flow-back drcult coupled to th power mpQly circuit, coupled to th* rtwpectiTB secondary winning uiLuiuie* of me first and seoondτ™— 1 iub<aranti, and cmrfgnred to flow o ntnrn energy captured in he Hccudary winding draritni bac , to the power supply r-rrriTTt frrr jliu- ijw, mrn T-wr n-n1.rt .n- |Qd

flm w^jrr* hw Γππι¾ miijiliiH ht rtiw IIMJ li— inj t» ΐιηϊτιιΐί CflU jIfld to tbfl tWO respective output nodes nf me first and second -miplifi--r snb-csnanti χκαπηι; me set of control signals tratputtfld by me modulator drcuit, and ofnu^ uren to doosonuunn- nadir the ccntrol of tbe tnnnd aanal let, me ivctuud τ™"*1 w-r-rfni»-w ngnak al theiwpectiTB output nodn to generate so n-i-pKfimi <iiiT- <u.H.i BJripot lignal nw AD two tenn al* of Hie load neb Hurt B curnnt from either of tbe two output node* flown to a ground through the load,

a ipike-cliniping dnad to an mnhnry power iuppl md die two nvpectiTB output nudfM of lbs fixst md faoEmd "τ™" fdMtrcuita, md oanf^gnnd to olnnp Tohags mflsK at tbe two ompot nodiM, tnn the

energy via the inxiliay po rx supply.

1. The t itching power unpbfier of Gbdm lt wherein tbe nuduljiDr circuit is configured to output the phnhty trf fwilxinnj drive rigniLi each bar ng■ wivaform of puke tiaras with equil 3D* duly cycles, with die set m* one or mm τπηιΐπΐι»ί switching ddn -OgBole pimw-i ft modulated bued OB fainpled sigBed signal levels of the input signal In mlnkm to tbe— wj-Hnw of dv Input rignaL; md

wherein the modnlator yhxath is configured to output ¾¾■ control lignjl tot Ind d ig two control idgnlji having remwdw wwepaiii.* corrqponduig to the res ective wimAjrm* of tbe Kt ιβ tyo oidjiDt notmU of tihfi- flzxt mil. ΙΑΚΙΕΙΙ

4, The n ifeiitaf power amplifier of cWm 3* h rein H¾ feconoary indin of each rf the first ud HOODd "f"'1' flu- tocolti comptijc* a «pUt winding luring u upper Mb winding and (t lower sob winding; nd

wberein for <*ca of tii£ fiat md scowl «ccad«y wtodfcig ciran e* and tbe fCttodar winding ^copied thereto^ the Ksccodary winding fiimprlra1 * *plit winding hrring an tipper fob winding ud 9, lower flu winding, the iwondnty winding cJLKtu ry coinpriiBf a flfft (Bode eoG lcd to a lower ****Η.ΗΜΪ f tbe u er n winding sod & dwde coupled to- *n u p r terminal of the lower tub winding, wi b bom tbe fiat and ucond dJod«* biuied la tbt sveae direction, An .urther rmiiifirf- th* output node coupled to bou fbe upper titndoul of due upper n b winding and me lower teminiidiif ϋκ lower nib windma

5. The iwildunB; power -m-t iif of clans 4. whenin the energy now-back circuit ™«ρϊη— first end Hand energy flow- back mb-aranti mpoctrnly coupled to the ftocunduiy winding cncmt iiM of tbe firet -mJ u™l jmpHfifr ίηθ-κιοιΑχ; sad

whenin far each of the fint and asmd energy flow-back rab-cnuurti, the energy flow- back rob-circoit θΒΒψπΛα a tnrafonner having:

a primary wmduu, coupled to die ancannidnuj secondary wmdisf drcuitry rin the lower tenmnal of the upper sub whidhu; and the upper tennhnl of the lower snb wiialuBj uuawof and

kTtj TT*"" t™ and a center-tap coupled to a arimndV mo upper md lower imfm-da mpectinly coupled to no upper and lower chodfii both forawd-hiued and coupled to the power su ly ILLLUIL

6. The fwtadilng power «npHfi»- of daim Ά, wherein the output generator emenft eonprlies:

firjt end tecoud low-p*u flhcrj rac< tivcly coupled *P the two output node* of in fh*t mad araoi-d ampntior snb-idinnne and iwpoctivflly ooupled to die two l wiiiliwlj of" the. load* the flrft and S&ccnd low pMJ ffltew <*c having ft lewt OK Indwfttf and it lewt

the at lea* one mdictcr of the not law-nan niter and die at least aw Indnctor of ihe necond low-pJVf filter b ing ino fldnal inductors and hnmg no or loo e magnetic coupling from one as-otner and

flnt md f cofld iwlu iei tetyutlrcl coupled to Ihe Out and mend low-ρβ fittcro* and retpe tlTely ddTta by Bat and Hcoud coatioL tlgnjuf of the caatrot dgpal aet tunpUed by the tttttiolttof chvtdt roch tiutt the flat ad necoad iwitche* are tuned on and off ottaiBtely and only one of the flnt and Hcond fwiftbef toe tamed oa *t * time;

T. The -^t&mg power *tttf-Hfl-÷* f clAurj 6, wbexein Ihc waveiomij of mt flrrt tod lecosd control rignali, with regard to gomg h.gh and low, track and follow me wtvt£ott£* of me rigaak at the output node* of me Mcood and flrft≠twpw rMpe hrab/.

e raaoBant network tiiLui ,, and wherein this ""rJifi*gr cucuit it angled ID (he power driver circuit via (be

network circuit, md me ^™"1 aotwnk circuit ii configured to aclnare (oft (witching ct io ftsncoliy rero cmnn at switching DCHIH cf the power driver circuit to- which the iwooaot network tliLuil if coupled,

9. The imtdxiiig power »*»ιρ1·Ητ*«- of chum wherein the odukitx csuuit receime power from the rcriliny power supply.

10. AriiEflhV«-uipiifliiii

fint md Hccfid twitching tmufonmre each campmin^ i prmury winding md■ lecondny wmdtng; i power fnpply innrit casipcLiinf it lent one power tuppty md it lest one cerjarftBT me power supply ciiLuil cflnfigmd la supply power md itan md r*r*T1 T,t«t* flow -tack energy;

t power driver circuit WJnrignred toreofi v power from the power fnpply ircuit receive, from * modnlqinr circuit * rAgtlfry of tw¾chii¾ drive, ylynlj h¾ rndn¾ · set of one or mas swltcmn drive dgniiit md jenernte i set of f cbing trflpjfan»er driver rifniU tncludrnj at leut one modn ted switching taaufrjaner -frLver ί βΐ, wherein the primjuy wmdfng °* *** Aft™l Hcood fwUchuif tnajformcrj if conpled to the power driver dr att tod indvef two of the κ* of swltcihmi tnattfonncr ddrcr rigjulj therefrom with St latft one of the two re dTed rigmlf btl¾ n moduliTcd iwttchlng tttnjfottacf driver tfrtia];

ui cSrcrgj flow -buck clfcutt coupled to the power npprj cfrcQb* conpled to- fJnt end Mcood lecondary winding dradtriM of a MCOttdtry rid* ciraiit, end ccflQgnd to

ropfi circuit for rtct¾# and ntirailalioii end

the ttccfldftry tide circuit hm u ttccfldar ground, the uccfldtry tide circuit "■■¾■■"■■¾

the modulator circuit configured to recern m input ngnal, uwdulidD the received input -Ognik output me phnhly of switching drive Hjoali iw »Kwj the tet of one or mm odulated nritdmig άάπ ngBaliy ami output a emtio] linul Ht of <n or man control ngnli;

me fint ad tveoad Mraduy wimiiii*; vnuimaDf nwpectimly coupled to Has HsuodarY winiiii i of the fint and HCDud ireitdxing tnau ormerfi, each of the fint and ■Bond Hcraidary winding comntnaa coaled to the energy flnw-b«k EixEait end iDcavmg an "T1^"1™*dn modalatad sagon] generata! by mo secondary winding Bomdad (bento lad oocifigand to fnH-mra notify me "τ^"1 nrilaniuj *""*"t"*«< ■isnl to generate n notified τ™»*1 TTW¾*Tl1"^ aignil at in output node thereof asd capture energy leluLuod via the output nude from a load; md

the output generator drcuit coupled to the load having two nrinala coupled to the tm ntpoodTn output nodea of me fint ud tccond K tndar winding clrcuioi«j receiving the oostrol signal act outpooed by the modulator unnril, and. configured to deniotralate, Taader the control of the central dgnil tet, trie rectified amplified mDdnhued dgnalj at the. mfpective output nodes to generate an amplified dtffereariil aalpia: tlgnil •pros me two tcmrinalt of mc kad *w that a anient from timer of me two output

11. The decuk of claim ΙζΙ+, wherein nSe lecoodary «lde circuit farther cora riKd:

a spike-clamping circuit coupled to Jtn miilHary power supply and me two reepectlTe ootput node* of me first md second Ko eSer winding eifcrtftriiJ, and coiiflgnred to dwnp Toltajc tplkcf at the two output node, nose the- damped energy* xe Jbradatc the stood clnuped caerjy ΐ* me auxiliary power supply*

12· Hue clfcvit of clkmi 10» nbcRiii the inndubtor circuit it toBBgoitA to uulpul tbc plurality of nritcuing driva idgajui **A having i wuvaforui of pal** tnuni with equal 30* duty eyelet, wim m* act of one or mac modulated swftdiint drrvt i-gnol* ph«c ihtft modulated ued os tamplnd idgnod t-gno krvtJj of the input li&nal In relation to the imj-Jitn^h of the input aignAl ad control Ngmdi having napnetiva wiTflfuuna cunapondin£ to t o nipoctivc waroCuwia of the

13. The circuit of dam 12, wherein the Kxxmdary winding of each of the fint and tecond roitching tnatffxmBiv οοπνκΪΗΐ B spi-ft winding tarring an upper sub winding md a lower nib winding and

wherein fur each of the fhst md second lecaoduy winding '-irniiiriwa and the secondary winding coupled Ibflnto, die ncoulncy wmdmg circuitry ananase a first diode coupled to B IUH tfiiuiliiil of the upper tab wmcbnf and a second iode coupled to an upper of he luii la sub winding with both the first and Hcand diodes tanaed in the renew diiection, and further OUUUIIJHJI the output node ctmplod to both the npper tgrrmnal of the upper no winding ■nd die lower tBznrinil of the lower »nb winding.

14. The circuit trf claim 13, wherein the energy flow-back circuit cuuipjieuft fust md §eoond energy flow-back mb-circuita respectively coupled to the flnt md flfleend tecoodn winding

wherein for each of the nnjt and tecond energy flow-buck tnb-i&Etft*, die energy flow- back

a pamarj windliu

the lower mm-nat of the upper nd) i tnj end the upper tenoinel of the lowe snb wb¼ftn¾ thereof^ and

a j wfldw lmftflg; bwing an npper tcnnlnalj a lower tcnttinfll, and ftctntef-tep coupled to the primary gr und^ the upper md lower tc tflfank i fp ctr ly coupled to Tipper end Iowa cBodej both. foewvd- Miscd md coupled to tile power fl prj circ it*

13. The circuit of cbdm 12 wherein me output icacrotor circuit cornprltta:

flrrt and Se ond low pau Alton eupectlvely coupled to tbi two output nod** of the flirt ud wood κκΛθάαν wiirfiDf CIKQMH. and rapcttrvelj coupled to OK two tennmalf of the load, the firrt and second low-paj* fiUws each hrrinf at Inert one inductor and at l ut one capaeila. wilm aat t laart

the fBcond low-paw fitter being individon! inducton and hxving no or Uw e coupling from on* another; and firit md racoad r itdus* nupfrtivcly coupled to the Gat and Hcrad krw-pau cuset end refpe uvnly άππα by fint and Mccnd control ngna of Lbe control amial tat -ru pUed by the "r*tn\xtnr cnurat ndi the tbc fint and levoul f Uche* are turned oc and off attmilidy and only one of Han fint and ucend nritdw an tamed en at a tims;

16. The cncmt of djim lSt whcjoin the svci nDi of the fint «nd second control nasals; with regard to pring high and knr, tntik and fellow Lbe wavafamit of tbe lifnali at the output uodee of the second end fint Becandar^ wnannij cncnnrinip inspect-vely.

17. The circuit of claim 10, wherein the pnmny ode circuit further canprLw:

■ reecmut aefimxk cncmt and

whezcni the primary mdmp of ma first and Mxxmd inrilc ing tnwfixmaij in each coupled to me power driver cncmt via me mtrnant network cncin , and the raaum nacnuk cncmt It cflO-C-innd in achieve in£t ndlis uj BL substantially zero current at ivitc hig nodee of the power driver circuit in which th rowmnt network circuit is coupled ,

Hi Ttia df^o cltlm 11, whei^

power supply.

Description:

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