Lub hauv paus ntsiab lus ua haujlwm ntawm kev hloov fais fab mov Peb lub hom phiaj ntawm kev hloov fais fab mov
Lub hauv paus ntsiab lus ua haujlwm ntawm lub zog hloov hluav taws xob Cov txheej txheem ua haujlwm ntawm lub zog hloov hluav taws xob yog qhov yooj yim to taub. Nyob rau hauv linear fais fab mov, lub hwj chim transistor yog tsim los ua hauj lwm nyob rau hauv lub linear hom. Tsis zoo li cov khoom siv hluav taws xob tawm, PWM hloov hluav taws xob ua rau lub zog hluav taws xob ua haujlwm hauv lub xeev thiab tawm. , nyob rau hauv ob lub xeev no, cov khoom volt-ampere ntxiv rau lub hwj chim transistor yog me me (thaum nws qhib, qhov hluav taws xob qis thiab qhov tam sim no loj; thaum nws raug tua, qhov hluav taws xob yog siab thiab tam sim no yog me) / volts ntawm lub hwj chim ntaus ntawv Cov khoom Ampere yog qhov poob generated ntawm lub hwj chim semiconductor ntaus ntawv.
Txoj haujlwm ua haujlwm ntawm kev hloov hluav taws xob
Cov txheej txheem ua haujlwm ntawm kev hloov hluav taws xob hloov pauv tau yooj yim to taub. Nyob rau hauv linear fais fab mov, lub hwj chim transistor yog tsim los ua hauj lwm nyob rau hauv ib tug linear hom. Tsis zoo li cov khoom siv hluav taws xob linear, pwm hloov hluav taws xob ua rau lub hwj chim transistor ua haujlwm hauv lub xeev thiab tawm. Nyob rau hauv lub xeev, cov khoom volt-ampere ntxiv rau lub hwj chim transistor yog qhov me me (thaum nws qhib, qhov hluav taws xob qis thiab qhov tam sim no loj; thaum nws raug tua, qhov hluav taws xob yog siab thiab tam sim no me me) / cov khoom volt-ampere ntawm lub tshuab hluav taws xob yog lub zog semiconductor poob tshwm sim ntawm lub cuab yeej. Piv nrog rau cov khoom siv hluav taws xob tawm, cov txheej txheem ua haujlwm tau zoo dua ntawm pwm hloov hluav taws xob yog ua tiav los ntawm "taws", uas yog, chopping lub input DC voltage mus rau hauv lub mem tes voltage uas nws amplitude yog sib npaug rau cov input voltage amplitude. Lub luag haujlwm lub voj voog ntawm cov mem tes yog hloov kho los ntawm tus maub los ntawm lub zog hloov hluav taws xob. Thaum cov input voltage raug txiav mus rau hauv AC square nthwv dej, nws qhov amplitude tuaj yeem nce lossis nqis los ntawm lub tshuab hloov pauv. Los ntawm kev nce tus naj npawb ntawm cov windings theem nrab ntawm lub transformer, tus naj npawb ntawm cov zis voltage pawg tuaj yeem nce ntxiv. Thaum kawg, cov AC waveforms no tau kho thiab lim kom tau txais DC tso zis voltage. Lub hom phiaj tseem ceeb ntawm tus maub los yog ua kom cov zis hluav taws xob ruaj khov, thiab nws txoj haujlwm yog zoo ib yam li cov kab ntawv ntawm tus maub los. Qhov ntawd yog hais tias, qhov kev ua haujlwm thaiv, kev siv hluav taws xob thiab kev ua yuam kev amplifier ntawm tus maub los tuaj yeem tsim los ua tib yam li ntawm cov kab hluav taws xob regulator. Qhov sib txawv ntawm lawv yog tias qhov tso zis ntawm qhov yuam kev amplifier (yuam qhov voltage) dhau los ntawm qhov voltage / mem tes dav hloov dua siab tshiab ua ntej tsav lub hwj chim transistor. Muaj ob hom kev ua haujlwm tseem ceeb ntawm kev hloov hluav taws xob: kev hloov pauv mus rau pem hauv ntej thiab txhawb kev hloov pauv. Txawm hais tias qhov kev npaj ntawm lawv ntau qhov chaw me me, cov txheej txheem ua haujlwm sib txawv heev, thiab txhua tus muaj nws tus kheej zoo hauv cov ntawv thov tshwj xeeb.
Peb tej yam kev mob ntawm switching fais fab mov
hloov
Lub zog hluav taws xob ua haujlwm hauv lub xeev hloov pauv tsis yog lub xeev linear
siab zaus
Cov khoom siv hluav taws xob hluav taws xob ua haujlwm ntawm cov khoom siv hluav taws xob ntau dua li cov zaus qis ze rau cov khoom siv ntau zaus
DC
Lub tshuab hluav taws xob hloov hluav taws xob tso tawm DC hloov AC thiab tuaj yeem tso zis ntau zaus AC xws li hluav taws xob transformers
Classification ntawm switching fais fab mov
Hauv kev hloov pauv hluav taws xob thev naus laus zis, tib neeg tab tom tsim cov khoom siv hluav taws xob muaj feem cuam tshuam thiab hloov pauv zaus hloov tshuab tib lub sijhawm. Ob leeg txhawb ib leeg los txhawb lub zog hloov pauv mus rau lub teeb, me me, nyias, tsis tshua muaj suab nrov, muaj kev ntseeg siab, kev loj hlob nyob rau hauv cov kev taw qhia ntawm anti-jamming. Hloov cov khoom siv hluav taws xob tuaj yeem muab faib ua ob pawg: AC / DC thiab DC / DC. Kuj tseem muaj AC / ACDC / AC xws li inverters. DC / DC converters tam sim no tau hloov kho, thiab cov txheej txheem tsim thiab cov txheej txheem tsim khoom tau ua tiav hauv tsev thiab txawv teb chaws. Standardization tau raug lees paub los ntawm cov neeg siv, tab sis lub modularization ntawm AC / DC, vim nws tus yam ntxwv, ntsib ntau nyuaj technical thiab txheej txheem tsim teeb meem nyob rau hauv tus txheej txheem ntawm modularization. Cov qauv thiab cov yam ntxwv ntawm ob hom kev siv hluav taws xob hloov pauv tau piav qhia hauv qab no.
Txoj kev loj hlob ntawm Switching Power Supply Technology
Txoj kev loj hlob ntawm kev hloov hluav taws xob hloov hluav taws xob yog qhov muaj zog, kev ntseeg siab, kev siv tsawg, tsis tshua muaj suab nrov, tiv thaiv kev cuam tshuam thiab modularization. Vim tias cov thev naus laus zis tseem ceeb ntawm kev hloov hluav taws xob yog lub teeb, me me thiab nyias nyias yog qhov siab, yog li cov tuam txhab loj txawv teb chaws hloov hluav taws xob tau cog lus rau synchronously tsim cov khoom siv ntse ntse tshiab, tshwj xeeb tshaj yog txhawm rau txhim kho qhov poob ntawm cov khoom siv kho mob thib ob, thiab hauv lub zog hlau Oxygen (Mn? zn) cov ntaub ntawv los ua kom muaj kev tshawb fawb thiab thev naus laus zis tshiab los txhim kho cov khoom sib nqus zoo ntawm cov zaus siab thiab loj sib nqus flux density (Bs), thiab cov khoom siv me me kuj yog cov cuab yeej tseem ceeb. Kev siv SMT thev naus laus zis tau ua tiav zoo hauv kev hloov cov khoom siv hluav taws xob. Cheebtsam yog teem rau ntawm ob sab ntawm lub rooj tsavxwm Circuit Court los xyuas kom meej tias lub switching fais fab mov yog lub teeb, me me thiab nyias. Lub siab zaus ntawm kev hloov hluav taws xob yuav ua rau muaj kev hloov pauv tshiab ntawm PWM cov cuab yeej siv tshuab. Lub tshuab hluav taws xob hloov hluav taws xob ntawm ZVS thiab ZCS tau dhau los ua cov thev naus laus zis tseem ceeb ntawm kev hloov hluav taws xob, thiab kev ua haujlwm ntawm kev hloov hluav taws xob hloov tau zoo heev. Rau cov ntsuas kev ntseeg siab, hloov cov khoom siv hluav taws xob hauv Teb Chaws Asmeskas txo cov kev ntxhov siab ntawm cov khoom siv los ntawm kev txo cov kev khiav hauj lwm tam sim no thiab qhov kub ntawm qhov sib txuas, uas zoo heev txhim kho kev ntseeg tau ntawm cov khoom. Modularization yog qhov dav dav hauv kev tsim cov khoom siv hluav taws xob hloov pauv. Modular cov khoom siv hluav taws xob tuaj yeem siv los tsim cov khoom siv hluav taws xob faib hluav taws xob, thiab N ntxiv rau 1 cov khoom siv hluav taws xob tsis sib xws tuaj yeem tsim los ua kom muaj peev xwm nthuav dav hauv kev sib txuas. Lub hom phiaj ntawm qhov tsis zoo ntawm lub suab nrov ntawm kev siv hluav taws xob hloov hluav taws xob, yog tias lub siab zaus tau ua raws ib leeg, lub suab nrov kuj yuav nce raws li, thiab kev siv ib nrab resonant hloov dua siab tshiab circuit technology tuaj yeem theoretically ua tiav siab zaus thiab txo suab nrov, tab sis qee qhov muaj. tseem yog cov teeb meem kev lag luam hauv kev siv tswv yim ntawm kev siv tshuab resonant hloov dua siab tshiab, yog li ntau txoj haujlwm tseem yuav tsum tau ua nyob rau hauv daim teb no los ua qhov kev siv tshuab no. Lub nruam innovation ntawm lub hwj chim electronics technology ua rau lub switching fais fab mov kev lag luam muaj broad txoj kev cia siab. Txhawm rau txhawm rau txhawm rau txhawm rau txhim kho kuv lub teb chaws txoj kev hloov hluav taws xob kev lag luam, peb yuav tsum coj txoj hauv kev ntawm kev siv tshuab thev naus laus zis, taug kev tawm ntawm txoj kev sib koom ua ke ntawm kev lag luam, kev kawm thiab kev tshawb fawb nrog Suav cov yam ntxwv, thiab pab txhawb kev loj hlob sai ntawm kuv. lub teb chaws kev khwv nyiaj txiag.
Txoj Kev Txhim Kho Standby Efficiency ntawm Switching Power Supply
txiav pib
Rau lub flyback fais fab mov, lub nti tswj yog powered los ntawm lub pab winding tom qab pib, thiab qhov voltage poob ntawm lub startup resistor yog hais txog 300V. Piv txwv tias qhov pib tsis kam yog 47kΩ, lub zog siv ze li ntawm 2W. Txhawm rau txhim kho standby efficiency, qhov resistor channel yuav tsum raug txiav tawm tom qab pib. TOPSWITCH, ICE2DS02G muaj qhov tshwj xeeb pib hluav taws xob sab hauv, uas tuaj yeem tua cov resistor tom qab pib. Yog hais tias tus maub los tsis muaj qhov tshwj xeeb pib Circuit Court, lub capacitor kuj tseem tuaj yeem txuas nrog cov khoom pib, thiab qhov poob tom qab pib tuaj yeem maj mam poob mus rau xoom. Qhov tsis zoo yog tias cov khoom siv hluav taws xob tsis tuaj yeem rov pib dua nws tus kheej, thiab lub Circuit Court tsuas tuaj yeem pib dua tom qab disconnecting lub input voltage kom tawm lub capacitor.
txo moos zaus
Lub moos zaus tuaj yeem ua kom nrawm nrawm lossis nrawm. Kev poob qis txhais tau hais tias thaum cov lus tawm tswv yim tshaj li qhov pib, lub moos zaus yog linearly txo los ntawm ib qho module tshwj xeeb.
hloov ua haujlwm hom
1. QR → pWM Rau kev hloov cov khoom siv hluav taws xob ua haujlwm nyob rau hauv high-frequency hom, hloov mus rau hom qis zaus thaum standby tuaj yeem txo qhov poob. Piv txwv li, rau quasi-resonant switching fais fab mov (ua hauj lwm zaus ntawm ob peb puas kHz mus rau ob peb MHz), nws muaj peev xwm hloov mus rau ib tug tsawg-frequency mem tes dav modulation tswj hom pWM (txog kaum ntawm kHz) thaum standby. Lub IRIS40xx nti txhim kho qhov ua tau zoo ntawm kev ua haujlwm los ntawm kev hloov ntawm QR thiab pWM. Thaum lub hwj chim mov nyob rau hauv lub teeb load thiab standby hom, qhov voltage ntawm lub auxiliary winding yog me me, Q1 yog muab tua, thiab lub resonance teeb liab tsis tau xa mus rau lub FB davhlau ya nyob twg. FB voltage qis dua qhov pib voltage hauv lub nti, thiab hom quasi-resonance tsis tuaj yeem tshwm sim, thiab Circuit Court ua haujlwm ntawm qhov tsawg zaus. PWM control mode.
2. pWM → pFM Rau kev hloov cov khoom siv hluav taws xob uas ua haujlwm hauv pWM hom ntawm lub zog ntsuas, koj tuaj yeem hloov mus rau pFM hom txhawm rau txhim kho kev ua haujlwm zoo, uas yog, kho lub sijhawm thiab kho lub sijhawm off-time. Lub load qis dua, lub sijhawm ua haujlwm ntev dua thiab siab dua qhov kev ua haujlwm zaus. Tsawg. Ntxiv cov teeb liab standby rau nws pW / tus pin, nyob rau hauv cov kev ntsuas load, tus pin yog siab, lub Circuit Court ua hauj lwm nyob rau hauv pWM hom, thaum lub load yog qis dua ib tug tej yam pib, tus pin yog rub tsawg, lub Circuit Court ua hauj lwm nyob rau hauv pFM hom. Kev paub txog kev hloov pauv ntawm pWM thiab pFM kuj tseem txhim kho cov khoom siv hluav taws xob zoo thaum lub teeb thauj khoom thiab lub xeev standby. Los ntawm kev txo lub moos zaus thiab hloov cov kev ua haujlwm, qhov kev ua haujlwm standby zaus tuaj yeem raug txo, qhov kev ua haujlwm standby tuaj yeem txhim kho, tus maub los tuaj yeem khaws cia khiav, thiab cov khoom tso tawm tuaj yeem tswj tau zoo nyob rau hauv tag nrho cov load ntau. Teb sai heev txawm tias thaum lub load surges ntawm xoom mus rau tag nrho load thiab vice versa. Qhov tso zis voltage poob thiab overshoot qhov tseem ceeb yog khaws cia nyob rau hauv qhov kev tso cai.
Controllable Pulse Hom
(BurstMode) controllable mem tes hom, tseem hu ua SkipCycleMode (SkipCycleMode), yog hais txog qee qhov txuas ntawm Circuit Court tswj los ntawm lub teeb liab nrog lub sij hawm loj dua lub sij hawm teev ntawm pWM maub los thaum nws nyob rau hauv lub teeb load lossis standby tej yam kev mob, yog li tias pWM Cov zis pulse yog siv tau lossis tsis siv sijhawm ib ntus, yog li ntawd qhov ua tau zoo ntawm lub teeb load thiab standby tuaj yeem txhim kho los ntawm kev txo tus naj npawb ntawm cov keyboards thiab nce lub voj voog ua haujlwm ntawm qhov zaus. Cov teeb liab no tuaj yeem muab ntxiv rau cov lus tawm tswv yim, pWM teeb liab tso tawm channel, pab txhawb tus pin ntawm pWM nti (xws li LM2618, L6565) lossis sab hauv ntawm lub nti (xws li NCp1200, FSD200, L6565 thiab TinySwitch series chips).
