Paub txog cov khoom siv hluav taws xob hloov pauv thiab cov khoom siv hluav taws xob linear

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Paub txog cov khoom siv hluav taws xob hloov pauv thiab cov khoom siv hluav taws xob linear

Nws paub zoo tias ntau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob tswj tau ua haujlwm los ntawm DC lub zog hluav taws xob. Ua ntej lub zog hloov hluav taws xob tshwm sim, lub zog ua haujlwm ntawm cov khoom siv no feem ntau siv lub zog linear.

Cov khoom siv hluav taws xob linear yog ib qho khoom siv uas siv lub hwj chim hloov lub raj hauv series nrog lub nra kom ruaj khov rau cov zis DC voltage lossis tam sim no, kuj hu ua series-regulated DC tswj fais fab mov. Nws muaj ob hom DC voltage regulator thiab DC tam sim no regulator. Cov khoom siv hluav taws xob linear feem ntau yog tsim los ntawm lub hwj chim zaus transformer, ib qho kev tswj tsis tau rectifier lim Circuit Court, lub raj hloov kho, thiab tswj Circuit Court. Lub input AC zog yog cais thiab hloov los ntawm lub hwj chim zaus transformer, rectified thiab lim, thiab kho los ntawm regulating raj los muab ib tug ruaj khov voltage los yog tam sim no rau lub load. Thaum lub input AC voltage los yog lub load davhlau ya nyob twg tam sim no hloov pauv ua rau cov zis tsis ruaj khov, lub tswj Circuit Court hloov qhov voltage poob (conduction degree) ntawm lub adjustable raj raws li qhov kev hloov ntawm cov zis, thiaj li hais tias cov zis DC voltage los yog tam sim no nyob twj ywm. ruaj khov. Cov khoom siv hluav taws xob linear muaj qhov zoo ntawm qhov yooj yim Circuit Court, me me ripple, zoo electromagnetic compatibility, high voltage kev cai raug thiab tus nqi qis. Txawm li cas los xij, nws qhov kev siv hluav taws xob sab hauv, kev ua haujlwm tsawg, qhov ntim loj, hnyav hnyav, me me dynamic ntau ntawm cov khoom siv hluav taws xob, thiab cov zis hluav taws xob tsis tuaj yeem siab dua qhov hluav taws xob input kuj pom tseeb. Nws muab piv raws li lub zog qis DC fais fab mov, tshwj xeeb tshaj yog micro-power DC fais fab mov. haum.

Nrog kev txhim kho txuas ntxiv ntawm kev siv tshuab hluav taws xob, kev sib koom ua ke ntawm cov khoom siv hluav taws xob tau nce zuj zus, kev ua haujlwm tau zoo dua thiab muaj zog dua, thiab cov kev xav tau ntim tau me dua thiab me dua. Yog li ntawd, ib hom tshiab ntawm cov khoom siv hluav taws xob nrog me me, lub teeb yuag, kev ua haujlwm siab thiab kev ua haujlwm zoo yog qhov xav tau ceev kom ua tau raws li cov kev xav tau ntawm cov khoom siv hluav taws xob, thiab qhov kev thov no tau dhau los ua lub zog tsav rau kev txhim kho kev hloov hluav taws xob siv tshuab.

Yog vim li cas vim li cas qhov kev ua tau zoo ntawm cov khoom siv hluav taws xob linear tsis siab yog qhov kev hloov kho lub raj ua haujlwm nyob rau hauv ib qho kev nthuav dav hauv lub xeev thiab cov raj hloov kho yog nyob rau hauv series nrog cov load. Hom kev ua haujlwm no ua rau lub zog loj poob thoob plaws lub raj regulator, thiab lub zog poob yuav tsum ntau dua ntawm cov khoom hnyav, tshwj xeeb tshaj yog thaum AC input voltage siab dua tus nqi ntsuas.

Yuav kom txo tau lub zog poob, thawj qhov uas engineers xav hloov yog lub xeev ua hauj lwm ntawm lub hwj chim raj. Ntawd yog, lub raj hloov kho tsis ua haujlwm hauv lub xeev amplified tab sis nyob rau hauv ob lub xeev ntawm saturation thiab txiav tawm, uas yog, lub hwj chim raj siv los ua ib tug hloov, yog li txo lub hwj chim raj. Qhov hluav taws xob poob thoob plaws qhov kawg txo nws lub zog poob. Qhov kev hloov pauv hauv kev ua haujlwm no coj ob qhov teeb meem, ib qho yog yuav ua li cas muab lub zog DC du rau lub nra, thiab lwm qhov yog yuav ua li cas kom ruaj khov rau cov zis DC voltage. Qhov kev daws teeb meem rau thawj qhov teeb meem yog siv cov lim dej qis qis. Qhov teeb meem thib ob yog daws los ntawm kev siv Lub Sijhawm Ratio Control (TRC). Lub sijhawm hu ua proportional control txhais tau hais tias lub saturation conduction ntawm lub hwj chim tswj lub raj yog proportional rau lub sij hawm ntawm lub txiav. Txoj kev siv tshwj xeeb tej zaum yuav yog qhov saturation conduction thiab tag nrho lub sij hawm txiav tawm yog tsau, thiab lub sij hawm saturation conduction ntawm lub hwj chim raj hloov hloov lub sij hawm piv. Txoj kev no hu ua pulse width modulation; Secondly, lub hwj chim raj saturation conduction lub sij hawm yog tsau, thiab lub hwj chim hloov. Lub saturation conduction thiab txiav tawm tag nrho lub sij hawm ntawm lub raj hloov lub sij hawm piv. Txoj kev no hu ua pulse zaus modulation. Qhov thib peb yog tias qhov saturation conduction thiab txiav tawm tag nrho lub sij hawm ntawm lub hwj chim raj thiab lub sij hawm saturation ntawm lub hwj chim raj tsis tas. Hloov lub sij hawm thiab saturation raws sij hawm hloov qhov piv ntawm lub sij hawm yog hu ua hybrid modulation. Ntawm cov saum toj no peb txoj kev hloov kho, daim ntawv thov ntawm pulse width modulation yog qhov siv dav tshaj plaws thiab nrov.

Qhov thib ob, txhawm rau txo qhov ntim ntawm cov khoom siv hluav taws xob tawm thiab txo nws qhov hnyav, yuav ua li cas tshem tawm AC input fais fab zaus transformer ua qhov teeb meem tseem ceeb. Yog hais tias lub hwj chim zaus transformer tsuas yog muab tshem tawm, lub Circuit Court muaj ib qho kev sib piv ntawm cov rectified DC voltage thiab tom ntej circuits. Kev sib cais hluav taws xob ntawm cov tswv yim thiab cov zis, tom qab kev tshawb fawb thiab kev tshawb fawb los ntawm engineers, pom tias lub transformer tuaj yeem muab tso rau tom qab lub zog hloov khoom siv, qhov ntim thiab qhov hnyav ntawm lub transformer yuav txo qis raws li qhov zaus ntawm lub zog hloov hluav taws xob nce, yog li txo. tag nrho Qhov loj thiab qhov hnyav ntawm lub hwj huam mov. Raws li lub tswv yim no, lub zog hloov hluav taws xob tsis muaj hluav taws xob zaus voltage (siab zaus transformer) tau txais, thiab lub zog hloov hluav taws xob tau yug los.

Lub mains ncaj qha hla lub input lim, lub diode rectifier Circuit Court thiab lub capacitor lim kom tau DC voltage. DC voltage yog inverted los ntawm inverter Circuit Court rau hauv high-frequency square wave pulse voltage, uas yog cais los ntawm high-frequency transformer thiab dhau los ua ib qho tsim nyog AC voltage. Cov zis rectification thiab filtering Circuit Court yog hloov dua siab tshiab rau qhov yuav tsum tau DC voltage tso zis. Thaum lub input AC voltage los yog load hloov, DC output voltage kuj qhia ib tug qauv ntawm kev hloov. Lub sij hawm no, lub sij hawm piv ntawm lub square yoj mem tes voltage outputted los ntawm lub inverter Circuit Court yuav raug kho, kom lub DC tso zis voltage yog ruaj khov. Los ntawm cov saum toj no, peb tuaj yeem nkag siab tias lub inverter Circuit Court yog qhov tseem ceeb ntawm lub zog hloov hluav taws xob. Tsis tas li ntawd, txij li qhov ntau ntawm cov suab uas tuaj yeem hnov ​​​​los ntawm tib neeg pob ntseg yog feem ntau 20 Hz txog 20 kHz, thaum hloov zaus ntawm inverter Circuit Court raug xaiv los ntawm 20 kHz lossis ntau dua, cov suab nrov nrov tuaj yeem zam tau.