Taw qhia rau Linear Power Supply
Cov khoom siv hluav taws xob tawm ua ntej hloov AC lub zog los ntawm lub tshuab hloov pauv, thiab tom qab ntawd kho thiab lim nws los ntawm lub voj voog rectifier kom tau txais qhov tsis ruaj khov DC voltage. Yuav kom ua tiav qhov siab-precision DC voltage, cov zis hluav taws xob yuav tsum tau hloov kho los ntawm kev tawm tswv yim voltage. Los ntawm qhov kev xav ntawm kev ua haujlwm tseem ceeb, lub tshuab hluav taws xob siv hluav taws xob no yog qhov paub tab, tuaj yeem ua tiav kev ruaj ntseg, muaj ripple me me, thiab tsis muaj kev cuam tshuam thiab suab nrov uas hloov cov khoom siv hluav taws xob muaj. Lub voltage tawm tswv yim circuit ua haujlwm nyob rau hauv ib lub xeev linear, nrog ib tug tej yam voltage poob rau ntawm kev hloov raj. Thaum outputting ib tug loj ua hauj lwm tam sim no, lub hwj chim noj ntawm kev hloov lub raj yog siab dhau lawm, uas ua rau tsis tshua muaj conversion efficiency.
Cov khoom siv hluav taws xob linear yog hais txog lub raj siv rau kev tswj hluav taws xob uas ua haujlwm hauv cheeb tsam linear. Raws li txoj cai, hloov hom fais fab mov yog hais txog lub transistor siv rau kev hloov pauv voltage uas ua haujlwm hauv cheeb tsam saturation thiab cutoff, piv txwv li lub xeev hloov.
Cov khoom siv hluav taws xob linear feem ntau kuaj cov zis voltage thiab xa mus rau qhov sib piv voltage amplifier nrog rau qhov siv hluav taws xob. Cov zis ntawm no voltage amplifier ua hauj lwm raws li lub tswv yim ntawm ib tug voltage regulator, uas yog siv los tswj lub regulator hloov nws junction voltage nrog lub input, yog li kho nws cov zis voltage. Tab sis qhov hloov hluav taws xob hloov pauv hloov cov zis hluav taws xob los ntawm kev hloov lub sijhawm rau thiab tawm ntawm lub raj hloov, piv txwv li lub voj voog ua haujlwm.
Lub raj siv rau kev hloov pauv voltage hauv linear fais fab mov ua haujlwm hauv cheeb tsam linear. Raws li txoj cai, hloov hom fais fab mov yog hais txog lub transistor siv rau kev hloov pauv voltage uas ua haujlwm hauv cheeb tsam saturation thiab cutoff, piv txwv li lub xeev hloov.
Cov khoom siv hluav taws xob linear feem ntau kuaj cov zis voltage thiab xa mus rau qhov sib piv voltage amplifier nrog rau qhov siv hluav taws xob. Cov zis ntawm no voltage amplifier ua hauj lwm raws li lub tswv yim ntawm ib tug voltage regulator, uas yog siv los tswj lub regulator hloov nws junction voltage nrog lub input, yog li kho nws cov zis voltage. Tab sis qhov hloov hluav taws xob hloov pauv hloov cov zis hluav taws xob los ntawm kev hloov lub sijhawm rau thiab tawm ntawm lub raj hloov, piv txwv li lub voj voog ua haujlwm.
2, Lub hauv paus ntsiab lus ntawm cov khoom siv hluav taws xob linear: Cov khoom siv hluav taws xob tawm feem ntau suav nrog lub hwj chim zaus transformer, tso zis rectifier lim, tswj Circuit Court, tiv thaiv Circuit Court, thiab lwm yam. Linear fais fab mov yog ib hom fais fab mov uas thawj transforms AC zog los ntawm ib tug transformer, ces rectifies. thiab lim nws los ntawm lub voj voog rectifier kom tau txais qhov tsis ruaj khov DC voltage. Txhawm rau kom ua tiav qhov siab-precision DC voltage, nws yog ib qho tsim nyog los kho qhov tso zis hluav taws xob los ntawm kev tawm tswv yim voltage. Hom kev siv tshuab hluav taws xob no yog qhov paub tab, tuaj yeem ua tiav kev ruaj ntseg, muaj qhov tsawg kawg nkaus ripple, thiab tsis muaj kev cuam tshuam thiab suab nrov ntawm kev hloov hluav taws xob. Txawm li cas los xij, nws qhov tsis zoo yog tias nws yuav tsum muaj lub tshuab loj loj thiab loj, thiab qhov ntim thiab qhov hnyav ntawm qhov yuav tsum tau lim capacitors kuj loj heev. Ntxiv mus, qhov voltage tawm tswv yim Circuit Court ua hauj lwm nyob rau hauv ib tug linear xeev, thiab muaj ib tug tej yam voltage poob rau ntawm kev hloov raj. Thaum tso tawm qhov ua haujlwm loj tam sim no, kev siv hluav taws xob ntawm lub raj hloov siab dhau lawm, kev hloov pauv kev ua haujlwm tsawg, thiab lub dab dej kub loj yuav tsum tau nruab. Hom kev siv fais fab no tsis haum rau cov kev xav tau ntawm cov khoos phis tawj thiab lwm yam khoom siv, thiab yuav maj mam hloov los ntawm cov khoom siv hluav taws xob hloov pauv. 3, Muab piv rau cov khoom siv hluav taws xob hloov pauv: Hloov cov khoom siv hluav taws xob feem ntau suav nrog cov kab hluav taws xob nkag, cov khoom siv hluav taws xob rectifier, inverters, tso zis rectifier lim, tswj circuits, thiab tiv thaiv circuits. Lawv lub luag haujlwm yog:
1. Input power grid filter: tshem tawm kev cuam tshuam los ntawm daim phiaj hluav taws xob, xws li pib lub cev muaj zog, hloov cov khoom siv hluav taws xob, hluav taws xob, thiab lwm yam, thaum tseem tiv thaiv cov suab nrov nrov uas tsim los ntawm kev hloov cov khoom siv hluav taws xob los ntawm kev sib kis mus rau hauv daim phiaj hluav taws xob.
2. Input rectifier lim: Kho thiab lim cov input voltage ntawm daim phiaj fais fab kom muab DC voltage rau lub converter.
3. Inverter: Nws yog ib qho tseem ceeb ntawm kev hloov fais fab mov. Nws converts DC voltage rau hauv high-frequency AC voltage thiab plays lub luag hauj lwm nyob rau hauv cais cov zis ib feem ntawm lub input fais fab mov.
4. Output rectifier lim: Kho thiab lim lub siab zaus AC voltage tso zis los ntawm lub converter kom tau txais qhov xav tau DC voltage, thaum tseem tiv thaiv lub suab nrov ntawm kev cuam tshuam nrog lub load.
5. Tswj Circuit Court: Tshawb xyuas qhov tso zis DC voltage, sib piv nrog qhov siv hluav taws xob, thiab ua kom nrov. Modulate lub mem tes dav ntawm oscillator tswj lub converter kom ruaj khov tso zis voltage.
6. Kev tiv thaiv Circuit Court: Thaum lub tshuab hluav taws xob hloov hluav taws xob tau ntsib overvoltage lossis overcurrent luv luv Circuit Court, kev tiv thaiv Circuit Court nres lub zog hloov hluav taws xob los ntawm kev ua haujlwm los tiv thaiv lub nra thiab lub zog hluav taws xob nws tus kheej.
