Lub hauv paus ntsiab lus ntawm linear fais fab mov thiab kev sib piv nrog kev hloov hluav taws xob
Hauv linear fais fab mov
Cov lus qhia luv luv ntawm linear fais fab mov:
Cov khoom siv hluav taws xob tawm yog hloov pauv tam sim no los ntawm kev hloov pauv, thiab tom qab ntawd tau txais qhov tsis ruaj khov DC voltage los ntawm kev kho thiab lim dej ntawm rectifier circuit. 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 ua haujlwm tseem ceeb ntawm qhov pom, lub tshuab hluav taws xob siv hluav taws xob no yog qhov paub tab heev, tuaj yeem ua tiav kev ruaj ntseg, ripple kuj me me, thiab tsis muaj kev cuam tshuam thiab suab nrov nrog kev hloov hluav taws xob. Lub voltage tawm tswv yim Circuit Court ua hauj lwm nyob rau hauv ib tug linear xeev, thiab muaj ib tug tej yam voltage poob ntawm lub regulator raj. Thaum cov zis tam sim no loj, lub hwj chim noj ntawm lub regulator raj yog loj heev thiab cov conversion efficiency yog tsawg.
Linear fais fab mov txhais tau hais tias lub raj siv rau kev hloov hluav taws xob ua haujlwm hauv cheeb tsam linear. Raws li qhov tshwm sim, qhov hloov hluav taws xob hloov pauv txhais tau hais tias lub raj siv rau kev hloov pauv hluav taws xob ua haujlwm hauv cheeb tsam saturation thiab cutoff, uas yog, lub xeev hloov.
Feem ntau, linear fais fab mov kuaj cov zis voltage thiab xa mus rau qhov sib piv voltage amplifier nrog siv voltage. Cov zis ntawm no voltage amplifier yog siv raws li lub tswv yim ntawm lub voltage regulator los tswj lub regulator kom nws junction voltage hloov nrog lub input, thiaj li mus kho nws cov zis voltage. Txawm li cas los xij, cov khoom siv hluav taws xob hloov pauv hloov qhov tso zis hluav taws xob los ntawm kev hloov lub sijhawm rau thiab tawm ntawm cov kav dej tswj, uas yog, lub luag haujlwm piv.
Lub raj siv rau kev hloov pauv voltage ntawm linear fais fab mov ua haujlwm hauv cheeb tsam linear. Raws li qhov tshwm sim, qhov hloov hluav taws xob hloov pauv txhais tau hais tias lub raj siv rau kev hloov pauv hluav taws xob ua haujlwm hauv cheeb tsam saturation thiab cutoff, uas yog, lub xeev hloov.
Feem ntau, linear fais fab mov kuaj cov zis voltage thiab xa mus rau qhov sib piv voltage amplifier nrog siv voltage. Cov zis ntawm no voltage amplifier yog siv raws li lub tswv yim ntawm lub voltage regulator los tswj lub regulator kom nws junction voltage hloov nrog lub input, thiaj li mus kho nws cov zis voltage. Txawm li cas los xij, cov khoom siv hluav taws xob hloov pauv hloov qhov tso zis hluav taws xob los ntawm kev hloov lub sijhawm rau thiab tawm ntawm cov kav dej tswj, uas yog, lub luag haujlwm piv.
Txoj cai ntawm linear fais fab mov:
Linear fais fab mov feem ntau suav nrog fais fab zaus transformer, tso zis rectifier lim, tswj Circuit Court thiab tiv thaiv Circuit Court. Cov khoom siv hluav taws xob tawm yog hloov pauv tam sim no los ntawm kev hloov pauv, thiab tom qab ntawd tau txais qhov tsis ruaj khov DC voltage los ntawm kev kho thiab lim dej ntawm rectifier circuit. 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. Cov cuab yeej siv hluav taws xob no yog qhov paub tab heev, uas tuaj yeem ua tiav kev ruaj ntseg, me me ripple thiab tsis muaj kev cuam tshuam thiab suab nrov nrog kev hloov hluav taws xob. Txawm li cas los xij, nws qhov tsis zoo yog tias nws xav tau lub tshuab hloov pauv loj thiab loj, thiab qhov ntim thiab qhov hnyav ntawm lub lim capacitor 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 ntawm lub regulating raj. Thaum tso tawm qhov ua haujlwm loj tam sim no, lub zog siv hluav taws xob ntawm cov kav dej tswj tau loj dhau, kev hloov pauv kev ua haujlwm tsawg, thiab lub dab dej kub loj tau teeb tsa. Hom fais fab mov 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 kev hloov hluav taws xob. 3. Contrast switching power supply: Switching power supply mas muaj xws li input power grid filter, input rectifier filter, inverter, output rectifier filter, control circuit and tiv thaiv circuit. Lawv lub luag haujlwm yog:
1. Input power grid filter: tshem tawm qhov 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 tawm tsam, thiab lwm yam, thiab tseem tiv thaiv lub suab nrov nrov uas tsim los ntawm kev hloov hluav taws xob los ntawm kis mus rau kab hluav taws xob.
2. Input rectifier lim: lub input voltage ntawm daim phiaj fais fab yog rectified thiab lim kom muab DC voltage rau lub converter.
3. Inverter: Nws yog qhov tseem ceeb ntawm kev hloov fais fab mov. Nws converts DC voltage mus rau high-frequency AC voltage thiab cais cov zis ib feem ntawm lub input fais fab mov.
4. Tso zis rectifier lim: Kho thiab lim lub siab zaus AC voltage tso zis los ntawm lub converter kom tau txais qhov xav tau DC voltage, thiab tib lub sijhawm tiv thaiv kev cuam tshuam ntawm lub suab nrov ntawm lub load.
5. Tswj Circuit Court: txheeb xyuas qhov tso zis DC voltage, piv nrog rau qhov siv voltage thiab amplify nws. Cov mem tes dav ntawm oscillator yog hloov kho los tswj lub converter kom cov zis voltage ruaj khov.
6. Kev tiv thaiv Circuit Court: Thaum lub zog hloov hluav taws xob yog luv luv los ntawm overvoltage thiab overcurrent, kev tiv thaiv Circuit Court nres lub switching fais fab mov los tiv thaiv lub load thiab lub hwj chim mov nws tus kheej.
Switching fais fab mov yog kho alternating tam sim no mus rau hauv ncaj qha tam sim no, ces thim rov qab cov direct tam sim no rau alternating tam sim no, thiab ces rectify thiab tso zis rau hauv qhov yuav tsum tau tam sim no voltage. Nyob rau hauv no txoj kev, lub switching fais fab mov txuag lub transformer nyob rau hauv qis linear fais fab mov thiab lub voltage tawm tswv yim Circuit Court. Lub inverter Circuit Court nyob rau hauv switching fais fab mov yog tag nrho cov kev hloov kho, uas tuaj yeem ua tiav qhov kev hloov kho siab heev.
