Yog vim li cas vim li cas lub switching fais fab mov yog rectified rau DC
Vim li cas qhov hloov hluav taws xob hloov pauv mus rau DC?
Lub tshuab hluav taws xob hloov pauv ua ntej hloov pauv tam sim no mus rau qhov tam sim no ncaj qha los ntawm kev hloov kho ntawm qhov kawg ntawm cov tswv yim, uas yog qhov yuav tsum tau ua ua ntej kom txo qhov loj ntawm cov khoom siv hluav taws xob thiab paub txog kev tswj tsis siv neeg ntawm cov khoom tso tawm (qhov voltage lossis qhov tam sim no).
Nyob rau hauv yav dhau los lub hwj chim transformers, txij li thaum lub khiav hauj lwm zaus tsuas yog 50-60Hz, thiaj li yuav tau txais txaus inductive reactance, nws yog tsim nyog los siv hnyav silicon steel ntawv hlau cores thiab tuab coils. Qhov ntim ntawm 100ⅤA transformer yuav luag sib npaug rau ib nrab ntawm lub cib. Qhov hnyav yog 2 ~ 3Kg.
Yog li ntawd, txo qhov luaj li cas ntawm lub transformer tau dhau los ua tus yuam sij rau lub miniaturization ntawm lub hwj chim mov.
Raws li cov qauv inductive reactance XL=2πfL, nws tuaj yeem pom tau tias kev nce qhov zaus kuj tuaj yeem ua rau qhov inductive reactance nce ntxiv. Tom qab nce qhov zaus, qhov ntim ntawm lub transformer tuaj yeem ua rau me me, thiab tus naj npawb ntawm cov lem ntawm lub kauj kuj txo qis heev.
Yog li ntawd, cov khoom siv hluav taws xob hloov pauv yuav tsum hloov pauv tam sim no mus rau hauv qhov tam sim no ncaj qha, thiab tig mus rau hauv qhov hluav taws xob ntau zaus ntawm ntau kaum ntawm kHz los ntawm lub raj hluav taws xob siab thiab lub voj voog oscillation, thiab tom qab ntawd dhau los ua qhov yuav tsum tau muaj hluav taws xob los ntawm kev hloov pauv.
Thaum lub load ntawm lub hwj chim mov hloov, cov ntaub ntawv ntawm qhov kawg tso zis yuav muab rov qab (lub kaum sab xis ntawm lub hwj huam mov switching ua hauj lwm) mus rau lub oscillator Circuit Court los kho qhov ratio ntawm lub on-off thiab off-lub xeev. qhov hloov.
Lub sijhawm ntawm lub sijhawm ntev thiab lub sijhawm off-lub sijhawm luv luv thaum lub sijhawm thauj khoom hnyav, thiab lub sijhawm luv luv thaum lub sijhawm thauj khoom hnyav. Qhov no paub qhov ruaj khov ntawm qhov tso zis hluav taws xob lossis tam sim no ntawm lub zog hloov hluav taws xob.
Tag nrho cov transistors lub luag hauj lwm rau cov oscillation thiab tsis siv neeg tswj kev khiav hauj lwm yuav tsum tau DC fais fab mov thiab tsim kom muaj ib tug zoo DC khiav hauj lwm taw tes nyob rau hauv thiaj li yuav tswj cov kev ua hauj lwm ntawm lub hwj chim mov. Yog li ntawd, thaum tsim ib lub zog hloov hluav taws xob, thawj zaug hloov pauv tam sim no mus rau qhov tam sim no ncaj qha.
Nyob rau hauv lub switching fais fab mov Circuit Court, muaj electrolytic capacitors, triodes, thiab diodes. Thawj qhov xwm txheej rau lawv ua haujlwm kom raug: qhov zoo thiab qhov tsis zoo ntawm txhua lub ntsiab lus yuav tsum tau lees paub kom zoo ib yam (ntxiv rau qhov zoo lossis qhov tsis zoo).
Yog li ntawd, thaum tsim lub voj voog, muaj peb pawg: zoo, tsis zoo, thiab hauv av. Thaum grounding, nws tuaj yeem txuas nrog tus ncej zoo lossis tus ncej tsis zoo.
Tom qab tag nrho cov Circuit Court yog thaum kawg merged, muaj zoo thiab tsis zoo ncej. Yog li, qhov hloov hluav taws xob hloov pauv yog 220V AC los ntawm lub ntsiab, thiab hloov mus rau DC los ntawm diode rectification los muab lub zog rau hauv Circuit Court.
Lub tshuab hluav taws xob hloov hluav taws xob yog lub zog hluav taws xob uas muab lub zog rau lub nra, thiab cov khoom siv hluav taws xob siv hluav taws xob xav tau DC fais fab mov. Piv txwv li, lub xov tooj ntawm tes yog 4.2-volt DC fais fab mov. Cov tsheb uas siv hluav taws xob feem ntau xav tau 24-volt, 36-volt, thiab 48-volt DC fais fab. Computers feem ntau A 5V, 12V DC fais fab mov yuav tsum tau.
Txij li thaum cov loads tag nrho xav tau ncaj qha tam sim no, lub zog hloov hluav taws xob uas muab lub zog ib txwm xav tau los tso tawm ncaj qha tam sim no.
Qhov saum toj no yog vim li cas vim li cas qhov hloov hluav taws xob yuav tsum tau kho rau hauv DC. Kuv vam tias nws yuav pab tau rau sawv daws.
