Qhov zoo thiab qhov tsis zoo ntawm Linear Regulated Power Supplies thiab Switching Power Supplies
Cov khoom siv hluav taws xob tswj hluav taws xob thiab hloov cov khoom siv hluav taws xob yog ob txoj hauv kev sib txawv ntawm kev tsim cov khoom siv hluav taws xob, txhua tus muaj lawv tus kheej cov yam ntxwv, thiab tus neeg nug tsis tau taw qhia seb qhov twg yog qhov sib piv? Lub neej profile, zoo, kev ua tau zoo rau kev thauj khoom? Ripple factor? Los yog qhov hnyav, ntim, muaj peev xwm tiv thaiv kev cuam tshuam, nqi, thiab lwm yam, vim hais tias cov linear tswj fais fab mov thiab hloov fais fab mov muaj lawv tus kheej qhov zoo thiab qhov tsis zoo rau cov ntsuas sib txawv ntawm cov txiaj ntsig sib txawv, cov hauv qab no luv luv piav qhia txog cov yam ntxwv ntawm ob lub zog. khoom siv.
1, linear fais fab mov
Linear fais fab mov voltage tawm tswv yim Circuit Court ua hauj lwm nyob rau hauv lub linear cheeb tsam, lub hauv paus ntsiab lus yog ua ntej los ntawm lub transformer yuav high-voltage alternating tam sim no mus rau hauv ib tug ntau haum low-voltage alternating tam sim no, thiab ces rectified thiab lim rau hauv DC voltage, thiab thaum kawg los ntawm lub regulator Circuit Court tso tawm ib tug ruaj khov DC voltage.
Cov khoom siv hluav taws xob tawm hauv lub sijhawm dhau los tau siv dav, tam sim no cov cuab yeej siv tau zoo heev, nws qhov txiaj ntsig tseem ceeb yog kev ruaj ntseg, me me ripple, lub zog hluav taws xob ripple coefficient sawv cev rau qhov zoo ntawm cov khoom siv hluav taws xob, tam sim no cov khoom siv hluav taws xob linear ripple feem ntau yog. ua tiav hauv qab 5mV, qib siab dua linear fais fab mov ripple tuaj yeem ua tiav hauv qab 0.5mV, thiab cov khoom siv hluav taws xob tawm hauv cov khoom siv high-frequency, yog li yuav luag tsis muaj kev cuam tshuam ntau zaus thiab lub suab nrov nrov. Qhov tsis zoo yog tias qhov ua tau zoo yog qhov tsawg, cov cua sov tsim los ntawm kev hloov lub raj yog qhov loj, qhov ntim loj, loj, tshwj xeeb tshaj yog qhov ntim transformer loj, kuj tseem muaj qhov ntim thiab qhov hnyav ntawm cov lim capacitors kuj loj heev, thiab tsuas tuaj yeem nqis los, tsis txhawb nqa.
2, switching zog mov
Hloov cov khoom siv hluav taws xob muaj ntau heev hauv cov khoom siv hluav taws xob niaj hnub no, xws li lub xov tooj ntawm tes chargers, phau ntawv sau, cov khoom siv hluav taws xob, thiab lwm yam., lub hauv paus ntsiab lus ntawm kev hloov hluav taws xob yog thawj zaug kho los ntawm tus choj rectifier yuav raug kho rau high-voltage DC, thiab Tom qab ntawd los ntawm lub hwj chim mov tsav nti, hloov cov hlab thiab lwm yam khoom ntawm lub high-frequency oscillator Circuit Court kom lub DC voltage hloov mus rau ib tug high-frequency mem tes voltage, hloov mus rau ib tug tso zis AC voltage los ntawm high-frequency transformer thiab ces tom qab. lub rectifier, Lim kom tau txais hluav taws xob tsawg DC voltage.
Qhov zoo ntawm kev hloov hluav taws xob hloov pauv rau qhov me me, lub teeb yuag, kev hloov pauv siab, ntau yam ntawm cov khoom siv hluav taws xob, muaj peev xwm tiv thaiv kev cuam tshuam, tib lub zog hloov hluav taws xob, nws qhov hnyav tsuas yog kwv yees li 25% ntawm linear fais fab mov. , kev hloov dua siab tshiab txog li 70% lossis yog li ntawd, thaum lub zog linear tsuas yog kwv yees li 30%. Qhov tsis zoo: ntau zaus chips nyob rau hauv Circuit Court, ua hauj lwm nyob rau hauv ib tug high-frequency ib puag ncig, high-frequency cuam tshuam thiab high-zaus suab nrov yog loj dua! Ripple yog loj, switching fais fab mov ripple yog feem ntau nyob rau hauv lub 50mV ~ 200mV los yog li ntawd, qhov zoo dua ntawm lub switching fais fab mov ripple yuav ua tau nyob rau hauv 10mV, tab sis qhov nyuaj thiab tus nqi siab! Kuj tseem muaj qhov hloov hluav taws xob hloov hluav taws xob tsim hluav taws xob yog qhov nyuaj, qhov tsis ua haujlwm siab, kev kho thiab kho tsis yooj yim.
Cov ntsiab lus: Nws tuaj yeem pom tias cov khoom siv hluav taws xob tawm thiab hloov hluav taws xob muaj lawv tus kheej qhov zoo thiab qhov tsis zoo, tsuas yog raws li qhov xwm txheej tiag tiag ntawm kev tsom mus rau qhov uas, yog tias cov khoom thauj ntawm cov khoom siv hluav taws xob zoo siab, xws li Qhov yuav tsum tau muaj ntawm ripple yam yog me me, kev cuam tshuam ntau zaus thiab lub suab nrov nrov, thiab lwm yam, cov khoom siv hluav taws xob linear tseem ceeb hauv qhov no, xws li rau lub suab circuitry system, lub zog hluav taws xob ntawm analog input / output system, thiab lwm yam.; Yog hais tias lub ntim, qhov hnyav yuav tsum muaj siab, yooj yim rau nqa, qhov yuav tsum tau muaj kev hloov pauv siab, kev tiv thaiv kev vibration thiab tiv thaiv damping. Kev xav tau rau kev hloov dua siab tshiab ntau dua, muaj peev xwm tiv thaiv kev cuam tshuam, hloov hluav taws xob hloov pauv tseem ceeb. Yog tias tsuas yog los ntawm kev xav txog kev ua tau zoo, kev xaiv ntawm cov khoom siv hluav taws xob linear yog qhov zoo dua, cov khoom siv hluav taws xob linear muaj kev cuam tshuam ntau zaus thiab lub suab nrov me me, ripple kuj me me, qhov kev puas tsuaj ntawm cov khoom me me, kev pab cuam lub neej ntawm lub load yog ntev dua.
