Lub hauv paus ntsiab lus ua haujlwm tseem ceeb ntawm kev hloov hom fais fab mov
MOS cov raj ntawm cov choj sab sauv thiab sab qis tau hloov pauv. Ua ntej, tam sim no ntws mus rau hauv tus choj sab sauv MOS raj, uas siv lub zog cia ntawm lub kauj kom sib sau cov hluav taws xob hauv lub kauj. Thaum kawg, tus choj sab sauv MOS raj raug kaw, thiab tus choj qis MOS raj tau qhib. Lub coil thiab capacitor txuas ntxiv muab lub zog rau sab nraud. Tom qab ntawd tua tus choj qis MOS transistor, thiab tom qab ntawd tig rau ntawm tus choj saum toj kom tso cai rau tam sim no nkag. Rov ua cov txheej txheem no vim tias MOS transistor yuav tsum tau qhib thiab kaw, yog li nws yog hu ua lub zog hloov hluav taws xob.
Txawm li cas los xij, cov khoom siv hluav taws xob linear txawv. Vim tsis muaj kev cuam tshuam kev hloov pauv, cov kav dej xa dej kom tso dej tawm. Yog tias muaj ntau dhau, nws yuav ntws tawm. Qhov no yog qhov peb feem ntau pom hauv qee qhov chaw siv hluav taws xob linear. Mos yeeb nkab ua kom muaj cua sov ntau, thiab tag nrho cov hluav taws xob tsis siv tau hloov mus rau hauv lub zog cua sov. Los ntawm qhov kev xav no, kev hloov pauv kev ua tau zoo ntawm cov khoom siv hluav taws xob linear yog qhov tsawg heev, thiab thaum tshav kub kub siab, lub neej ntev ntawm cov khoom yog khi kom txo qis, uas cuam tshuam rau kev siv kawg.
Qhov sib txawv tseem ceeb ntawm kev hloov cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob linear yog lawv hom kev ua haujlwm.
Cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tawm ua haujlwm hauv lub xeev linear, uas txhais tau hais tias nws ib txwm ua haujlwm thaum siv, ua rau muaj kev ua haujlwm qis, feem ntau ntawm 50 [%] thiab 60 [%]. Nws tseem tuaj yeem hais tias nws yog ib qho zoo linear fais fab mov. Hom kev ua haujlwm ntawm cov khoom siv hluav taws xob linear yuav tsum muaj cov khoom siv hluav taws xob tswj kom hloov nws los ntawm high voltage mus rau qhov tsis tshua muaj hluav taws xob. Feem ntau, nws yog ib qho kev hloov pauv, tab sis kuj tseem muaj lwm yam khoom siv hluav taws xob zoo li KX, uas tuaj yeem tso tawm DC voltage los ntawm kev hloov kho. Nyob rau hauv txoj kev no, nws ntim yuav loj, loj, tsis muaj zog, thiab generates cua sov ntau. Nws kuj muaj nws qhov zoo: me me ripple, hloov tau zoo, thiab tsis tshua muaj kev cuam tshuam sab nraud. Haum rau siv nyob rau hauv analog circuits, ntau yam amplifiers, thiab lwm yam.
Switching fais fab mov. Nws cov khoom siv hluav taws xob ua haujlwm hauv lub xeev hloov pauv (ib qho rau thiab ib qho tawm, ib qho rau thiab ib qho tawm, nrog lub zaus nrawm heev. module fais fab mov yog nruab nrab ntawm 300-500KHz). Nyob rau hauv no txoj kev, nws poob yog me me, efficiency yog siab, thiab kuj muaj ib tug yuav tsum tau rau transformers siv cov ntaub ntawv uas siab magnetic permeability. Muaj me ntsis ntawm tus number case rau nws. Nws transformer tsuas yog ib lo lus me me, nrog kev ua haujlwm ntawm 80% mus rau 90%. Nws tau hais tias qhov zoo tshaj plaws VICOR module hauv Tebchaws Meskas tuaj yeem ncav cuag 99%. Hloov cov khoom siv hluav taws xob muaj kev ua haujlwm siab thiab me me, tab sis piv rau cov khoom siv hluav taws xob linear, lawv cov ripple thiab voltage thiab tam sim no hloov tus nqi luv nqi.
