Lub ntsiab ua haujlwm tseem ceeb ntawm kev hloov hluav taws xob
Lub hauv paus ntsiab lus ua haujlwm tseem ceeb ntawm kev hloov pauv hluav taws xob yog qhov MOS cov kav hlau txuas rau sab sauv thiab sab qis yog sib txuas. Ua ntej, tam sim no ntws mus rau hauv MOS raj ntawm tus choj sab saud, thiab kev ua haujlwm ntawm lub kauj yog siv los sau cov hluav taws xob hauv lub kauj. Thaum kawg, MOS raj ntawm tus choj sab saud raug muab tua, thiab MOS raj ntawm tus choj qis yog 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. Qhov no rov ua dua vim tias MOS transistor yuav tsum tau qhib thiab tawm, yog li nws yog hu ua switching power supply.
Txawm li cas los xij, cov khoom siv hluav taws xob linear txawv. Yog tias tsis muaj kev cuam tshuam ntawm kev hloov pauv, cov kav dej xa dej tas li tso dej tawm, thiab yog tias muaj ntau dhau, nws yuav tawm. Qhov no yog qhov peb feem ntau pom hauv qee qhov chaw siv hluav taws xob, qhov twg Mos yeeb nkab ua kom muaj cua sov ntau, thiab tag nrho cov hluav taws xob tsis siv tau hloov mus rau hauv thermal zog. Los ntawm qhov kev xav no, kev hloov pauv kev ua haujlwm ntawm cov khoom siv hluav taws xob hauv hluav taws xob tsawg heev, thiab thaum tshav kub kub siab, lub neej ntev ntawm cov khoom yog khi kom txo qis, 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 tawm hluav taws xob ua haujlwm hauv lub xeev linear, uas txhais tau hais tias nws ib txwm ua haujlwm thaum siv, ua rau kev ua haujlwm qis, feem ntau ntawm 50 [ feem pua ] thiab 60 [ feem pua]. 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 qhov hloov hluav taws xob hloov pauv los ntawm qhov hluav taws xob siab mus rau qhov tsis tshua muaj hluav taws xob. Feem ntau, nws yog ib qho kev hloov pauv, tab sis kuj tseem muaj lwm hom KX cov khoom siv hluav taws xob uas tso tawm DC voltage los ntawm kev hloov kho. Nyob rau hauv txoj kev no, nws lub ntim ua loj, loj, tsis muaj zog, thiab ua kom muaj 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 lub tshuab 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 ceev heev. Feem ntau, zaus ntawm lub vaj huam sib luag hloov hluav taws xob yog nruab nrab ntawm 100-200KHz, thiab ntawm module fais fab mov yog nruab nrab ntawm 300-500KHz). Nyob rau hauv txoj kev no, qhov poob yog me me, qhov ua tau zoo yog siab, thiab tseem muaj qhov yuav tsum tau ua rau lub transformer siv cov ntaub ntawv nrog siab sib nqus 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 feem pua rau 90 feem pua. Nws tau hais tias qhov zoo tshaj plaws VICOR module hauv Tebchaws Meskas yog siab li 99 feem pua. 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.
