Kev faib tawm ntawm kev hloov hluav taws xob, kev piav qhia ntxaws ntawm AD / DC thiab DC / DC fais fab mov.
Classification ntawm switching fais fab mov
Tib neeg txoj kev ua haujlwm ntawm kev hloov hluav taws xob yog los tsim cov khoom siv hluav taws xob muaj feem xyuam nrog thaum tsim cov tshuab hloov pauv zaus. Ob qho tib si txhawb kev txhim kho ntawm kev hloov hluav taws xob hauv kev taw qhia ntawm lub teeb, me me, nyias, tsis tshua muaj suab nrov, muaj kev ntseeg siab thiab tiv thaiv kev cuam tshuam nrog kev loj hlob txhua xyoo ntawm ntau tshaj ob tus lej. Hloov fais fab mov tuaj yeem muab faib ua ob pawg: AC / DC thiab DC / DC. DC / DC converter tau raug hloov kho, thiab cov txheej txheem tsim thiab cov txheej txheem tsim khoom tau ua tiav thiab tsim qauv hauv tsev thiab txawv teb chaws, thiab tau lees paub los ntawm cov neeg siv khoom. Txawm li cas los xij, qhov modularization ntawm AC / DC tau ntsib teeb meem kev siv tshuab thiab kev tsim khoom ntau dua hauv cov txheej txheem ntawm modularization vim nws tus yam ntxwv. Cov qauv thiab cov yam ntxwv ntawm ob hom kev siv hluav taws xob hloov pauv tau piav qhia hauv qab no.
2.1 DC / DC hloov pauv
DC / DC hloov dua siab tshiab yog hloov pauv DC qhov hluav taws xob ruaj khov rau hauv qhov sib txawv DC voltage, tseem hu ua DC chopping. Chopper ua hauj lwm nyob rau hauv ob txoj kev, ib tug yog hais tias mem tes dav modulation hom Ts tseem unchanged, hloov ton (universal), thiab lwm yam yog hais tias zaus modulation hom ton tseem unchanged, hloov Ts (nyem rau cuam tshuam). Nws cov Circuit Court tshwj xeeb muaj xws li cov hauv qab no:
(1) Buck Circuit Court-step-down chopper, uas nws cov zis nruab nrab voltage Uo tsawg dua qhov input voltage Ui thiab muaj tib polarity.
(2) Boost Circuit Court-boost chopper, uas nws cov zis nruab nrab voltage Uo yog ntau tshaj qhov input voltage Ui, thiab polarity yog tib yam.
(3) Buck-Boost Circuit Court-puas los yog boost chopper, uas nws cov zis nruab nrab voltage Uo yog ntau dua los yog tsawg tshaj qhov input voltage Ui, nrog opposite polarity thiab inductive kis tau tus mob.
(4) Cuk circuit-step-down los yog step-up chopper, uas nws cov zis nruab nrab voltage Uo yog ntau dua los yog tsawg tshaj qhov input voltage UI, nrog opposite polarity thiab capacitive kis tau tus mob.
Niaj hnub no, cov cuab yeej siv hluav taws xob hloov pauv tau ua kom muaj txiaj ntsig zoo hauv DC / DC. Ntau ECI soft-switching DC / DC converters tsim thiab tsim los ntawm VICOR tuam txhab nyob rau hauv lub tebchaws United States muaj * loj tso zis hwj chim ntawm 300W, 600W thiab 800W, thiab cov coj lub zog densities yog (6, 2, 10, 17) W / cm3, thiab qhov ua tau zoo yog (80-90)%. Lub tshuab hluav taws xob hloov hluav taws xob ntau zaus RM series nrog cov tshuab hloov pauv tsis ntev los no tau qhia los ntawm NemicLambda Tuam Txhab ntawm Nyij Pooj muaj qhov hloov pauv zaus ntawm (200 ~ 300) kHz thiab lub zog ceev ntawm 27 W / cm3. Lub synchronous rectifier (MOS-FET es tsis txhob Schottky diode) yog saws, uas txhim kho cov efficiency ntawm tag nrho cov Circuit Court rau 90%.
2.2 AC / DC hloov pauv
AC / DC hloov dua siab tshiab hloov AC rau DC, thiab nws cov kev taw qhia fais fab tuaj yeem ua ob txoj kev. Lub zog ntws los ntawm lub zog xa mus rau qhov chaw thau khoom hu ua "rectification", thiab lub zog ntws los ntawm kev thauj khoom mus rau lub zog hluav taws xob hu ua "active inverter". Cov tswv yim ntawm AC / DC converter yog 50 / 60Hz AC, yog li nws yuav tsum tau kho thiab lim, yog li yuav tsum muaj cov lim dej loj loj. Nyob rau tib lub sijhawm, vim muaj kev txwv ntawm cov qauv (xws li UL, CCEE, thiab lwm yam) thiab EMC cov lus qhia (xws li IEC, FCC, CSA), EMC lim yuav tsum tau ntxiv rau AC input sab thiab cov khoom ua raws li thawj. tus qauv yuav tsum tau siv, uas txwv qhov miniaturization ntawm AC / DC fais fab mov. Vim hais tias ntawm sab hauv siab zaus, siab voltage thiab siab tam sim no hloov qhov kev txiav txim, nws yog qhov nyuaj dua los daws qhov teeb meem EMC electromagnetic compatibility, uas kuj tso siab rau cov kev xav tau siab rau sab hauv high-density installation Circuit Court tsim. Rau tib lub laj thawj, qhov hloov hluav taws xob siab thiab siab tam sim no nce lub zog siv thiab txwv cov txheej txheem modularization ntawm AC / DC converter. Yog li ntawd, txoj kev tsim kho kom zoo ntawm lub zog yuav tsum tau txais kev pom zoo kom ua tiav qee qhov kev txaus siab.
AC / DC hloov dua siab tshiab tuaj yeem muab faib ua ib nrab-yoj Circuit Court thiab puv-yoj Circuit Court raws li kev xaim ntawm lub voj voog. Raws li tus naj npawb ntawm lub zog theem, nws tuaj yeem muab faib ua ib zaug, peb theem thiab ntau theem. Raws li kev ua haujlwm quadrant ntawm lub voj voog, nws tuaj yeem muab faib ua ib lub quadrant, ob quadrant, peb quadrant thiab plaub quadrant.
