Dab tsi yog qhov kev faib tawm thiab lub hauv paus ntsiab lus ntawm kev hloov cov khoom siv hluav taws xob?
Lub tshuab hluav taws xob hloov hluav taws xob yog ib qho khoom siv uas siv lub voj voog los tswj lub raj hloov mus rau qhov siab ceev channel rau thiab tawm. Nws converts ncaj qha tam sim no mus rau high-frequency alternating tam sim no thiab muab nws mus rau ib tug transformer rau voltage transformation, yog li tsim cov yuav tsum tau set los yog sets ntawm voltages! Yog vim li cas rau kev hloov mus rau Huawei lub high-frequency AC zog yog hais tias cov efficiency ntawm high-frequency AC nyob rau hauv lub transformer transformation Circuit Court yog ntau dua li ntawm 50HZ. Yog li ntawd, kev hloov pauv hloov pauv tuaj yeem ua rau me me thiab tsis kub heev thaum ua haujlwm! Tus nqi qis heev. Yog tias 50HZ tsis hloov mus rau high-frequency, ces qhov hloov hluav taws xob hloov tsis muaj nuj nqis !! Kev hloov pauv hloov pauv tsis yog qhov tsis meej. Lawv tsuas yog transformers xwb! Qhov no yog switching zog mov. Hloov cov khoom siv hluav taws xob feem ntau tuaj yeem muab faib ua ob hom: cais thiab tsis cais. Hom kev rho tawm yuav tsum muaj qhov hloov pauv hloov pauv, thaum hom tsis cais tawm yuav tsis tas muaj ib qho.
Thaum lub hwj chim zoo ib yam, qhov siab dua qhov hloov zaus, qhov me me ntawm qhov hloov pauv hloov pauv, tab sis qhov siab dua qhov yuav tsum tau ua rau qhov hloov pauv transistor; Qhov thib ob ntawm kev hloov pauv hloov pauv tuaj yeem muaj ntau yam windings lossis ib qho winding nrog ntau cov kais dej kom tau txais cov khoom tsim nyog; Feem ntau, qee qhov kev tiv thaiv hluav taws xob yuav tsum tau ntxiv, xws li tsis muaj kev thauj khoom thiab kev tiv thaiv luv luv, txwv tsis pub nws yuav kub hnyiab tawm qhov hloov hluav taws xob.
Kev faib tawm ntawm Switching Power Supplies
Tib neeg txoj kev hloov hluav taws xob siv thev naus laus zis yog los tsim cov khoom siv hluav taws xob muaj feem cuam tshuam thaum tsim cov tshuab hloov pauv zaus. Kev sib koom ua ke ntawm ob qho kev txhawb nqa kev txhim kho cov khoom siv hluav taws xob hloov mus rau lub teeb, me me, nyias, tsis tshua muaj suab nrov, muaj kev ntseeg siab, thiab tiv thaiv kev cuam tshuam nrog kev loj hlob ntawm ntau tshaj ob tus lej txhua xyoo. Hloov cov khoom siv hluav taws xob tuaj yeem muab faib ua ob pawg: AC / DC thiab DC / DC. DC / DC converters tam sim no tau ua tiav modularization, thiab cov txheej txheem tsim tshuab thiab cov txheej txheem tsim khoom tau paub tab thiab tsim qauv hauv tsev thiab txawv teb chaws, thiab tau lees paub los ntawm cov neeg siv khoom. Txawm li cas los xij, lub modularization ntawm AC / DC, vim nws tus kheej cov yam ntxwv, ntsib ntau txoj kev thiab kev tsim teeb meem hauv cov txheej txheem ntawm modularization. Cov qauv thiab cov yam ntxwv ntawm ob hom kev siv hluav taws xob hloov pauv tau piav qhia hauv qab no.
Kev hloov pauv DC / DC
DC / DC hloov dua siab tshiab yog cov txheej txheem ntawm kev hloov pauv DC qhov hluav taws xob ruaj khov rau hauv qhov sib txawv DC voltage, tseem hu ua DC chopping. Muaj ob txoj hauv kev uas cov choppers ua haujlwm: ib qho yog ua kom lub mem tes dav modulation hom Ts tsis hloov thiab hloov T (universal), thiab lwm yam yog ua kom lub zaus hloov kho hom T tsis hloov thiab hloov T (nruab nrab cuam tshuam).
Cov circuits tshwj xeeb tau muab faib ua pawg hauv qab no:
(1) Buck Circuit Court - ib tug phaw chopper nrog qhov nruab nrab qhov hluav taws xob tso zis Uo me dua lub input voltage Ui thiab tib polarity.
(2) Boost Circuit Court - ib tug boost chopper nrog ib tug nruab nrab tso zis voltage Uo ntau tshaj lub input voltage Ui thiab tib polarity.
(3) Buck Boost Circuit Court - ib pob los yog boost chopper nrog qhov nruab nrab qhov hluav taws xob tso zis Uo ntau dua lossis tsawg dua li qhov input voltage Ui, opposite polarity, thiab inductive kis tau tus mob.
(4) Cuk Circuit Court - ib tug phaw los yog boost chopper nrog qhov nruab nrab cov zis voltage Uo ntau dua los yog tsawg tshaj qhov input voltage UI, opposite polarity, thiab capacitor kis tau tus mob. Niaj hnub no cov tshuab hloov pauv tau ua kom muaj txiaj ntsig zoo hauv DC / DC. VICOR Lub Tuam Txhab hauv Tebchaws Meskas tau tsim thiab tsim ntau yam ECI soft switching DC / DC converters, nrog cov zis siab tshaj plaws ntawm 300W, 600W, 800W, thiab lwm yam. Lub zog sib xws yog (6, 2, 10, 17) W / cm3, thiab qhov ua tau zoo yog (80-90) feem pua . Qhov tseeb high-frequency switching power module RM series launched los ntawm Nyiv lub tuam txhab NemicLambda txais yuav cov tshuab hloov mos, nrog rau kev hloov zaus ntawm (200-300) kHz thiab lub zog ceev ntawm 27 W / cm3. Nws siv synchronous rectifiers (MOS-FET es tsis txhob Schottky diodes), uas txhim kho cov efficiency ntawm tag nrho cov Circuit Court rau 90 feem pua.
