Yam dab tsi yuav tsum tau xav txog hauv kev xaiv cov khoom siv hluav taws xob hloov pauv
Rau cov kws tshaj lij, kev xaiv ntawm kev hloov hluav taws xob hloov hluav taws xob yog txheej txheem uas yuav tsum tau ua kom tiav txhua zaus lawv npaj cov khoom siv hluav taws xob. Nws yog ib qho kev xaiv ib lo lus nug ntawm qhov chaw, tab sis ua ntej xaiv zaum kawg, engineers yuav tsum xav txog ntau yam. Tau kawg, peb xav txog nws thawj lub sijhawm Nws yuav yog lo lus nug ntawm tus nqi. Qhov kuv xav piav qhia hauv tsab xov xwm niaj hnub no yog tias nyob rau hauv tus txheej txheem ntawm kev hloov cov khoom siv hluav taws xob xaiv, ntxiv rau tus nqi, peb yuav tsum tau them sai sai rau qee yam hauv cov khoom hauv thiaj li yuav xaiv cov khoom siv fais fab zoo tshaj plaws.
Hais txog kev xaiv ntawm cov khoom siv hluav taws xob hloov pauv, peb yuav tsum tau ua tib zoo saib thiab xav txog ntau txoj cai. Piv txwv li, tus nqi nominal ntawm kev tuav pov hwm xaim yog 1A, uas yog hais txog lub hom phiaj ntawm 25 degrees, tab sis yog tias cov cuab yeej ua haujlwm ntawm 50 degrees, tus nqi nominal ntawm kev tuav pov hwm xaim yuav qis dua 1A, thiab cov qauv tsim ntawm qhov ntsuas kub yuav tsum. raug xaiv Loj dua. Nyob rau hauv tib txoj kev, 1mH ntawm inductance tsis yog ib txwm 1mH, nws yog nyob ntawm 1kHz, yog tias koj siv nws ntawm 1MHz, tus nqi ntawm 1mH inductance xa los ntawm processor tsis yog 1mH, vim hais tias ntawm 1M inductance coil Distributed capacitance pib. plays lub luag haujlwm loj, uas yuav cuam tshuam qee qhov inductance. Qhov poob ntawm cov lim IL=25dB yog thaum MHz Rs / RL=50 ohms (qhov chaw impedance thiab load impedance), tab sis nyob rau hauv kev xyaum, nws yog ib qho nyuaj rau ua tiav impedance kom tau raws li qhov yuav tsum tau ntawm peb. lim daim ntawv thov, yog li 25dB Qhov kev tso tawm yuav raug txo kom tsawg. Cov hlaws, capacitors, diodes, resistors ... txhua tus muaj cov cai zoo sib xws. Cia peb tham txog cov cai ntawm kev hloov fais fab mov module xaiv uas tsis yog tus nqi. Muaj ntau ntau yam ntawm lub zog modules, xws li flyback, rau pem hauv ntej, thawb-rub, ib nrab-bridge, thiab tag nrho-bridge, txhua tus yog superior nyob rau hauv tej yam ntxwv qhia vim hais tias ntawm nws txawv cov hauv paus ntsiab lus.
Cia peb tham txog cov qauv topological ntawm lwm cov khoom siv hluav taws xob hloov pauv tseem ceeb hauv kev lag luam hluav taws xob. Qhov tso zis hluav taws xob hloov pauv cov yam ntxwv ntawm lub zog xa mus rau pem hauv ntej yog qhov zoo dua, thiab lub peev xwm thauj khoom muaj zog dua, tab sis nws qhov tsis zoo kuj tseem pom tseeb. Ib lub zog loj cia lim inductor thiab lub freewheeling diode yog siv, lub ntim yog loj, thiab rov qab electromotive voltage ntawm thawj kauj ntawm lub transformer yog siab. Cov kev xav tau rau lub raj hloov pauv yog siab (yooj yim rau kev tawg thiab kev puas tsuaj). Lub laub-rub fais fab mov tam sim no cov lus teb ceev ceev yog siab heev, thiab cov yam ntxwv ntawm cov zis hluav taws xob yog qhov zoo heev. Nyob rau hauv tag nrho cov txheej txheem topological, nws yog ib qho kev hloov hluav taws xob nrog qhov kev siv siab tshaj plaws, tsis muaj qhov sib nqus flux to, thiab kev tsav tsheb yooj yim. Tab sis nws qhov tsis zoo yog tias ob lub cuab yeej hloov pauv yuav tsum muaj tus nqi siab tiv thaiv hluav taws xob; muaj ob pawg thawj coils, thiab lub laub-rub hloov fais fab mov nrog lub zog me me yog qhov tsis zoo. Yog hais tias ob qho tib si rau pem hauv ntej converters tsis yog tag nrho symmetrical los yog sib npaug, qhov sib npaug ntawm qhov sib nqus magnetization tom qab ob peb lub voj voog yuav ua rau cov tub ntxhais sib nqus tag nrho, uas ua rau muaj kev cuam tshuam ntau dhau ntawm lub tshuab hluav taws xob ntau zaus, thiab tseem ua rau lub raj hloov pauv. Cov zis hluav taws xob ntawm tus choj hloov hluav taws xob yog qhov loj heev, lub zog ua haujlwm siab heev, tus nqi hluav taws xob tiv thaiv ntawm lub raj hloov hluav taws xob yog qhov qis, thiab cov kauj ruam tseem ceeb ntawm transformer tsuas yog xav tau ib qho winding. Qhov tsis zoo yog tias lub zog qis, yuav muaj ib cheeb tsam semi-conducting, thiab qhov poob yog loj.
Cov teeb meem saum toj no yog tshwm sim los ntawm qhov zoo thiab qhov tsis zoo ntawm nws cov qauv topological. Txawm hais tias peb tuaj yeem suav hais tias lub hwj chim module yog lub thawv dub, qhov no kuj yog ib qho tseem ceeb uas peb yuav tsum tau xyuam xim rau thaum xaiv lub hwj chim. Vim yog cov kev daws teeb meem uas tuaj yeem paub txog tib txoj haujlwm, ib qho tuaj yeem pom tau yooj yim, thiab lwm qhov tuaj yeem pom tau nrog kev siv zog zoo.
Ntxiv nrog rau kev txiav txim siab nws qhov zoo thiab qhov tsis zoo thaum xaiv cov qauv topology, peb kuj yuav tsum txiav txim siab raws li qhov tsis ruaj khov ntawm cov load. Qee qhov loads kuj ruaj khov, thaum qee qhov loads tsis ruaj khov, thiab qee qhov txawm tias tsis muaj load, lossis Full load, lossis lub sijhawm thauj khoom nce, lossis lub sijhawm thauj khoom poob, yog tias muaj teeb meem zoo li no, nws yog qhov zoo tshaj los qhia meej nrog cov fais fab module chaw tsim khoom thiab lees paub tias yuav tsum muaj kev tiv thaiv tsim nyog hauv nws txoj kev npaj, tsis yog txhua lub zog hluav taws xob tuaj yeem ua tiav lub hom phiaj no. Hom load yog li no kuj yog ib qho cuam tshuam. Ordinary modules, uas nws cov zis yog tsim los rau resistive load los ntawm lub neej ntawd, yog hais tias lub load yog rational los yog capacitive load, nws yuav tsum tau muab cais los ntawm lub module chaw tsim tshuaj paus, thiaj li hais tias cov khoom siv sab hauv los yog tsis ntawm lub hwj chim module yuav hloov me ntsis thaum lub cov neeg tsim khoom tawm ntawm lub Hoobkas.
Ntxiv rau cov kev xaiv tseem ceeb saum toj no, peb kuj yuav tsum xav txog qhov hloov pauv zaus, ripple, kev nyab xeeb, thiab lwm yam. thaum xaiv cov khoom siv hluav taws xob hloov pauv. Hloov zaus ntawm lub hwj chim module kuj yuav tsum tau them sai sai rau. Nws tau xaiv qhov kev xaiv ntawm cov lim dej tsis sib xws (kev txiav tawm zaus, kev txiav txim) ntawm cov lim fais fab sab nraud. Lub ripple muaj feem xyuam rau cov qauv topological, tsis muaj peev xwm thiab inductance, thiab lub xeev ntawm lub load. Rau 5v fais fab mov, lub ripple tuaj yeem ncav cuag 50mv, thiab qhov yuam kev ntawm ib qho fais fab mov yog 1 feem pua. Rau cov khoom siv hluav taws xob uas xav tau kev ua haujlwm siab, qhov yuam kev ntawm cov khoom siv hluav taws xob thiab kev nthuav dav Circuit Court Qhov yuam kev ntawm lub teeb liab cable, qhov yuam kev ntawm lub teeb liab cable, qhov yuam kev ntawm qhov sib npaug ntawm AD, tom qab ntau qhov yuam kev tau sau thiab sib sau ua ke, tag nrho qhov yuam kev yuav raug. loj. Txawm hais tias muaj cov txheej txheem lim dej hauv lub tshuab hluav taws xob, seb puas muaj kev ruaj ntseg (tam sim no, rwb thaiv tsev tiv thaiv hluav taws xob, cov av noo yuav tsum), kub nce tus yam ntxwv, hloov lub zog, cov tswv yim voltage hloov pauv, kev tswj tus nqi, thiab lwm yam hauv cov khoom siv. lub zog module nyob, tseem muaj ntau qhov chaw thov. Yog li peb tuaj yeem nkag siab tias kev xaiv ntawm cov khoom siv hluav taws xob hloov pauv tsis yog tsuas yog tus nqi xwb, uas yog qhov taw qhia nkaus xwb uas tsim nyog mloog.
