Peb txoj hauv kev zoo rau cov cua kub dissipation ntawm lub zog modules
Muaj peb txoj hauv kev rau lub zog hluav taws xob hloov hluav taws xob los ntawm qhov chaw kub kub mus rau qhov kub thiab txias: hluav taws xob, kev sib kis thiab convection.
Radiation: Lub electromagnetic induction hloov ntawm tshav kub generated ntawm ob blocks ntawm txawv kub.
Kev xa mus: Hloov cov cua sov los ntawm cov khoom nruab nrab.
Convection: kub hloov mus los ntawm cov kua nruab nrab (gas)
Nyob rau hauv ntau yam kev siv tshwj xeeb, tag nrho peb txoj hauv kev hloov pauv cua sov feem ntau muaj ntau theem sib txawv. Hauv ntau daim ntawv thov, convection yog qhov tseem ceeb tshaj plaws ntawm kev hloov hluav taws xob. Yog hais tias lwm ob txoj kev cua sov dissipation ntxiv, cov nyhuv tiag tiag yuav zoo dua. Txawm li cas los xij, hauv qee qhov xwm txheej, ob txoj hauv kev no kuj tseem muaj qhov cuam tshuam tsis zoo. Yog li ntawd, thaum tsim ib tug high-zoo tshav kub dissipation system, tag nrho peb lub tshav kub hloov txoj kev yuav tsum tau ua tib zoo xav txog.
Lub zog module
1. Radiation qhov chaw tshav kub dissipation
Thaum ob qhov sib cuam tshuam nrog qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv, nws yuav ua rau cov hluav taws xob txuas ntxiv ntawm cov cua sov.
Qhov kawg cuam tshuam ntawm hluav taws xob ntawm qhov kub ntawm qee yam khoom yog txiav txim siab los ntawm ntau yam: qhov kub ntawm qhov sib txawv ntawm cov khoom sib txawv, kev taw qhia ntawm cov khoom muaj feem xyuam, qhov smoothness ntawm qhov chaw ntawm cov khoom thiab qhov deb ntawm lawv. Vim tias tsis muaj txoj hauv kev los txheeb xyuas cov ntsiab lus no, ntxiv rau kev cuam tshuam ntawm ib puag ncig ib puag ncig' nws tus kheej hluav taws xob kinetic zog pauv, nws yog qhov nyuaj heev los ntsuas qhov teeb meem ntawm hluav taws xob mus rau qhov kub thiab txias, thiab nws yog qhov nyuaj kom raug. xam.
Hauv daim ntawv thov tshwj xeeb ntawm kev hloov hluav taws xob hloov hluav taws xob hloov hluav taws xob tswj module, nws tsis zoo li vam khom tsuas yog rau radiant tshav kub dissipation raws li txoj kev txias ntawm lub converter. Feem ntau, qhov chaw radiant tsuas yog dissipates 10% lossis tsawg dua ntawm tag nrho cov cua sov tsim. Yog li ntawd, radiant tshav kub feem ntau tsuas yog siv los ua ib qho kev pabcuam ntxiv rau cov txheej txheem cua sov tseem ceeb, thiab nws feem ntau tsis suav nrog hauv cov qauv tsim thermal.
Kev cuam tshuam ntawm qhov kub thiab txias ntawm lub hwj huam mov module. Hauv cov ntawv thov tshwj xeeb, qhov ntsuas kub ntawm lub tshuab hloov pauv dav dav tswj tau siab dua li qhov ntsuas kub ntawm lub ntuj.
Yog li ntawd, lub radiant kinetic zog hloov yog conducive rau tshav kub dissipation. Txawm li cas los xij, nyob rau hauv qee qhov xwm txheej, qhov kub ntawm qee qhov chaw cua sov (cov khoom siv hluav taws xob, cov khoom siv hluav taws xob siab, thiab lwm yam) nyob ib ncig ntawm lub module tswj yog siab dua qhov kub ntawm lub hwj chim module, thiab lub radiant tshav kub ntawm cov khoom no yuav ua rau kom qhov kub thiab txias. ntawm kev tswj module.
Nyob rau hauv lub tshav kub dissipation tsim kev npaj, tus txheeb ze txoj hauj lwm ntawm peripheral Cheebtsam ntawm lub converter tswj module yuav tsum tau teem scientifically raws li lub zog uas lub tshav kub tawg yuav ua rau. Thaum cov khoom kub kub nyob ze rau lub converter tswj module, txhawm rau ua kom tsis muaj zog cua sov ntawm cov hluav taws xob hluav taws xob, cov fins nyias ntawm cov hluav taws xob rwb thaiv tsev yuav tsum tau muab tso rau ntawm cov tswj module thiab cov khoom kub.
2. Kev xa tawm cua sov dissipation
Nyob rau hauv ntau daim ntawv thov, lub tshav kub generated ntawm lub hwj chim module substrate yuav tsum tau pauv mus rau ib tug ntev tshav kub dissipation nto los ntawm tshav kub hloov Cheebtsam. Ua li ntawd, qhov kub ntawm lub hwj chim module substrate yuav sib npaug rau qhov sib npaug ntawm qhov kub thiab txias ntawm cov cua kub dissipation nto, qhov kub ntawm cov khoom siv hluav taws xob hloov hluav taws xob, thiab qhov kub ntawm ob qhov chaw. Lub thermal tsis kam ntawm cov khoom siv hluav taws xob hloov hluav taws xob yog proportional rau qhov ntev L ntawm ob, thiab inversely proportional rau qhov chaw hla-sectional thiab kub hloov pauv ntawm ob. Kev siv cov ntaub ntawv tsim nyog thiab cov ntu ntu ntu tuaj yeem txo cov thermal tsis kam ntawm cov khoom siv hluav taws xob. Thaum qhov chaw teeb tsa thiab tus nqi raug tso cai, lub tshuab hluav taws xob uas muaj qhov tsis zoo thermal kuj yuav tsum tau siv. Nws yuav tsum tau muab sau tseg tias yog hais tias lub substrate kub ntawm lub hwj chim module txo me ntsis, lub sij hawm nruab nrab ntawm qhov tsis ua hauj lwm (MTBF) yuav nce ntau.
Cov khoom siv raw rau kev tsim cov dab dej kub yog qhov tseem ceeb uas cuam tshuam rau kev ua haujlwm, yog li koj yuav tsum tau them sai sai rau ntau yam thaum xaiv. Nyob rau hauv ntau daim ntawv thov, cov cua sov tsim los ntawm lub hwj chim module yuav kis tau los ntawm lub substrate mus rau lub dab dej kub los yog lub tshav kub hloov Cheebtsam. Txawm li cas los xij, yuav muaj qhov sib txawv ntawm qhov kub thiab txias ntawm qhov chaw ntawm lub hwj chim module substrate thiab cov khoom siv hluav taws xob hloov hluav taws xob. Hom kub sib txawv no yuav tsum tau tswj. Lub thermal tsis kam yog txuas nrog nyob rau hauv series nyob rau hauv lub tshav kub dissipation tswj voj. Qhov kub ntawm lub substrate yuav tsum yog qhov kub thiab txias ntawm cov khoom siv hluav taws xob. Qhov sib npaug ntawm qhov kub thiab txias. Yog tias nws tsis tswj tau, qhov kub thiab txias ntawm qhov chaw yuav pom tseeb heev. Tag nrho thaj chaw saum npoo yuav tsum loj npaum li qhov ua tau, thiab qhov smoothness ntawm qhov chaw yuav tsum tsis pub dhau 5 mils (0.005 ko taw). Txhawm rau kom zoo dua tshem tawm qhov tsis sib xws ntawm qhov chaw, koj tuaj yeem sau qhov chaw nrog thermal conductive kua nplaum lossis cov ntaub ntawv hloov hluav taws xob. ) Tom qab siv cov kev ntsuas tsim nyog, qhov chaw thermal kuj tuaj yeem raug txo kom qis dua 0.1 ℃ / W. Tsuas yog los ntawm kev txo cov cua sov dissipation thermal resistance (RTH) lossis txo qhov kev siv hluav taws xob (Ploss) tuaj yeem txo qis thiab TAmax tuaj yeem nce ntxiv. Lub zog siab tshaj plaws ntawm cov khoom siv hluav taws xob hloov pauv yog cuam tshuam nrog qhov kub thiab txias ntawm daim ntawv thov scene. Cov tsis tseem ceeb uas cuam tshuam rau cov zis hluav taws xob poob Ploss, thermal resistance RTH thiab qhov siab tshaj plaws hloov fais fab mov Case kub TC. Lub zog hloov hluav taws xob nrog kev ua haujlwm siab thiab zoo tshaj plaws cua sov dissipation yuav muaj qhov kub thiab txias. Ntawm nominal tso zis fais fab tso zis, lawv muaj kub margin. Qhov kub ntawm lub zog hloov hluav taws xob nrog kev ua haujlwm qis dua lossis tsis muaj cua sov dissipation yuav siab dua. Lawv yuav tsum yog cua txias los yog derated rau daim ntawv thov.
3. Convection tshav kub dissipation
Convection Thaum tshav kub kub dissipation yog feem ntau siv cov cua kub dissipation txoj kev rau Epson zog converters. Convection feem ntau muab faib ua ob hom: ntuj convection thiab yuam convection. Kev hloov ntawm cov cua sov los ntawm qhov chaw ntawm qhov kub thaiv mus rau ib puag ncig cov pa zoo li qub nrog qhov kub thiab txias yog hu ua natural convection; kev hloov ntawm tshav kub los ntawm qhov chaw ntawm qhov kub thaiv mus rau cov kua roj yog hu ua yuam convection.
Qhov zoo ntawm ntuj convection yog tias nws yooj yim heev rau kev siv, tsis tas yuav muaj hluav taws xob kiv cua, yog tus nqi qis, thiab muaj kev ntseeg siab hauv cov cua kub dissipation. Txawm li cas los xij, nyob rau hauv sib piv rau yuam convection, thiaj li yuav ua tau zoo tib yam substrate kub, yuav tsum tau ib tug loj kub dab dej.
Tus tsim ntawm ntuj convection radiator yuav tsum tau them sai sai rau cov hauv qab no:
Feem ntau, tsuas yog qhov tseem ceeb ntawm lub dab dej ntsug yog muab rau lub dab dej kub. Qhov tseeb cov cua sov dissipation nyhuv ntawm kab rov tav cua sov dab dej tsis muaj zog. Yog tias xav tau kev teeb tsa kab rov tav, thaj tsam ntawm lub tshuab hluav taws xob yuav tsum tau nce kom tsim nyog, thiab kev quab yuam convection heat dissipation kuj siv tau.
