Kev piav qhia ntawm cov cua kub dissipation hom ntawm lub zog module
Muaj peb txoj kev tshav kub dissipation rau fais fab modules: convection, conduction, thiab hluav taws xob. Nyob rau hauv kev siv tswv yim, feem ntau ntawm lawv siv convection raws li lub ntsiab cua kub dissipation txoj kev. Yog tias tus qauv tsim tsim nyog, ua ke nrog ob txoj kev tshav kub dissipation ntawm conduction thiab hluav taws xob, cov nyhuv yuav ua kom tiav. Txawm li cas los xij, yog tias tus qauv tsim tsis raug, nws yuav ua rau muaj kev cuam tshuam tsis zoo. Yog li ntawd, thaum tsim ib lub hwj chim module, tsim lub tshav kub dissipation system tau dhau los ua ib qho tseem ceeb txuas.
1. Convection txias txoj kev
Convection heat dissipation yog hais txog kev hloov ntawm cov cua sov los ntawm cov kua nruab nrab cua kom ua tiav cov cua sov dissipation. Nws yog peb txoj kev tshav kub dissipation. Txoj kev convection feem ntau muab faib ua ob hom, yuam convection thiab natural convection. Forced convection yog hais txog kev hloov cov cua sov los ntawm qhov chaw ntawm cov khoom cua sov mus rau cov cua ntws, thiab lub ntuj convection yog hais txog kev hloov cov cua sov los ntawm qhov chaw ntawm cov khoom cua sov mus rau cov huab cua nyob ib puag ncig ntawm qhov kub thiab txias. Qhov zoo ntawm kev siv natural convection yog kev siv yooj yim, tus nqi qis, tsis xav tau lub kiv cua txias sab nraud, thiab muaj kev ntseeg siab. Yuav kom yuam convection kom ncav cuag lub substrate kub rau ib txwm siv, nws yuav tsum tau ib tug loj lub dab dej kub thiab yuav siv sij hawm qhov chaw.
Them mloog mus rau tus tsim ntawm ntuj convection radiator. Yog hais tias kab rov tav radiator muaj cov cua kub dissipation tsis zoo, thaj tsam ntawm lub tshuab hluav taws xob yuav tsum tau ua kom tsim nyog los yog yuam kom convection kom dissipate cua sov thaum ntsia horizontally.
2. Kev siv hluav taws xob dissipation
Thaum siv lub hwj chim module, lub tshav kub ntawm lub substrate yuav tsum tau ua nyob rau hauv lub tshav kub dissipation nto los ntawm lub tshav kub-conducting lub caij, thiaj li hais tias qhov kub ntawm lub substrate yuav sib npaug zos rau cov sum ntawm qhov kub ntawm lub tshav kub dissipating. nto, qhov kub thiab txias ntawm cov khoom siv hluav taws xob, thiab qhov kub thiab txias ntawm ob qhov chaw sib cuag. Nyob rau hauv txoj kev no, lub zog cua sov tuaj yeem hloov pauv hauv qhov chaw zoo kom ntseeg tau tias cov khoom tuaj yeem ua haujlwm ib txwm. Lub thermal tsis kam ntawm cov khoom thermal yog ncaj qha proportional rau qhov ntev, thiab inversely proportional rau nws cross-sectional cheeb tsam thiab thermal conductivity. Yog tias qhov chaw teeb tsa thiab tus nqi tsis raug txiav txim siab, lub tshuab hluav taws xob uas muaj qhov thermal tsawg tshaj plaws yuav tsum tau siv. Vim tias qhov kub thiab txias ntawm cov khoom siv hluav taws xob poob qis me ntsis, lub sijhawm nruab nrab ntawm kev ua tsis tiav yuav zoo dua, kev ruaj ntseg ntawm cov khoom siv hluav taws xob yuav raug txhim kho, thiab lub neej kev pab yuav ntev dua.
Qhov kub thiab txias yog qhov tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm lub zog hluav taws xob, yog li thaum xaiv lub tshuab hluav taws xob, koj yuav tsum tsom mus rau nws cov khoom tsim khoom. Hauv kev siv tswv yim, cov cua sov tsim los ntawm lub module yog ua los ntawm substrate mus rau lub dab dej kub los yog cov khoom siv hluav taws xob. Txawm li cas los xij, yuav muaj qhov sib txawv ntawm qhov kub thiab txias ntawm qhov chaw sib cuag ntawm lub hwj chim substrate thiab cov khoom siv hluav taws xob, thiab qhov kub ntawm qhov sib txawv yuav tsum tau tswj. Qhov kub ntawm lub substrate yuav tsum yog qhov sib npaug ntawm qhov kub thiab txias ntawm qhov chaw sib cuag thiab qhov kub ntawm cov khoom siv hluav taws xob. Yog tias nws tsis tswj tau, qhov kub thiab txias ntawm qhov chaw sib cuag yuav yog qhov tseem ceeb. Yog li ntawd, thaj tsam ntawm qhov chaw sib cuag yuav tsum loj npaum li qhov ua tau, thiab qhov smoothness ntawm qhov chaw sib cuag yuav tsum tsis pub dhau 5 mils, uas yog, nyob rau hauv 0.005 ntiv tes.
Txhawm rau tshem tawm qhov tsis sib xws ntawm qhov chaw, qhov chaw sib cuag yuav tsum tau ntim nrog cov kua nplaum thermal lossis thermal pad. Tom qab siv cov kev ntsuas tsim nyog, qhov thermal kuj ntawm qhov chaw tiv tauj tuaj yeem raug txo kom qis dua 0.1 ° C / W. Tsuas yog los ntawm kev txo cov cua sov dissipation thiab thermal tsis kam lossis kev siv hluav taws xob tuaj yeem txo qhov kub thiab txias. Qhov siab tshaj plaws tso zis hluav taws xob ntawm cov khoom siv hluav taws xob muaj feem cuam tshuam rau daim ntawv thov ib puag ncig kub. Cov kev cuam tshuam cuam tshuam feem ntau suav nrog: lub zog poob, thermal tsis kam thiab qhov siab tshaj plaws ntawm cov khoom siv hluav taws xob kub. Cov khoom siv hluav taws xob nrog kev ua haujlwm siab thiab kev ua kom sov zoo dua yuav muaj qhov ntsuas kub qis dua, thiab lawv qhov ntsuas kub siv tau yuav muaj cov npoo ntawm qhov ntsuas hluav taws xob tso tawm. Cov khoom siv hluav taws xob nrog kev ua haujlwm qis dua lossis tsis muaj cua sov dissipation yuav muaj qhov kub siab dua vim lawv xav tau cua txias lossis yuav tsum tau derated rau kev siv.
3. Radiation tshav kub dissipation txoj kev
Radiation heat dissipation yog qhov hloov pauv ntawm cov hluav taws xob sib txuas ntawm cov cua sov uas tshwm sim thaum ob qhov sib cuam tshuam nrog qhov sib txawv ntawm qhov sib txawv. Kev cuam tshuam ntawm hluav taws xob ntawm qhov kub ntawm ib qho khoom yog nyob ntawm ntau yam, xws li qhov kub ntawm qhov sib txawv ntawm ntau yam khoom, sab nraud ntawm cov khoom, txoj hauj lwm ntawm cov khoom thiab qhov deb ntawm lawv. Hauv kev siv tswv yim, cov xwm txheej no nyuaj rau kev suav, thiab ua ke nrog kev cuam tshuam ntawm ib puag ncig ib puag ncig' nws tus kheej radiant zog pauv, nws yog ib qho nyuaj rau xam kom raug qhov cuam tshuam ntawm hluav taws xob ntawm qhov kub thiab txias.
Hauv kev siv cov tswv yim, nws tsis tuaj yeem siv hluav taws xob los siv hluav taws xob hluav taws xob hluav taws xob ib leeg, vim tias txoj kev no feem ntau tuaj yeem tsuas yog dissipate 10% lossis tsawg dua ntawm tag nrho cov cua sov. Nws feem ntau yog siv los ua tus pab txhais tau tias ntawm lub ntsiab cua kub dissipation txoj kev thiab feem ntau tsis suav hais tias hauv thermal tsim. Nws cuam tshuam rau qhov kub thiab txias. Hauv kev ua haujlwm ntawm lub zog hluav taws xob, nws qhov kub thiab txias feem ntau yog siab dua qhov kub ntawm qhov chaw sab nraud, thiab cov hluav taws xob hloov hluav taws xob pab kom tag nrho cov cua sov dissipation. Txawm li cas los xij, nyob rau hauv cov xwm txheej tshwj xeeb, cov khoom siv hluav taws xob nyob ze ntawm lub zog hluav taws xob, xws li cov khoom siv hluav taws xob siab, cov khoom siv hluav taws xob, thiab lwm yam, cov hluav taws xob ntawm cov khoom no yuav ua rau qhov kub thiab txias ntawm lub hwj huam mov module nce.
