Thermal Core:Aluminium vs. Copper Substrates hauv LED TeebKev ua tau zoo
Nyob rau hauv qhov tsis tu ncua nrhiav kev ua tau zoo thiab kev ua haujlwm ntev hauv LED teeb pom kev zoo, kev tswj xyuas thermal sawv ua ib qho kev sib tw tseem ceeb tshaj plaws engineering. Lub substrate- cov khoom siv uas cov chips LED tau teeb tsa- ua raws li cov tub rog pem hauv ntej hauv kev sib ntaus sib tua, lub luag haujlwm rau nrawm nrawm nrawm ntawm qhov sib txuas ntawm cov khoom siv hluav taws xob. Kev xaiv ntawm ob qho khoom tseem ceeb, txhuas thiab tooj liab, yog qhov kev txiav txim siab tseem ceeb uas sib npaug ntawm kev ua haujlwm, nqi, thiab kev siv. Kev nkag siab txog lawv qhov sib txawv yog qhov tseem ceeb rau kev qhib qhov zoo tshaj plaws LED tsim.
Qhov Tseem Ceeb Qhov txawv: Ib nqe lus nug ntawm Thermal Conductivity
Qhov tseem ceeb sib txawv yog nyob rau hauv lawv lub peev xwm los ua cua sov, ntsuas raws li thermal conductivity (W / mK).
Tooj:Yog tus superior raw conductor ntawm tshav kub. Nrog thermal conductivity ntawm kwv yees li400 W/mK, nws outperforms txhuas nyob rau hauv txav thermal zog ntawm point A mus rau point B.
Aluminium:Tseem yog ib qho zoo heev thermal conductor, tab sis tsawg dua li tooj liab, nrog rau thermal conductivity ntawm txog205-250 W / mK(nyob ntawm cov alloy).
Cov ntaub ntawv nyoos no qhia meej meej yeej. Txawm li cas los xij, qhov tseeb ntawm LED substrate kev ua tau zoo nyob deb dua nuanced thiab koom nrog kev sib cuam tshuam ntawm lwm yam.
Case rauAluminium Substrates (Aluminium Core PCBs - MCPCBs)
Aluminium yog tus qauv kev lag luam uas tsis muaj teeb meem rau feem coob ntawm kev lag luam thiab kev lag luam LED.
Qhov zoo:
Tus nqi -Kev ua tau zoo:Aluminium tsis tshua kim dua tooj liab. Rau siab - ntim ntau lawm khiav ntawm lub teeb (piv txwv li, qhov muag teev, troffers, batten lights), qhov kev sib txawv ntawm tus nqi no txhais mus rau hauv kev txuag nyiaj ntau thiab cov khoom sib tw zaum kawg.
Lub teeb:Aluminium yog li ntawm ib nrab tuab li tooj liab (2.7 g / cm³ vs . 8.96 g / cm³). Qhov kev txo qhov hnyav no yog qhov tseem ceeb rau kev tsim kho tag nrho, tus nqi thauj khoom, thiab cov ntawv thov uas qhov hnyav yog qhov kev txhawj xeeb, xws li tshem tawm cov vaj huam sib luag lossis loj - cheeb tsam fixtures.
Kev ua tau zoo txaus:Rau feem ntau cov ntawv thov, aluminium muab ntau tshaj li kev tswj hwm thermal. Niaj hnub nimno siab- lumen LED pob khoom yog tsim los ua haujlwm zoo nrog txhuas substrates, ua tiav lub neej muaj txiaj ntsig zoo thaum ua ke nrog cov cua sov thib ob zoo.
Easier Machining thiab Fabrication:Aluminium yog yooj yim dua rau stamp, shear, thiab tshuab dua tooj liab, yooj yim rau kev tsim cov txheej txheem rau hlau -core PCB thiab qhov kawg heatsink los ua ke.
Qhov tsis zoo:
Tsawg Thermal conductivity:Qhov no yog nws qhov kev txwv tseem ceeb. Nyob rau hauv siab heev - fais fab - daim ntawv thov ceev (xws li, tsheb headlights, theem teeb pom kev zoo, siab-flashlights), txhuas tuaj yeem ua lub hauv paus caj dab, ua rau muaj qhov kub thiab txias dua thiab ua kom lub lumen txo qis.
CTE tsis sib haum:Aluminium's Coefficient of Thermal Expansion (CTE) yog ntxiv los ntawm cov ceramic -raws li LED nti thiab PCB dielectric txheej tshaj tooj liab. Thaum tswj hwm los ntawm engineering, qhov no tuaj yeem tsim kev ntxhov siab ntau dua thaum lub sij hawm thermal cycling, muaj feem cuam tshuam rau lub sijhawm ntev - kev cia siab rau hauv cov tshuab tsim tsis zoo.
Case rau tooj liab substrates
Copper yog qhov kev xaiv zoo tshaj plaws, tshwj tseg rau cov ntawv thov uas qhov kev ua haujlwm thermal tsis yog - qhov tseem ceeb ntawm kev sib tham.
Qhov zoo:
Superior Thermal Performance:Cov conductivity siab dua tso cai rau kom nrawm dua sab nraud ntawm tshav kub. Qhov no tiv thaiv kev tsim ntawm thaj chaw "kub qhov chaw" ncaj qha nyob rau hauv siab - zog LED chips. Qhov no ua rau qis dua thermal gradient thoob plaws lub rooj tsavxwm thiab qis dua tag nrho LED hlws ris kub (Tj), uas yog lub hom phiaj kawg rau kev ua kom muaj sia nyob ntev thiab tswj lub teeb pom kev zoo.
Zoo dua CTE Match:Copper's CTE yog ze rau ntawm cov khoom siv semiconductor hauv LED thiab dielectric txheej. Qhov no txo qis kev ntxhov siab ntawm cov pob qij txha thaum lub zog caij tsheb kauj vab (qhib / tawm), ua kom muaj kev ntseeg siab ntev ntev thiab txo qhov kev pheej hmoo ntawm kev ua tsis tiav.
Thinner Profiles:Vim tias tooj liab muaj txiaj ntsig zoo, cov txheej txheej nyias nyias tuaj yeem ua tiav cov txiaj ntsig zoo ib yam li cov txheej txhuas tuab. Qhov no tso cai rau cov neeg tsim qauv tsim kom muaj kev sib txuam ntau dua, slimmer luminaires yam tsis muaj kev ua kom txias txias.
Qhov tsis zoo:
Tus nqi:Tooj liab yog qhov tseem ceeb tshaj qhov tsis zoo. Tus nqi raw khoom yog 2-3 npaug ntawm txhuas, ua tooj liab substrates txwv tsis pub kim rau cov neeg siv khoom kim heev thiab cov khoom siv teeb pom kev zoo.
Qhov hnyav:The high density makes fixtures substantially heavier, which can complicate mechanical design and increase shipping costs.
Oxidation thiab Manufacturing:Copper oxidizes yooj yim, uas tuaj yeem cuam tshuam cov txheej txheem kev sib txuas rau cov txheej txheem dielectric thiab xav tau kev kho deg ntxiv. Nws kuj yog ib qho nyuaj rau tshuab thiab ua hauj lwm nrog ntau tshaj li txhuas.
Kev daws teeb meem Hybrid thiab kev muaj tiag
Txhawm rau txuas qhov sib txawv no, ib qho kev daws teeb meem zoo tshaj plaws yog qhovhybrid mus kom ze. Feem ntau siab -kev ua tau zoo LED teeb tsis siv cov tooj liab ntshiab substrate. Hloov chaw, lawv siv ib qhoaluminium -raws li heatsinknrog ame me, embedded tooj liab core los yog tooj liab inlayncaj qha nyob rau hauv cheeb tsam LED mounting. Qhov kev siv zoo ntawm tooj liab no ua "thermal accelerator," nrawm nrawm nrawm, kub siab los ntawm LEDs, uas tom qab ntawd ua kom muaj txiaj ntsig zoo los ntawm qhov loj dua, tus nqi ntau dua - ua tau zoo txhuas lub cev. Qhov no ua tiav nyob ze - tooj liab kev ua tau zoo ntawm ib feem ntawm tus nqi thiab qhov hnyav.
Xaus: Ib Daim Ntawv Thov
Kev xaiv ntawm txhuas thiab tooj liab tsis yog hais txog kev nrhiav cov khoom siv "zoo tshaj" thoob ntiaj teb, tab sis hais txog kev xaiv cov cuab yeej zoo rau txoj haujlwm.
Aluminium Substratesyog cov neeg ua haujlwm. Lawv yog cov rational, economical xaiv rau90% ntawm LED daim ntawv thov, suav nrog cov teeb pom kev zoo hauv tsev, chaw ua haujlwm luminaires, txoj kev teeb, thiab siab -bay fixtures, qhov sib npaug ntawm kev ua tau zoo, nqi, thiab qhov hnyav txaus txaus.
Copper Substrates(los yog hybrid daws) yog cov cuab yeej tshwj xeeb. Lawv yog indispensable nyob rau hauv scenarios qhov twgextreme power density, minimal space, or absolute maximum reliabilityyog qhov tseem ceeb. Qhov no suav nrog cov teeb pom kev zoo hauv tsheb, siab - theem kawg thiab cov khoom siv hauv studio, cov teeb pom kev kho mob tshwj xeeb, thiab cov ntawv thov uas tsis ua haujlwm tsis yog qhov kev xaiv thiab tus nqi them nqi yog tsim nyog.
Thaum kawg, kev hloov pauv ntawm ob qho khoom siv txuas ntxiv mus thawb cov ciam teb ntawm LED thev naus laus zis, ua kom lub zog ci dua, ua haujlwm zoo dua, thiab ntev dua - teeb pom kev zoo uas ci ntsa iab peb lub ntiaj teb. Kev sib tw ntawm lawv tsis yog kev sib ntaus sib tua tab sis kev sib koom ua ke, tsav kev tsim kho tshiab hauv kev tswj xyuas thermal los ntawm qib nti nce.
