Cov ntaub ntawv tshawb pom los ntawm ib lub teeb ci LED ntawm lub rooj tsav xwm laus yuav tsum sib txawv me ntsis ntawm cov ntaub ntawv tshawb pom thaum lub teeb ci LED tau sib sau ua ke rau hauv LED vaj huam sib luag teeb rau kev laus. Qhov loj ntawm qhov sib txawv no nyob ntawm qhov hluav taws xob tsis zoo ntawm LED vaj huam sib luag lub teeb thiab qhov tsim ntawm lub luminaire, nrog rau ib puag ncig uas siv lub luminaire.
Ua ntej ntawm tag nrho cov, hom LED dawb lub teeb xaiv.
Qhov no yog qhov tseem ceeb heev, thiab qhov zoo ntawm LED teeb qhov chaw tuaj yeem hais tias yog qhov tseem ceeb heev. Piv txwv li, tib lub teeb dawb LED, uas yog sawv cev los ntawm 14mil dawb lub teeb ntu nti ntawm Epistar, yog encapsulated nrog zoo tib yam epoxy resin primer, dawb lub teeb kua nplaum thiab ntim kua nplaum. Tom qab 1, 000 teev, cov ntaub ntawv attenuation yog 70 feem pua lub teeb lwj; yog tias nws tau ntim nrog Class D cov kua nplaum uas tsis muaj roj, nyob rau hauv tib qhov chaw laus, lub teeb lwj rau 1,000 teev yog 45 feem pua; yog tias nws tau ntim nrog Class C cov kua nplaum uas tsis muaj roj, nyob rau hauv tib qhov chaw laus, 1000- teev lub teeb lwj yog 12 feem pua; yog B-hom kua nplaum uas muaj roj tsawg yog encapsulated, nyob rau tib qhov chaw laus, qhov 1000- teev lub teeb lwj yog -3 feem pua ; yog cov kua nplaum A-hom roj tsawg, nyob rau tib qhov chaw laus, 1, 000 teev lub teeb Qhov poob yog -6 feem pua .
Vim li cas cov txheej txheem ntim khoom sib txawv ua rau muaj qhov sib txawv loj?
Ib qho ntawm cov laj thawj tseem ceeb yog tias LED chips ntshai tshav kub. Qee zaus raug cua sov ntau dua 100 degrees hauv lub sijhawm luv luv, tsis muaj teeb meem, kuv ntshai tias nws yuav ua rau muaj kev puas tsuaj loj rau LED nti yog tias nws raug kub hnyiab tau ntev.
Feem ntau hais lus, thermal conductivity ntawm epoxy resin zoo tib yam yog me me heev. Yog li ntawd, thaum LED nti yog teeb thiab ua haujlwm, LED nti yuav tawm cua sov, thiab cov thermal conductivity ntawm epoxy resin zoo tib yam yog txwv. Thaum qhov ntsuas kub ntawm LED bracket yog ntsuas sab nraud mus rau 45 degrees, qhov kub thiab txias ntawm cov nti hauv lub teeb dawb LED tuaj yeem tshaj 80 degrees. Qhov kub ntawm lub LED yog tiag tiag 80 degrees, yog li thaum LED nti ua haujlwm ntawm qhov kub thiab txias ntawm qhov sib txuas, nws raug tsim txom heev, uas ua rau cov laus ntawm LED dawb lub teeb.
Thaum lub LED nti ua haujlwm, qhov nruab nrab kub ua rau kub siab ntawm 100 degrees, thiab nws tuaj yeem dissipate 98 feem pua ntawm cov cua sov tam sim ntawd los ntawm cov pins bracket, yog li txo cov cua sov puas rau nws. Yog li ntawd, thaum qhov kub thiab txias ntawm LED dawb lub teeb bracket yog 60 degrees, lub hauv paus kub ntawm nws nti yuav tsuas yog 61 degrees.
Nws tuaj yeem pom los ntawm cov ntaub ntawv saum toj no uas qhov kev xaiv ntawm LED dawb lub teeb ntim txheej txheem ncaj qha txiav txim siab lub teeb tawg ntawm LED teeb.
Qhov thib ob, qhov chaw ua haujlwm kub ntawm LED teeb hlaws.
Raws li cov ntaub ntawv kev laus ntawm ib lub teeb dawb LED, yog tias tsuas yog ib qho LED dawb lub teeb ua haujlwm thiab qhov ntsuas kub ntawm 30 degrees, ces qhov ntsuas kub ntawm ib lub teeb dawb LED yuav tsis ua haujlwm. tshaj 45 degrees. Lub sijhawm no, lub neej ntawm LED no yuav zoo tagnrho.
Yog tias muaj 100 LED lub teeb dawb ua haujlwm tib lub sijhawm, thiab lub sijhawm nruab nrab ntawm lawv tsuas yog 11.4 hli, ces qhov ntsuas kub ntawm LED lub teeb dawb nyob ib ncig ntawm pawg yuav tsis tshaj 45 degrees, tab sis qhov kub thiab txias ntawm LED teeb lub teeb nyob hauv. qhov nruab nrab ntawm pawg yuav tsis tshaj 45 degrees. Cov LED dawb lub teeb muaj peev xwm ncav cuag qhov kub ntawm 65 degrees. Lub sijhawm no, LED teeb hlaws yog qhov kev sim. Tom qab ntawd, cov teeb ci LED dawb sib sau ua ke nyob rau hauv nruab nrab yuav theoretically muaj lub teeb nrawm dua, thaum lub teeb LED dawb nyob ib ncig ntawm lub teeb teeb yuav muaj lub teeb qeeb qeeb.
Txawm li cas los xij, yog tias cov hlaws teeb LED sib cais los ntawm ntau tshaj 25 hli, cov cua sov uas lawv tawg ntawm ib leeg yuav tsis sib sau ntau heev. Nyob rau lub sijhawm no, qhov kub ntawm txhua lub teeb ci LED teeb yuav tsum tsawg dua 50 degrees, uas yog qhov zoo dua rau kev ua haujlwm ntawm LED.
Yog tias qhov chaw ua haujlwm ntawm LED nyob rau hauv qhov chaw txias, qhov nruab nrab qhov kub ntawm lub xyoo yuav tsuas yog li 15 degrees, lossis tsawg dua, ces lub neej ntawm LED yuav ntev dua.
Los yog, thaum lub LED ua hauj lwm, muaj ib tug me me kiv cua tshuab ib sab ntawm nws los pab nws dissipate lub tshav kub, uas yog heev pab tau rau lub neej ntawm LED.
Txawm li cas los xij, txhua tus yuav tsum paub tias LEDs ntshai tshav kub. Qhov kub thiab txias, qhov luv ntawm LED lifespan, thiab qhov kub thiab txias, qhov ntev ntawm LED lifespan. Qhov zoo tshaj plaws ua haujlwm kub ntawm LEDs yog qhov tseeb ntawm qhov rho tawm 5 thiab xoom degrees. Tab sis qhov no yeej tsis yooj yim sua.
Yog li ntawd, tom qab peb nkag siab txog qhov ua haujlwm zoo tshaj plaws ntawm LED teeb hlaws, peb yuav tsum sim peb qhov zoo tshaj plaws los ntxiv dag zog rau kev ua haujlwm ntawm cov cua sov thiab cov cua kub dissipation thaum tsim teeb thiab teeb. Txawm li cas los xij, qhov ntsuas kub qis dua, LED lub neej ntev dua.
Ntxiv dua thiab, qhov ua haujlwm hluav taws xob tsis zoo ntawm LED teeb hlaws yog tsim.
Raws li cov txiaj ntsig kev sim, qhov txo qis ntawm kev tsav tsheb tam sim no ntawm LED dawb lub teeb, qhov me me ntawm cov cua sov tawm, tau kawg, qhov me dua qhov ci. Raws li kev soj ntsuam, hauv kev tsim ntawm LED hnub ci teeb pom kev zoo Circuit Court, kev tsav tsheb tam sim no ntawm LED feem ntau tsuas yog 5-10mA; rau cov khoom lag luam uas muaj ntau lub teeb hlaws, xws li ntau tshaj 500 lossis ntau dua, kev tsav tsheb tam sim no feem ntau tsuas yog 10-15mA , Thiab cov tsav tsheb tam sim no ntawm cov npe nrov LED daim ntawv thov teeb pom kev zoo tsuas yog 15-18mA , thiab ob peb tus neeg tsim cov tam sim no ntau tshaj 20mA.
Cov txiaj ntsig kev sim kuj tseem qhia tau tias nyob rau hauv kev tsav tsheb tam sim no ntawm 14mA, thiab lub hau npog tsis muaj qhov cua, thiab huab cua kub hauv qhov nce mus txog 71 degrees, cov khoom siv roj tsawg muaj xoom lub teeb tawg rau 1,000 teev thiab 3 feem pua. rau 2, 000 teev. , uas qhia tau hais tias kev siv lub teeb qis qis LED dawb no nyob rau hauv ib puag ncig tau mus txog nws qhov siab tshaj plaws, thiab txawm tias nws loj npaum li cas, nws yog hom kev puas tsuaj rau nws.
Vim tias lub rooj tsav xwm laus siv rau kev laus tsis muaj qhov ua kom sov, cov cua sov tsim tawm thaum LED ua haujlwm tsis tuaj yeem ua rau sab nraud. Qhov no yog ua pov thawj sim. Cov huab cua kub hauv lub rooj tsavxwm laus tau mus txog qhov kub ntawm 101 degrees, thiab qhov kub ntawm lub hau npog ntawm lub rooj tsav tsheb laus tsuas yog 53 degrees, qhov sib txawv ntawm kaum ob degrees. Qhov no qhia tau hais tias lub hau yas tsim los yeej tsis muaj kev ua haujlwm ntawm cov cua sov thiab cov cua kub dissipation. Txawm li cas los xij, hauv kev tsim cov teeb pom kev dav dav thiab cov teeb ci, kev ua haujlwm ntawm kev siv hluav taws xob thiab cov cua sov dissipation yog suav tias yog. Yog li ntawd, txhawm rau ua kom tiav, kev tsim cov khoom siv hluav taws xob ua haujlwm ntawm LED teeb hlaws yuav tsum ua raws li qhov xwm txheej tiag tiag. Yog hais tias lub tshav kub conduction thiab tshav kub dissipation muaj nuj nqi ntawm lub teeb yog zoo, nws tsis muaj teeb meem yog hais tias tus tsav tam sim no ntawm lub LED dawb lub teeb yog nce me ntsis, vim hais tias cov LED teeb hlaws ua hauj lwm. Cov cua sov tuaj yeem raug xa tawm mus rau sab nraud ib ntus, thiab tsis muaj kev puas tsuaj rau LED, uas yog kev saib xyuas zoo dua rau LED. Ntawm qhov tsis sib xws, yog tias qhov hluav taws xob conduction thiab cov hluav taws kub dissipation muaj nuj nqi ntawm lub teeb yog li ntawd, nws yog qhov zoo dua los tsim lub voj voog me me, kom nws tso tawm tsawg dua.
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