Qhia Tswv Tswv Tswv Tswv Tswv Tswv?

LED lub teeb lwj txhais tau hais tias tom qab ib lub sijhawm ntawm lub teeb, nws lub teeb muaj zog yuav qis dua li lub teeb qub, thiab qhov qis dua yog LED lub teeb lwj. , Txhua leej txhua tus kuj paub tias ib txoj hauv kev tseem ceeb los txo cov teeb pom kev zoo yog txhawm rau txhim kho nws cov cua sov dissipation. Txawm li cas los xij, cov txiaj ntsig ntawm ntau yam teeb pom kev zoo tau raug sim tsis ntev los no los ntawm Lub Chaw Tswj Xyuas Ib puag ncig Lub Teeb, thiab lub teeb tawg ntawm cov teeb pom kev feem ntau tsis tuaj yeem ua tau raws li qhov xav tau ntawm kev siv. Lub teeb lwj tom qab 1200 teev ntawm lub teeb yog 8%, qhov phem tshaj plaws yog 26%, thiab qhov nruab nrab yog 14%. Raws li peb cov txiaj ntsig kev xeem, thaum lub pob qhov kub yog 105 degrees, 14% lub teeb lwj yuav tsum tau ua haujlwm 6000 teev. Nws tuaj yeem pom tias qhov kub ntawm cov teeb pom kev zoo feem ntau yog siab dua 105 degrees lossis ntau dua. Ib feem ntawm lub tuam txhab yuav tsum tsis pom zoo nrog cov txiaj ntsig zoo li no, vim tias lawv xav tias lawv cov radiator tau ua tib zoo tsim. Qhov xwm txheej tiag tiag yuav zoo ib yam, tab sis cov txiaj ntsig kev xeem tsis tuaj yeem ua xyem xyav. Qhov teeb meem yog dab tsi? Tus editor ntseeg hais tias lub radiator tej zaum yuav tsis yog tsim los phem heev, tab sis tej zaum yuav. Tab sis vim li cas lub hwj chim ntawm qhov hluav taws xob tsis tu ncua ua rau lub teeb tawg? Qhov no suab zoo li me ntsis saum ntuj ceeb tsheej. Tab sis qhov tseeb, muaj tseeb tiag. Cia peb pib los ntawm qhov pib! 1. Peb txhua tus paub tias LED's Viaticity yog diode, thiab cov yam ntxwv tseem ceeb tshaj plaws ntawm lub diode yog nws qhov xwm txheej Vodiat. 2. Txawm hais tias tus yam ntxwv kub ntawm LED Voldown yam ntxwv tsis zoo ib yam li qhov nruab nrab diode, qhov sib txawv loj tshaj plaws yog nws cov yam ntxwv kub. Qhov tseeb, tag nrho cov diodes muaj qhov teeb meem ntawm cov yam ntxwv ntawm qhov kub thiab txias, tab sis LED xav tau kev saib xyuas tshwj xeeb rau kev saib xyuas tshwj xeeb. Qhov no yog vim hais tias: Kev ua haujlwm tam sim no ntawm high-power LED kuj loj, 1W yog 0.35A, 3-5W yog 0.7A, 20W yog 1.05A, 30W yog 1.75A, 50W yog 3.5A yog 3.5A. Txawm li cas los xij, qee tus neeg yuav xav tias qhov zoo tam sim no ntawm rectifier diode kuj tseem tuaj yeem ncav cuag tus nqi loj. Vim hais tias tam sim no lub teeb emitting efficiency tseem tsawg, feem ntau ntawm cov input hluav taws xob fais fab hloov mus rau hauv tshav kub, yog li nws cov cua sov yog heev. Yog tias lub tshuab hluav taws xob tsis ua haujlwm zoo, qhov kub ntawm qhov kub yuav nce siab heev. LED yog txawv ntawm lub rectifier diode. Nws tsis yog ua los ntawm cov khoom siv silicon dav, tab sis nws yog ua los ntawm cov ntaub ntawv tshwj xeeb (xws li nitride). Yog li ntawd, cov yam ntxwv kub ntawm nws cov yam ntxwv ambush txawv ntawm qhov nruab nrab diode, tab sis yuav tsum tau loj dua qhov nruab nrab diode. Piv txwv li, qhov kub ntawm cov yam ntxwv ntawm lub ambush yam ntxwv ntawm qhov nruab nrab diode yog -2mv / C. 3. Qhov teeb meem tshwm sim los ntawm qhov nce ntawm qhov kub thiab txias tom qab LED pob caus kub nce, thawj coj los ntawm lub teeb tso zis yog txo. Qhov siab ntawm qhov yooj yim tshwm sim los ntawm qhov nce ntawm qhov kub ntawm lub pob caus yog qhov tsis zoo vim tias qhov kub thiab txias coefficient ntawm cov yam ntxwv voltano yog qhov tsis zoo, uas txhais tau hais tias qhov kub thiab txias tau nce siab thiab cov yam ntxwv tau tawm mus. Piv txwv li, xav tias qhov kub thiab txias nce 50 degrees, ces tus yam ntxwv Fa'an yuav txav mus rau 200mv rau sab laug. Kev siv cov khoom siv hluav taws xob tas li ntawm lub zog hluav taws xob yuav ua rau muaj qhov zoo tam sim no ntawm LED nrog qhov nce ntawm qhov kub thiab txias. Vim tias lub zog hluav taws xob tsis tu ncua, thiab Fa'an cov yam ntxwv tau hloov mus rau sab laug, qhov tshwm sim yog qhov zoo tam sim no nce. Nws tuaj yeem pom los ntawm Fuan cov yam ntxwv ntawm daim duab 2 tias yog tias qhov hluav taws xob tsis tu ncua yog siv los ntawm 3.3V ntawm chav tsev kub, qhov tam sim no rau pem hauv ntej yog 350mA; tom qab lub pob caus kub nce los ntawm 50 degrees, cov yam ntxwv voltano tshuav 0.2V, uas yog sib npaug rau lub hwj chim mov, uas yog sib npaug rau lub hwj chim mov, uas yog sib npaug rau lub hwj chim mov. Tsis tas li ntawd xwb. Lub sijhawm no, qhov zoo tam sim no yuav nce mus rau 600mA. 4. Tom qab siv lub voj voog vicious ntawm qhov kub thiab txias kom nce lub voj voog vicious ntawm qhov hluav taws xob tas li, vim tias lub zog hluav taws xob tsis tau hloov pauv, lub zog nkag ntawm LED nce mus rau 3.3VX0.6A = 1.98W, uas muaj muab ob npaug rau ob npaug. Tom qab qhov kub ntawm qhov kub nce, lub teeb tso zis yuav txo qis, uas txhais tau hais tias ntau lub zog tawm tswv yim hloov mus rau lub zog thermal, uas yog, yog tias qhov tam sim no nce ntxiv rau lub sijhawm no, nws lub teeb tso zis tsis nce thaum nws nce, tab sis nws yuav txo qis. . Yog li ntawd, qhov nce ntawm qhov zoo tam sim no tsuas yog ua rau qhov kub thiab txias, thiab nws yuav tsis nce lub teeb pom kev zoo. Yog li ntawd, tom qab nce lub pob caus kub, qhov zoo tam sim no nce, lub pob caus kub nce, thiab rau pem hauv ntej tam sim no nce, uas ua rau lub vicious voj voog ntawm qhov kub ntawm lub pob caus ntawd. Cov ntsiab lus: Kev siv cov khoom siv hluav taws xob tsis tu ncua ntawm lub zog hluav taws xob yuav ua rau cov pob txha kub, ua kom lub teeb tawg, thiab ua kom lub neej luv. Yog li ntawd, los ntawm kev txheeb xyuas yav dhau los, peb tuaj yeem kos cov lus xaus: Kev siv cov khoom siv hluav taws xob tas li ntawm lub zog hluav taws xob yuav ua rau lub pob kub hnyiab, thiab qhov tshwm sim ntawm qhov kub ntawm lub pob caus yog nce los ntawm lub teeb lwj thiab lub neej luv luv. Piv txwv tias LED yog qhib ntawm 25 degrees ntawm chav tsev kub, qhov kub thiab txias yuav nce tom qab khau raj. Xav tias lub tshuab hluav taws xob tau tsim kom nce mus rau 75 degrees, uas yog, qhov kub thiab txias nce 50 degrees, ces qhov zoo tam sim no yuav nce mus rau 600mA txog 600mA txog 600mA. Tag nrho lub zog tau nce los ntawm 1.155W rau 1.98W, nce ntawm 0.825W 0.825W. Thiab lub hwj chim nce nyob rau hauv qhov no yog yuav luag tag nrho cov hloov dua siab tshiab rau cua sov. Piv txwv tias thawj LED lub luminous efficiency yog 30%, uas yog, 70% input zog (0.8W) yog hloov dua siab tshiab rau thermal zog rau lub thermal zog zog. Tam sim no muaj ob lub thermal zog uas yuav tsum tau dispersed los ntawm lub radiator. Obviously, qhov no tsis yog xam los ntawm tus thawj radiator tsim. Qhov no tau nce lub pob kub ntawm LED los ntawm 50 degrees rau 125 degrees. Cia peb rov qab mus rau daim duab 1 kom pom qhov kho qhov muag decay nkhaus. Lub neej ntawm 125 degrees ntawm lub teeb yog yuav luag 1200 teev. Tom qab ntawd koj tuaj yeem piav qhia yog vim li cas lub tshuab hluav taws xob tsim kom zoo. Nws tseem muaj ntau lub teeb lwj thiab lub neej luv luv! Yog li ntawd, cov khoom siv hluav taws xob rau LED yuav tsum tau siv los ntawm lub zog hluav taws xob tas li. Tom qab qhov tam sim no tsis tu ncua, txawm li cas los xij, qhov kub thiab txias hloov pauv, cov yam ntxwv ntawm kev sib tsoo tau txav mus rau sab laug, thiab tam sim no tsis hloov! Lub pob caus kub yuav tsis vicious!