Kev sib raug zoo ntawm qhov zoo ntawm LED teeb thiab cov khoom siv hluav taws xob
LED muaj ntau yam zoo xws li kev tiv thaiv ib puag ncig, lub neej ntev, kev ua haujlwm siab photoelectric (tam sim no lub teeb ua haujlwm tau mus txog 130LM / W ~ 140LM / W), av qeeg, thiab lwm yam. Nyob rau hauv xyoo tas los no, nws daim ntawv thov tau tsim sai heev hauv ntau yam lag luam. Nyob rau hauv txoj kev xav, lub neej kev pab cuam ntawm LED yog 100,000 teev, tab sis nyob rau hauv tiag tiag daim ntawv thov txheej txheem, ib co LED teeb pom kev zoo designers muaj kev nkag siab tsis txaus los yog xaiv tsis tsim nyog ntawm LED tsav lub hwj chim los yog blindly nrhiav tus nqi qis. Yog li ntawd, lub neej ntawm LED teeb pom kev zoo khoom yog luv luv heev. Lub neej ntawm cov teeb ci LED tsis zoo yog tsawg dua 2000 teev thiab txawm tias qis dua. Qhov tshwm sim yog qhov zoo ntawm LED teeb tsis tuaj yeem pom hauv daim ntawv thov.
Vim qhov tshwj xeeb ntawm LED ua thiab kev tsim khoom, cov yam ntxwv tam sim no thiab qhov hluav taws xob ntawm LEDs tsim los ntawm cov tuam txhab sib txawv thiab txawm tias tib lub chaw tsim khoom hauv tib pawg ntawm cov khoom muaj qhov sib txawv loj. Noj cov lus qhia tshwj xeeb ntawm high-power 1W dawb LED ua piv txwv, raws li cov cai tam sim no thiab voltage hloov pauv ntawm LED, cov lus piav qhia luv luv tau muab. Feem ntau, rau pem hauv ntej voltage ntawm 1W dawb lub teeb daim ntawv thov yog hais txog 3.0-3.6V, uas yog, thaum nws tau sau npe raws li 1W LED. Thaum tam sim no ntws los ntawm 350 mA, qhov hluav taws xob thoob plaws nws yuav yog 3.1V, lossis nws yuav yog lwm yam nqi ntawm 3.2V lossis 3.5V. Txhawm rau ua kom lub neej ntawm 1WLED, cov chaw tsim khoom siv LED pom zoo kom lub Hoobkas teeb siv 350mA tam sim no. Thaum lub zog tam sim no los ntawm LED nce mus txog 350 mA, qhov me me nce hauv qhov hluav taws xob rau pem hauv ntej hla lub LED yuav ua rau LED rau pem hauv ntej tam sim no nce siab, ua rau LED kub nce linearly, yog li ua kom lub teeb tawg sai sai. Yuav kom txo lub neej ntawm LED thiab txawm hlawv tawm lub LED thaum nws loj heev. Vim qhov tshwj xeeb ntawm qhov hluav taws xob thiab kev hloov pauv tam sim no ntawm LED, cov kev cai nruj yuav tsum tau ua rau lub zog hluav taws xob rau kev tsav lub LED.
LED tsav tsheb yog tus yuam sij rau LED luminaires. Nws zoo li tus neeg lub siab. Txhawm rau tsim cov luminaires zoo LED rau lub teeb pom kev zoo, nws yog ib qho tsim nyog yuav tsum tso tseg qhov hluav taws xob tas li los tsav LEDs.
Ntau lub zog loj LED ntim cov nroj tsuag tam sim no kaw ntau tus neeg LEDs nyob rau hauv tib lub sijhawm thiab hauv cov koob los tsim ib qho 20W, 30W lossis 50W lossis 100W lossis siab dua lub zog LED. Txawm hais tias ua ntej lub pob, lawv raug xaiv nruj me ntsis thiab sib luag, muaj ntau ntau thiab ntau pua tus neeg LEDs vim muaj qhov me me. Yog li ntawd, cov khoom ntim high-power LED tseem muaj qhov sib txawv ntawm qhov voltage thiab tam sim no. Piv nrog rau ib qho LED (feem ntau yog ib lub teeb dawb, lub teeb ntsuab, lub teeb xiav ua haujlwm voltage ntawm 2.7-4V, ib lub teeb liab, lub teeb daj, txiv kab ntxwv lub teeb ua haujlwm voltage ntawm 1.7-2.5V) tsis muaj qhov sib txawv!
Tam sim no, LED teeb khoom (xws li guardrails, teeb khob, projection teeb, vaj teeb, thiab lwm yam) uas tsim los ntawm ntau manufacturers siv kuj, capacitance thiab voltage txo, thiab ces ntxiv ib tug Zener diode muab lub hwj chim rau lub LEDs. Muaj qhov tsis xws luag. Ua ntej, nws tsis muaj txiaj ntsig. Nws siv ntau lub zog ntawm cov kauj ruam-down resistor. Nws kuj tseem tuaj yeem tshaj lub zog siv los ntawm LED, thiab nws tsis tuaj yeem muab lub zog tsav tam sim no. Thaum qhov tam sim no loj dua, lub zog siv ntawm cov kauj ruam-down resistor yuav loj dua, LED tam sim no tsis tuaj yeem lav tau tshaj nws cov kev ua haujlwm ib txwm muaj. Thaum tsim cov khoom lag luam, qhov hluav taws xob hla ntawm LED yog siv los tsav lub zog hluav taws xob, uas yog tus nqi ntawm LED teeb ci. Lub LED yog tsav los ntawm kev tiv thaiv thiab capacitance step-down hom, thiab qhov ci ntawm LED tsis tuaj yeem ruaj khov. Thaum lub hwj chim mov voltage tsawg, qhov ci ntawm LED yuav tsaus, thiab thaum lub hwj chim mov voltage siab, qhov ci ntawm LED yuav ci dua. Tau kawg, qhov txiaj ntsig loj tshaj plaws ntawm kev tiv thaiv thiab kev ua haujlwm ntawm kev tsav tsheb LEDs yog tus nqi qis. Yog li ntawd, qee lub tuam txhab teeb pom kev zoo LED tseem siv txoj kev no.
Qee cov tuam ntxhab, txhawm rau txo tus nqi ntawm cov khoom, siv qhov hluav taws xob tas li los tsav lub LED, kuj coj cov lus nug txog qhov tsis sib xws ntawm txhua qhov LED hauv kev tsim khoom loj, LED tsis tuaj yeem ua haujlwm hauv lub xeev zoo tshaj plaws, thiab lwm yam. .
Kev tsav tsheb tsis tu ncua tam sim no yog qhov zoo tshaj plaws LED tsav txoj kev. Nws yog tsav los ntawm qhov chaw tam sim no. Nws tsis tas yuav txuas tam sim no limiting resistors nyob rau hauv cov zis Circuit Court. Qhov tam sim no ntws los ntawm LED tsis cuam tshuam los ntawm kev hloov pauv hluav taws xob sab nraud, qhov kub thiab txias hloov pauv, thiab qhov tsis sib xws ntawm LED. Cov nyhuv yog ua kom qhov tam sim no tsis tu ncua thiab muab kev ua si tag nrho rau ntau yam zoo heev ntawm LED.