Raws li ib feem tseem ceeb ntawmLED txoj kev teeb, qhov zoo ntawm LED tsav tsheb ncaj qha cuam tshuam rau kev ntseeg tau thiab ruaj khov ntawm tag nrho cov teeb. Yog tias tus tsav tsheb LED txoj kev teeb pom kev puas tsuaj, nws yuav ua rau kev ua haujlwm tsis zoo ntawm lub teeb thiab txawm tias tsis ruaj khov.
Yog liDab tsi tuaj yeem ua rau kev puas tsuaj rau LED txoj kev teeb tsav tsheb? Peb kwv yees muaj cov kev txheeb xyuas hauv qab no:
1. Kev laus ntawm cov khoom siv hluav taws xob
Xws li cov resistors, capacitors, diodes, transistors, LEDs, connectors, ICs thiab lwm yam khoom siv xws li qhib Circuit Court, luv Circuit Court, burnout, leakage, functional tsis ua hauj lwm, tsis tsim nyog hluav taws xob tsis, tsis ruaj tsis khov thiab lwm yam teeb meem tsis ua hauj lwm.
2. PCB cov teeb meem zoo
Xws li PCB, PCBA, dej tsis zoo, tawg, delamination, CAF, qhib Circuit Court, luv Circuit Court thiab lwm yam teeb meem tsis ua hauj lwm.
3. Tsis zoo cua sov dissipation ntawm LED fais fab mov
Lub voj voog tsav tsheb yog tsim los ntawm cov khoom siv hluav taws xob, thiab ob peb yam tseem ceeb heev rau qhov kub thiab txias. Xws li cov khoom siv hluav taws xob electrolytic, cov qauv siv dav dav rau kev kwv yees lub neej ntawm electrolytic capacitors yog "txhua 10 degrees qis dua hauv qhov kub, lub neej yuav ob npaug". Cov cua kub tsis zoo yuav ua rau nws lub neej luv luv thiab tsis ua haujlwm ntxov, ua rau LED tsis ua haujlwm thiab teeb tsis ua haujlwm. Tshwj xeeb tshaj yog rau kev tsim- nyob rau hauv lub hwj chim mov (lub hwj chim muab tso rau hauv tag nrho cov teeb), lub hwj chim mov nrog ib tug loj npaum li cas ntawm cov cua sov yuav ua rau kom lub tshav kub conduction thiab kub dissipation siab ntawm tag nrho cov teeb, qhov kub thiab txias LED yuav nce, thiab nws lub teeb efficiency thiab lifespan yuav txo tau heev. Yog li ntawd, thaum tsim cov khoom siv hluav taws xob LED, nws yuav tsum tau them sai sai rau nws tus kheej qhov teeb meem kub dissipation. Yog li ntawd, cov teeb meem saum toj no tuaj yeem daws tau los ntawm kev ua tiav qhov kev ntsuam xyuas thaum pib ntawm kev tsim lub teeb thiab tsim cov khoom siv hluav taws xob ib txhij. Hauv kev tsim, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog cov cua kub dissipation ntawm LED thiab cov khoom siv hluav taws xob, thiab tswj cov cua sov ntawm lub teeb tag nrho, kom lub teeb zoo dua tuaj yeem tsim.
4. Teeb meem hauv kev tsim hluav taws xob
(1) Lub zog tsim. Txawm hais tias LED muaj kev ua haujlwm siab luminous, tseem muaj 80 feem pua -85 feem pua ntawm cov cua sov poob, uas ua rau kub nce ntawm 20-30K hauv lub teeb. Yog hais tias chav tsev kub yog 25 degree, sab hauv ntawm lub teeb yuav yog 45-55 degree. Cov khoom siv hluav taws xob yog nyob rau hauv qhov chaw kub siab rau lub sijhawm ntev. Txhawm rau kom ntseeg tau tias lub neej kev pab cuam, lub zog paj yuav tsum tau nce ntxiv. Feem ntau, cov npoo ntawm 1.5 mus rau 2 zaug yog khaws cia.
(2) Cov khoom xaiv. Thaum qhov kub thiab txias ntawm lub teeb yog 45-55 degree, qhov kub thiab txias ntawm cov khoom siv hluav taws xob yog li 20 degree, thiab qhov kub ntawm cov khoom siv yuav tsum ncav cuag 65-75 degree. Qee cov khoom yuav txav ntawm qhov kub thiab txias thiab tseem ua rau lawv lub neej luv. Yog li ntawd, cov khoom yuav tsum raug xaiv rau kev siv mus sij hawm ntev ntawm qhov kub thiab txias, thiab tshwj xeeb yuav tsum tau them nyiaj rau electrolytic capacitors thiab xov hlau.
(3) Kev tsim hluav taws xob ua haujlwm. Cov khoom siv hluav taws xob hloov hluav taws xob yog tsim los rau LED tsis, feem ntau tsis tu ncua tam sim no. Qhov loj ntawm qhov tam sim no txiav txim siab qhov ci ntawm LED. Yog hais tias batch tam sim no yuam kev loj, lub brightness ntawm tag nrho cov batch ntawm teeb yuav tsis sib xws. Tsis tas li ntawd, kev hloov pauv kub tuaj yeem ua rau lub zog hluav taws xob tso tawm tam sim no hloov pauv. Feem ntau, batch yuam kev yog tswj nyob rau hauv ± 5 feem pua kom ntseeg tau tias qhov ci ntawm lub teeb yog zoo ib yam, thiab lub zog rau pem hauv ntej ntawm LED yog biased. Qhov tsis tu ncua tam sim no voltage ntau ntawm cov khoom siv hluav taws xob tsim yuav tsum suav nrog qhov voltage ntau ntawm LED. Thaum siv ntau lub LEDs nyob rau hauv series, qhov tsawg kawg nkaus voltage poob muab faib los ntawm cov xov tooj ntawm series kev twb kev txuas yog qhov tsawg kawg nkaus voltage, thiab lub siab tshaj plaws voltage poob multiplied los ntawm cov series kev twb kev txuas yog lub Upper limit voltage. Qhov tsis tu ncua tam sim no voltage ntau ntawm cov khoom siv hluav taws xob yog me ntsis dav dua qhov ntau yam no. Feem ntau, cov kev txwv sab saud thiab qis yog teem rau 1 ~ 2V headroom.
(4) PCB layout tsim. Qhov luaj li cas ntawm cov teeb ci LED tshwj xeeb rau cov khoom siv hluav taws xob me me (tshwj tsis yog cov khoom siv hluav taws xob sab nraud), yog li PCB tsim yuav tsum siab dua, thiab muaj ntau yam yuav tsum tau xav txog. Qhov kev nyab xeeb ntawm kev nyab xeeb yuav tsum txaus, thiab cov khoom siv hluav taws xob uas yuav tsum muaj kev tawm tswv yim thiab tso tawm, lub hauv paus Circuit Court thiab theem nrab Circuit Court yuav tsum muaj qhov hluav taws xob tiv thaiv ntawm 1500 ~ 2500 VAC, thiab qhov deb ntawm tsawg kawg yog 3 hli yuav tsum tau tso rau ntawm PCB. Yog tias nws yog lub teeb nrog lub plhaub hlau, qhov teeb tsa ntawm tag nrho cov khoom siv hluav taws xob yuav tsum xav txog qhov kev nyab xeeb ntawm qhov siab - qhov hluav taws xob thiab lub plhaub. Yog tias tsis muaj qhov chaw los xyuas kom muaj kev nyab xeeb nyob deb, lwm yam kev ntsuas yuav tsum tau siv los xyuas kom cov rwb thaiv tsev, xws li xuas nrig ntaus qhov hauv PCB, ntxiv cov ntawv insulating, thiab potting insulating kua nplaum. Tsis tas li ntawd, qhov kev teeb tsa ntawm lub rooj tsavxwm yuav tsum xav txog qhov sib npaug ntawm cov cua sov, thiab cov khoom cua sov yuav tsum tau muab sib npaug sib npaug thiab tsis tuaj yeem muab tso rau hauv qhov tseem ceeb kom tsis txhob muaj qhov kub thiab txias hauv zos. Khaws cov electrolytic capacitor kom deb ntawm qhov chaw tshav kub kom qeeb cov laus thiab ua kom lub neej ntev.
5. xob laim puas
Kev xob laim yog ib qho tshwm sim tshwm sim, tshwj xeeb tshaj yog nyob rau lub caij ntuj nag. Qhov kev puas tsuaj thiab kev poob uas nws coj los yog suav nrog ntau pua lab nyiaj daus las txhua xyoo thoob ntiaj teb. Cov xob laim raug muab faib ua hluav taws xob ncaj qha thiab hluav taws xob tsis ncaj. Indirect xob laim feem ntau suav nrog hluav taws xob hluav taws xob thiab hluav taws xob induced. Txij li thaum lub zog cuam tshuam los ntawm xob laim ncaj qha yog loj heev thiab nws lub zog puas tsuaj yog qhov muaj zog heev, cov khoom siv hluav taws xob dav dav tsis tuaj yeem tiv taus nws, yog li qhov kev sib tham tseem ceeb ntawm no yog hom hluav taws xob tsis ncaj.
Qhov cuam tshuam ntawm qhov hluav taws xob tsim los ntawm xob laim hluav taws xob yog ib yam ntawm cov nthwv dej ib ntus, uas yog cuam tshuam rau kev cuam tshuam, uas tuaj yeem yog qhov hluav taws xob tawg lossis hluav taws xob tam sim no. Raws li cov kab hluav taws xob lossis lwm txoj hauv kev (ua hluav taws xob) lossis los ntawm electromagnetic teb (inductive xob laim) thiab xa mus rau kab hluav taws xob. Nws lub waveform yog tus cwj pwm los ntawm kev nce nrawm ua ntej thiab tom qab ntawd qeeb qeeb. Qhov tshwm sim no yuav ua rau muaj kev phom sij rau lub zog. Qhov cuam tshuam tam sim ntawd nws tsim deb tshaj qhov kev ntxhov siab ntawm hluav taws xob ntawm cov khoom siv hluav taws xob zoo tib yam, thiab qhov tshwm sim ncaj qha yog kev puas tsuaj ntawm cov khoom siv hluav taws xob.
6. Cov kab hluav taws xob hluav taws xob ntau tshaj lub zog thauj khoom
Thaum cov kab hluav taws xob sib txuas ntawm tib lub tshuab hluav taws xob ntev dhau lawm thiab muaj cov khoom siv hluav taws xob loj - teev nyob rau hauv ceg, thaum cov khoom loj - nplai pib thiab nres, daim phiaj hluav taws xob yuav hloov pauv sai, thiab txawm ua rau daim phiaj tsis ruaj khov. Thaum qhov hluav taws xob tam sim no ntawm daim phiaj tshaj 310 VAC, lub tsav yuav puas lawm (txawm tias muaj cov cuab yeej tiv thaiv xob laim, nws tsis siv, vim tias cov cuab yeej tiv thaiv xob laim yog cuam tshuam nrog cov mem tes ntawm kaum tawm microseconds, thiab kab sib chaws hloov pauv. tuaj yeem ncav cuag kaum milliseconds, lossis txawm ntau pua milliseconds). Yog li ntawd, kev saib xyuas tshwj xeeb yuav tsum tau them thaum muaj cov tshuab hluav taws xob loj ntawm txoj kev teeb pom kev zoo ntawm txoj kab hluav taws xob. Nws yog qhov zoo tshaj los saib xyuas qhov hloov pauv ntawm daim phiaj hluav taws xob lossis siv cov kab sib chaws sib cais los muab lub zog.
7. Kev sib koom ua ke tsis ua haujlwm
Lub hwj chim ntim feem ntau suav nrog cov txheej txheem kev sib txuas ntawm PCB pawg thawj coj saib thiab cov khoom siv, uas cov pob qij txha ua lub luag haujlwm tseem ceeb. Lub luag haujlwm tseem ceeb ntawm cov pob qij txha yog kom paub txog kev sib txuas ntawm cov khoom siv hluav taws xob thiab hluav taws xob ntawm cov khoom siv hluav taws xob thiab cov substrate (PCB board hauv LED fais fab mov). Qhov zoo ntawm cov pob qij txha zoo cuam tshuam rau kev ntseeg tau ntawm cov cuab yeej. Ntawm qhov tod tes, kev sib koom tes tsis ua haujlwm yog los ntawm kev ua txhaum ntawm kev tsim khoom thiab kev sib dhos, xws li kev sib txuas, kev sib txuas virtual, voids, thiab Manhattan phenomenon. Ntawm qhov tod tes, thaum lub sijhawm ua haujlwm, thaum qhov kub thiab txias hloov pauv, vim qhov sib txawv ntawm thermal expansion coefficient ntawm cov khoom thiab PCB pawg thawj coj saib, thermal stress yog generated nyob rau hauv cov pob qij txha. Kev hloov pauv nyob rau hauv lub sijhawm yuav ua rau qaug zog puas tsuaj rau cov pob qij txha thiab thaum kawg ua rau qaug zog. Invalidate.
Txij li thaum tsav tsheb fais fab mov muaj xws li kev cuam tshuam loj rauLED txoj kev teeb, yuav daws qhov teeb meem ntawm kev puas tsuaj yooj yim ntawm LED tsav fais fab mov?
Txhawm rau daws cov teeb meem ntawm qhov tsis ua hauj lwm siab thiab kev saib xyuas nyuaj ntawm LED tsav lub zog, los ntawm kev tsom xam ntawm LED teeb pom kev zoo thiab kev xav tau ntawm lub zog, ua ke nrog cov teeb meem ntawm daim ntawv thov tam sim no, peb sim ua kom qis -voltage DC fais fab mov hom nyob rau hauv LED txoj kev teeb pom kev zoo. DC fais fab mov tsis tsuas yog txo qhov tsis ua hauj lwm ntawm LED tsav lub zog, tab sis kuj txo qhov kev pheej hmoo ntawm kev nyab xeeb ntawm txoj kev teeb pom kev zoo, thiab muab kev yooj yim rau kev them nqi tsheb hluav taws xob yav tom ntej.
Nrog kev txhim kho txuas ntxiv ntawm lub teeb -emitting diode (LED) thev naus laus zis, LED teeb pom kev zoo tau maj mam nthuav dav ntawm sab hauv tsev mus rau sab nraum zoov. Yog vim li cas rau kev nce qib qeeb ntawm LED nyob rau hauv lub tshav pob ntawm txoj kev teeb pom kev zoo yog lub zog siab ntawm txoj kev teeb pom kev zoo thiab kev ua haujlwm hnyav. Tom qab ib lub sij hawm ntawm kev taug qab thiab kev sim siab ntawm - lub zog LED txoj kev teeb, qee lub teeb LED tau ua tsis tiav ib qho tom qab. Los ntawm kev tshuaj xyuas ntawm qhov tsis ua haujlwm, peb pom tias LED tsav lub zog hluav taws xob puas suav nrog ntau txog 90 feem pua. Txawm hais tias lub neej kev pab cuam theoretical ntawm LED txoj kev teeb yog ntev li 50, 000 teev (13.7 xyoo), lub neej kev pab cuam ntawm nws tsav Circuit Court yog luv luv, txog 12,000 teev (3 xyoos) . Tsav lub zog tau dhau los ua qhov tsis txaus txwv qhov kev pabcuam lub neej ntawm LED txoj kev teeb. Nyob rau tib lub sijhawm, vim tsis muaj cov qauv zoo sib xws rau cov khoom siv hluav taws xob LED uas haum rau cov khoom siv hluav taws xob LED, lub zog tsav hluav taws xob tsim tawm los ntawm ntau tus neeg muag khoom tsis sib xws, thiab qhov zoo tsis sib xws, uas ua rau tsis yooj yim rau kev saib xyuas ntawm LED. txoj kev teeb pom kev zoo, thiab tus nqi ntawm kev hloov lub zog tsav yog siab.
Qhov teeb meem ntawm cov khoom siv hluav taws xob tau dhau los ua qhov tseem ceeb cuam tshuam rau kev nce qib thiab kev siv cov teeb ci LED. Tsuas yog los ntawm kev daws teeb meem ntawm LED fais fab mov tuaj yeem siv cov teeb ci LED hauv kev teeb pom kev zoo qhib.
1. Cov kev cai ntawm LED hais rau lub hwj chim mov
Yuav kom daws tau qhov teeb meem ntawm LED fais fab mov, peb yuav tsum to taub lub hauv paus ntsiab lus ntawm kev ua hauj lwm ntawm LED hais thiab lawv cov hwj huam mov yuav tsum tau.
Cov teeb ci LED tam sim no siv hauv txoj kev teeb pom kev zoo muaj lub teeb tag nrho {{{0}}} emitting qauv, suav nrog ob ntu: LED teeb qhov chaw thiab lub zog hluav taws xob. Lub teeb ci LED yog qhov sib xyaw ua ke ntawm qee tus lej ntawm siab - lub zog LED hais (thawj hauv series thiab tom qab ntawd nyob rau hauv qhov sib npaug) rau hauv tag nrho lub teeb -emitting nti. Ib qho LED tsuas yog ib qho diode. Thaum ib qho hluav taws xob rau pem hauv ntej yog siv thoob plaws lub diode kom zoo siab rau P-N hlws taws los ua tam sim no, LED tuaj yeem tawm lub teeb. Lub nominal voltage ntawm ib leeg LED yog 3.4V ± 0.2V (qhov tseeb ua haujlwm voltage yog li 2.8 ~ 3.8V). Kev ua haujlwm tam sim no muaj feem xyuam rau lub zog thiab qhov ci, thiab LEDs ntawm lub zog sib txawv muaj qhov sib txawv. Feem ntau hais lus, lub zog siab dua, qhov siab dua tam sim no, lub teeb yuav tawm ntau dua. Lub siab-lub zog 1W LED cov khoom siv hauv kev teeb pom kev zoo muaj qhov tam sim no ntawm 350mA.
Los ntawm kev tsom xam cov teeb pom kev zoo ntawm cov teeb ci LED tiag tiag, peb tuaj yeem pom tseeb tias qee qhov ntawm cov teeb ci LED tau txuas nrog hauv cov koob kom tau txais cov hlua LED nrog lub zog ua haujlwm ntawm 40.8V ± 2.4V, thiab tom qab ntawd cov hlua LED no txuas nrog tib lub sijhawm. kom tau txais ib lub teeb ci LED nrog lub sijhawm ua haujlwm ntawm 3.5A. Kev xam qhov poob, lub teeb lub zog yuav tsum yog 48V / 3.5A.
2. LED tsav lub zog
Txoj kev teeb hluav taws xob uas twb muaj lawm yog 220V alternating tam sim no, thiab peb cov kauj ruam ntawm kev txo qhov voltage, rectification, thiab stabilization tam sim no yuav tsum tau ua kom muaj qhov ruaj khov qis -voltage DC fais fab mov rau LED teeb. Ua ntej, lub zog 220V AC tau nqis mus rau hauv 48V qis-voltage AC fais fab, thiab tom qab ntawd qhov qis-voltage AC fais fab hloov mus rau qis-voltage DC fais fab los ntawm kev txhim kho choj, thiab tom qab ntawd hloov mus rau hauv qhov tam sim no tsis tu ncua los ntawm kev ua haujlwm siab -kev hloov pauv kev tswj hwm kom muab cov tam sim no tsis tu ncua rau cov khoom LED. Tam sim no.
Yuav kom txo tau cov nti tsis ua hauj lwm tus nqi, feem ntau manufacturers xaiv qhov sib xyaw ntawm cov hlua tsawg dua thiab ntau qhov sib npaug. Qhov kev xav tau ntawm cov teeb ci LED uas twb muaj lawm yog feem ntau 48V. Txhua lub teeb LED tuaj yeem muaj qhov sib txawv me ntsis ntawm lub zog hluav taws xob thiab qhov xav tau tam sim no. Hauv kev siv tiag tiag, nws yuav tsum ua raws li tag nrho Xaiv lub zog tsav tsim nyog rau qhov voltage thiab curren
