Yeej, nws tuaj yeem hais tau tias lub luag haujlwm tseem ceeb ntawm LED tsav lub zog hluav taws xob yog hloov cov khoom siv hluav taws xob AC rau hauv qhov chaw tam sim no uas nws cov zis hluav taws xob tuaj yeem hloov pauv nrog LED Vf (rau pem hauv ntej voltage poob. Qhov zoo ntawm LED tsav fais fab mov yog ncaj qha cuam tshuam rau kev ntseeg siab thiab kev ruaj ntseg ntawm tag nrho cov luminaire. Pib los ntawm LED tsav tsheb thiab lwm yam kev siv thev naus laus zis thiab kev siv cov neeg siv khoom, kab lus no tau txheeb xyuas thiab txheeb xyuas ntau yam tsis ua tiav hauv kev tsim thiab kev siv ntawm lub luminaire. :
▲ Lub Vf variation ntau yam ntawm LED teeb hlaws tsis raug txiav txim siab, ua rau lub teeb tsis zoo thiab ua haujlwm tsis ruaj khov.
Kev thauj khoom kawg ntawm lub teeb LED feem ntau yog tsim los ntawm ntau cov hlua LED nyob rau hauv tib lub sijhawm, thiab nws qhov ua haujlwm voltage Vo=Vf * Ns, qhov twg Ns sawv cev rau cov LEDs txuas nrog hauv series. Lub Vf ntawm LED hloov nrog kub. Feem ntau, ntawm qhov tam sim no tsis tu ncua, Vf ua qis qis ntawm qhov kub thiab txias, thiab Vf ua siab dua ntawm qhov kub qis. Yog li ntawd, LED teeb load ua haujlwm voltage sib raug rau VoL ntawm qhov kub thiab txias, thiab LED teeb load ua haujlwm voltage sib raug rau VoH ntawm qhov kub thiab txias. Thaum xaiv lub LED tsav fais fab mov, nws yog ib qho tsim nyog yuav tau xav txog tias qhov tso zis hluav taws xob ntau ntawm lub zog hluav taws xob yog ntau dua VoL ~ VoH.
Yog tias qhov siab tshaj plaws tso zis hluav taws xob ntawm qhov xaiv LED tsav lub zog qis dua VoH, lub zog siab tshaj plaws ntawm lub teeb yuav tsis ncav cuag lub zog tiag tiag ntawm qhov kub thiab txias. Yog hais tias qhov tsawg kawg nkaus voltage ntawm cov xaiv LED tsav lub zog siab dua VoL, qhov tso zis ntawm lub zog tsav yuav dhau qhov kev ua haujlwm ntawm qhov kub thiab txias. Ntau yam, kev ua haujlwm tsis ruaj khov, teeb yuav flicker, thiab lwm yam.
Txawm li cas los xij, xav txog tag nrho cov nqi thiab kev ua tau zoo, nws tsis tuaj yeem ua qhov muag tsis pom kev ua haujlwm ultra-dav qhov hluav taws xob ntau ntawm LED tsav lub zog hluav taws xob: vim tias lub zog tsav lub zog hluav taws xob tsuas yog nyob rau hauv qee qhov, kev tsav tsheb fais fab yog qhov siab tshaj plaws. . Thaum qhov ntau dhau lawm, qhov ua tau zoo thiab lub zog muaj zog (PF) yuav deteriorate. Nyob rau tib lub sijhawm, kev tsim cov khoom siv hluav taws xob ntau ntawm cov khoom siv hluav taws xob tsav tsheb yog dav dhau, uas yuav ua rau cov nqi siab dua thiab kev ua haujlwm tsis tuaj yeem ua kom zoo dua.
▲ Tsis to taub cov yam ntxwv ua haujlwm ntawm LED
Muaj cov neeg siv khoom uas xav tau lub zog nkag ntawm lub teeb kom yog tus nqi ruaj khov, nrog rau qhov yuam kev ruaj khov ntawm 5%, thiab tsuas yog rau txhua lub teeb los kho cov zis tam sim no kom ncav cuag lub zog teev. Vim qhov kub ntawm qhov chaw ua haujlwm sib txawv thiab lub sijhawm teeb pom kev sib txawv, lub zog ntawm txhua lub teeb tseem yuav sib txawv heev.
Cov neeg siv khoom muab tso rau qhov kev thov no, txawm hais tias nws muaj nws qhov kev lag luam thiab kev lag luam xav txog. Txawm li cas los xij, cov yam ntxwv ntawm volt-ampere ntawm LED txiav txim siab tias LED tsav fais fab mov yog qhov chaw tam sim no, thiab nws cov zis hluav taws xob hloov pauv nrog kev hloov pauv ntawm LED load series voltage Vo. Thaum qhov ua tau zoo ntawm lub zog tsav yog qhov hloov pauv tsis tau, nws lub zog hloov pauv nrog Vo.
Nyob rau tib lub sijhawm, kev ua haujlwm tag nrho ntawm LED tsav lub zog yuav nce ntxiv tom qab thermal sib npaug. Nyob rau hauv tib lub zog tso zis, lub zog input yuav txo qis piv rau lub sijhawm pib.
Yog li ntawd, thaum tsim cov kev cai, daim ntawv thov ntawm LED tsav lub zog yuav tsum xub nkag siab txog cov yam ntxwv ntawm kev ua haujlwm ntawm LED, tsis txhob tso qee qhov ntsuas uas tsis ua raws li lub hauv paus ntsiab lus ntawm cov yam ntxwv ua haujlwm, thiab tsis txhob ntsuas qhov ntsuas qhov deb tshaj qhov yuav tsum tau ua, thiab zam dhau qhov kev xav tau. zoo thiab cov nqi pov tseg.
▲ Ua tsis tiav thaum lub sijhawm xeem
Muaj cov neeg muas zaub uas tau yuav ntau lub npe ntawm LED tsav tsheb fais fab khoom siv, tab sis tag nrho cov qauv ua tsis tau tejyam thaum lub sij hawm xeem. Tom qab kev soj ntsuam ntawm qhov chaw pom tau tias cov neeg siv khoom siv tus kheej-dual-voltage regulator los ncaj qha hluav taws xob LED tsav lub zog rau kev sim. Tom qab siv hluav taws xob, tus tswj hluav taws xob tau maj mam nce ntawm 0Vac mus rau qhov ntsuas kev ua haujlwm ntawm lub zog tsav LED.
Qhov kev sim ua haujlwm no tuaj yeem yooj yim ua rau LED tsav lub zog pib thiab ua haujlwm nrog kev thauj khoom thaum cov khoom siv hluav taws xob tsawg heev, thiab qhov xwm txheej no yuav ua rau cov tswv yim tam sim no ntau dua li tus nqi ntsuas, thiab cov khoom siv hluav taws xob sab hauv. , xws li fuses, rectifier txuas hniav, Thermistor, thiab lwm yam, tsis ua hauj lwm vim tam sim no los yog overheating, ua rau lub hwj chim mov tsis ua hauj lwm.
Yog li ntawd, txoj kev sim kom raug yog los kho qhov ntsuas hluav taws xob mus rau qhov ntsuas kev ua haujlwm ntawm qhov hluav taws xob ntawm LED tsav lub zog, thiab tom qab ntawd txuas lub zog tsav rau kev ntsuas hluav taws xob.
Tau kawg, kev txhim kho kev tsim qauv kuj tseem tuaj yeem zam qhov teeb meem tsis ua haujlwm los ntawm kev ua haujlwm tsis zoo ntawm qhov kev sim: pib voltage txwv Circuit Court thiab input undervoltage tiv thaiv Circuit Court yog teem rau ntawm qhov kawg ntawm lub zog tsav. Thaum cov tswv yim tsis ncav cuag qhov pib qhov hluav taws xob tau teeb tsa los ntawm lub zog tsav, lub zog tsav lub zog tsis ua haujlwm; Thaum lub input voltage poob mus rau lub input undervoltage tiv thaiv point, lub zog tsav nkag mus rau hauv lub xeev tiv thaiv.
Yog li ntawd, txawm tias cov kauj ruam ua haujlwm ntawm tus kheej-dual voltage regulator tseem siv nyob rau hauv cov neeg siv khoom' cov txheej txheem kev xeem, kev tsav tsheb fais fab muaj kev tiv thaiv tus kheej thiab yuav tsis poob. Txawm li cas los xij, ua ntej kev sim, cov neeg siv khoom yuav tsum ua tib zoo nkag siab seb cov khoom siv LED tsav fais fab puas muaj qhov kev tiv thaiv no (xav txog qhov kev thov tiag tiag ntawm LED tsav fais fab mov, feem ntau LED tsav fais fab khoom siv tam sim no tsis muaj qhov kev tiv thaiv no).
▲ Txawv load, sib txawv xeem
Thaum LED tsav fais fab mov raug kuaj nrog LED teeb, qhov tshwm sim yog qhov qub, thiab thaum qhov kev sim ua tiav nrog cov khoom siv hluav taws xob, qhov tshwm sim yuav txawv txav. Feem ntau qhov tshwm sim no muaj cov laj thawj hauv qab no:
(1) Cov zis hluav taws xob tam sim no lossis lub zog ntawm lub zog tsav lub zog tshaj qhov ua haujlwm ntawm cov khoom siv hluav taws xob. (Tshwj xeeb tshaj yog nyob rau hauv CV hom, lub siab tshaj plaws kev xeem lub zog yuav tsum tsis txhob ntau tshaj 70% ntawm lub siab tshaj plaws lub hwj chim ntawm lub load, txwv tsis pub lub load yuav instantaneously overpower tiv thaiv thaum loading, ua rau lub hwj chim mov tsis ua hauj lwm los yog load.)
(2) Cov yam ntxwv ntawm cov khoom siv hluav taws xob siv hluav taws xob tsis haum rau kev ntsuas qhov chaw tam sim no, thiab qhov ntsuas hluav taws xob tau dhia, ua rau lub zog tsav lub zog tsis ua haujlwm lossis thauj khoom ib txwm.
(3) Vim hais tias muaj ib tug loj capacitor nyob rau hauv lub tswv yim ntawm cov khoom siv hluav taws xob load, qhov kev ntsuam xyuas yog sib npaug rau kev sib txuas lub capacitor loj nyob rau hauv parallel nrog cov zis ntawm lub zog tsav, uas yuav ua rau cov qauv tam sim no ntawm lub zog tsav mus rau. ua tsis ruaj tsis khov.
Vim hais tias LED tsav fais fab mov yog tsim los ua kom tau raws li cov yam ntxwv ntawm kev khiav hauj lwm ntawm LED teeb, qhov ze tshaj plaws txoj kev sim rau qhov tseeb thiab tiag daim ntaub ntawv yuav tsum tau siv LED teeb hlaws dai raws li ib tug load, thiab hlua ib ammeter thiab ib tug voltmeter mus kuaj.