Yeej, nws tuaj yeem hais tau tias lub luag haujlwm tseem ceeb ntawm LED tsav lub zog hluav taws xob yog los hloov cov khoom siv hluav taws xob AC rau hauv qhov chaw tam sim no uas nws cov zis hluav taws xob tuaj yeem sib txawv nrog LED Vf (rau pem hauv ntej conduction voltage poob. , qhov zoo ntawm LED tsav fais fab mov 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 teeb tsa thiab tshuaj xyuas ntau yam tsis ua haujlwm hauv kev tsim thiab siv cov luminaires:
▲ Cov kev hloov pauv ntawm LED teeb hlaws Vf tsis suav nrog, 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 lub LEDs nyob rau hauv series thiab parallel, thiab nws ua hauj lwm voltage Vo=Vf*Ns, qhov twg Ns sawv cev rau cov xov tooj ntawm LEDs nyob rau hauv series. Lub Vf ntawm LED fluctuates nrog kub. Feem ntau, ntawm qhov tam sim no tsis tu ncua, Vf ua qis dua ntawm qhov kub thiab txias, thiab Vf nce siab ntawm qhov kub tsawg. 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 LED tsav fais fab mov, nws yuav tsum tau txiav txim siab tias qhov tso zis hluav taws xob ntau ntawm lub zog tsav yog ntau dua VoL ~ VoH.
Yog tias qhov siab tshaj plaws tso zis hluav taws xob ntawm qhov xaiv LED tsav lub zog hluav taws xob 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 tias qhov tsawg kawg nkaus qhov hluav taws xob ntawm LED tsav lub zog hluav taws xob yog siab dua VoL, qhov tso zis ntawm lub zog tsav tsheb tuaj yeem tshaj lub zog ua haujlwm ntawm qhov kub thiab txias. ntau yam, kev ua haujlwm tsis ruaj khov, thiab flickering ntawm cov teeb thiab teeb.
Txawm li cas los xij, xav txog tag nrho cov nqi thiab kev ua tau zoo, peb tsis tuaj yeem ua qhov muag tsis pom qhov tso zis ntau qhov hluav taws xob ntau ntawm LED tsav fais fab mov: vim hais tias lub zog tsav hluav taws xob tsuas yog nyob rau hauv qee yam, lub zog tsav hluav taws xob yog qhov siab tshaj plaws. Tom qab 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
Ib tus neeg siv khoom ib zaug xav tau lub zog nkag ntawm lub teeb kom yog tus nqi ruaj khov, nrog rau qhov yuam kev 5 feem pua, thiab cov zis tam sim no tsuas yog hloov kho rau txhua lub teeb kom ncav cuag lub zog teev. Vim muaj qhov sib txawv ntawm qhov chaw ua haujlwm kub thiab lub sijhawm teeb pom kev sib txawv, lub zog ntawm txhua lub teeb tseem yuav txawv heev.
Cov neeg siv khoom tau muab qhov kev thov no, txawm hais tias muaj kev xav txog nws txoj kev lag luam thiab kev lag luam. 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 LED load series voltage Vo. Nyob rau hauv cov xwm txheej uas tag nrho cov kev ua tau zoo ntawm lub zog tsav yog qhov pib tsis hloov pauv, nws cov tswv yim fais fab hloov 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 cov xwm txheej ntawm tib lub zog tso zis, lub zog tawm tswv yim yuav txo qis piv rau lub sijhawm siv hluav taws xob.
Yog li ntawd, thaum ua kev xav tau rau LED tsav lub zog, cov neeg siv yuav tsum xub nkag siab txog cov yam ntxwv ua haujlwm ntawm LEDs, tsis txhob tso qee qhov ntsuas uas tsis ua raws li lub hauv paus ntsiab lus ntawm kev ua haujlwm, thiab tib lub sijhawm tsis txhob ntsuas qhov ntsuas qhov deb tshaj qhov xav tau tiag tiag, thiab zam dhau qhov zoo thiab cov nqi pov tseg.
▲ Ua tsis tiav thaum kuaj
Muaj cov neeg siv khoom uas tau yuav ntau lub npe ntawm LED tsav tsheb, tab sis tag nrho cov qauv ua tsis tiav thaum lub sijhawm kuaj. Tom qab ntawd, tom qab kev soj ntsuam ntawm qhov chaw, nws tau pom tias cov neeg siv khoom siv lub tshuab hluav taws xob sib txuas txuas ncaj qha rau lub zog hluav taws xob rau LED tsav lub zog rau kev sim. Tom qab fais fab tuag, tus tswj hluav taws xob tau maj mam nce los ntawm 0Vac mus rau qhov ntsuas ua haujlwm voltage ntawm LED tsav fais fab mov.
Xws li kev sim ua haujlwm tau yooj yim ua rau LED tsav lub zog pib thiab ua haujlwm nrog kev thauj khoom ntawm qhov hluav taws xob me me, thiab qhov xwm txheej no yuav ua rau cov tswv yim tam sim no loj dua li tus nqi ntsuas, thiab cov khoom siv sab hauv, xws li fuses, rectifier txuas hniav, thermistor, thiab lwm yam tsis ua hauj lwm vim tam sim no ntau dhau los yog overheating, uas ua rau lub zog tsav tsis ua hauj lwm.
Yog li ntawd, txoj kev sim kom raug yog los kho qhov voltage regulator mus rau qhov ntsuas ua hauj lwm voltage ntau ntawm LED tsav fais fab mov, thiab tom qab ntawd txuas cov tsav tsheb fais fab 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 hom kev sim ua haujlwm tsis zoo: teeb tsa qhov pib voltage txwv Circuit Court thiab input undervoltage tiv thaiv Circuit Court ntawm cov tswv yim kawg ntawm lub zog tsav. Thaum cov tswv yim tsis ncav cuag qhov pib hluav taws xob tau teeb tsa los ntawm kev tsav lub zog, lub zog tsav tsheb tsis ua haujlwm; Thaum lub input voltage poob mus rau qhov input undervoltage tiv thaiv point, lub zog tsav tsheb nkag mus rau hauv lub xeev tiv thaiv.
Yog li ntawd, txawm tias cov kauj ruam ntawm kev ua haujlwm ntawm qhov pib-voltage regulator tseem siv nyob rau hauv cov neeg siv khoom txoj kev sim, lub zog tsav tsheb 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 cov khoom siv hluav taws xob LED, feem ntau cov khoom siv hluav taws xob LED tam sim no tsis muaj qhov kev tiv thaiv no).
▲ Cov khoom sib txawv, cov txiaj ntsig sib txawv
Thaum tus tsav tsheb LED raug kuaj nrog lub teeb LED, qhov tshwm sim yog qhov qub, tab sis thaum nws raug kuaj nrog lub tshuab hluav taws xob, qhov tshwm sim yuav txawv txav. Feem ntau qhov tshwm sim no muaj cov laj thawj hauv qab no:
(1) Qhov 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 ntsuas lub zog yuav tsum tsis txhob ntau tshaj 70 feem pua ntawm lub siab tshaj plaws lub hwj chim ntawm lub load, txwv tsis pub lub load tej zaum yuav ib ntus over-power tiv thaiv thaum loading, ua rau lub hwj chim tsav tsis ua hauj lwm los yog load ib txwm.)
(2) Cov yam ntxwv ntawm lub ntsuas hluav taws xob siv hluav taws xob tsis tsim nyog rau kev ntsuas qhov tam sim no qhov chaw, thiab cov khoom siv hluav taws xob muaj zog dhia, ua rau lub zog tsav tsis ua haujlwm lossis thauj khoom ib txwm.
(3) Vim hais tias yuav 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 ntawm lub capacitor loj nyob rau hauv parallel nrog cov zis ntawm lub zog tsav, uas yuav ua rau cov qauv tam sim no ntawm kev tsav tsheb fais fab mov. kom tsis ruaj khov.
Vim tias LED tsav tsheb fais fab mov yog tsim los ua kom tau raws li cov yam ntxwv ua haujlwm ntawm LED teeb, txoj kev sim ze tshaj plaws rau qhov tseeb thiab daim ntawv thov tiag tiag yuav tsum yog siv lub teeb ci LED hlaws dai raws li lub nra, thiab txuas lub ammeter thiab voltmeter mus kuaj.
▲ Cov xwm txheej hauv qab no uas feem ntau tshwm sim yuav ua rau muaj kev puas tsuaj rau LED tsav fais fab mov:
Lub AC txuas nrog DC tso zis davhlau ya nyob twg ntawm lub zog tsav tsheb, ua rau tsis ua haujlwm ntawm kev tsav tsheb fais fab;
Lub AC txuas nrog lub tswv yim lossis tso tawm ntawm DC / DC tsav fais fab mov, ua rau lub zog tsav tsis ua haujlwm;
Lub qhov hluav taws xob tas li tam sim no thiab lub teeb dimming txuas ua ke, ua rau tsis ua haujlwm ntawm lub zog tsav;
· Cov theem xaim txuas nrog hauv av xaim, ua rau tsis muaj qhov tso tawm ntawm lub zog tsav thiab lub plhaub tau them;