1. Lub zog hluav taws xob tas li yog dab tsi
Nws txhais tau hais tias thaum lub input voltage nyob rau hauv qhov kev teev tseg thiab lub load tam sim no hloov nyob rau hauv lub rated range, cov zis voltage tseem nyob twj ywm.
2. Cov khoom siv hluav taws xob tsis tu ncua yog dab tsi
Hais txog qhov input voltage nyob rau hauv qhov kev teev tseg, cov zis tam sim no yog tas li, tab sis cov zis voltage sib txawv nyob rau hauv ib tug tej yam ntau yam nrog rau qhov loj ntawm lub load.
3. Nyob rau hauv dab tsi tej yam kev mob los xaiv ib tug tas mus li voltage fais fab mov, thiab nyob rau hauv dab tsi tej yam kev mob los xaiv ib tug tas mus li fais fab mov?
A. Cov khoom siv hluav taws xob tsis tu ncua thiab cov khoom siv hluav taws xob tsis tu ncua tuaj yeem siv rau hauv qhov chaw nrog lub teeb tsis tu ncua. Lub ci ci sib xws ntawm kev siv cov khoom siv hluav taws xob tas li yog qhov zoo dua li ntawm qhov hluav taws xob tsis tu ncua.
B. Nws yog qhov tsim nyog rau kev siv lub zog hluav taws xob tas li thaum siv hauv kev hloov maj mam hloov thiab qhov chaw scanning.
4. Dab tsi yog qhov yuav tsum tau ua rau LED teeb thaum siv lub zog hluav taws xob tas li?
Cov zis hluav taws xob ntawm qhov hluav taws xob tas li yuav tsum ua raws li kev ua haujlwm ntawm lub teeb ci LED, piv txwv li: cov khoom siv hluav taws xob tsis tu ncua yog 12V, qhov ua haujlwm voltage ntawm txhua ceg ntawm LED teeb pab pawg yuav tsum. yog 12V, tus naj npawb ntawm cov ceg ntawm LED module Nws tuaj yeem nce lossis txo qis hauv qhov ntau ntawm qhov tso zis ntau tshaj tam sim no. Vim qhov sib txawv ntawm LED conduction voltage poob, qhov hluav taws xob poob ntawm txhua ceg kuj tseem yuav tsis ncaj, uas yuav ua rau tam sim no ntawm txhua ceg sib txawv. Txhua ceg yuav tsum tau txuas nrog nyob rau hauv series nrog voltage divider resistors lossis lwm yam kev txwv tam sim no.
5. Dab tsi yog qhov yuav tsum tau ua rau lub teeb LED thaum siv lub zog hluav taws xob tas li?
Cov zis tam sim no ntawm cov khoom siv hluav taws xob tas li yuav tsum ua raws li qhov sib npaug ntawm cov dej ntws ntawm cov ceg ntoo ntawm LED teeb. Tus naj npawb ntawm LEDs ntawm ceg tuaj yeem nce lossis txo qis hauv qhov tso zis voltage ntau. Piv txwv li, cov zis tam sim no ntawm cov khoom siv hluav taws xob tas li yog 700mA thiab cov zis hluav taws xob yog 2.5V. ~ 12V; Kev khiav hauj lwm tam sim no ntawm txhua ceg ntawm LED teeb yog 350mA, thiab kev khiav hauj lwm voltage ntawm ib lub teeb LED yog 3.2. Ces tus naj npawb ntawm LED ceg yog 2 thiab tus naj npawb ntawm LED teeb ntawm ceg yog nce los yog txo nyob rau hauv qhov ntau ntawm 1 ~ 4.
Nws yog qhov zoo tshaj los tsav ib lub teeb ci LED. Yog tias koj tsav ntau txoj hauv kev, ib qho ntawm lawv yuav qhib, thiab tam sim no yuav ntxiv rau lwm ceg, ua rau lub LED overcurrent thiab hlawv lub LED. Txhawm rau zam qhov teeb meem no, ntxiv qhov sib npaug ntawm qhov sib npaug rau lub teeb ci LED, piv txwv li, yog tias qee qhov LED raug hlawv tawm, cov khoom siv hla dhau yuav cia li luv-circuit ua rau lwm cov LEDs ua haujlwm ib txwm.
6. Dab tsi yog kev ua haujlwm zoo?
Vim lub zog hloov dua siab tshiab thiab cov txheej txheem kis tau tus mob, ntau yam poob inevitably tshwm sim. Yog li ntawd, lub hwj chim tso zis yog ib txwm tsawg dua lub zog input. Piv txwv li, thaum lub hwj chim mov ua hauj lwm, ntau yam Cheebtsam thiab circuits muaj resistances, uas yuav ua kom sov tom qab fais fab tuag. Qhov no ntawm cov cua sov yog lub zog poob, yog li lub zog tso zis yog ib txwm tsawg dua lub zog input. Txhawm rau ntsuas qhov degree ntawm lub zog poob hauv kev hloov pauv thiab kev sib kis, peb txhais qhov piv ntawm cov zis hluav taws xob ntawm cov khoom siv hluav taws xob rau cov khoom siv hluav taws xob raws li qhov ua tau zoo ntawm cov khoom siv hluav taws xob. Kev ua tau zoo yog sawv cev los ntawm tsab ntawv h.
Cov khoom siv hluav taws xob ua haujlwm siab tuaj yeem txuag hluav taws xob. Tsis tas li ntawd, cov khoom siv hluav taws xob muaj txiaj ntsig zoo muaj cov khoom siv hluav taws xob tsawg thiab qhov kub tsis tshua muaj siab, uas tuaj yeem ua rau lawv lub neej ua haujlwm ntev.
7. Dab tsi yog ripple
Ripple hais txog AC tivthaiv uas tsis yog DC tivthaiv ntawm DC tso zis voltage. Feem ntau, qhov zaus ntawm AC feem ntau yog ntau dua 100 Hz, lossis txawm kaum ntawm MHz, thiab cov ripple tsis tuaj yeem raug tshem tawm.
10. Puas yog ripple cuam tshuam rau lub neej ntawm LED?
Lub neej ntev ntawm LED nyob ntawm qhov loj ntawm lub ripple thiab tus naj npawb ntawm txhua ceg. Thaum tus naj npawb ntawm LEDs ntawm ceg tsis hloov, qhov loj dua lub ripple, lub neej ntev ntawm LED; thaum lub ripple tseem zoo li qub, ntau tus naj npawb ntawm LEDs ntawm ceg, qhov cuam tshuam me me ntawm cov ripple ntawm LED, thiab lub neej ntev dua.
11. Puas yog qhov ripple cuam tshuam rau lub neej ntawm LED?
Lub neej ntev ntawm LED nyob ntawm qhov loj ntawm lub ripple thiab tus naj npawb ntawm txhua ceg. Thaum tus naj npawb ntawm LEDs ntawm ceg tsis hloov, qhov loj dua lub ripple, lub neej ntev ntawm LED; thaum lub ripple tseem zoo li qub, ntau tus naj npawb ntawm LEDs ntawm ceg, qhov cuam tshuam me me ntawm cov ripple ntawm LED, thiab lub neej ntev dua.
Piv txwv li: qhov tso zis hluav taws xob ntawm lub zog hluav taws xob yog 12V, lub ncov-rau-peak ripple yog 500Mv, thiab cov naj npawb ntawm LEDs ntawm txhua ceg yog 4
1. Nyob rau hauv cov xwm txheej tsis muaj ripple, qhov voltage ntawm txhua LED yog 12÷4=3V
2. Tom qab lub ripple yog superimposed, qhov voltage uas txhua LED bears yog (12V÷0.5V) ÷4 LEDs=3.12V
12. Qhov ntsuas kub qis yuav cuam tshuam rau lub sijhawm pib ntawm lub zog hluav taws xob thiab nws yuav tsis ua haujlwm li qub. Qhov ntsuas kub qis dua, qhov pom tseeb dua qhov cuam tshuam rau lub zog hluav taws xob. Txawm hais tias cov khoom siv hluav taws xob tuaj yeem hloov mus rau qhov chaw ua haujlwm kub thiab ib puag ncig yog nyob ntawm qhov tsim nyog ntawm kev tsim cov khoom siv hluav taws xob sab hauv ntawm lub zog hluav taws xob thiab qhov tsim nyog parameter sib piv ntawm cov khoom. Lub hwj chim mov muaj ib tug tsim nyog Circuit Court tsim thiab ib tug tsim nyog ua ke ntawm cov khoom tsis, thiab nws muaj peev xwm hloov mus rau qhov kub thiab txias yog zoo dua. ,
13. Lub zog
Cov hauj lwm ua ib lub sij hawm yog hu ua lub zog. Lub zog hluav taws xob feem ntau tuaj yeem muab faib ua peb hom: lub zog pom tseeb, lub zog nquag thiab lub zog reactive.
14. Lub hwj chim pom tseeb yog dab tsi?
Nyob rau hauv AC Circuit Court nrog kev tiv thaiv thiab inductance, cov khoom ntawm qhov zoo ntawm qhov hluav taws xob thiab qhov zoo ntawm qhov tam sim no yog hu ua lub zog pom tseeb, uas yog ntsuas los ntawm ammeter, voltmeter thiab ohmmeter uas feem ntau siv hauv kev xyaum. , VA yog tag nrho cov tsis muaj nyob rau hauv pom meej zog.
Lub zog muaj zog
---- Lub zog hluav taws xob yog siv los ua haujlwm thiab siv tau, thiab lawv hloov mus rau hauv tshav kub, lub teeb, lub zog siv hluav taws xob lossis tshuaj lom neeg, thiab lwm yam, hu ua lub zog ua haujlwm; kuj hu ua nruab nrab hwj chim. Lub zog tam sim no ntawm alternating tam sim no tsis yog tus nqi tas li. Qhov nruab nrab tus nqi ntawm lub hwj chim nyob rau hauv ib lub sij hawm yog hu ua active hwj chim, uas yog hais txog lub hwj chim noj los ntawm lub resistive ib feem ntawm lub Circuit Court, sawv cev los ntawm tsab ntawv P, nyob rau hauv watts.
16. Lub zog reactive yog dab tsi?
Nyob rau hauv ib lub voj voog nrog inductance (los yog capacitance), lub inductance (capacitance) hloov lub zog ntawm cov khoom siv hluav taws xob mus rau hauv qhov chaw sib nqus (lossis hluav taws xob hluav taws xob) hauv ib nrab ntawm lub voj voog, thiab khaws cia cov khoom sib nqus (lossis hluav taws xob) hauv lub voj voog. lwm ib nrab lub voj voog. Hluav taws xob teb) lub zog yog xa rov qab mus rau lub hwj chim. Lawv tsuas yog pauv nrog lub zog hluav taws xob thiab tsis siv lub zog tiag tiag. Peb hu lub amplitude tus nqi ntawm tus nqi ntawm lub hwj chim los pauv lub zog tsis muaj hwj chim, uas yog sawv cev los ntawm Q tsab ntawv thiab chav tsev yog depletion.