Tsib txoj hauv kev ua kom pom kev nkag siab zoo ntawm LED teeb pom kev zoo!

Lub hauv paus ntsiab lus ntawm lub teeb pom kev zoo ntawm LED txawv ntawm qhov pom kev ib txwm muaj. Nws tso siab rau PN sib txuas kom tso lub teeb ci. Lub teeb pom kev ntawm LED ntawm tib lub zog siv ntau daim sib txawv thiab qhov sib txawv tam sim no thiab qhov ntsuas hluav taws xob, yog li nws cov qauv thaiv sab hauv thiab kev faib hluav taws xob kuj sib txawv, ua rau cov Chaw Tsim Khoom sib txawv' cov teeb pom kev muaj qhov xav tau sib txawv rau kev tsav tsheb dimming. Yog li ntawd, qhov tsis sib xws ntawm cov kev tswj hwm thiab cov khoom siv teeb pom kev zoo tau dhau los ua teeb meem tshwm sim hauv kev lag luam. Tib lub sijhawm, kev sib txawv ntawm LEDs tseem ua rau muaj kev cov nyom ntau dua rau kev tswj hwm. Yog tias lub kaw lus tswj hwm thiab cov khoom siv teeb pom kev zoo tsis sib xws, nws yuav ua rau lub teeb tawm mus lossis flicker, thiab yuav ua rau muaj kev puas tsuaj rau LED tsav Circuit thiab lub teeb ci.

Muaj tsib txoj hauv kev tswj teeb pom kev zoo ntawm lub khw:

1. Ua tus txiav theem txiav (FPC), thyristor dimming

2. Kab rov tav ntu txiav (RPC) MOS raj dimming

3. 1-10V dimming

4. DALI (Digital Addressable Lighting Interface)

5. DMX512 (lossis DMX) dimming

Ua ntug theem txiav tswj dimming

Kev ua rau ntug dimming yog siv lub thyristor Circuit Court, pib los ntawm AC theem 0, qhov hluav taws xob nkag tau txiav, thiab tsis muaj qhov hluav taws xob nkag mus txog thaum lub thyristor tau qhib. Lub hauv paus ntsiab lus yog txhawm rau kho lub kaum ntse ntse ntawm txhua qhov ib nrab-nthwv dej ntawm qhov hloov pauv tam sim no kom hloov pauv sine waveform, yog li hloov tus nqi muaj txiaj ntsig ntawm kev hloov pauv tam sim no, thiaj li ua tiav lub hom phiaj ntawm dimming.

Txiav-ntug dimmers muaj qhov zoo ntawm kev hloov kho qhov tseeb, ua haujlwm tau zoo, qhov loj me, qhov hnyav, thiab kev ua haujlwm yooj yim nyob deb. Lawv yog cov tseem ceeb hauv kev ua lag luam, thiab feem ntau cov tuam ntxhab' cov khoom yog hom dimmer no. Ua thawj-theem theem tswj dimmers feem ntau siv thyristors li hloov khoom siv, yog li lawv tseem hu ua thyristor dimmers.

Qhov zoo ntawm kev siv FPC dimmers ntawm LED teeb pom kev zoo yog: tus nqi qis qis, sib xws nrog cov kab hluav taws xob uas twb muaj lawm, thiab tsis tas yuav rov txuas dua los tswj kev dimming raws cov theem txiav. Qhov tsis zoo yog qhov FPC' qhov kev ua kom pom kev tsis zoo, uas feem ntau ua rau txo qis hauv qhov ntau thiab ua rau qhov tsawg kawg yuav tsum tau thauj khoom kom ntau dua lub zog ntsuas ntawm ib zaug lossis tsawg tus ntawm LED teeb pom kev zoo . Vim tias cov yam ntxwv ntawm SCR ib nrab tswj kev hloov pauv, nws tsuas muaj lub luag haujlwm tig rau qhov tam sim no, tab sis tsis kaw tag nrho tam sim no. Txawm hais tias nws tau hloov kho mus rau qib qis tshaj, tseem muaj qhov tsis muaj zog tam sim no dhau mus, thiab lub teeb pom kev zoo ntawm LED' s micro-current ua rau siv thyristor dimming ntau tus tshwm sim ntawm lub teeb pom kev tsis muaj zog tseem muaj tshwm sim tom qab LED raug tua, uas tau dhau los ua teeb meem hauv kev txhawb nqa ntawm txoj hlua tam sim no-tsis pub LED dimming txoj kev.

Rov qab-ntug theem txiav tswj dimming

Cov theem tom qab ntu txiav kev tswj dimmer yog ua los ntawm cov nyhuv cuam tshuam transistor (FET) lossis insulated rooj vag bipolar transistor (IGBT) cov cuab yeej. Cov ntug qis qis-txiav dimmer feem ntau siv MOSFET ua lub cuab yeej hloov pauv, yog li nws tseem hu ua MOSFET dimmer, feem ntau hu ua&"; MOS tube &". MOSFET yog qhov kev tswj hwm tag nrho, uas tuaj yeem tswj tau kom qhib lossis kaw, yog li tsis muaj qhov tshwm sim uas lub thyristor dimmer tsis tuaj yeem muab tua kiag li. Ib qho ntxiv, MOSFET dimming circuits yog qhov tsim nyog rau lub peev xwm ntsaws dimming dua li SCRs. Txawm li cas los xij, vim tias tus nqi siab thiab qhov teeb meem nyuab nyuab heev, nws tsis yooj yim rau kev ruaj ntseg thiab lwm yam ntxwv, yog li MOS raj dimming txoj kev tsis tau tsim los. SCR dimming Cov cuab yeej siv kho qhov muag tseem nyob feem ntau ntawm kev lag luam dimming system.

Piv nrog rau qhov ua ntej-ntug theem-txiav dimmer, txoj hauv kev-ntug theem-txiav dimmer tau thov rau cov khoom siv teeb pom kev zoo. Txij li tsis muaj qhov yuav tsum tau ua kom tsawg kawg nkaus, nws tuaj yeem ua tiav qhov ua tau zoo dua ntawm cov cuab yeej siv teeb pom kev zoo lossis qhov me me. Txawm li cas los xij, Txij li MOS cov raj tsis tshua muaj siv nyob rau hauv qhov system dimming, lawv feem ntau tsuas yog ua raws li cov pob qhov rooj ib leeg-teeb dimming hloov. Qhov qis-rov qab-txiav theem dimmer tsis haum rau engineering. Ntau lub tuam txhab tsim teeb pom kev zoo siv lub dimmer no los ntsuas lawv tus kheej lub teeb ntsais thiab teeb. Tom qab ntawd thawb nws tus kheej cov khoom lag luam dimming mus rau kev lag luam engineering, ua rau qhov xwm txheej ntawm theem-txiav dimming tsav tom qab hloov kho nrog thyristor dimming system hauv txoj haujlwm. Qhov tsis sib xws ntawm txoj kev ua kom pom kev no ua rau lub qhov muag ploj, uas tuaj yeem ua rau lub zog hluav taws xob puas ntsoog lossis ntsais muag sai.

1-10V dimming

Muaj ob txoj kab hluav taws xob ywj pheej hauv 1-10V cov cuab yeej dimming, ib qho yog qhov hluav taws xob qhov hluav taws xob zoo ib yam, siv los qhib lossis tua lub zog hluav taws xob rau cov khoom siv teeb pom kev zoo, thiab lwm qhov yog qhov hluav taws xob qis, uas muab qhov ntsuas hluav taws xob rau qhia cov cuab yeej teeb pom kev zoo dimming qib, 0-10V dimming controllers feem ntau siv nyob rau hauv dimming tswj ntawm lub teeb fluorescent ua ntej. Tam sim no, vim tias cov khoom siv hluav taws xob tas li tau ntxiv rau cov tsav LED thiab muaj cov kev tswj tshwj xeeb, 0-10V dimmers tseem tuaj yeem txhawb nqa ntau lub teeb pom kev zoo LED. Tab sis daim ntawv thov tsis txaus kuj tseem pom tseeb heev. Lub teeb hluav taws xob tswj hluav taws xob qis yuav tsum tau teeb tsa kab ntxiv, uas ua rau muaj kev xav tau ntau ntxiv rau kev tsim kho.

DALI dimming

Tus txheej txheem DALI tau piav qhia txog DALI network, suav nrog ntau tshaj 64 chav (chaw nyob ywj pheej), 16 pab pawg thiab 16 qhov xwm txheej. Cov teeb pom kev sib txawv ntawm DALI npav tuaj yeem hloov pauv tau yooj yim kom ua tiav qhov kev tswj hwm thiab kev tswj hwm sib txawv. Hauv kev siv ua tau zoo, tus tswj hwm DALI ib txwm tswj tau txog 40 txog 50 lub teeb, uas tuaj yeem faib ua 16 pawg thiab tuaj yeem ua qee qhov kev nqis tes ua. Hauv DALI network, 30-40 cov lus txib tuaj yeem ua tiav ib pliag. Qhov no txhais tau tias tus tswj yuav tsum tau tswj 2 dimming commands ib ob rau txhua pawg teeb pom kev zoo. DALI tsis yog lub network-point-to-point tiag, nws hloov qhov 1 ～ 10V voltage interface los tswj lub ballast. Piv nrog rau ib txwm 1-10V dimming, qhov zoo ntawm DALI yog tias txhua lub node muaj qhov chaw nyob tshwj xeeb, thiab nrog cov lus tawm tswv yim, qhov dim ntawm qhov ntev dua yuav tsis muaj lub teeb pom kev zoo li 1-10V, tab sis qhov kev ncua deb no tseem yuav tsum tsis txhob tshaj 200 meters.

Pom tseeb DALI tsis haum rau LED teeb pom kev zoo tswj. Lub DALI network tuaj yeem tswj tau 21 lub teeb puv xim LED. DALI tau tsom mus rau kev tswj hwm teeb pom kev zoo ib txwm muaj, tsom mus rau kev tswj zoo li qub thiab kev ntseeg tau, ruaj khov thiab sib xws ntawm lub system. Qhov ntsuas ntawm LED teeb pom kev zoo yog qhov loj dua li ntawm DALI system. Nws feem ntau ua raws cov txuj ci zoo nkauj ntawm cov teeb thiab teeb, thiab tsim nyog siv rau hauv tus lej kev txawj ntse ntawm lub kaw lus. Qhov no xav kom lub kaw lus txuas nrog lub npav loj dua, nrog kev nthuav dav tsis muaj peev xwm thiab cov xwm txheej siab dua. Muaj peev xwm kho tshiab. Yog li ntawd, DALI cov tshuab feem ntau suav nrog hauv lwm cov kab ke hauv npav raws li cov txheej txheem hauv cov phiaj xwm teeb pom kev loj.

Qhov zoo ntawm DALI dimming yuav tsum tsis txhob rov ua dua, tab sis qhov tsis zoo tseem yog teeb meem teeb liab kab teeb tsa thiab tus nqi siab. Nws tsim nyog hais tias tam sim no DALI tus neeg tsav tsheb dimming tseem xav tau lub zog siv hluav taws xob thaum kaw lub teeb kom ntseeg tau tias lub microcontroller ib txwm nyob tos.

0DMX512 dimming

DMX512 tus txheej txheem yog thawj zaug tsim los ntawm USITT (American Theatre Technology Association) los tswj lub dimmer los ntawm tus qauv digital interface siv hauv lub console. DMX512 dhau qhov kev sib piv, tab sis nws tsis tuaj yeem hloov pauv qhov sib piv. Qhov yooj yim, kev ntseeg tau (yog tias nws tuaj yeem teeb tsa thiab siv kom raug) thiab kev hloov pauv ntawm DMX512 ua rau nws yog txheej txheem xaiv thaum cov nyiaj tso cai.

Hauv kev siv ua tau zoo, txoj kev tswj hwm ntawm DMX512 feem ntau yog los tsim lub zog siv hluav taws xob thiab tus tswj hwm ua ke. DMX512 tus tswj hwm 8-24 kab thiab ncaj qha tsav RBG kab ntawm LED teeb. Txawm li cas los xij, hauv txoj haujlwm teeb pom kev zoo hauv tsev, vim tias kab DC tsis muaj zog, nws yuav tsum tau teeb tsa tus tswj hwm ntawm kwv yees li 12 metres, thiab cov npav tswj hwm yog nyob hauv hom sib luag. Yog li ntawd, tus tswj hwm muaj ntau txoj hlua, thiab hauv ntau qhov nws tuaj yeem' tsis tau tsim. Tus txais DMX512 xav tau teeb tsa qhov chaw nyob kom nws tuaj yeem tau txais qhov kev hais kom ua dim, uas yog qhov tsis yooj yim heev hauv cov ntawv thov. Ntau tus tswj hwm tau sib cuam tshuam los tswj cov teeb pom kev zoo, thiab kev tsim qauv ntawm kev ua haujlwm software yuav nyuaj dua. Yog li ntawd, DMX512 yog qhov tsim nyog rau lub sijhawm uas cov teeb thiab teeb pom kev zoo tau koom ua ke, xws li teeb pom kev zoo theem.

Hauv cov ntsiab lus, qhov tsis zoo ntawm DMX tus tswj hwm yog tias nws xav tau kev teeb tsa tshwj xeeb teeb tsa thiab hom, thiab qee qhov kev zov me nyuam yuav tsum tau teeb tsa cov xim yooj yim thiab cov xwm txheej, uas yog kim dua rau kev saib xyuas tom qab.