Cov txiaj ntsig thiab qhov tsis zoo ntawm kev dimming ntug ua ntej thiab kev dimming ntug tom qab

Kev ua kom tsaus ntuj nti (kev ua kom tsaus ntuj nti theem) thiab kev ua kom tsaus ntuj nti (kev ua kom tsaus ntuj nti theem) yog ob txoj kev tswj theem raws li kev ua kom tsaus ntuj nti, feem ntau siv rau hauv teeb pom kev zoo LED thiab cov teeb pom kev zoo ib txwm muaj. Hauv qab no yog kev sib piv ntawm ob qholub teeb ci ntsa iabcov thev naus laus zis:

1. Txoj Cai Ua Haujlwm

Kev Ua Kom Dimming Zoo Tshaj Plaws:

Kev txiav hluav taws xob tshwm sim thaum pib ntawm txhua ib nrab nthwv dej ntawm lub voj voog AC (theem 0 °). Los ntawm kev ncua sijhawm ua kom lub sijhawm conduction ntawm thyristors (piv txwv li, kho lub kaum sab xis conduction), lub zog hluav taws xob zoo thoob plaws lub nra hnyav raug tswj, yog li kho qhov kaj. Piv txwv li, qhov qeeb dua hauv lub kaum sab xis triggering, lub sijhawm conduction luv dua, thiab qhov kaj qis dua.

Kev ua kom tsaus ntuj ntawm ntug kev:

Qhov kev txiav hluav taws xob tshwm sim ze rau qhov kawg ntawm txhua ib nrab nthwv dej ntawm lub voj voog AC (theem 180 °). Los ntawm kev tua MOSFETs lossis IGBTs lub sijhawm conduction ua ntej, kev tsaus ntuj tau ua tiav. Piv txwv li, lub sijhawm tua sai dua, qhov qis dua qhov hluav taws xob zoo, thiabua kom lub teeb tsaus dua.

2. Cov Cheebtsam Tseem Ceeb

Kev Ua Kom Dimming Zoo Tshaj Plaws:

Nws siv thyristors (SCR / Triac) ua cov khoom siv hloov pauv, uas yog cov khoom siv tswj hwm ib nrab (tsuas yog tuaj yeem tswj kev sib txuas lus, tsis tuaj yeem tua).

Kev ua kom tsaus ntuj ntawm ntug kev:

Nws siv MOSFETs lossis IGBTs ua cov khoom siv hloov pauv, uas yog cov khoom siv tswj hwm tag nrho (tuaj yeem tswj tau ob qho tib si conduction thiab tig-off).

3. Kev Sib Piv Kev Ua Tau Zoo

4. Kev Txheeb Xyuas Txog Qhov Zoo thiab Qhov Tsis Zoo

Cov txiaj ntsig zoo tshaj plaws ntawm kev ua kom lub teeb ci ntsa iab:

Tus nqi qis, thev naus laus zis laus, sib xws nrog cov kab ke thyristor dimming uas twb muaj lawm (piv txwv li, cov roj teeb incandescent ib txwm muaj)cov dimmers).

Cov Kev Tsis Zoo ntawm Dimming:

Tej zaum yuav ua rau LED ntsais muag, cuam tshuam hluav taws xob, thiab tej zaum yuav tsis tua tag nrho thaum muaj kev thauj khoom tsawg.

Cov txiaj ntsig ntawm Trailing-edge dimming:

Kev tsaus ntuj du, tsis muaj kev ntsais muag, txhawb nqa cov khoom siv capacitive (piv txwv li, cov tsav tsheb LED), thiab tuaj yeem tua tag nrho.

Qhov tsis zoo ntawm kev siv dimming ntawm ntug kev:

Tus nqi siab dua, kev nkag mus rau hauv kev lag luam qis dua, feem ntau yog siv rau kev tsaus ntuj ib lub teeb uas tsis muaj zog.

5. Cov Xwm Txheej Thov

Kev Ua Kom Dimming Zoo Tshaj Plaws:

Haum rau cov haujlwm kho dua tshiab ntawm lub teeb pom kev zoo ib txwm muaj (piv txwv li, hloov cov teeb incandescent) thiab cov tshuab teeb pom kev zoo muaj zog (yuav tsum ua tau raws li qhov yuav tsum tau ua tsawg kawg nkaus).

Kev ua kom tsaus ntuj ntawm ntug kev:

Haum rau cov teeb LED uas tsis muaj zog (piv txwv li, teeb rooj, teeb hauv tsev) thiab cov xwm txheej uas xav tau qhov tsaus ntuj zoo (piv txwv li, tsev khaws puav pheej, tsev so).

6. Cov Qauv Kev Txhim Kho Technology

Kev ua kom tsaus ntuj zoo tshaj plaws tseem yog qhov tseem ceeb hauv kev ua lag luam vim nws cov nqi zoo, tab sis kev ua kom tsaus ntuj tom qab maj mam nce siab hauv cov ntawv thov ua kom tsaus ntuj zoo. Tab sis ob qho tib si yuav tsum tau them sai sai rau kev sib raug zoo ntawm tus tsav tsheb, vim tias kev sib xyaw ua ke yuav ua rau kev ua tsis tiav ntawm kev tsaus ntuj lossis kev puas tsuaj ntawm lub cuab yeej.

7. Xaus Lus

Kev tswj qhov ci ntsa iab ua ntej thiab kev tswj qhov ci ntsa iab tom qab txhua tus muaj lawv qhov zoo thiab qhov tsis zoo thiab tsim nyog rau ntau yam kev siv. Kev tswj qhov ci ntsa iab ua ntej yog qhov pheej yig thiab sib xws, ua rau nws zoo tagnrho rau kev kho dua tshiab teeb pom kev zoo ib txwm muaj thiab cov tshuab muaj zog siab. Kev tswj qhov ci ntsa iab tom qab muab kev tswj qhov ci ntsa iab du, tsis muaj kev cuam tshuam thiab tsim nyog rau kev xav tau kev tswj qhov ci ntsa iab uas siv zog tsawg thiab raug siab. Thaum thev naus laus zis nce qib, kev siv kev tswj qhov ci ntsa iab tom qab hauv cov teb tswj qhov ci ntsa iab siab yuav maj mam nce ntxiv.