Pros thiab Cons ntawm cov ntug dimming thiab trailing ntug dimming

Leading-edge dimming (ua-ntug theem-txiav dimming) thiab trailing-edge dimming (trailing-edge theem-txiav dimming) yog ob theem-tswj-raws li dimming technologies, feem ntau yog siv nyob rau hauv LED teeb pom kev zoo thiab tsoos teeb pom kev zoo.dimmertechnologies:

1. Txoj Cai Ua Haujlwm

Dimming ua ntej:

Voltage chopping tshwm sim thaum pib ntawm txhua ib nrab-yoj ntawm lub voj voog AC (theem 0 °). Los ntawm kev ncua lub sijhawm ua haujlwm ntawm thyristors 'kev coj ua lub sijhawm (piv txwv li, kho lub kaum sab xis), qhov hluav taws xob zoo thoob plaws lub nra yog tswj, yog li kho qhov ci. Piv txwv li, qhov loj dua qhov ncua sij hawm nyob rau hauv lub triggering lub kaum sab xis, lub sij hawm luv luv ntawm conduction, thiab qhov qis dua qhov ci.

Trailing ntug Dimming:

Voltage chopping tshwm sim nyob ze qhov kawg ntawm txhua ib nrab-yoj ntawm lub voj voog AC (theem 180 °). Los ntawm kev xa tawm MOSFETs lossis IGBTs 'kev coj ua lub sijhawm ua ntej, dimming tiav.Piv txwv li, lub sijhawm tig tawm ua ntej, qhov hluav taws xob qis dua, thiabdimmer lub teeb.

2.Core Cheebtsam

Dimming ua ntej:

Nws siv cov thyristors (SCR / Triac) ua cov khoom siv hloov pauv, uas yog cov khoom siv ib nrab tswj tau (tsuas yog tswj tau qhov kev coj ua, tsis ua haujlwm tawm).

Trailing ntug Dimming:

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

3.Kev sib piv

4.Summary of Pros and Cons

Leading-Edge Dimming Pros:

Tus nqi qis, paub tab technology, sib xws nrog cov thyristor dimming systems uas twb muaj lawm (piv txwv li, ib txwm incandescentdimmers).

Leading-Edge Dimming Cons:

Tej zaum yuav ua rau LED flickering, electromagnetic cuam tshuam, thiab tej zaum yuav tsis tag nrho tua nyob rau hauv qis loads.

Trailing-ntug Dimming Pros:

Smooth dimming, tsis flickering, txhawb nqa capacitive loads (xws li, LED tsav tsheb), thiab tuaj yeem tua tag nrho.

Trailing-ntug Dimming Cons:

Tus nqi siab dua, qis dua kev lag luam nkag mus, feem ntau yog siv rau kev siv hluav taws xob qis ib leeg-teeb dimming.

5. Daim Ntawv Thov Scenarios

Dimming ua ntej:

Haum rau ib txwm teeb pom kev zoo retrofit tej yaam num (xws li, hloov incandescent qhov muag teev) thiab high-power coj mus muag teeb pom kev zoo systems (yuav tsum tau raws li yam tsawg kawg nkaus load).

Trailing ntug Dimming:

Tsim nyog rau cov teeb ci LED uas tsis muaj zog (piv txwv li, lub rooj teeb, lub teeb hauv tsev ib leeg) thiab cov xwm txheej uas yuav tsum tau muaj kev dimming zoo (xws li, tsev cia puav pheej, tsev so).

6.Technology Development Trends

Thawj-ntug dimming tseem tseem nyob hauv kev ua lag luam vim nws cov nqi zoo, tab sis trailing-edge dimming yog maj mam nce traction hauv high-precision dimming daim ntaub ntawv.Tab sis ob qho tib si yuav tsum tau xyuam xim rau kev sib tw tsav tsheb, vim tias kev sib xyaw ua ke tuaj yeem ua rau dimming tsis ua hauj lwm lossis kev puas tsuaj.

7. Cov lus xaus

Thawj-ntug dimming thiab trailing-ntug dimming txhua tus muaj lawv qhov zoo thiab qhov tsis zoo thiab tsim nyog rau cov xwm txheej sib txawv. Thawj-ntug dimming yog tus nqi-zoo thiab sib xws, ua rau nws zoo tagnrho rau cov teeb pom kev zoo li qub thiab cov tshuab hluav taws xob siab. Trailing-ntug dimming muaj du, flicker-dawb dimming thiab yog haum rau cov uas tsis muaj zog thiab high-precision dimming xav tau. Raws li thev naus laus zis nce qib, daim ntawv thov ntawm trailing-ntug dimming hauv high-precision dimming teb yuav maj mam nce.