Leading-edge dimming (lead-edge phase-cut dimming) uye trailing-edge dimming (trailing-edge phase-cut dimming) ndiwo maviri-phase-control-based dimming technologies, anonyanya kushandiswa mumagetsi e LED uye maitiro emagetsi echinyakare.dimmermatekinoroji:
1.Kushanda Nheyo
Leading-edge Dimming:
Kucheka kwemagetsi kunoitika pakutanga kwehafu-wave ye AC kutenderera (chikamu 0 °). Nekunonoka kukonzeresa kweiyo thyristors' conduction nguva (kureva, kugadzirisa iyo conduction angle), iyo inoshanda voltage pamutoro inodzorwa, nekudaro kugadzirisa kupenya. Semuyenzaniso, kunonoka kukuru kwekona yekukonzeresa, kupfupika kwekuita nguva, uye kuderera kupenya.
Trailing-edge Dimming:
Kucheka kwemagetsi kunoitika pedyo nekumagumo kwehafu-wave ye AC cycle (chikamu 180 °). Nekudzima maMOSFET kana IGBT's conduction nguva yakare, kudzikira kunowanikwa.Semuyenzaniso, nguva yekudzima kwekutanga, kuderera kwemagetsi anoshanda, uyekuderedza chiedza.
2.Core Zvikamu
Leading-edge Dimming:
Inoshandisa thyristors (SCR/Triac) semashandisi ekuchinja, ayo ari madiki-anodzorwa midziyo (inogona chete kudzora conduction, kwete kushingaira kudzima).
Trailing-edge Dimming:
Inoshandisa MOSFETs kana IGBTs sezvishandiso zvekuchinja, izvo zvinodzorwa zvizere-zvishandiso (zvinogona kushingaira kudzora zvose conduction uye kudzima).
3.Performance Kuenzanisa
| Feature | Leading-edge Dimming | Trailing-kumucheto Dimming |
| Dimming Range | Yakapamhamha (asi inogona kusadzima zvizere pakupenya kwakaderera) | Yakamanikana, asi yakatsiga |
| Kugarisana | Inoda kufananidzwa ne thyristor dimming masisitimu uye ine hushoma mutoro zvinodiwa | Hapana zvishoma zvinorema zvinodikanwa, zvakakodzera kune yakaderera-simba zvishandiso |
| Flicker & Noise | Inotarisana nekukanganiswa kwemagetsi uye yakaderera-frequency flickering | Noise yakaderera, inotsvedzerera dimming |
| Kudzima Kugona | Inogona kusiya isina kusimba yasara ikozvino (LED inopenya nyaya) | Inogona kudzima zvizere, hapana yakasara ikozvino |
| Mutengo & Kuoma | Mutengo wakaderera, dunhu riri nyore, rinoenderana neyakajairwa wiring | Mutengo wepamusoro, dunhu rakaoma |
4.Summary of Pros and Cons
Inotungamira-kumucheto Dimming Pros:
Mutengo wakaderera, tekinoroji yakakura, inoenderana neiripo thyristor dimming masisitimu (semuenzaniso, yechinyakare incandescentdimmers).
Inotungamira-kumucheto Dimming Cons:
Inogona kukonzera kupenya kwe LED, kukanganiswa kwemagetsi, uye inogona kusadzima zvizere pasi pemitoro yakaderera.
Trailing-edge Dimming Pros:
Smooth dimming, hapana kupenya, inotsigira capacitive mitoro (semuenzaniso, madhiraivha eLED), uye inogona kudzima zvizere.
Trailing-edge Dimming Cons:
Mutengo wepamusoro, wepasi pemusika wekupinda, unonyanya kushandiswa kune yakaderera-simba rimwe-rambi dimming.
5.Application Scenarios
Leading-edge Dimming:
Inokodzera zvechinyakare mapurojekiti ekudzoreredza mwenje (semuenzaniso, kutsiva incandescent bulbs) uye yakakwirira-simba rekutengesa magetsi masisitimu (anofanirwa kuzadzisa zvidiki zvinodikanwa).
Trailing-edge Dimming:
Inokodzera marambi e-low-power e LED (semuenzaniso, marambi edhesiki, marambi eimba imwe chete) uye zviitiko zvinoda kudzika kwemhando yepamusoro (semuenzaniso, mamuseum, mahotera).
6.Technology Development Trends
Leading-edge dimming inoramba iine simba mumusika nekuda kwekukosha kwayo kwemutengo, asi trailing-edge dimming iri kuwedzera zvishoma nezvishoma mune yakakwirira-chaiyo dimming application.Asi ese ari maviri anofanirwa kutarisisa kuenderana kwemutyairi, sezvo kuvasanganisa kungakonzera kutadza kudzima kana kukanganisa mudziyo.
7. Mhedziso
Leading-edge dimming uye trailing-edge dimming imwe neimwe ine zvayakanakira nezvayakaipira uye yakakodzera kune akasiyana mashandisirwo mamiriro. Leading-edge dimming inodhura-inoshanda uye inoenderana, zvichiita kuti ive yakakodzera kune yechinyakare mwenje retrofits uye yakakwirira-simba masisitimu. Trailing-edge dimming inopa yakatsetseka, inopenya-isina dimming uye inokodzera yakaderera-simba uye yakakwirira-chaiyo dimming zvinodiwa. Sezvo tekinoroji ichifambira mberi, kushandiswa kweiyo trailing-edge dimming munzvimbo dzakakwirira-chaiyo dimming kuchawedzera zvishoma nezvishoma.
Nguva yekutumira: Mar-26-2025
