Ubuhle Nobubi bokufiphala konqenqema oluphambili kanye nokufiphala konqenqema olulandelanayo

Ukufiphala konqenqema (i-lead-edge phase-cut dimming) kanye ne-trailing-edge dimming (i-trailing-edge phase-cut dimming) ubuchwepheshe bokufiphalisa okusekelwe esigabeni sokulawula, obusetshenziswa ngokuyinhloko ezinhlelweni zokukhanyisa ze-LED kanye nezinhlelo zokukhanyisa zendabuko.Ngezansi kunokuhlaziya okuqhathanisayo kokubili okubili.dimmerubuchwepheshe:

1.Isimiso Sokusebenza

Ukufiphala okuhamba phambili:

Ukunqunywa kwamandla kagesi kwenzeka ekuqaleni kwegagasi ngalinye elinguhhafu womjikelezo we-AC (isigaba esingu-0°). Ngokubambezela ukuqalisa kwesikhathi sokuqhuba kwe-thyristors (okungukuthi, ukulungisa i-angle yokuqhuba), i-voltage esebenzayo kuwo wonke umthwalo iyalawulwa, ngaleyo ndlela ilungise ukukhanya. Isibonelo, ukulibaziseka kukhudlwana ku-engeli yokucupha, isikhathi sokuqhuba siba mfishane, nokukhanya okuphansi.

I-Trailing-Edge Dimming:

Ukunqunywa kwamandla kagesi kwenzeka ngasekupheleni kwegagasi ngalinye elinguhhafu womjikelezo we-AC (isigaba esingu-180°). Ngokuvala ama-MOSFET noma isikhathi sokuqhuba sama-IGBT ngaphambili, ukufiphala kufinyelelwa.Isibonelo, lapho isikhathi sokuvala singaphambi kwesikhathi, i-voltage esebenzayo iyancipha, kanyenciphisa ukukhanya.

2.Izingxenye Eziyinhloko

Ukufiphala okuhamba phambili:

Isebenzisa i-thyristors (SCR/Triac) njengamadivayisi ashintshayo, okungamadivayisi alawulwa kancane (angalawula kuphela ukuqhuba, hhayi ukucisha).

I-Trailing-Edge Dimming:

Isebenzisa ama-MOSFET noma ama-IGBT njengamadivayisi okushintsha, okungamadivayisi alawulwa ngokugcwele (angalawula ngokuqhubekayo kokubili ukuqhuba nokucisha).

3.Ukuqhathanisa Ukusebenza

4.Isifinyezo sezinto ezinhle nezimbi

Izinzuzo ezihamba phambili ze-Dimming:

Izindleko eziphansi, ubuchwepheshe obuvuthiwe, obuhambisana nesistimu yokufiphalisa i-thyristor ekhona (isb., i-incandescent evamileama-dimmers).

I-Dimming Cons Ehamba phambili:

Ingabangela ukucwayiza kwe-LED, ukuphazamiseka kozibuthe, futhi ingase ingavali ngokugcwele ngaphansi kwemithwalo ephansi.

I-Trailing-Edge Dimming Pros:

Ukufiphala okushelelayo, akukho ukucwayiza, kusekela imithwalo ye-capacitive (isb., izishayeli ze-LED), futhi kungacisha ngokuphelele.

I-Trailing-Edge Dimming Cons:

Izindleko eziphakeme, ukungena kwemakethe okuphansi, okusetshenziselwa kakhulu ukufiphalisa isibani esisodwa samandla aphansi.

5.Izimo Zohlelo Lokusebenza

Ukufiphala okuhamba phambili:

Ifanele amaphrojekthi okubuyisela izibani ezivamile (isb., ukushintsha amalambu e-incandescent) kanye nezinhlelo zokukhanyisa ezisebenza ngamandla amakhulu (kumele kuhlangabezane nezidingo ezincane zomthwalo).

I-Trailing-Edge Dimming:

Ifanele amalambu e-LED anamandla aphansi (isb., amalambu edeski, amalambu asendlini eyodwa) kanye nezimo ezidinga ikhwalithi ephezulu yokufiphala (isb., iminyuziyamu, amahhotela).

6.Amathrendi Okuthuthukisa Ubuchwepheshe

Ukufiphalisa onqenqemeni oluphambili kusalokhu kukhonya emakethe ngenxa yezinzuzo zako zezindleko, kodwa ukufiphala kwe-trailing-edge kukhula kancane kancane ezinhlelweni zokufiphalisa ezinembayo.Kodwa zombili zidinga ukunaka ukuhambisana komshayeli, njengoba ukuzixuba kungase kuholele ekuhlulekeni kokufiphalisa noma ukulimala kwedivayisi.

7.Isiphetho

Ukufiphala kwe-lead-edge kanye ne-trailing-edge dimming ngayinye inobuhle nobubi bayo futhi ifanele izimo zohlelo lokusebenza ezahlukene. Ukufiphala kwe-leading-edge kubiza ukonga futhi kuyahambisana, okuyenza ifaneleke ukubuyisela izibani zendabuko kanye nezinhlelo zamandla aphezulu. I-Trailing-edge dimming inikezela ngokufiphala okushelelayo, okungacwayizi futhi ifanele izidingo zokufiphalisa zamandla aphansi nezinemba kakhulu. Njengoba ubuchwepheshe buthuthuka, ukusetshenziswa kwe-trailing-edge dimming ezinkambini zokufiphalisa ezinembe kakhulu kuzokhula kancane kancane.