Melemo le Melemo ea ho fifala ha pele le ho fifala ha morao

Leading-eddge dimming (lead-eddge phase-cut dimming) le trailing-edge dimming (trailing-eddge phase-cut dimming) ke mekhoa e 'meli ea ho fokotsa karolo e thehiloeng ho taolo, e sebelisoang haholo-holo ho mabone a LED le mekhoa ea mabone a setso.dimmermahlale:

1.Molao-motheo oa ho sebetsa

Leading-Edge Dimming:

Voltage chopping e etsahala qalong ea leqhubu le leng le le leng la halofo ea potoloho ea AC (mohato oa 0 °). Ka ho liehisa ho tsosoa ha nako ea conduction ea thyristors (ke hore, ho lokisa angle ea conduction), motlakase o sebetsang ho pholletsa le mojaro o laoloa, kahoo o fetola khanya. Mohlala, ha tieho ea angle ea ho qala e ea kholoanyane, nako ea conduction e khutsufala, 'me khanya e ea tlase.

Trailing-edge Dimming:

Voltage chopping e etsahala haufi le qetellong ea leqhubu le leng le le leng la halofo ea potoloho ea AC (mohato oa 180 °). Ka ho tima MOSFET kapa nako ea ho tsamaisa li-IGBT pejana, ho fifala hoa fihlelleha. Mohlala, nako ea ho tima pele ho nako, matla a motlakase a fokotseha, 'mefokotsa kganya.

2.Likaroloana tsa mantlha

Leading-Edge Dimming:

E sebelisa li-thyristors (SCR / Triac) e le lisebelisoa tsa ho fetola, e leng lisebelisoa tse laoloang ka halofo (li ka laola feela conduction, eseng ho tima ka mafolofolo).

Trailing-edge Dimming:

E sebelisa li-MOSFET kapa li-IGBT e le lisebelisoa tsa ho chencha, e leng lisebelisoa tse laoloang ka botlalo (li ka laola ka bobeli tsamaiso le ho tima).

3.Papiso ya Tshebetso

4.Kakaretso ea Melemo le Melemo

Melemo e tsoetseng pele ea Dimming:

Theko e tlase, theknoloji e butsoitseng, e tsamaellanang le lits'ebetso tsa dimming tsa thyristor tse teng (mohlala, incandescent ea setso.dimmers).

Dimming Cons tsa maemo a holimo:

E ka baka ho panya ha LED, tšitiso ea motlakase, 'me e kanna ea se ke ea tima ka botlalo tlasa meroalo e tlase.

Melemo ea Trailing-Edge Dimming:

Ho fifala ho boreleli, ha ho paki, ho ts'ehetsa meroalo e matla (mohlala, li-driver tsa LED), 'me e ka tima ka botlalo.

Trailing-edge Dimming Cons:

Theko e phahameng, ho kenella ha 'maraka ho tlase, hangata e sebelisetsoa ho fifatsa lebone le le leng la matla a tlase.

5.Maemo a Kopo

Leading-Edge Dimming:

E loketse merero ea khale ea ho lokisa mabone (mohlala, ho fetola li-bulbs tsa incandescent) le lisebelisoa tsa mabone a khoebo a matla a phahameng (a tlameha ho fihlela litlhoko tse fokolang tsa mojaro).

Trailing-edge Dimming:

E loketse mabone a LED a nang le matla a tlase (mohlala, mabone a deskeng, mabone a ntlo a le mong) le maemo a hlokang boleng bo phahameng ba ho fifala (mohlala, limusiamo, lihotele).

6. Mekhoa ea ntlafatso ea theknoloji

Leading-eddge dimming e ntse e le eona e ka sehloohong 'marakeng ka lebaka la melemo ea eona ea litšenyehelo, empa ho fifala ha trailing-edge butle-butle ho ntse ho tsoela pele ho ts'oaroa ka mokhoa o nepahetseng oa ho fifala ha lisebelisoa.

7.Qetello

Leading-edge dimming le trailing-edge dimming e 'ngoe le e 'ngoe e na le melemo le mathata a eona 'me e loketse maemo a fapaneng a ts'ebeliso. Leading-eddge dimming e na le litšenyehelo tse ngata ebile e lumellana, e etsa hore e be e loketseng bakeng sa lisebelisoa tsa khale tsa mabone le lisebelisoa tsa matla a phahameng. Trailing-edge dimming e fana ka dimming e boreleli, ntle le ho panyapa 'me e loketse litlhoko tsa dimming tse matla a tlase le tse nepahetseng haholo. Ha thekenoloji e ntse e tsoela pele, ts'ebeliso ea "trailing-eddge dimming" masimong a dimming e nepahetseng haholo e tla eketseha butle-butle.