Nigute LED flicker ishobora gukosorwa?

Kuberako dukeneye kumenya ibice bya sisitemu yo kumurika bigomba kunozwa cyangwa gusimburwa, twashimangiye uburyo ari ngombwa kumenya inkomoko ya flicker (ni AC power cyangwa PWM?).

NibaURUGENDO RWA LEDni yo nyirabayazana ya flicker, uzakenera kuyisimbuza iyindi nshyashya ikozwe kugirango yorohereze ingufu za AC hanyuma ihindurwe mumashanyarazi ya DC ihamye rwose, hanyuma ikoreshwa mugutwara LED. Shakisha “flicker kubuntu”Impamyabumenyi n'ibipimo bya flicker muguhitamo umurongo wa LED byumwihariko:

Itandukaniro rigereranijwe hagati yumucyo ntarengwa kandi ntarengwa (amplitude) imbere yumuzingi ugaragazwa nkamanota yijanisha ryitwa "flicker ijana." Mubisanzwe, itara ryaka cyane rihindagurika hagati ya 10% na 20%. (kubera ko filament yayo igumana ubushyuhe bwayo mugihe cy "ibibaya" mukimenyetso cya AC).

Indangantego ya Flicker ni igipimo kigereranya ingano nigihe cyigihe LED itanga urumuri rwinshi kuruta uko byari bisanzwe mugihe cyizunguruka. Indangantego ya flicker yerekana itara ryaka ni 0.04.

Igipimo cyizunguruka gisubiramo isegonda kizwi nka flicker frequency kandi kigaragarira muri hertz (Hz). Bitewe numurongo wibimenyetso bya AC byinjira, amatara menshi ya LED azakora kuri 100-120 Hz. Urwego rusa na flicker na flicker urwego rwagira ingaruka nkeya kumatara hamwe numurongo mwinshi kubera ibihe byabo byihuse.

Kuri 100-120 Hz, ubwinshi bwamatara ya LED burahinduka. IEEE 1789 irasaba 8% umutekano (“risque nke”) guhindagurika kuriyi nshuro, na 3% kurandura burundu ingaruka za flicker.

Uzakenera kandi gusimbuza PWM dimmer igice niba PWM dimmer cyangwa umugenzuzi aribyo bitera flicker. Amakuru meza nuko kuva imirongo ya LED cyangwa ibindi bice bidashoboka kuba isoko ya flicker, gusa PWM dimmer cyangwa umugenzuzi bizakenera gusimburwa.

Mugihe ushakisha igisubizo cya PWM kitagira flicker, menya neza ko hari urutonde rwumurongo ugaragara kuko aricyo kintu cyonyine cyingirakamaro cya PWM cyerekana (kuko mubisanzwe buri gihe ari ikimenyetso gifite flicker 100%). Turasaba inama ya PWM ya 25 kHz (25.000 Hz) cyangwa irenga kubisubizo bya PWM mubyukuri bidafite flicker.

Mubyukuri, ibipimo nka IEEE 1789 byerekana ko inkomoko yumucyo wa PWM hamwe numurongo wa 3000 Hz numuyoboro mwinshi uhagije kugirango ugabanye byimazeyo ingaruka za flicker. Nyamara, inyungu imwe yo kuzamura inshuro hejuru ya 20 kHz ni uko ikuraho ubushobozi bwibikoresho bitanga amashanyarazi kugirango habeho urusaku rwinshi cyangwa urusaku. Impamvu yabyo nuko inshuro ntarengwa yumvikana kubantu benshi ni 20.000 Hz, mugihe rero ugaragaje ikintu kuri 25.000 Hz, kurugero, urashobora kwirinda amahirwe yo gutesha umutwe urusaku cyangwa gutontoma, bishobora kuba ikibazo mugihe ubyumva cyane cyangwa niba porogaramu yawe yumvikana cyane.