Anzake ena amafunsa zifukwa wamba ndi njira zochizira nyali za LED zikuthwanima, ndipo anthu ena amafuna kufunsa chifukwa chomwe ma siginecha a LED sayatsa. Chikuchitika ndi chiani? M'malo mwake, pali zolephera zitatu zomwe zimalephera komanso njira zowunikira magetsi.
Zolephera zitatu zodziwika bwino za magetsi azizindikiro za LED ndi mayankho:
Cholakwika chofala ndikulephera kokonzanso. Pitani ku Light City ndikugula imodzi ndikuisintha. Chotsogolera chonsecho sichiwonongeka kawirikawiri.
Awiri. Zifukwa zowunikira ma LED:
1. Mikanda ya nyali ndi mphamvu yoyendetsa galimoto sizikufanana, chimbalangondo chimodzi chokha cha 1W nyale : 280-300 ma panopa ndi : 3.0-3.4V voteji, ngati chipangizochi chilibe mphamvu zokwanira, chidzachititsa kuwala kwa gwero. chodabwitsa, ngati panopa ndi lalikulu kwambiri, mikanda nyali sangathe kupirira lophimba. Zikavuta kwambiri, mawaya agolide kapena amkuwa omwe ali mkati mwa mikanda amatha kuyaka, zomwe zimapangitsa kuti mikandayo isagwire ntchito.
2. Mphamvu yamagetsi yamagetsi ikhoza kuonongeka, bola ngati mutayisintha ndi magetsi ena oyendetsa galimoto, sizingawonekere.
3. Ngati dalaivala ali ndi ntchito yotetezera kutentha, kutentha kwa kutentha kwa nyali ya chizindikiro cha LED sikungathe kukwaniritsa zofunikira, ndipo kutetezedwa kwa kutentha kwa dalaivala kudzawombera pamene iyamba kugwira ntchito. Mwachitsanzo, nyale za 20 w zomwe zimagwiritsidwa ntchito pomanga nyali za 30W sizigwira ntchito yabwino yoziziritsa.
4. Ngati nyali zakunja zilinso ndi zochitika za stroboscopic, zikutanthauza kuti nyalizo zimasefukira. Chotsatira chake, ikapenya, sichiwala. Nyali ndi dalaivala zasweka. Ngati dalaivala agwira ntchito yabwino yoletsa madzi, mkanda wa nyali umasweka ndipo gwero la kuwala likhoza kusinthidwa.
Atatu. Kusintha kwa njira yowunikira ma LED:
1. Pamagetsi ochepera amphamvu a LED owunikira, njira yodziwika bwino yowunikira mphamvu ndi njira yodziyimira yokha ya flyback topology. Green Dot, dalaivala wa 8W wopanda mzere wa LED, amakumana ndi zowunikira zamphamvu za Star solid-state. Pamapangidwe ake, chifukwa kutembenuka kwamphamvu kwa sinusoidal square wave kwa flyback regulator sikumapereka mphamvu nthawi zonse pakukondera koyambirira, dera lodziyendetsa lokhazikika limatha kuyambitsa ndikupangitsa kuwala. Kuti mupewe vutoli, ndikofunikira kupanga kutulutsa koyambira koyambira mu theka lililonse. Choncho, m'pofunika kusankha bwino mphamvu ya capacitance ndi kukana kwa nyali za LED zomwe zimapanga dera.
2. Nthawi zambiri diso la munthu limatha kuona kuthwanima kwa kuwala pafupipafupi 70 Hz, koma pamwamba pake silingathe. Chifukwa chake, pazowunikira zotsogola, ngati chizindikiro cha pulse chili ndi gawo lotsika pafupipafupi ndi ma frequency pansi pa 70 Hz, diso lamunthu limamva kuthwanima. Zachidziwikire, pali zinthu zambiri zomwe zingapangitse kuti magetsi a LED aziwunikira pa pulogalamu inayake.
3. Zosefera za Emi zimafunikira ngakhale pamagalimoto otsogola omwe amapereka kuwongolera kwamphamvu kwamphamvu ndikuthandizira kuzimiririka kwa masiwichi amitundu itatu ya Bi-directional SCR. Kanthawi kochepa komwe kamapangitsidwa ndi sitepe ya triterminal bidirectional SCR switch imasangalatsa kumveka kwachilengedwe kwa ma inductors ndi ma capacitor mu fyuluta ya emi.
Ngati mawonekedwe a resonance apangitsa kuti kulowetsedweko kukhale kotsika kuposa komwe kumagwira pagawo lachitatu la bi-directional SCR switch, chosinthira cha SCR chokhala ndi ma terminal atatu chidzazimitsidwa. Pambuyo pochedwa pang'ono, chinthu chosinthira cha SCR cha atatu-terminal bidirectional SCR nthawi zambiri chimayatsidwanso kuti chisangalatse kumveka komweku. Zochitika zingapo izi zitha kubwerezedwa kangapo mkati mwa theka la mawonekedwe amphamvu a INPUT a semaphore ya LED, zomwe zimapangitsa kuti ma LED awonekere.
Nthawi yotumiza: Mar-11-2022
