Chifukwa Chiyani Ma LED Akugwedezeka Ndi Momwe Mungayimitsire?
Ma LED akuthwanima pamene kuwala kwawo kusinthasintha. Kusinthasintha uku kumachitika chifukwa ma diode anu otulutsa kuwala amapangidwa kuti aziyatsa ndikuzimitsa mwachangu kwambiri.
Pali zifukwa ziwiri zazikulu zomwe strobo yowonera imatha kumveka:
1. The linanena bungwe ripple pafupipafupi ndi otsika. Pansi pamikhalidwe yapadera (mwachitsanzo, kulowa mwadzidzidzi pamalo owala kuchokera kudera lopanda kuwala), mudzamvanso strobe mozungulira 100Hz. Kale filimu chimango mlingo ndi 24fps, koma ngati pafupipafupi kuunikira ndi Kung'anima pafupipafupi ndi kuzungulira 60Hz, ndipo aliyense sangathe kupirira izo. Oyang'anira makompyuta ndi ma TV amachotsa dongosolo lakale la chimango ndipo ndi losavuta kumvetsa.
2. Linanena bungwe ripple voteji kapena panopa 100Hz linanena bungwe ripple, pamene ripple voteji ndi zosakwana 5%, si kumva stroboscopic. Panthawiyi, kuphulika kwamakono kungakhale kochepa kwambiri kuposa 5%, ndipo kukhazikitsa kumakhala kovuta. Kuthamanga kwa foni yam'manja kapena kamera nthawi zambiri kumakhala pafupifupi 30, ndipo kamera yothamanga kwambiri imatha kufika 400fps. Kuwombera ndi kuwala kwa strobe, ngati mafupipafupi a strobe sangathe kupitirira nthawi 4 mlingo wa chimango chokhazikitsidwa ndi chipangizo chowombera, mudzawona kuwala kukung'anima kapena kugwedezeka pa chipangizo chowombera, ndipo zotsatira za kuwombera ndizofanana. Chifukwa chake, mukamawombera chiwonetsero cha chowunikira chakale cha CRT, nthawi zambiri mumawona bala ikukwera mmwamba. M'munsi pafupipafupi stroboscopic, ngakhale sitingathe kumverera nthawi yomweyo, koma mu kuwala kwa nthawi yaitali, anthu ali otopa kwambiri, mosavuta myopia ndi matenda ena a maso.
Pakadali pano, magetsi a LED amatha kungokwaniritsa zofunikira zopanda stroboscopic:
1. Wonjezerani mphamvu ya electrolytic capacitor
2. Kutengera chigwa chodzaza chigwa cha PFC
3. Kutengera dongosolo la magawo awiri (AC/DC, DC/DC)
Chiwembu choyamba "kumawonjezera linanena bungwe electrolytic capacitor", chiwembu ichi akhoza theoretically ntchito electrolytic capacitor kuyamwa mbali ya AC ripple, koma zinachitikira lenileni limatiuza kuti pamene ripple ulamuliro ndi mkati osiyanasiyana (10%), Ndi zovuta kuti mupitirize kuchepetsa, pokhapokha ngati electrolytic capacitor ikuwonjezeredwa ku mtengo popanda mtengo uliwonse.
Njira yachiwiri ndikugwiritsa ntchito chigwa chodzaza chigwa cha PFC, chomwe ndi chithandizo chodziwika bwino kwambiri. Njira zodzipatula zitha kugwiritsa ntchito pachimake kapena IWATT (yankho loyambirira, lomwe lathetsedwa kwambiri). Ma capacitor awiri akulu ndi ma diode atatu amagwiritsidwa ntchito pakuwongolera mphamvu. Chifukwa pali electrolytic capacitor yayikulu kumbuyo kwa mlatho wokonzanso, AC ripple imatengedwa, ndipo yapano kudzera mu inductor kapena transformer kupita ku sekondale ndi DC.
Njira yachitatu ndiyo kutengera ndondomeko ya magawo awiri. Powonjezera DC / DC kumagetsi omwe alipo a kampani yathu, chikoka cha AC ripple chingathe kuthetsedwa. Magawo amagetsi amathanso kukwaniritsa miyezo ya certification. Komabe, njira iyi ili ndi kuwonjezeka kwina kwa mtengo. Pamafunika chipangizo chowongolera mphamvu ndi mabwalo ena ozungulira, ndipo mtengo wake wonse udzakwera.