Me pēhea te whakatika i te kanapa o te rama LED?

Nā te mea me mōhio tātou ko ēhea ngā wāhanga o te pūnaha rama me whakapai ake, me whakakapi rānei, i whakanuia e mātou te hiranga o te tautuhi i te pūtake o te kanapa (he hiko AC, he PWM rānei?).

Ki te meaRĪHI LEDte pūtake o te kanapa, me whakawhiti e koe ki tētahi mea hou hei whakangawari i te mana AC me te huri hei iahiko DC pumau, ka whakamahia hei taraiwa i ngā LED. Rapua "kore e kimo"ngā tiwhikete me ngā inenga o te kanapa i te wā e whiriwhiri ana i tētahi rīpene LED:

Ko te rerekētanga ōrite i waenga i ngā taumata kanapa mōrahi me te iti rawa (te whānuitanga) i roto i te huringa kanapa ka whakaatuhia hei kaute ōrau e kiia nei ko te "ōrau kanapa". I te nuinga o te wā, ka kanapa te pūahi rama incandescent i waenga i te 10% me te 20%. (nā te mea ka mau tonu te wera o tōna miro i ngā "awaawa" i roto i te tohu AC).

Ko te Taupū Kanapa he inenga e ine ana i te nui me te roa o te wā e whakaputa ana te LED i te mārama nui atu i te mea noa i roto i te huringa kanapa. Ko te taupū kanapa o te pūrama rama mura ko te 0.04.

Ko te tere o te huringa kanapa e pūmau ana i ia hekona e mōhiotia ana ko te auau kanapa, ā, e whakaaturia ana i roto i te hertz (Hz). Nā te auau o te tohu AC e tae mai ana, ka mahi te nuinga o ngā rama LED i te 100-120 Hz. Ko ngā taumata kanapa me te taupū kanapa rite tonu ka iti ake te pānga ki ngā pūangi he auau teitei ake nā te mea he tere ake te wā whakawhiti.

I te 100–120 Hz, ka kimo te nuinga o ngā pūangi LED. E taunaki ana te IEEE 1789 kia 8% te haumaru ("iti te mōrearea") o te kimo i tēnei auau, me te 3% hei whakakore katoa i ngā pānga o te kimo.

Me whakakapi anō hoki te waeine whakaitiiti PWM mēnā ko te whakaitiiti PWM, ko te kaiwhakahaere rānei te take o te kimo. Ko te rongo pai, nā te mea kāore pea ngā rīpene LED, ngā wāhanga rānei, i te pūtake o te kimo, ko te whakaitiiti PWM, ko te kaiwhakahaere rānei anake me whakakapi.

Ina rapu koe i tētahi otinga PWM kore-kikī, kia tino mōhio kei reira he whakatauranga auau mārama nā te mea koinei anake te inenga kikī PWM whai hua (nā te mea he tohu tonu me te 100% kikī). Ka tūtohu mātou i tētahi auau PWM o te 25 kHz (25,000 Hz) neke atu rānei mō tētahi otinga PWM kāore rawa he kikī.

Ina hoki, e whakaatu ana ngā paerewa pēnei i te IEEE 1789 he nui te auau o ngā pūtake mārama PWM me te auau o te 3000 Hz hei whakaiti i ngā pānga o te kanapa. Heoi, ko tētahi painga o te whakapiki i te auau ki runga ake i te 20 kHz ko te whakakore i te kaha o ngā taputapu hiko ki te hanga i ngā oro haruru, tangi rānei e kitea ana. Ko te take o tēnei ko te auau mōrahi e rangona ana mō te nuinga o te tangata ko te 20,000 Hz, nō reira mā te tohu i tētahi mea i te 25,000 Hz, hei tauira, ka taea e koe te karo i te tūponotanga o ngā oro haruru, tangi rānei e whakarihariha ana, ka raru pea mēnā he tino tairongo koe, mēnā rānei he tino tairongo tō tono ki te oro.