Iwo mashanu makuru dimming nzira dzemwenje dze LED

1. 1-10V dimming: Pane maviri akazvimirira maseketi mu 1-10V dimming mudziyo. Imwe ndeye yakajairika voltage wedunhu, inoshandiswa kubatidza kana kudzima simba kumidziyo yekuvhenekesa, uye imwe yacho yakaderera-voltage dunhu, iyo inopa referensi Voltage, inotaurira mwenje wemagetsi dimming level. 0-10V dimming controller yaiwanzo shandiswa kudzima kudzora kwemwenje wefluorescent. Ikozvino, nekuti inogara iine magetsi inowedzerwa kune iyo LED mutyairi module uye kune yakatsaurirwa yekudzora wedunhu, saka 0 -10V dimmer inogona zvakare kutsigira huwandu hukuru hwemwenje we LED. Nekudaro, izvo zvikanganiso zvekushandisa zviri pachena zvakare. Low-voltage control signals inoda imwe seti yemitsara, iyo inowedzera zvakanyanya zvinodiwa zvekuvaka.

2. DMX512 dimming: Iyo DMX512 protocol yakatanga kugadzirwa ne USITT (United States Institute of Theatre Technology) kuita yakajairwa dhijitari interface kubva kuconsole kudzora dimmer. DMX512 inodarika analog masisitimu, asi haigone kutsiva zvachose analog masisitimu. DMX512 iri nyore, kuvimbika (kana yakaiswa uye yakashandiswa nemazvo), uye kuchinjika kunoita kuti ive iyo protocol yesarudzo kana mari ichibvumira. Mumashandisirwo anoshanda, iyo nzira yekudzora yeDMX512 inowanzo gadzira iyo magetsi uye controller pamwechete. Iyo DMX512 controller inodzora 8 kusvika 24 mitsetse uye inotyaira yakananga mitsara yeRBG yemarambi eLED. Nekudaro, mukuvaka mapurojekiti ekuvhenekesa, nekuda kwekupera simba kwemitsara yeDC, zvinodikanwa kuisa controller paanenge 12 metres, uye bhazi rekudzora riri mune parallel mode. , saka, mutongi ane wiring yakawanda, uye muzviitiko zvakawanda hazvigoneki kuvaka.

3. Triac dimming: Triac dimming yakashandiswa mumarambi e-incandescent uye marambi ekuchengetedza simba kwenguva yakareba. Iyo zvakare ndiyo inonyanya kushandiswa dimming nzira ye LED dimming. SCR dimming imhando yekudzima kwemuviri. Kutanga kubva pa AC chikamu 0, iyo yekupinda voltage inocheka kuita mafungu matsva. Iko hakuna kupinza kwemagetsi kusvika SCR yabatidzwa. Nheyo yekushanda ndeyekugadzira tangential inobuda voltage waveform mushure mekucheka iyo yekuisa voltage waveform kuburikidza neiyo conduction angle. Kushandisa iyo tangential musimboti kunogona kuderedza kukosha kunoshanda kweiyo inobuda voltage, nekudaro kuderedza simba remitoro yakajairika (resistive mitoro). Triac dimmers ine zvakanakira kurongeka kwepamusoro, kunyatsoshanda, diki saizi, huremu huremu, uye nyore kudzora kure, uye kutonga musika.

4. PWM dimming: Pulse width modulation (PWM-Pulse Width Modulation) tekinoroji inoziva kutonga kweanalog maseketi kuburikidza ne-off control ye inverter circuit switch. Iyo inobuda waveform ye pulse wide modulation tekinoroji ndeye nhevedzano yemapulses ehukuru hwakaenzana ayo anoshandiswa kutsiva yaunoda waveform.

Kutora sine wave semuenzaniso, ndiko kuti, kugadzira iyo yakaenzana voltage yeiyi nhevedzano yemapulses sine wave, uye kuita inobuda pulses iite yakatsetseka sezvinobvira uye ine yakaderera-yakarongeka harmonics. Zvinoenderana nezvinodiwa zvakasiyana, hupamhi hwepuru yega yega inogona kugadziridzwa zvinoenderana nekuchinja inobuda voltage kana inobuda frequency, nekudaro ichidzora analog wedunhu. Zvichitaurwa zviri nyore, PWM inzira yedhijitari encoding analog chiratidzo mazinga.

Kuburikidza nekushandiswa kwepamusoro-resolution counters, chiyero chekugara chesquare wave chinogadziriswa kuti chikodere nhanho yechiratidzo cheanalogi. Iyo PWM siginecha ichiri dhijitari nekuti chero nguva, yakazara-chiyero DC simba rinenge riripo zvizere kana kusavapo zvachose. Voltage kana sosi yazvino inoiswa kune yakatemerwa mutoro mukudzokorora kutevedzana kwepamhepo kana kudzima pulses. Kana simba racho riripo, ndipo apo magetsi eDC anowedzerwa kumutoro, uye kana akadzimwa, ndipo apo magetsi anobviswa.

Kana kuwanda kwechiedza nerima kuchipfuura 100Hz, zvinoonekwa neziso remunhu kupenya kweavhareji, kwete kupenya kwe LED. PWM inogadzirisa kupenya nekugadzirisa chikamu chenguva yakajeka uye yakasviba. Mukutenderera kwePWM, nekuti kupenya kunoonekwa neziso remunhu kune mwenje unopenya kupfuura 100Hz inzira yekuunganidza, kureva kuti, nguva inopenya inoverengera chikamu chikuru chekutenderera kwese. Kukura kwayakaita, ndiko kuwedzera kwainonzwika kuziso remunhu.

5. DALI dimming: Chiyero cheDALI chakatsanangura network yeDALI, kusanganisira huwandu hwezvikamu makumi matanhatu nemana (zvinogona kutaurirwa zvakazvimirira), mapoka gumi nematanhatu uye 16 zviratidziro. Mayuniti akasiyana ekuvhenekesa pabhazi reDALI anogona kuiswa mumapoka kuti awane akasiyana kudzora nzvimbo uye manejimendi. Mumashandisirwo anoshanda, akajairika DALI controller anodzora anosvika makumi mana kusvika makumi mashanu marambi, ayo anogona kukamurwa kuita 16 mapoka, uye anogona kugadzirisa zvimwe zviito zvakafanana. Mune network yeDALI, 30 kusvika 40 mirairo yekudzora inogona kugadziriswa pasekondi. Izvi zvinoreva kuti mutongi anofanirwa kubata 2 dimming mirairo pasekondi kune yega yega mwenje boka.