Izindlela ezinhlanu eziyinhloko zokufiphalisa izibani ze-LED

1. 1-10V dimming: Kunamasekhethi amabili azimele kudivayisi yokufiphalisa engu-1-10V. Enye isekethe ye-voltage evamile, esetshenziselwa ukuvula noma ukuvala amandla emishini yokukhanyisa, kanti enye iyisekhethi ene-voltage ephansi, ehlinzeka nge-Voltage eyireferensi, etshela izinga lokufiphala kwemishini yokukhanyisa. Isilawuli sokufiphalisa esingu-0-10V sasivamise ukusetshenziselwa ukulawula ukufiphala kwamalambu e-fluorescent. Manje, ngenxa yokuthi ukunikezwa kwamandla okuqhubekayo kwengezwa kumojula yomshayeli we-LED futhi kukhona isifunda sokulawula esizinikezele, ngakho-ke i-0 -10V dimmer ingaphinde isekele inani elikhulu lokukhanyisa kwe-LED. Kodwa-ke, ukushiyeka kwesicelo nakho kusobala kakhulu. Izimpawu zokulawula i-low-voltage zidinga isethi eyengeziwe yemigqa, okwandisa kakhulu izidingo zokwakha.

2. Ukufiphala kwe-DMX512: Iphrothokholi ye-DMX512 yaqalwa yathuthukiswa yi-USITT (i-United States Institute of Theatre Technology) yaba isixhumi esibonakalayo esijwayelekile sedijithali kusuka kukhonsoli ukuze kulawulwe i-dimmer. I-DMX512 idlula amasistimu e-analog, kodwa ayikwazi ukufaka esikhundleni ngokuphelele amasistimu e-analog. Ubulula be-DMX512, ukwethembeka (uma ifakiwe futhi isetshenziswa ngendlela efanele), kanye nokuguquguquka kuyenza ibe umthetho olandelwayo ozikhethelayo uma izimali zivuma. Kuzinhlelo zokusebenza ezingokoqobo, indlela yokulawula ye-DMX512 ngokuvamile iwukuklama ukunikezwa kwamandla nesilawuli ndawonye. Isilawuli se-DMX512 silawula imigqa engu-8 kuya kwengu-24 futhi sishayela ngokuqondile imigqa ye-RBG yamalambu e-LED. Kodwa-ke, ekwakheni amaphrojekthi okukhanyisa, ngenxa yobuthakathaka bemigqa ye-DC, kuyadingeka ukufaka isilawuli cishe ngamamitha angu-12, futhi ibhasi lokulawula likwimodi efanayo. , ngakho-ke, isilawuli sinezintambo eziningi, futhi ezimweni eziningi akunakwenzeka ngisho nokwakha.

3. Ukufiphalisa i-Triac: Ukufiphalisa kwe-Triac sekusetshenziswe amalambu e-incandescent namalambu okonga amandla isikhathi eside. Futhi kuyindlela esetshenziswa kakhulu yokufiphala kwe-LED. I-SCR dimming iwuhlobo lokufiphala ngokomzimba. Kusukela ku-AC isigaba 0, amandla kagesi okufakwayo agawula abe amagagasi amasha. Akukho okokufaka kwe-voltage kuze kube yilapho i-SCR ivuliwe. Umgomo wokusebenza ukukhiqiza i-tangential output voltage waveform ngemuva kokusika i-waveform ye-voltage yokufaka nge-engeli conduction. Ukusebenzisa isimiso se-tangential kunganciphisa inani elisebenzayo le-voltage ephumayo, ngaleyo ndlela kunciphise amandla emithwalo evamile (imithwalo ephikisanayo). I-Triac dimmers inezinzuzo zokunemba okuphezulu kokulungiswa, ukusebenza kahle okuphezulu, usayizi omncane, isisindo esilula, nokulawula kude okulula, futhi ilawula imakethe.

4. Ukufiphalisa kwe-PWM: Ubuchwepheshe bokuguquguquka kobubanzi be-Pulse (PWM-Pulse Width Modulation) bubona ukulawulwa kwamasekhethi e-analog ngokusebenzisa ukulawulwa kokucisha kwe-inverter circuit circuit. I-waveform okukhiphayo yobuchwepheshe bokushintshwa kwe-pulse wide iwuchungechunge lwama-pulses anosayizi olinganayo asetshenziselwa ukufaka esikhundleni se-waveform oyifunayo.

Sithatha i-sine wave njengesibonelo, okungukuthi, ukwenza i-voltage elinganayo yalolu chungechunge lwama-pulses ibe yi-sine wave, nokwenza ama-pulses okukhiphayo ashelele ngangokunokwenzeka futhi abe nama-harmonics ane-oda eliphansi. Ngokwezidingo ezihlukene, ububanzi be-pulse ngayinye bungalungiswa ngokufanele ukuze kushintshwe i-voltage ephumayo noma imvamisa yokuphuma, ngaleyo ndlela kulawulwa isekethe ye-analog. Kalula nje, i-PWM iyindlela yokufaka amakhodi ngedijithali amazinga esiginali ye-analog.

Ngokusetshenziswa kwezinto zokubala ezinokulungiswa okuphezulu, isilinganiso sokuhlala segagasi lesikwele siyashintshwa ukuze kuhlanganiswe izinga lesignali ethile ye-analog. Isiginali ye-PWM iseyidijithali ngoba nganoma isiphi isikhathi, amandla e-DC esikali esigcwele akhona ngokugcwele noma awekho ngokuphelele. I-voltage noma umthombo wamanje usetshenziswa kumthwalo olingisiwe ngokulandelana okuphindaphindayo kokuvula noma ukuvala ama-pulses. Uma amandla avuliwe, yilapho amandla kagesi e-DC engezwa emlayishweni, futhi uma ecishiwe, kulapho ugesi unqanyulwa khona.

Uma imvamisa yokukhanya nobumnyama idlula u-100Hz, lokho iso lomuntu elikubonayo ukukhanya okumaphakathi, hhayi ukukhanya kwe-LED. I-PWM ilungisa ukukhanya ngokulungisa ingxenye yesikhathi esikhanyayo nesimnyama. Kumjikelezo we-PWM, ngenxa yokuthi ukukhanya okubonwa yiso lomuntu ngokucwayiza kokukhanya okukhulu kuno-100Hz kuyinqubo enqwabelanayo, okungukuthi, isikhathi esikhanyayo sihlanganisa ingxenye enkulu yawo wonke umjikelezo. Njengoba inkulu, izwakala nakakhulu emehlweni omuntu.

5. Ukufiphaza kwe-DALI: Izinga le-DALI lichaze inethiwekhi ye-DALI, okuhlanganisa nenani eliphakeme lamayunithi angama-64 (angakhulunywa ngokuzimela), amaqembu ayi-16 nezigcawu eziyi-16. Amayunithi okukhanyisa ahlukene ebhasini le-DALI angahlelwa kalula ukuze kuzuzwe ukulawulwa kwesigcawu nokuphathwa okuhlukile. Kuzinhlelo zokusebenza ezingokoqobo, isilawuli esijwayelekile se-DALI silawula izibani ezifika ku-40 kuye kwezingu-50, ezingahlukaniswa ngamaqembu angu-16, futhi zingacubungula izenzo ezithile ngokuhambisana. Kunethiwekhi ye-DALI, imiyalo yokulawula engama-30 kuye kwangama-40 ingacutshungulwa ngomzuzwana. Lokhu kusho ukuthi isilawuli sidinga ukuphatha imiyalelo yokufiphalisa okungu-2 ngomzuzwana weqembu ngalinye lokukhanyisa.