I-Meanwell Driver:Idizayini Yamandla Eqhubekayo ye-LED Driver
Muva nje, esinye sezihloko ezidume kakhulu embonini yamandla e-LED amandla angapheli we-LED. Kungani ama-LED kufanele ashayelwe amandla angaguquki? Kungani bengakwazi ukuqhutshwa ngamandla angapheli? Ngaphambi kokuxoxa ngalolu daba, kufanele siqale siqonde ukuthi kungani i-LED kufanele ishayelwe amandla angaguquki. Njengoba kuboniswe ijika le-LED legrafu, lapho i-voltage eya phambili ye-LED ishintsha ngo-2.5%, yamanje nge-LED izoshintsha cishe ngo-16%, futhi i-voltage eya phambili ye-LED ithintwa kalula izinga lokushisa. Umehluko wezinga lokushisa phakathi kwamazinga okushisa aphezulu naphansi uzobangela ngisho nogesi. Umehluko kagesi ungaphezu kuka-20%. Ngaphezu kwalokho, ukukhanya kwe-LED kuhambisana namanje ngaphambili kwe-LED. Umehluko wamanje owedlulele uzoholela ekushintsheni kokukhanya okudlulele, ngakho-ke i-LED kufanele ishayelwe amandla amanje. Nokho, ingabe idrayivu yamandla engaguquki ingasetshenziselwa i-LED? Okokuqala, kuxoxwa ngendaba yokuthi amandla angaguquki alingana nokukhanya okungapheli. Ngokombono wokuxoxa nje ngokuklama komshayeli wamandla angaguquki, ukuguqulwa kwe-LED kanye nejika lokushisa kubonakala kungenzeka. Kungani umenzi womshayeli we-LED engaklami ngokuqondile umshayeli wamandla ongaguquki? Kunezizathu eziningi ezihilelekile. Akunzima ukuklama isifunda samandla esingashintshi. Kulula kakhulu ukusebenzisa i-MCU (I-Micro Controller Unit) ukuthola amandla kagesi aphumayo kanye neyamanje, ukulawula isikhathi sesibopho se-PWM (Pulse Width Modulation) ngokubala uhlelo, nokulawula amandla okukhiphayo kujika lamandla aluhlaza okwesibhakabhaka. . Ukuphuma kwamandla okungaguquki kungafinyelelwa, kodwa le ndlela inyusa izindleko eziningi, futhi lapho kwenzeka umonakalo wesifunda esifushane, umshayeli wamandla we-LED ongaguquki uzokhuphula owamanje ngenxa yokutholwa kwamandla kagesi aphansi, okungase kubangele ukulimala okukhulu. Ngaphezu kwalokho, isici sokushisa se-LED yi-coefficient yokushisa engalungile. Uma izinga lokushisa liphezulu, silindele ukunciphisa okukhiphayo ukuze sigcine ukusebenza kwempilo ende ye-LED. Nokho, indlela yamandla engaguquki ayihambisani nalokhu kucatshangelwa. Ekusetshenzisweni kwezinga lokushisa eliphezulu kwe-LED, amandla amanje okukhipha umshayeli we-LED ayanda ngenxa yokutholwa kwamandla aphansi. Uma kucatshangelwa zonke lezi zici ezingenhla, iyisixazululo esisebenza kahle kakhulu sokuhlinzeka amakhasimende ngomshayeli we-LED "quasi-constant power" onebanga elibanzi lamandla kagesi/okukhiphayo kwamanje.
Umshayeli we-LED wamandla angaguquki olebulwe eminye imikhiqizo ye-Meanwell usebenzisa lolu hlobo lomklamo wokuthuthukisa amandla oqhubekayo ngokukhethekile. Inhloso ukuhlinzeka amakhasimende ngezinhlobonhlobo eziningi zama-voltage/amanje okukhiphayo okuyi-quasi-constant power LED driver. Ngeke nje icabangele izidingo zabasebenzisi futhi igweme ukukhuphuka kwezindleko okubangelwa ukuklama ngokweqile noma inkinga ebangelwa izici ze-LED, kodwa futhi ibangele ukuhluleka kwesibani futhi inikeze i-quasi-constant. Umklamo obanzi wemikhiqizo yamandla kungathiwa uyisixazululo esisebenza kahle kakhulu sokunikezwa kwamandla okushayela kwe-LED emakethe njengamanje.