Esinye sezihloko ezishisa izikhotha kamuva njeI-LEDimboni yokuphakelwa kwamandla iholwa njalo amandla okushayela. Kungani ama-LED kufanele ashayelwe amandla angaguquki? Kungani ungakwazi ukushayela njalo amandla?

Ngaphambi kokuxoxa ngalesi sihloko, kufanele siqale siqonde ukuthi kungani ama-LED kufanele ashayelwe amandla angaguquki?

Njengoba kuboniswe ijika le-LED IV esithombeni (a), lapho i-voltage eya phambili ye-LED ishintsha ngo-2.5%, yamanje edlula ku-LED izoshintsha cishe ngo-16%, futhi i-voltage eya phambili ye-LED ithintwa kalula izinga lokushisa. Umehluko wokushisa phakathi kwamazinga okushisa aphezulu naphansi uzokwenza ngisho negebe lokushintsha kwamandla kagesi libe phezulu libe ngaphezu kuka-20%. Ukwengeza, ukukhanya kwe-LED kuhambisana ngokuqondile namanje phambili kwe-LED, futhi umehluko wamanje owedlulele uzodala ukuguqulwa kokukhanya okwedlulele, Ngakho-ke, i-LED kumele iqhutshwe amandla amanje.

Noma kunjalo, ingabe ama-LED angaqhutshwa ngamandla angapheli? Okokuqala, ngaphandle kodaba lokuthi amandla angaguquki alingana nokukhanya okungaguquki, kubonakala kungenzeka ukumane uxoxe ngokuklama komshayeli wamandla njalo ngokombono wokushintsha kwe-LED IV kanye nejika lokushisa. Khona-ke kungani abakhiqizi babashayeli be-LED bengaklami ngokuqondile abashayeli be-LED abanamadrayivu wamandla angaguquki? Kunezizathu eziningi ezihilelekile. Akunzima ukuklama intambo yamandla engashintshi. Inqobo nje uma ihlanganiswe ne-MCU (iyunithi yesilawuli esincanyana) ukuthola amandla kagesi aphumayo kanye neyamanje, lawula umjikelezo wemfanelo we-PWM (i-pulse wide modulation) ngokubala uhlelo, futhi ulawule amandla okukhiphayo kujika lamandla angaguquki aluhlaza okwesibhakabhaka esithombeni (b ), ukuphuma kwamandla okungaguquki kungafinyelelwa, kodwa le ndlela inyusa izindleko eziningi, Ngaphezu kwalokho, uma kwenzeka umonakalo wesifunda esifushane se-LED, umshayeli we-LED wamandla angaguquki uzokwandisa amandla amanje ngenxa yokubona i-voltage ephansi, engase ibangele okukhulu. umonakalo. Ngaphezu kwalokho, isici sokushisa kwe-LED yi-coefficient yokushisa engalungile. Uma izinga lokushisa liphezulu, silindele ukunciphisa okukhiphayo ukuze sigcine ukusebenza okuphezulu kwempilo ye-LED. Nokho, indlela yamandla engaguquki iyangqubuzana nalokhu kucatshangelwa. Ezinhlelweni zokushisa eziphakeme ze-LED, umshayeli we-LED wandisa ukuphuma kwamanje ngoba ithola i-voltage ephansi.

Uma kucatshangelwa lezi zici ezingenhla, umshayeli we-LED "quasi constant power" ohlinzeka amakhasimende ngohlu olubanzi lwamandla kagesi / okukhiphayo kwamanje yisixazululo esingabizi kakhulu kumakhasimende. Umshayeli we-LED wamandla angaguquki omakwe eminye imikhiqizo ye-Mingwei wamukela umklamo olungiselelwe walolu hlobo lwamandla angaguquki, okuhloswe ngawo ukuhlinzeka amakhasimende ngohlu olubanzi lokuphuma kwamandla kagesi / kwamanje. Ayikwazi ukuhlangabezana nezidingo zabasebenzisi kuphela, kodwa futhi igweme ukukhuphuka kwezindleko okubangelwa ukuklama okungaphezulu noma inkathazo ebangelwa izici ze-LED, futhi ibangele nokwehluleka kwesibani, Ukuhlinzeka ngemikhiqizo eminingi yokuklama enamandla afanayo afanayo kungashiwo ukuthi ikhambi elisebenza kahle kakhulu lokunikezwa kwamandla okushayela kwe-LED emakethe.