Ubude begagasi bokukhanya kwesitshalo bufaneleka kakhulu ekukhuleni, ukuqhakaza, ukuthela izitshalo.Ngokuvamile, izitshalo nezimbali zasendlini zizokhula zibe zimbi kakhulu ngokuhamba kwesikhathi, ikakhulukazi ngenxa yokuntuleka kokuchayeka kokukhanya.Ngokukhanyisa isitshalo ngezibani ze-LED ezifanele i-spectrum edingwa yisitshalo, hhayi kuphela ukukhula kwaso okungakhuthazwa, kodwa isikhathi sokuqhakaza singanwetshwa futhi izinga lembali lingathuthukiswa.Ukusetshenziswa kwalolu hlelo olusebenza kahle kakhulu lomthombo wokukhanya ekukhiqizeni ezolimo njengezindlu zokugcina izithombo, izindawo zokugcina izithombo kanye nezinye izinsiza kungaxazulula ububi bokukhanya kwelanga okwanele okuholela ekwehleni kokunambitheka kwemifino ebamba ukushisa efana notamatisi namakhukhamba, futhi ngakolunye uhlangothi, kungenza futhi ukuthi izithelo nemifino katamatisi we-greenhouse ebusika kungene emakethe ngaphambi nangemuva koMkhosi Wasentwasahlobo, ukuze kufezwe inhloso yokutshala ngaphandle kwesizini.
Njengoba izinga lokushisa lendawo ehlanganayo linganqunywa ngokwesilinganiso sokushabalaliswa kwamandla, ngisho namaza amakhulu agelezayo awanawo umthelela omncane ekushabalaleni kwamandla.Isibonelo, kusiguquli sembabala, ukunyakazisa kwe-peak-to-peak current elingana ne-DC output current (Ipk-pk=Iout) awengezi ngaphezu kuka-10% wengqikithi yokulahleka kwamandla.Uma amaleveli okulahlekelwa angenhla eqiwe kahle, i-AC ripple current evela kumandla kagesi idinga ukuncishiswa ukuze kugcinwe izinga lokushisa lenhlukana nempilo yokusebenza ingashintshi.Umthetho owusizo kakhulu wesithupha ukuthi kuwo wonke amadigri angu-10 ukwehla kwezinga lokushisa lokuhlangana, isikhathi sempilo ye-semiconductor sikhuphuka ngokuphindwe kathathu.Eqinisweni, imiklamo eminingi ivame ukuba namaza aphansi e-ripple ngenxa yokwenqatshwa kwe-inductor.Ngaphezu kwalokho, inani eliphakeme lamanje ku-LED akufanele lidlule isilinganiso esiphezulu sokusebenza esiphephile esishiwo umenzi.
Uma ushayela i-LED ngesilawuli sembabala, i-LED ivamise ukuphatha i-AC ripple current kanye ne-DC current ye-inductor ngokuya ngohlelo lwesihlungi esikhethiwe.Lokhu ngeke nje kwandise i-RMS amplitude yamanje ku-LED, kodwa futhi kwandise ukusetshenziswa kwayo kwamandla.Lokhu kwandisa izinga lokushisa lokuhlangana futhi kunomthelela omkhulu empilweni yonke ye-LED.Uma sibeka umkhawulo wokuphuma kokukhanya okungu-70% njengesikhathi sokuphila se-LED, khona-ke isikhathi sokuphila kwe-LED sinwetshwa sisuka emahoreni angama-74 ku-15,000 degrees Celsius siye emahoreni angu-40,000 ku-63 degrees Celsius.Ukulahleka kwamandla kwe-LED kunqunywa ngokuphindaphinda ukumelana ne-LED ngesikwele se-RMS yamanje kanye nesilinganiso samanje esiphindaphindwa ukwehla kwamandla kagesi aya phambili.
Ngaphansi komkhawulo we-LED (umkhawulo we-voltage wokuvula wama-LED amhlophe cishe u-3.5V), owamanje nge-LED mancane kakhulu.Ngaphezulu kwalo mkhawulo, i-current iphindaphindeka ngokuqhubekayo njenge-voltage eya phambili.Lokhu kuvumela i-LED ukuthi ibunjwe njengomthombo wamandla kagesi onesixhasi sochungechunge esinesexwayiso sokuthi le modeli isebenza kuphela kwi-DC eyodwa yokusebenza yamanje.Uma i-DC yamanje ku-LED ishintsha, ukumelana kwemodeli kufanele futhi kushintshe ukuze kubonise ukusebenza kwamanje okusha.Kumaza amakhulu aya phambili, ukuchithwa kwamandla ku-LED kushisisa idivayisi, okushintsha ukwehla kwe-voltage eya phambili kanye ne-impedance enamandla.Kubaluleke kakhulu ukucabangela ngokugcwele indawo yokukhishwa kokushisa lapho unquma ukuvinjelwa kwe-LED.
Ukukhanya okushintshashintshayo kudinga yamanje njalo ukushayela LED, okufanele igcinwe njalo kungakhathaliseki voltage okokufaka.Lokhu kuyinselele kakhulu kunokumane uxhume isibani se-incandescent nebhethri ukuze uyinike amandla.
Isikhathi sokuthumela: Nov-16-2022