Ubude bokukhanya kwesityalo bufaneleke kakhulu ekukhuleni, ukuqhakaza, ukuqhama kwezityalo.Ngokuqhelekileyo, izityalo zangaphakathi kunye neentyantyambo ziya kukhula ngakumbi kwaye zibuhlungu ngokuhamba kwexesha, ngokukodwa ngenxa yokungabikho kokukhanya kokukhanya.Ngokukhanyisa isityalo ngezibane ze-LED ezifanelekileyo kwi-spectrum efunwa sisityalo, kungekhona nje ukukhula kwayo kunokukhuthazwa, kodwa ixesha leentyantyambo lingandiswa kwaye umgangatho wentyatyambo unokuphuculwa.Ukusetyenziswa kwale nkqubo yokukhanya okuphezulu kakhulu kwimveliso yezolimo efana nezindlu zokugcina izityalo, ii-greenhouses kunye nezinye izibonelelo zinokucombulula iintsilelo zokungonelanga kwelanga okukhokelela ekwehleni kwencasa yemifuno ye-greenhouse efana neetumato kunye neekhukhamba, kwaye kwelinye icala, inokwenza iziqhamo kunye nemifuno kwi-greenhouse greenhouse ukuya emarikeni ngaphambi nasemva koMnyhadala waseNtwasahlobo, ukuze kuphunyezwe injongo yokulima ngaphandle kwexesha lokulima.
Kuba ubushushu besiphambuka bunokumiselwa ngumndilili wokuchithwa kwamandla, nemisinga emikhulu yokuvuthuza inefuthe elincinane ekuchitheni amandla.Ngokomzekelo, kwi-converter ye-buck, i-peak-to-peak ripple yangoku ilingana ne-DC output current (Ipk-pk=Iout) ayifaki ngaphezu kwe-10% yelahleko yamandla iyonke.Ukuba amanqanaba elahleko angentla agqithiswe kakuhle, i-AC ripple current evela kunikezelo lwamandla kufuneka incitshiswe ukuze kugcinwe ubushushu besiphambuka kunye nobomi bokusebenza bungatshintshi.Umgaqo oluncedo kakhulu wobhontsi kukuba kwi-10 degrees Celsius ehlayo kwiqondo lobushushu le-junction, ubomi be-semiconductor bonyuka ngokuphindwe kathathu.Ngapha koko, uninzi loyilo lukholisa ukuba nemisinga esezantsi yeripple ngenxa yokulahlwa kwe-inductor.Ukongezelela, i-peak current kwi-LED ayifanele idlule umlinganiselo ophezulu wokusebenza ngokukhuselekileyo ochazwe ngumenzi.
Xa uqhuba i-LED nge-buck regulator, i-LED ihlala iqhuba i-AC ripple yangoku kunye ne-DC yangoku ye-inductor ngokwenkqubo ekhethiweyo yokucoca imveliso.Oku akuyi kwandisa kuphela i-RMS amplitude yangoku kwi-LED, kodwa kwandise ukusetyenziswa kwayo kwamandla.Oku kwandisa ubushushu besiphambuka kwaye kunempembelelo ebalulekileyo kubomi be-LED.Ukuba sibeka umda we-70% wokukhanya okuphumayo njengobomi be-LED, ngoko ixesha lokuphila kwe-LED liyandiswa ukusuka kwiiyure ezingama-74 kwi-15,000 degrees Celsius ukuya kwiiyure ezingama-40,000 kuma-63 degrees Celsius.Ukulahleka kwamandla e-LED kugqitywa ngokuphindaphinda ukuxhathisa kwe-LED ngesikwere se-RMS yangoku kunye nomyinge wangoku ophindwe ngokuhla kwamandla ombane.
Ngaphantsi kwe-LED yokuvula i-threshold (i-voltage yokuvula i-voltage ye-LED emhlophe imalunga ne-3.5V), okwangoku nge-LED incinci kakhulu.Ngaphezulu kwalo mda, umsinga uphindaphindwa ngokubonakalayo njengombane ohamba phambili.Oku kuvumela i-LED ukuba ibunjwe njengomthombo wombane kunye ne-resistor series kunye nesilumkiso sokuba le modeli isebenza kuphela kwi-DC enye yokusebenza yangoku.Ukuba i-DC yangoku kwi-LED iyatshintsha, ukuchasana kwemodeli kufuneka kwakhona kutshintshe ukubonisa umbane omtsha wokusebenza.Kwimisinga emikhulu yangaphambili, ukuchithwa kwamandla kwi-LED kutshisa isixhobo, esitshintsha ukuhla kombane wangaphambili kunye ne-impedance eguqukayo.Kubaluleke kakhulu ukuqwalasela ngokupheleleyo indawo yokutshatyalaliswa kobushushu xa umisela ukuxhatshazwa kwe-LED.
Ukukhanya okulungiswayo kufuna umbane oqhubekayo ukuqhuba i-LED, ekufuneka igcinwe ingatshintshi kungakhathaliseki ukuba igalelo lombane.Oku kulucelomngeni kunokudibanisa ibhalbhu ye-incandescent kwibhetri ukuyinika amandla.
Ixesha lokuposa: Nov-16-2022