Kureba kwechiedza chechirimwa chakanyatsokodzera kukura, maruva, fruiting yemiti.Kazhinji, zvirimwa zvemukati nemaruva zvichakura zvakanyanya uye zvakanyanya nekufamba kwenguva, kunyanya nekuda kwekushaikwa kwechiedza.Nekuvhenekera chirimwa nemwenje ye LED inokodzera iyo spectrum inodiwa nechirimwa, kwete chete kukura kwayo kunogona kusimudzirwa, asi nguva yemaruva inogonawo kuwedzerwa uye kunaka kweruva kunogona kuvandudzwa.Iko kushandiswa kweiyi yakakwirira-inoshanda mwenje sosi sisitimu mukugadzirwa kwekurima senge magreenhouses, greenhouses nezvimwe zvivakwa zvinogona kugadzirisa kusakwana kwekushayikwa kwezuva kunotungamira kuderera kwekuravira kwemuriwo wegreenhouse sematomatisi nemagaka, uye kune rumwe rutivi, inogona zvakare kuita yechando greenhouse tomato michero nemiriwo kuenda pamusika pamberi uye mushure meMutambo weChirimo, kuitira kuti uwane chinangwa chekurima-kunze kwemwaka.
Sezvo tembiricha yejunction ichigona kutariswa neavhareji yekuparara kwemagetsi, kunyangwe mafungu makuru emvura ane simba shoma pakuparara kwemagetsi.Semuyenzaniso, mushanduri yebhandi, peak-to-peak ripple current yakaenzana neDC inobuda ikozvino (Ipk-pk=Iout) haiwedzeri kudarika 10% yesimba rose rekurasikirwa.Kana iwo mazinga ekurasikirwa ari pamusoro akapfuudzwa, iyo AC ripple ikozvino kubva kune magetsi inoda kudzikiswa kuti ichengetedze tembiricha yejunction uye hupenyu hwekushandisa.Mutemo unobatsira zvikuru wechigunwe ndewekuti pamadhigirii gumi ega ega kuderera kwetembiricha yekusangana, hupenyu hwesemiconductor hunowedzera zvakapetwa katatu.Muchokwadi, akawanda magadzirirwo anowanzo kuve neakaderera ripple currents nekuda kwekurambwa kweinductor.Uye zvakare, iyo peak ikozvino mu LED haifanirwe kudarika yakanyanya yakachengeteka inoshanda yazvino chiyero inotsanangurwa nemugadziri.
Paunenge uchityaira LED kuburikidza ne buck regulator, iyo LED inowanzo itisa iyo AC ripple ikozvino uye DC yazvino yeinductor zvinoenderana neyakasarudzwa yekubuda sefa kurongeka.Izvi hazvingo wedzera iyo RMS amplitude yezvino mu LED, asi zvakare kuwedzera simba rayo kushandisa.Izvi zvinowedzera tembiricha yekusangana uye zvine mhedzisiro yakakosha pahupenyu hwe LED.Kana tikaisa 70% chiedza chekubuda muganho sehupenyu hwe LED, ipapo hupenyu hwe LED hunowedzerwa kubva pamaawa makumi manomwe nemana pa 15,000 madhigirii celsius kusvika 40,000 maawa pa 63 degrees Celsius.Kurasikirwa kwemagetsi kwe LED kunotemwa nekuwanza kupikisa kwe LED neskweya yeRMS yazvino pamwe neavhareji iripo inowedzerwa nekudonha kwemagetsi kumberi.
Pazasi pe LED turn-on pachikumbaridzo (iyo yekutendeuka-on voltage chikumbaridzo chechena LEDs inosvika 3.5V), iyo iripo kuburikidza ne LED idiki kwazvo.Pamusoro pechikumbaridzo ichi, ikozvino inowedzerwa zvakanyanya semhepo yekumberi.Izvi zvinobvumira iyo LED kuti iumbwe se voltage sosi ine yakatevedzana resistor ine yambiro yekuti iyi modhi inongoshanda pane imwechete inoshanda DC ikozvino.Kana iyo DC iripo mu LED ichichinja, kuramba kweiyo modhi kunofanirawo kuchinja kuratidza hutsva hwekushandisa ikozvino.Pamhepo huru yekumberi, kupera kwemagetsi mu LED kunopisa mudziyo, unoshandura kudonha kwemagetsi kumberi uye kusimba kwesimba.Izvo zvakakosha kuti utarise zvizere nharaunda yekupisa kupisa kana uchitarisa iyo impedance ye LED.
Kupenya kunogadziriswa kunoda nguva dzose ikozvino kuti ityaire LED, iyo inofanirwa kuchengetedzwa nguva dzose pasinei nekuisa magetsi.Izvi zvinonetsa pane kungobatanidza girobhu reincandescent kubhatiri kuti riite simba.
Nguva yekutumira: Nov-16-2022