Ndi malo ati omwe ali abwino kwambiri kuti mbewu zikule?

Kutalika kwa kuwala kwa zomera ndi koyenera kwambiri kukula, maluwa, fruiting ya zomera.Nthawi zambiri, mbewu zamkati ndi maluwa zimakula ndikuipiraipira pakapita nthawi, makamaka chifukwa chosowa kuwala.Mwa kuunikira chomeracho ndi nyali za LED zoyenerera mawonekedwe ofunikira ndi chomera, sikuti kukula kwake kungapitirizidwe, koma nthawi yamaluwa imatha kukulitsidwa komanso mtundu wamaluwawo ukhoza kusintha.Kugwiritsa ntchito njira yowunikira yowunikira kwambiri pakupanga ulimi monga greenhouses, greenhouses ndi malo ena kumatha kuthetsa kuipa kwa dzuwa losakwanira lomwe limapangitsa kuchepa kwa kukoma kwa masamba owonjezera kutentha monga tomato ndi nkhaka, ndi mbali inayo, imathanso kupangitsa kuti zipatso ndi ndiwo zamasamba zobiriwira zobiriwira zizipita kumsika zisanachitike komanso pambuyo pa Chikondwerero cha Spring, kuti akwaniritse cholinga cha kulima kwanthawi yayitali.

Popeza kutentha kwa mphambano kungadziwike ndi kutayika kwa mphamvu kwapakati, ngakhale mafunde akuluakulu amadzimadzi alibe mphamvu zochepa pa kutaya mphamvu.Mwachitsanzo, mu chosinthira chandalama, nsonga-mpaka-pansonga yaposachedwa yofanana ndi yapano ya DC (Ipk-pk=Iout) sichimawonjezera 10% ya kutayika kwathunthu kwa mphamvu.Ngati milingo yotayika yomwe ili pamwambayi yapyola bwino, mphamvu yamagetsi ya AC yochokera pamagetsi iyenera kuchepetsedwa kuti kutentha kwa mphambano ndi moyo wogwirira ntchito ukhale wokhazikika.Lamulo lothandiza kwambiri la chala chachikulu ndikuti pa 10 digiri Celsius kuchepa kwa kutentha kwa mphambano, moyo wa semiconductor umakwera katatu.M'malo mwake, mapangidwe ambiri amakhala ndi mafunde otsika chifukwa cha kukana kwa inductor.Kuphatikiza apo, chiwongola dzanja chamakono mu LED sichiyenera kupitilira kuchuluka kwachitetezo komwe kumaperekedwa ndi wopanga.

Mukamayendetsa ma LED kudzera pa chowongolera chowongolera, ma LED nthawi zambiri amayendetsa ma AC ripple current ndi DC apano a inductor molingana ndi makonzedwe osankhidwa a fyuluta.Izi sizingowonjezera kukula kwa RMS komweku mu LED, komanso kukulitsa mphamvu zake.Izi zimawonjezera kutentha kwa mphambano ndipo zimakhudza kwambiri moyo wa LED.Ngati tiyika malire a 70% otulutsa kuwala monga nthawi ya moyo wa LED, ndiye kuti nthawi ya moyo wa LED imachokera ku maola 74 pa 15,000 madigiri Celsius mpaka maola 40,000 pa madigiri 63 Celsius.Kutayika kwa magetsi kwa LED kumatsimikiziridwa ndi kuchulukitsa kukana kwa LED ndi sikweya ya RMS yapano komanso pafupifupi yomwe ikuchulukitsidwa ndi kutsika kwamagetsi akutsogolo.

Pansi pa chiwongolero cha kuyatsa kwa LED (kutsegula kwamagetsi kwa ma LED oyera ndi pafupifupi 3.5V), komweko kudzera pa LED ndikocheperako.Pamwamba pa malire awa, magetsi akuchulukirachulukira ngati voteji yakutsogolo.Izi zimathandiza kuti LED ipangidwe ngati gwero lamagetsi lokhala ndi zotsutsa zotsatizana ndi chenjezo lakuti chitsanzochi chimagwira ntchito pa DC imodzi yokha.Ngati magetsi a DC mu LED asintha, kukana kwachitsanzo kuyeneranso kusintha kuti ziwonetsere ntchito yatsopano.Pamafunde akulu akutsogolo, kutayika kwamagetsi mu LED kumatenthetsa chipangizocho, chomwe chimasintha kutsika kwa voliyumu yakutsogolo ndi kuyimitsa kwamphamvu.Ndikofunikira kwambiri kuganizira mozama za kutentha kwa kutentha podziwa kulepheretsa kwa LED.

Kuwala kosinthika kumafuna magetsi okhazikika kuti ayendetse ma LED, omwe amayenera kukhala osasunthika mosasamala kanthu za voteji yolowera.Izi ndizovuta kwambiri kusiyana ndi kungolumikiza nyale ya incandescent ku batire kuti iyambitse.