Izingxenye eziyinhloko zeizikrini ze-LED zasendlinifuthiizibonisi ze-LED zangaphandle ama-LED nama-driver chips, okungaweqoqo lemikhiqizo ye-microelectronic. I-voltage yokusebenza yama-LED icishe ibe ngu-5V, kanti amandla okusebenza ajwayelekile angaphansi kuka-20 mA. Izici zayo zokusebenza zinquma ukuthi isengozini kakhulu kugesi omile kanye ne-voltage engavamile noma ukushaqeka kwamanje. Ngakho-ke, abakhiqizi besibonisi se-LED badinga ukuthatha izinyathelo zokuvikela isibonisi se-LED ngesikhathi sokukhiqiza nokusetshenziswa. Ukubekwa phansi kwamandla kuyindlela yokuvikela evame ukusetshenziswa kakhulu ekubonisweni okuhlukahlukene kwe-LED.
Kungani kufanele kumiswe ukunikezwa kwamandla? Lokhu kuhlobene nemodi yokusebenza yokushintsha kwamandla kagesi. Umthombo wethu wamandla okushintsha isibonisi se-LED iyidivayisi eguqula amapayipi amakhulu e-AC 220V ibe amandla aphumayo aqinile e-DC 5V DC ngochungechunge lwezindlela ezifana nokuhlunga-ukulungisa-ukuguquguquka kwe-modulation-output rectification-filtering .
Ukuze kuqinisekiswe ukuzinza kokuguqulwa kwe-AC/DC kokuphakelwa kwamandla, umenzi wokuphakela amandla uxhuma isekethe yesihlungi se-EMI ukusuka kuntambo ephilayo ukuya ocingweni lwaphansi ekwakhiweni kwesekethe yetheminali yokufaka ye-AC 220V ngokuya ngesibopho kazwelonke se-3C. ejwayelekile. Ukuze kuqinisekiswe ukuzinza kokokufaka kwe-AC 220V, zonke izinsiza zikagesi zizovuza isihlungi ngesikhathi sokusebenza, futhi ukuvuza kwamanje kokuphakelwa kwamandla okukodwa cishe ku-3.5mA. I-voltage yokuvuza imayelana ne-110V.
Uma isikrini esibonisiwe se-LED singasekelwe phansi, ukuvuza kwamanje kungase kubangele ukulimala kwe-chip noma ukusha kwesibani. Uma kusetshenziswa izinto zikagesi ezingaphezu kuka-20, amandla avuzayo anqwabelene afinyelela ngaphezu kuka-70mA. Kwanele ukwenza isivikelo sokuvuza sisebenze futhi sinqamule ukunikezwa kwamandla. Lesi futhi isizathu esenza isikrini sethu sokubonisa singakwazi ukusebenzisa isivikeli sokuvuza.
Uma isivikelo sokuvuza singaxhumekile futhi isikrini sokubonisa i-LED singasekelwe phansi, ukuvuza kwamanje okubekwe ngaphezulu kwamandla kagesi kuzodlula amandla amanje aphephile omzimba womuntu, futhi i-voltage ye-110V yanele ukubangela ukufa! Ngemuva kokumiswa phansi, i-voltage yegobolondo yokunikezela amandla isondele ku-0 emzimbeni womuntu. Kubonisa ukuthi awukho umehluko ongaba khona phakathi kwamandla kagesi kanye nomzimba womuntu, futhi ukuvuza kwamandla kuholelwa phansi. Ngakho-ke, isibonisi se-LED kufanele sibekwe phansi.
Ngakho-ke, isisekelo esijwayelekile kufanele sibukeke kanjani? Kunamatheminali angu-3 ekugcineni kokufaka amandla, okuyitheminali yentambo ebukhoma, itheminali yezintambo ezimaphakathi kanye netheminali yaphansi. Indlela efanele yokubeka phansi iwukusebenzisa intambo ekhethekile ephuzi-luhlaza enombala ophindwe kabili ukuze kubekwe phansi ukuze kuxhunywe wonke amatheminali angaphansi kwamandla ngochungechunge futhi akhiye, bese uwakhipha uwayise kutheminali yaphansi.
Lapho sigxiliwe, ukumelana komhlabathi kufanele kube ngaphansi kwama-ohms angu-4 ukuze kuqinisekiswe ukukhishwa okufika ngesikhathi kokuvuza kwamanje. Kumele kuqashelwe ukuthi lapho indawo yokugcina umbani yokuvikela umbani ikhipha amandla ombani, kuthatha isikhathi esithile ngenxa yokusabalalisa kwamandla aphansi, futhi amandla aphansi azokhuphuka ngesikhathi esifushane. Uma ukubekwa phansi kwesikrini sokubonisa se-LED kuxhunywe kutheminali ephansi yokuvikela umbani, khona-ke amandla aphansi Aphakeme kunesikrini sokubonisa, amandla ombani azodluliselwa emzimbeni wesikrini eduze kwentambo yaphansi, okubangele ukulimala kwemishini. Ngakho-ke, isisekelo esiyisivikelo sesibonisi se-LED ngeke sixhunywe kutheminali ephansi yokuvikela umbani, futhi itheminali ephansi eyisivikelo kufanele ibe kude ngamamitha angu-20 ukusuka endaweni yokuvikela umbani. Vimbela ukuhlasela okungase kube khona phansi.
Isifinyezo sokucatshangelwa kwesisekelo se-LED:
1. Ukunikezwa kukagesi ngakunye kufanele kumiswe kutheminali ephansi futhi kukhiywe.
2. Ukumelana okuphansi akufanele kube kukhulu kuno-4Ω.
3. Intambo yaphansi kufanele ibe intambo ekhethekile, futhi inqatshelwe ngokuphelele ukuxhuma nentambo engathathi hlangothi.
4. Ayikho i-air circuit breaker noma i-fuse ezofakwa ocingweni lwaphansi.
5. Intambo yaphansi kanye netheminali yaphansi kufanele kube ngaphezu kwama-20 kude nendawo yokuvikela umbani.
Kwenqatshelwe ngokuphelele ukuthi ezinye izinto zokusebenza zisebenzise isisekelo esivikelayo esikhundleni sikaziro ovikelayo, okuholela ekuxhumekeni okuxubile kwesisekelo esivikelayo kanye neziro ezivikelayo. Lapho ukufakwa kwe-insulation yensiza evikelayo yokuvikela konakalisiwe futhi umugqa wesigaba uthinta igobolondo, umugqa ongathathi hlangothi uzoba ne-voltage phansi, ukuze kukhiqizwe i-voltage eyingozi kugobolondo ledivayisi yokuvikela umhlabathi.
Ngakho-ke, emgqeni onikwe amandla ibhasi elifanayo, isisekelo sokuzivikela kanye nokuxhumeka kwe-zero okuvikelayo akukwazi ukuxubana, okungukuthi, ingxenye eyodwa yemishini kagesi ayikwazi ukuxhunywa ku-zero futhi enye ingxenye yemishini kagesi isekelwe. Ngokuvamile, amapayipi amakhulu axhunywe ekuvikelweni okuyiziro, ngakho-ke izinto zikagesi ezisebenzisa amapayipi amakhulu kufanele zixhunywe ekuvikelweni okuyiziro.
Isikhathi sokuthumela: Jul-11-2022
