Za dalaivala wa LED

Chidziwitso cha driver wa LED

Ma LED ndi zida za semiconductor zomwe zimakhala ndi mawonekedwe osatentha.Choncho, iyenera kukhazikika ndikutetezedwa panthawi yogwiritsira ntchito, zomwe zimatsogolera ku lingaliro la dalaivala.Zipangizo za LED zili ndi zofunikira pafupifupi zovuta pakuyendetsa galimoto.Mosiyana ndi mababu wamba a incandescent, ma LED amatha kulumikizidwa mwachindunji ndi magetsi a 220V AC.

Ntchito ya driver wa LED

Malinga ndi malamulo amagetsi a gridi yamagetsi ndi zomwe zimafunikira pamagetsi oyendetsa madalaivala a LED, mfundo zotsatirazi ziyenera kuganiziridwa posankha ndi kupanga magetsi oyendetsa madalaivala a LED:

Kudalirika kwakukulu: makamaka ngati woyendetsa magetsi a msewu wa LED.Kusamalira kumakhala kovuta komanso kokwera mtengo m'madera okwera.

Kuchita bwino kwambiri: Kuwala kowala kwa ma LED kumachepa ndi kutentha kowonjezereka, kotero kuti kutentha kumakhala kofunika kwambiri, makamaka pamene magetsi aikidwa mu babu.LED ndi chinthu chopulumutsa mphamvu chokhala ndi mphamvu zoyendetsa galimoto, kugwiritsa ntchito mphamvu zochepa komanso kutentha kochepa mu nyali, zomwe zimathandiza kuchepetsa kutentha kwa nyali ndikuchedwetsa kuyatsa kwa kuwala kwa LED.

Mphamvu yayikulu: Mphamvu yamagetsi ndiyofunikira pa gridi yamagetsi pa katundu.Nthawi zambiri, palibe zizindikiro zovomerezeka pazida zamagetsi zomwe zili pansi pa 70 watts.Ngakhale kuti mphamvu ya chipangizo chimodzi chochepa kwambiri ndi yotsika kwambiri, imakhala ndi mphamvu zochepa pa gridi yamagetsi.Komabe, ngati magetsi amayatsidwa usiku, katundu wofananawo amakhala wokhazikika kwambiri, zomwe zingayambitse zolemetsa zazikulu pagululi.Akuti kwa dalaivala wa LED wa 30 mpaka 40 watts, pakhoza kukhala zofunikira zina za index factor posachedwapa.

LED driver mfundo

Mzere wa ubale pakati pa kutsika kwa magetsi a kutsogolo (VF) ndi kutsogolo kwamakono (IF).Zitha kuwonedwa kuchokera pamapindikira kuti mphamvu yakutsogolo ikadutsa malire ena (pafupifupi 2V) (yomwe nthawi zambiri imatchedwa on-voltage), zitha kuganiziridwa kuti IF ndi VF ndizofanana.Onani tebulo ili m'munsimu la mawonekedwe amagetsi a ma LED owala kwambiri.Zitha kuwoneka kuchokera patebulo kuti IF yapamwamba kwambiri ya LED yowala kwambiri imatha kufika 1A, pomwe VF nthawi zambiri imakhala 2 mpaka 4V.

Popeza mawonekedwe a kuwala kwa LED nthawi zambiri amafotokozedwa ngati ntchito yapano m'malo mogwiritsa ntchito mphamvu yamagetsi, ndiye kuti, mgwirizano pakati pa luminous flux (φV) ndi IF, kugwiritsa ntchito dalaivala wanthawi zonse kumatha kuwongolera bwino kuwala. .Kuphatikiza apo, kutsika kwamagetsi akutsogolo kwa LED kumakhala ndi mitundu yayikulu (mpaka 1V kapena kupitilira apo).Monga momwe zikuwonekera kuchokera ku VF-IF curve mu chithunzi pamwambapa, kusintha kwakung'ono kwa VF kudzabweretsa kusintha kwakukulu kwa IF, zomwe zimapangitsa kuwala kwakukulu ndi kusintha kwakukulu.

Mphepete mwa ubale pakati pa kutentha kwa LED ndi kuwala kowala (φV).Chithunzi chomwe chili pansipa chikuwonetsa kuti kuwala kowala kumayenderana mosiyanasiyana ndi kutentha.Kuwala kowala pa 85 ° C ndi theka la kuwala kowala pa 25 ° C, ndipo kutulutsa kowala pa 40 ° C ndi 1.8 nthawi za kuwala kowala pa 25 ° C.Kusintha kwa kutentha kumakhalanso ndi zotsatira zina pa kutalika kwa mawonekedwe a LED.Choncho, kutentha kwabwino ndi chitsimikizo chotsimikizira kuti LED imakhalabe yowala nthawi zonse.

Chifukwa chake, kugwiritsa ntchito gwero lamagetsi osasunthika kuyendetsa sikungatsimikizire kugwirizana kwa kuwala kwa LED, ndipo kumakhudza kudalirika, moyo ndi kuchepetsedwa kwa kuwala kwa LED.Chifukwa chake, ma LED owala kwambiri nthawi zambiri amayendetsedwa ndi gwero lanthawi zonse.