Zvitatu zvakajairwa kutadza kwemarambi echiratidzo che LED uye mhinduro

Dzimwe shamwari dzinobvunza zvikonzero zvakajairika uye nzira dzekurapa dze LED masaini mwenje inopenya, uye vamwe vanhu vanoda kubvunza chikonzero nei mwenje we LED usingavheneke. Chii chiri kuitika? Muchokwadi, kune matatu akajairwa kukundikana uye mhinduro dzechiratidzo chemwenje.

Zvitatu zvakajairwa kutadza kwemarambi e LED uye mhinduro:

Mhosva inowanzoitika ndeye rectifier kukundikana. Enda kulight City wotenga imwe woitsiva. Iyo yese inotungamira haiwanzo kukuvara.

Piri. Chiratidzo che LED chinopenya zvikonzero:

1. Mabheji emwenje uye akatungamira dhiraivha simba haaenderane, iyo yakajairwa imwe chete 1W mwenje mabheji bere: 280-300 ma ikozvino uye: 3.0-3.4V voltage, kana mwenje chip isina simba rakakwana, ichaita kuti mwenje sosi iite stasming. chiitiko, kana ikozvino yakakura kwazvo, mabheji emwenje haazokwanisi kumira nekuchinja. Muzviitiko zvakanyanya, waya dzegoridhe kana dzemhangura dziri mukati mebeads dzinogona kutsva, zvichiita kuti mabhedhi atadze kushanda.

2. Iyo dhiraivha yemagetsi inogona kukuvadzwa, chero bedzi iwe uchiitsiva neimwe yakanaka dhiraivha magetsi, haizobwairi.

3. Kana mutyairi ane basa rekudzivirira kwekushisa kwepamusoro, kupisa kwekushisa kwechiedza che LED mwenje hachikwanisi kusangana nezvinodiwa, uye kudzivirirwa kwepamusoro kwemutyairi kuchapenya painotanga kushanda. Semuenzaniso, iyo 20 w projection rambi imba inoshandiswa kuunganidza mwenje we30W haiite basa rakanaka rekutonhodza.

4. Kana marambi ekunze anewo stroboscopic phenomena, zvinoreva kuti marambi akazara nemvura. Nekuda kweizvozvo, kana ichibwaira, haina kuvheneka. Beacon nemutyairi vatyoka. Kana mutyairi akaita basa rakanaka rekudzivirira mvura, bhedhi remwenje rinotyoka uye chitubu chemwenje chinogona kuchinjwa.

Tatu. Kugadziriswa kwe LED chiratidzo mwenje inopenya nzira:

1. Mu-off-line-low-power LED lighting applications, iyo inowanzo simba topology ndiyo yega flyback topology. Iyo Green Dot, 8W off-line LED mutyairi, inosangana nesimba Star solid-state mwenje zviyero. Muchiitiko chekugadzira, nokuti sinusoidal square wave simba rekushandura yeflyback regulator haipe simba rinogara riri rekutanga, iyo inoshanduka-yega-powered circuit inogona kushandura uye kukonzera chiedza kupenya. Kuti udzivise dambudziko iri, zvinodikanwa kuita yekutanga off-set discharge muhafu yega yega kutenderera. Naizvozvo, zvinodikanwa kuti usarudze zvakanaka capacitance uye kupikisa kukosha kwemarambi echiratidzo che LED anoumba dunhu.

2. Kazhinji ziso remunhu rinokwanisa kuona kupenya kwechiedza pafrequency ye 70 Hz, asi pamusoro payo haigoni. Naizvozvo, mune inotungamirwa mwenje maapplication, kana iyo pulse chiratidzo ine yakaderera frequency chikamu ine frequency pazasi 70 Hz, ziso remunhu rinonzwa kupenya. Ehezve, pane zvakawanda zvinhu zvinogona kuita kuti mwenje ye LED ivheneke mune imwe application.

3. Mafirita eEmi anodiwa kunyangwe mumadhiraivha anotungamira anopa simba rakanaka rekugadzirisa uye kutsigira kudzima kwematatu-terminal bi-directional SCR switch. Iyo yenguva pfupi yazvino inokonzereswa nedanho reiyo triterminal bidirectional SCR switch inonakidza iyo yakasikwa resonance ye inductors uye capacitors mune emi sefa.

Kana iyo resonance hunhu ikaita kuti iyo yekupinda ikozvino iderere pane yekubata ikozvino yetatu-terminal bi-directional SCR switch element, matatu-terminal bi-directional SCR switch element inodzimwa. Mushure mekunonoka kupfupi, iyo matatu-terminal bidirectional SCR switching element inowanzo batidzwa zvakare kuti inakidze iwoyo resonance. Iyi nhevedzano yezviitiko inogona kudzokororwa kakawanda mukati mehafu kutenderera kweiyo INPUT simba waveform yeiyo LED semaphore, zvichikonzera kuoneka kwe LED kupenya.