Labarai
0102030405
Hanyoyi guda biyar na manyan dimming na fitilun LED
2024-07-12 17:30:02
Ƙa'idar hasken haske na LED ya bambanta da na al'adun gargajiya. Ya dogara da mahadar PN don fitar da haske. Maɓuɓɓugan hasken LED masu ƙarfi iri ɗaya suna amfani da kwakwalwan kwamfuta daban-daban kuma suna da sigogi daban-daban na halin yanzu da ƙarfin lantarki. Sabili da haka, tsarin na'urorin wayar su na ciki da rarraba da'ira su ma sun bambanta, wanda ya haifar da masana'antun daban-daban. Mabuɗin haske daban-daban suna da buƙatu daban-daban don dimming direbobi. Bayan ya faɗi haka, editan zai kai ku fahimtar hanyoyin sarrafa dimming LED guda biyar.
1. 1-10V dimming: Akwai da'irori masu zaman kansu guda biyu a cikin na'urar dimming 1-10V. Ɗayan na'urar lantarki ce ta yau da kullun, ana amfani da ita don kunnawa ko kashe wutar lantarki zuwa kayan wuta, ɗayan kuma ƙaramin ƙarfin lantarki ne, wanda ke ba da ma'anar Voltage, yana faɗar matakin rage ƙarancin wutar lantarki. 0-10V mai sarrafa dimming yawanci ana amfani dashi don rage sarrafa fitilun kyalli. Yanzu, saboda ana ƙara samar da wutar lantarki akai-akai zuwa ƙirar direba na LED kuma akwai keɓaɓɓiyar kewayawa mai sarrafawa, don haka dimmer 0 -10V kuma na iya tallafawa babban adadin hasken LED. Koyaya, gazawar aikace-aikacen kuma a bayyane suke. Siginonin sarrafa ƙarancin wutar lantarki suna buƙatar ƙarin saitin layi, wanda ke haɓaka buƙatun gini sosai.
2. DMX512 dimming: The DMX512 yarjejeniya da aka farko ɓullo da ta USITT (United States Institute of Theatre Technology) a cikin wani misali dijital dubawa daga na'ura wasan bidiyo don sarrafa dimmer. DMX512 ya wuce tsarin analog, amma ba zai iya maye gurbin tsarin analog gaba ɗaya ba. Sauki na DMX512, dogaro (idan an shigar da shi kuma an yi amfani da shi daidai), da sassauci sun sa ya zama ƙa'idar zaɓi idan kuɗi ya ba da izini. A aikace-aikace masu amfani, hanyar sarrafawa na DMX512 shine gabaɗaya don tsara wutar lantarki da mai sarrafawa tare. Mai sarrafa DMX512 yana sarrafa layukan 8 zuwa 24 kuma kai tsaye yana tafiyar da layukan RBG na fitilun LED. Koyaya, a cikin ayyukan samar da hasken wuta, saboda raunin layukan DC, ana buƙatar shigar da na'ura a kusan mita 12, kuma motar bas ɗin tana cikin yanayin layi ɗaya. , sabili da haka, mai sarrafawa yana da yawan wayoyi, kuma a yawancin lokuta ba shi yiwuwa a gina shi.
3. Triac dimming: Triac dimming an yi amfani da shi a cikin fitulun wuta da fitulun ceton makamashi na dogon lokaci. Hakanan ita ce hanyar dimming da aka fi amfani da ita don dimming LED. Dimming SCR wani nau'in dimming ne na jiki. Fara daga AC lokaci 0, shigar da ƙarfin lantarki yana tsinkewa cikin sabbin raƙuman ruwa. Babu shigarwar wutar lantarki har sai an kunna SCR. Ka'idar aiki ita ce ta samar da nau'in igiyar wutar lantarki ta tangential bayan yanke tsarin igiyar wutar lantarki ta hanyar kusurwar gudanarwa. Yin amfani da ka'idar tangential na iya rage tasiri mai tasiri na ƙarfin wutar lantarki, ta haka ne rage ƙarfin nauyin nauyi (nauyi masu juriya). Triac dimmers suna da fa'idodin daidaitattun daidaitawa, ingantaccen inganci, ƙaramin girman, nauyi mai sauƙi, da sauƙin sarrafa nesa, kuma suna mamaye kasuwa.
4. PWM dimming: Pulse width modulation (PWM-Pulse Width Modulation) fasaha yana gane ikon sarrafa da'irori na analog ta hanyar kunna kashe wutar lantarki na inverter. Fasahar fitarwa na ƙirar ƙirar ƙirar ƙirar ƙira masana'anta ne na ƙimar ƙimar ƙimar daidai da ake amfani da ita don maye gurbin raƙuman da ake so.
Ɗaukar sine wave a matsayin misali, wato, yin daidai da ƙarfin lantarki na wannan jerin nau'in bugun jini ya zama sine, da kuma sanya fitar da fitarwa a matsayin mai santsi kamar yadda zai yiwu kuma tare da ƙarancin tsari na jituwa. Dangane da buƙatu daban-daban, ana iya daidaita faɗin kowane bugun jini daidai da canjin ƙarfin fitarwa ko mitar fitarwa, ta haka ne ke sarrafa da'irar analog. A taƙaice, PWM hanya ce ta lambobi ta hanyar lambobi na matakan siginar analog.
Ta hanyar amfani da ƙididdiga masu ƙima, ana daidaita rabon zama na raƙuman murabba'in don ɓoye matakin takamaiman siginar analog. Siginar PWM har yanzu dijital ce saboda a kowane lokaci, cikakken ƙarfin DC ko dai yana nan gaba ɗaya ko kuma ba ya nan. Ana amfani da wutar lantarki ko tushen halin yanzu zuwa kayan da aka kwaikwayi a cikin maimaitawar juzu'i na kunnawa ko kashewa. Lokacin da wutar lantarki ke kunne, shi ne lokacin da aka ƙara wutar lantarki ta DC a cikin kaya, kuma idan ya kashe, shine lokacin da aka cire wutar lantarki.
Idan mitar haske da duhu ya wuce 100Hz, abin da idon ɗan adam ke gani shine matsakaicin haske, ba hasken LED ba. PWM yana daidaita haske ta daidaita girman lokacin haske da duhu. A cikin sake zagayowar PWM, saboda hasken da idon ɗan adam ya gane don flickers haske fiye da 100Hz tsari ne na tarawa, wato, lokacin haske yana lissafin mafi girman rabo na duka zagayen. Girman shi, mafi girman haske ga idon ɗan adam.
5. DALI dimming: Ma'aunin DALI ya ayyana hanyar sadarwa ta DALI, gami da matsakaicin raka'a 64 (ana iya yin magana da kansu), ƙungiyoyi 16 da fage 16. Raka'o'in hasken wuta daban-daban akan bas ɗin DALI ana iya haɗa su cikin sassauƙa don cimma daidaito da sarrafa fage daban-daban. A aikace aikace, mai sarrafa DALI na yau da kullun yana sarrafa fitilu 40 zuwa 50, waɗanda za a iya raba su zuwa ƙungiyoyi 16, kuma suna iya aiwatar da wasu ayyuka a layi daya. A cikin hanyar sadarwar DALI, ana iya sarrafa umarnin sarrafawa 30 zuwa 40 a sakan daya. Wannan yana nufin cewa mai sarrafawa yana buƙatar sarrafa umarnin dimming 2 a sakan daya don kowace ƙungiyar haske.