Cia peb nkag siab cov ntsiab cai ntawm TRIAC. TRIAC yog qhov tseem ceeb ntawm bidirectional thyristor, uas yog tsim los ntawm cov thyristors zoo tib yam thiab muaj peb lub electrodes: lub ntsiab electrode T1, lub ntsiab electrode T2, thiab lub rooj vag G. Los ntawm kev tswj lub rooj vag voltage, bi-directional conduction thiab txiav tawm tam sim no ntawm lub ntsiab electrodes tuaj yeem ua tiav. Cov yam ntxwv no ua rau TRIAC hloov ob qhov rov qab polarity parallel thyristors, thiab tuaj yeem tswj tau AC lub zog nrog tsuas yog ib qho kev cuam tshuam, ua rau nws zoo tagnrho AC hloov khoom siv tam sim no.
Theem dimming tshuab tswj qhov nruab nrab lub zog ntawm lub load los ntawm kev hloov lub kaum sab xis ntawm lub alternating tam sim no, yog li ua tiav qhov kev hloov ntawm lub teeb ci. Hauv qhov dimming system, los ntawm kev hloov lub kaum sab xis ntawm AC, lub dimmer tuaj yeem txo cov hluav taws xob hluav taws xob tau txais los ntawm kev thauj khoom hauv txhua lub voj voog AC, yog li paub txog kev hloov ntawm lub teeb ci. Txoj kev dimming no muaj cov yam ntxwv ntawm kev sib tw, tsis tu ncua, thiab tsis hloov pauv, thiab siv dav hauv kev tswj teeb pom kev zoo hauv qhov chaw xws li tsev, chaw ua haujlwm, thiab khw muag khoom.
Tom ntej no, peb yuav txheeb xyuas daim ntawv thov ntawm TRIAC hauv theem dimming. Hauv kev siv cov tswv yim, TRIAC dimmer (forward phase control dimmer) yog ib qho kev siv cov theem dimming. Nws txoj haujlwm ua haujlwm yog txuas R1, R2, thiab C1 ua ke hauv RC Circuit Court. Los ntawm kev tswj qhov voltage nce tus nqi ntawm C1, nws kov qhov taw tes taw tes voltage ntawm AC diode (Diac), yog li ua tiav kev tswj ntawm TRIAC. Thaum qhov kev tiv thaiv ntawm potentiometer siab dua, lub sijhawm pib ncua sij hawm ntev dua, thiab qhov nruab nrab lub zog hluav taws xob tau txais los ntawm kev thauj khoom raug txo, ua rau txo qis hauv lub teeb ci. Yog li ntawd, los ntawm kev kho qhov chaw ntawm lub potentiometer, kev hloov kho tas li ntawm lub teeb ci tuaj yeem ua tiav.
Txawm li cas los xij, txawm hais tias TRIAC ua lub luag haujlwm tseem ceeb hauv theem dimming, ob qho tib si tsis zoo ib yam. Ua ntej, los ntawm kev txhais, TRIAC yog lub tshuab hluav taws xob hluav taws xob, thaum theem dimming yog lub teeb pom kev zoo tswj kev siv tshuab. Secondly, nyob rau hauv cov nqe lus ntawm daim ntawv thov, TRIAC tsis tau tsuas yog siv rau theem dimming, tab sis kuj rau lwm yam xwm txheej uas yuav tsum tau AC tswj, xws li lub cev muaj zog tswj, cua sov tswj, thiab lwm yam. Theem dimming yog tsuas yog siv nyob rau hauv lub teeb pom kev zoo kom tau raws li lub teeb pom kev zoo. kev xav tau ntawm cov sijhawm sib txawv los ntawm kev kho qhov ci ntawm lub teeb.
Tsis tas li ntawd, los ntawm txoj kev xav ntawm kev ua haujlwm, kev ua haujlwm thiab kev txiav tawm ntawm TRIAC tau ua tiav los ntawm kev tswj lub rooj vag voltage, thaum theem dimming kho qhov nruab nrab lub zog ntawm lub load los ntawm kev hloov lub kaum sab xis ntawm lub alternating tam sim no. Yog li ntawd, txawm hais tias TRIAC yog ib qho ntawm cov khoom tseem ceeb kom ua tiav txoj haujlwm dimming hauv theem dimming systems, tseem muaj qhov sib txawv ntawm cov hauv paus ntsiab lus ntawm ob.
TRIAC thiab theem dimming txhua lub luag haujlwm tseem ceeb hauv kev siv hluav taws xob hluav taws xob thiab kev tswj teeb pom kev zoo. Txawm hais tias muaj qhov sib xws ntawm qee qhov ntawm ob, muaj qhov sib txawv tseem ceeb hauv lawv cov ntsiab lus, qhov kev siv, thiab cov qauv kev ua haujlwm. Hauv kev siv tswv yim, peb yuav tsum xaiv cov cuab yeej tsim nyog thiab thev naus laus zis raws li cov kev xav tau tshwj xeeb kom ua tiav cov txiaj ntsig zoo tshaj plaws.
