Peb yuav tsum nkag siab txog cov qauv thiab cov yam ntxwv ntawm TRIAC. TRIAC, tseem hu ua peb lub davhlau ya nyob twg bidirectional AC hloov, yog cov khoom siv hluav taws xob semiconductor nrog lub peev xwm ua haujlwm bidirectional. Nws cov qauv tseem ceeb suav nrog ob lub ntsiab electrodes (T1 thiab T2) thiab tswj electrode ( rooj vag G). Tus yam ntxwv ntawm TRIAC yog tias thaum lub rooj vag tau txais cov teeb liab txaus, qhov tam sim no ntawm cov electrodes tseem ceeb tuaj yeem ua tiav bidirectional conduction, yog li ua tiav kev tswj hwm ntawm AC lub zog.
Tom ntej no, peb yuav txheeb xyuas txoj hauv kev ua haujlwm ntawm tus tsav tsheb TRIAC. Tus tsav tsheb TRIAC feem ntau suav nrog lub tshuab hluav taws xob, RC Circuit Court, TRIAC, thiab thauj khoom. Ntawm lawv, lub trigger Circuit Court yog lub luag haujlwm rau kev tsim cov teeb liab teeb liab, RC Circuit Court yog siv los tswj lub sijhawm ncua sij hawm ntawm lub teeb liab, TRIAC yog lub hauv paus tseem ceeb rau kev tswj xyuas tam sim no, thiab cov khoom siv hluav taws xob tswj tau.
Thaum tus neeg tsav tsheb tau txais lub teeb liab dimming lossis lwm yam teeb liab tswj, qhov cuam tshuam hluav taws xob pib ua haujlwm. Cov kab hluav taws xob feem ntau suav nrog AC diode (Diac) thiab cov resistor. Thaum lub sij hawm txhua lub voj voog ntawm kev hloov tam sim no, thaum qhov hluav taws xob mus txog qhov hluav taws xob ntawm Diag, Diag ua thiab muab lub teeb liab ua rau lub rooj vag ntawm TRIAC. Cov teeb liab teeb liab no ua rau TRIAC ua, tso cai rau tam sim no dhau los ntawm kev thauj khoom.
RC circuit plays lub luag haujlwm tseem ceeb hauv TRIAC tsav tsheb. Nws muaj cov resistor R thiab capacitor C, siv los tswj lub sij hawm ncua sij hawm ntawm lub teeb liab. Tshwj xeeb, RC Circuit Court txiav txim siab tus nqi ntawm qhov ua rau qhov hluav taws xob ntawm Diac nce. Thaum tus nqi tsis kam ntawm potentiometer hloov, lub sijhawm them ntawm RC Circuit Court kuj yuav hloov raws li, uas yuav cuam tshuam rau lub sijhawm ua haujlwm ntawm DIC. Nyob rau hauv txoj kev no, los ntawm kev kho lub potentiometer, peb tuaj yeem hloov lub sijhawm ua haujlwm ntawm TRIAC hauv txhua lub voj voog AC, yog li ua tiav kev tswj xyuas zoo ntawm cov khoom thauj tam sim no.
Thaum TRIAC ua, tam sim no ntws los ntawm kev thauj khoom, tsav cov khoom siv hluav taws xob ua haujlwm. Vim yog TRIAC's bidirectional conductivity, tam sim no tuaj yeem hla dhau ntawm cov load tsis hais qhov zoo lossis qhov tsis zoo ib nrab ntawm cov hloov tam sim no. Qhov no ua rau tus tsav tsheb TRIAC hloov tau yooj yim thiab ua haujlwm tau zoo hauv AC lub zog tswj.
Nws yog tsim nyog sau cia tias tus tsav tsheb TRIAC yuav tsum xav txog qhov sib txuam ntawm qhov hluav taws xob thiab tam sim no thaum nws ua haujlwm. Txhawm rau kom muaj kev ruaj ntseg ntawm kev tsav tsheb, peb yuav tsum xaiv qhov tsim nyog TRIAC qauv thiab cov kev ntsuas kom tau raws li qhov voltage thiab tam sim no cov kev xav tau ntawm cov load. Tsis tas li ntawd, txhawm rau txhim kho kev ntseeg siab thiab kev nyab xeeb ntawm kev tsav tsheb, kev tiv thaiv tsim nyog yuav tsum tau ua, xws li kev tiv thaiv overcurrent, tiv thaiv overvoltage, thiab lwm yam.
Thaum kawg, cia peb xaus qhov zoo ntawm txoj haujlwm ua haujlwm ntawm TRIAC cov tsav tsheb. Ua ntej, vim TRIAC's bidirectional conductivity, tus neeg tsav tsheb muaj peev xwm ua tiav kev tswj hwm ntawm AC fais fab. Thib ob, los ntawm kev kho lub potentiometer, peb tuaj yeem hloov kho lub sijhawm ua haujlwm ntawm TRIAC, yog li ua tiav kev hloov kho tas li ntawm cov khoom thauj tam sim no. Tsis tas li ntawd, TRIAC cov tsav tsheb kuj muaj qhov zoo xws li cov lus teb ceev ceev, kev ua haujlwm siab, thiab tus nqi qis, ua rau lawv siv dav hauv kev siv hluav taws xob hluav taws xob.
