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Ib Daim Ntawv Qhia Me Me ntawm Triacs - Efficacious AC Lub Hwj Chim Tswj Ntaus
Hais txog Triacs Electronic Parts thiab Nws Cov Khoom Muag:
Lub triacs yog ib qho khoom siv AC conduction, thiab tej zaum yuav xav tias yog ob qho tib si antiparallel thyristors monolithically integrated mus rau tib silicon nti. TRIAC, los ntawm Triode rau Hloov Tam Sim No, yog lub npe lag luam dav dav rau cov khoom siv hluav taws xob uas tuaj yeem ua tam sim no nyob rau hauv ob qho kev taw qhia thaum nws tshwm sim, thiab raug hu ua bidirectional triode thyristor lossis ob sab triode thyristor. TRIACs yog ib feem ntawm tsev neeg thyristor thiab muaj kev sib raug zoo nrog silicon-tswj rectifiers (SCR), tsis zoo li SCRs, uas yog cov khoom siv unidirectional (tuaj yeem ua tam sim no hauv ib qho kev taw qhia), TRIACs yog bidirectional thiab yog li tam sim no tuaj yeem ntws mus rau ob qho tib si. Lwm qhov sib txawv ntawm SCRs yog tias TRIAC tam sim no tuaj yeem siv tau los ntawm qhov zoo lossis qhov tsis zoo tam sim no siv rau nws lub rooj vag electrode, qhov SCRs tuaj yeem tshwm sim los ntawm tam sim no mus rau hauv lub rooj vag. Txhawm rau tsim kom muaj qhov tshwm sim tam sim no, qhov zoo lossis qhov tsis zoo yuav tsum tau siv rau lub rooj vag nrog rau MT1 davhlau ya nyob twg (lwm yam hu ua A1). Thaum tshwm sim, lub cuab yeej txuas ntxiv ua haujlwm kom txog thaum tam sim no poob qis dua ib qho chaw pib hu ua qhov tuav tam sim no.
Lub directionality ua rau TRIACs yooj yim heev keyboards rau alternating tam sim no circuits, kuj tso cai rau lawv los tswj lub zog loj heev ntws nrog zeb ampere-scale rooj vag tam sim no.
Kev siv lub ntsuas pulse ntawm lub kaum sab xis tswj nyob rau hauv lub voj voog AC tso cai rau kev tswj cov feem pua ntawm tam sim no uas ntws los ntawm TRIAC mus rau qhov load (theem tswj), uas feem ntau siv, piv txwv li, hauv kev tswj qhov ceev ntawm lub zog qis induction. motors, nyob rau hauv dimming teeb, thiab tswj AC cua sov resistors. Obviously tus triacs kuj tuaj yeem tshwm sim los ntawm kev tshaj qhov tawg dhau voltage. Qhov no tsis yog ib txwm ua haujlwm hauv kev ua haujlwm triacs. Qhov tawg dhau voltage feem ntau suav hais tias yog kev txwv tsim. Ib qho kev txwv loj, ib yam li SCR, yog dV / dt, uas yog tus nqi nce ntawm qhov hluav taws xob nrog rau lub sijhawm. Lub triac tuaj yeem hloov mus rau hauv kev coj ua los ntawm dV / dt loj. Cov ntawv thov yog nyob rau hauv theem tswj, inverter tsim, AC hloov, hloov relay. Thaum siv nrog inductive loads xws li hluav taws xob kiv cua, yuav tsum tau saib xyuas kom paub tseeb tias TRIAC yuav tua kom raug thaum kawg ntawm txhua ib nrab-lub voj voog ntawm AC fais fab. Qhov tseeb, TRIACs tuaj yeem nkag siab zoo rau qhov tseem ceeb ntawm dv / dt ntawm MT1 thiab MT2, yog li kev hloov pauv ntawm qhov tam sim no thiab qhov hluav taws xob (xws li nyob rau hauv cov ntaub ntawv ntawm inductive load) ua rau tam sim no voltage theem uas tuaj yeem ua rau lub cuab yeej tig rau hauv. yam tsis xav tau.
Cov kev ntsuam xyuas thiab cov yam ntxwv ntawm triacs zoo ib yam li cov thyristor, tshwj tsis yog tias lub triac tsis muaj qhov rov qab qhov ntsuas hluav taws xob (ib qho hluav taws xob rov qab hauv ib lub quadrant yog qhov hluav taws xob rau pem hauv ntej nyob rau hauv qhov opposite quadrant). Txawm li cas los xij, ib tus yam ntxwv yuav tsum tau saib xyuas tshwj xeeb thaum xaiv triacs; tus nqi ntawm re-applied voltage uas lub triacs yuav withstand tsis uncontrolled tig-on. Yog hais tias ib tug triac raug muab tua los ntawm tsuas yog ceev ceev reversing lub mov voltage, qhov rov qab tam sim no nyob rau hauv lub ntaus ntawv yuav tsuas hloov ton nyob rau hauv lub opposite kev taw qhia. Txhawm rau lav qhov txo qis ntawm qhov tam sim no hauv qab nws tus nqi tuav, cov khoom siv hluav taws xob yuav tsum raug txo kom xoom thiab tuav rau lub sijhawm txaus kom tso cai rau rov ua dua ntawm cov nqi khaws cia hauv lub cuab yeej.