ngu-Inthanethi Archive Book Izithombe
Ukubuka kafushane kwama-Triacs - Idivayisi Yokulawula Amandla we-AC Esebenzayo
Mayelana neTracacs Izingxenye Ze-elekthronikhi Nobubanzi Bomkhiqizo Wakhe:
I-triacs yisixhobo se-AC conduction, futhi singacatshangelwa njengama-thyristors amabili we-antiparallel monolithically ahlanganiswe kwi-chip efanayo ye-silicon. I-TRIAC, kusuka ku-Triode for Alternating yamanje, yigama lokuhweba elihlanganisiwe lesakhi se-elekthronikhi elingasebenza lamanje kunoma yiluphi uhlangothi lapho libangwa, futhi libizwa ngokusemthethweni ngokuthi yi-bidirectional triode thyristor noma i-bilodeal triode thyristor. Ama-TRIAC ayingxenye yomndeni we-thyristor futhi ahlobene kakhulu nama-silicon alawulwa kabusha ama-silicon (SCR), ngokungafani nama-SCR, angamadivayisi angahlawulwanga (angasebenza okwamanje ngokuqondisa ngasikhathi sinye), ama-TRIACs ayizinqolobane ngakho-ke okwamanje kungageleza kunoma yiphi indlela. Omunye umehluko ovela kuma-SCRs ukuthi ukugeleza kwamanje kwe-TRIAC kunganikezwa amandla noma okuhle okusetshenziswayo njengamanje kusetshenziselwa i-elektrode yesango, kanti ama-SCR angadalwa kuphela ngokungena esangweni njengamanje. Ukwakha i-triggering yamanje, kufanele kusetshenziswe i-voltage eyakhayo noma engemihle esangweni maqondana ne-MT1 ukuphela (okunye okwaziwa njenge-A1). Uma sekudaliwe, ucingo luyaqhubeka ukuqhuba kuze kube yilapho lamanje liwela ngaphansi komkhawulo othile obizwa ngokuthi okwangoku.
Ukuqondiswa kwemigwaqo kwenza ama-TRIACs afanele kakhulu ukushintshana kwamasekethe amanje, futhi iwavumela ukuba alawule amandla amakhulu kakhulu ngokugeleza kwesango okulinganiselwa kakhulu.
Ukufaka umgodi we-trigger ekhoneni lesigaba elilawuliwe kumjikelezo we-AC kuvumela ukuphathwa kwamaphesenti wamanje okuhamba nge-TRIAC kuya kumthwalo (isigaba sokulawula), esivame ukusetshenziswa, ngokwesibonelo, ukulawula ijubane lokungeniswa kwamandla amancane ama-motors, izibani ezifiphele, nasekulawuleni ama-AC heating assistors. Ngokusobala unxantathu angadalwa nangokweqa ikhefu ngamandla kagesi. Lokhu akuvamisile ukuqashwa ekusebenzeni kwama-triacs. Ukwehla kwamandla kagesi kuvame ukuthathwa njengomkhawulo wokwenza izinto. Omunye umkhawulo omkhulu, njengoba kwenzeka nge-SCR, yi-dV / dt, okuyisilinganiso sokunyuka kwamandla kagesi maqondana nesikhathi. Unxantathu ungashintshelwa ku-conduction nge-dV / dt enkulu. Izicelo ezijwayelekile zikulawulo lwesigaba, idizayini ye-inverter, ukushintshwa kwe-AC, ukuphinda kudluliselwe. Uma kusetshenziswa imithwalo efundisayo efana nabalandeli bakagesi, ukunakekelwa kufanele kuthathwe ukuqinisekisa ukuthi i-TRIAC izocima kahle ekugcineni komjikelezo ngamunye wamandla we-AC. Ngempela, ama-TRIACs angazwela kakhulu kumanani aphezulu we-dv / dt phakathi kwe-MT1 ne-MT2, ngakho-ke ukuguquguquka kwesigaba phakathi kwamanje ne-voltage (njengakwimeko yomthwalo osishukumisayo) kuholela esinyakazweni sevolumu esheshayo esingenza idivaysi ivuleke indlela engafuneki.
Izilinganiso nezici zonxantathu ziyafana nalezo ze-thyristor, ngaphandle kokuthi unxantathu awunazo izilinganiso eziguqukayo zamandla kagesi (i-voltage ehle ku-quadrant eyodwa yivolumu yangaphambili ku-quadrant ephambene). Kodwa-ke, isimilo esisodwa sidinga ukunakwa okukhethekile lapho ukhetha ama-triacs; isilinganiso samandla kagesi asetshenziswe kabusha ama-triacs azobekezelela ngaphandle kokuvula okungaphendulwanga. Uma unxantathu icishiwe ngokubuyisa ngokushesha amandla kagesi, okwakhona kungaleso sikhathi kudivayisi kungamane kushintshe ithoni kwelinye icala. Ukuqinisekisa ukuncishiswa kwamanje ngaphansi kwenani lokuphatha, amandla kagesi wokuhlinzekela kufanele ancishiswe abe ngu-zero futhi aphethwe lapho isikhathi esanele sokuvumela ukuphinda kwenziwe noma iyiphi imali egciniwe kudivayisi.