Zai na TRIAC?
Takaitaccen TRIAC
TRIAC yana nufin karamin hanyar tashin AC da take maida waɗanda uku da zai iya gudanar da cashi a duk abubuwa, tare da cikin sauyin AC.
TRIAC yana nufin karamin hanyar tashin AC da take maida waɗanda uku da zai iya gudanar da cashi a duk abubuwa, ba kamar wasu silicon controlled rectifiers. Zai iya gudanar da cashi idan alama ta gate ya kasance musamman ko mutanen, wanda yakeke shi daidai da sauyin AC.
Wannan yana nufin wurin semiconductori da uku masu layi uku da fadada biyu, wanda ke kontrola tashin AC. An samun TRIAC da maximum rating-ko na 16 kw a sashe.
Rabtaba yana nuna alama na TRIAC, wanda ke da masu terminali MT1 da MT2 suna fi tsawo da terminali gate.
Koyar da TRIAC
Duk da an samun SCRs biyu a tsawon inverse parallel da terminali gate mai girma. Terminali gate yana haɗa da N da P, wanda yake iya amfani da alama ta gate bata kan abubuwan da suka haɗa. Ba kamar wasu wurare, babu anoda da anoda, amma yana aiki a matsayin biyu da terminali uku: main terminal 1 (MT1), main terminal 2 (MT2), da gate terminal (G).
Rabtaba yana nuna koyar da TRIAC. Ana da terminali biyu na main MT1 da MT2, da terminalin gate.
Aiki da TRIAC
Za a iya faɗinsa TRIAC tare da magana da voltage da take da ita game da break over voltage. Ko kuma za a iya faɗinsa tare da pulse da 35 microseconds. Idan voltage ya kai da break over voltage, za a amfani da gate triggering. Ana da tsarin aiki biyu, wadannan ne-
Idan MT2 da Gate suna da Positive don MT1 Idan wannan yana faru, zai iya gudanar da cashi a hanyar P1-N1-P2-N2. A nan, P1-N1 da P2-N2 suna cikin bias forward amma N1-P2 yana cikin bias reverse. Ana ce TRIAC yana aiki a cikin bias positive. Alama ta gate da take da positive don MT1 yana cikin bias forward P2-N2 da zai iya faru breakdown.
Idan MT2 yana da Positive amma Gate yana da Negative don MT1 Zai iya gudanar da cashi a hanyar P1-N1-P2-N2. Amma P2-N3 yana cikin bias forward da zai iya injekta carriers a P2 a TRIAC.
Idan MT2 da Gate suna da Negative don MT1 Zai iya gudanar da cashi a hanyar P2-N1-P1-N4. Biyu masu junction P2-N1 da P1-N4 suna cikin bias forward amma junction N1-P1 yana cikin bias reverse. Ana ce TRIAC yana aiki a cikin bias negative.
Idan MT2 yana da Negative amma Gate yana da Positive don MT1 P2-N2 yana cikin bias forward a wannan lokaci. Zai iya injekta carriers saboda haka TRIAC zai faɗa. Wannan tsari na aiki yana da batu wanda ba zai iya amfani da shi a cikin circuits da di/dt mai yawa. Sensitivity of triggering a mode 2 da 3 yana da yawa da kuma idan marginal triggering capability ya danganta, ya kamata a amfani da negative gate pulses. Triggering a mode 1 yana da sensitivity da yawa da mode 2 da 3.
Muhimmanci na TRIAC
Muhimmanci na TRIAC yana dace da SCR amma yana da muhimmanci zuwa positive da negative voltages. Aikin yana iya bayyana hakan:
First Quadrant Operation of TRIAC
Voltage a terminal MT2 yana da positive don terminal MT1 da gate voltage yana da positive don terminal da ta ɓaya.
Second Quadrant Operation of TRIAC
Voltage a terminal 2 yana da positive don terminal 1 da gate voltage yana da negative don terminal 1.
Third Quadrant Operation of TRIAC
Voltage a terminal 1 yana da positive don terminal 2 da gate voltage yana da negative.
Fourth Quadrant Operation of TRIAC
Voltage a terminal 2 yana da negative don terminal 1 da gate voltage yana da positive.
Idan TRIAC yana faɗa, zai iya gudanar da cashi mai yawa, wanda zai iya janar da damu. Don haka, ya kamata a amfani da resistor mai yawa don limitar da cashi. Alama ta gate mai ma'ana zai iya kontrola firing angle na device. Circuits like diac zai iya amfani don haka, da gate pulses tare da 35 microseconds.
Abubuwa na TRIAC
Za a iya faɗinsa tare da polarity da take da positive ko negative ta gate pulses.
Yana buƙatar heat sink mai yawa, amma don SCR, ana buƙatar heat sinks biyu da take da kyau.
Yana buƙatar fuse mai yawa don protection.
Safe breakdown a duk abubuwa yana da kyau, amma don SCR, ana buƙatar protection tare da diode mai yawa.
Batutu na TRIAC
Ba su da inganci da SCR ba.
Su da (dv/dt) rating mai kadan da SCR.
Ratings mai kadan da SCR su da su.
Yana buƙatar da jin daidai ga circuit ta triggering saboda zai iya faɗa a duk abubuwa.
Amfani da TRIAC
Ana amfani da su a cikin control circuits.
Ana amfani da su a High power lamp switching.
Ana amfani da su a AC power control.
