DIAC & TRIAC CHARACTERSTICS

Presented by N.MANIKANTA BABU(13MPE0074)DIAC & TRIAC CHARACTERSTICSThe DIAC is a combination of two diodes.Diodes is unidirectional devices, conduct current only in one direction.DIAC is a bidirectional device, conducts currrent in both directions

DIAC CHARACTERSTICSDIACDIODE FOR ALTERNATING CURRENTSYMBOLBASIC STRUCTURE

In first quadrant, T1 is positive with respect to T2In third quadrant,T2 is positive with respect to T1V-I CHARACTERSTICS

T1T2SIMULINK CIRCUIT

OUTPUT WAVE FORM

The TRIAC is a combination of two thyristor.Thyristor is unidirectional devices, conduct current only in one direction.TRIAC is a bidirectional device, conducts current in both directionsTRIAC CHARACTERSTICSTRIACTRIODE FOR ALTERNATING CURRENTBASIC STRUCTURE SYMBOL

Internal Gate Terminal Connection

TRIGGERING MODES OF TRIACMT2 is +VE,GATE is +VE(MODE1)MT2 is+VE, GATE is VE(MODE2)

MT2 is VE,GATE is +VE(MODE 3)MT2 is VE,GATE is VE(MODE 4)

V-I CHARACTERISTICS

SIMULINK CIRCUIT

OUTPUT WAVE FORM

APPLICATIONS:Light dimmersSpeed controls for electric fansA.C Regulators

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