Problem with Triac firing

Discussion in 'The Projects Forum' started by kapinesh, Dec 10, 2008.

  1. kapinesh

    Thread Starter New Member

    Dec 10, 2008
    1
    0
    Hi everyone,
    I am using a Triac in my project. But I am getting problem in firing the Triac i.e. the Triac is not fired.
    Do anyone suggest me why there is this problem.

    Thanks in advance.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If you can post up the circuit drawing, we might be able to help.
     
  3. steveb

    Senior Member

    Jul 3, 2008
    2,433
    469
    Is current able to flow once you fire the triac? Triacs will turn off once the current stops flowing. Also, if current can't flow for some reason at firing time (high inductance and short firing pulse), they wont turn on.
     
    Last edited: Dec 10, 2008
  4. haha11

    New Member

    Dec 10, 2008
    9
    0
    triacs suck !

    they get damaged easily ..if load is inductive

    :mad:
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Every active element (BJT, MOS, IGBT, TRIAC, Thyristor, etc) will get destroyed if you drive an inductive load with it and don't design the circuit properly.
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    If the resistance seen by the gate is large then then TRIAC can't fire because the current flowing in the gate is less than needed.
     
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