Triac control AC motor, bulb

Discussion in 'The Projects Forum' started by aashishaac, Mar 10, 2016.

  1. aashishaac

    Thread Starter New Member

    May 10, 2014
    8
    0
    Hi all, I am playing with the AC control with triac and want to control AC motor and bulb using Triac,

    I made the following schematic, the first part is a zero crossing detector,
    zcr.png
    and second is the actual triac control part,
    ckt.png

    Everything works fine and OK ---- the motor speed is controllable, and the bulb also dim OK, but the problem is that,

    the motor gives jerks and the bulb gives fluctuations.when I make the speed very low

    So pls help me to make a smooth speed controller and a smooth AC bulb dimmer ----- I think I have to change the snubber circuit but how to make a good snubber ----- i don't know, OR there is some other issue

    pls reply soon and help me

    thanks in advance

    thanks
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,510
    2,369
    What is the motor technology? Induction? Universal etc?
    Max.
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,776
    1,103
    Are you sure the Arduino isn't trying to exert a phase delay > 180°, which would cause the triac firing to skip some half cycles?
     
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