single phase full wave thyristor controlled rectifier

Discussion in 'The Projects Forum' started by ninjaman007, Apr 22, 2010.

  1. ninjaman007

    Thread Starter New Member

    Nov 25, 2009
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    0
    Hi, anyone knows how to construct single phase full wave?

    I constructed a thyristor trigger circuit and single phase half wave..

    But single phase full wave I not sure how to construct...
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. ninjaman007

    Thread Starter New Member

    Nov 25, 2009
    3
    0
    I know full wave needs 4 thyristor..
    But how to connect them with the thyristor trigger circuit?
    and the 3rd and 4th thyristor need to trigger 180 degree after the 1st and 2nd thyristor...How they all relate with each other?
     
  4. rjenkins

    AAC Fanatic!

    Nov 6, 2005
    1,015
    69
    Draw a bridge rectifier with four diodes.

    Then add Gate connections to the two diodes feeding the positive output; make them thyristors.

    That is a basic full wave thyristor bridge. You only need two thyristors as there is no corrent path unless they are turned on.

    You can trigger both together as at any time one will be forward biassed and the other reverse; only the forward one will conduct.

    There are other possible combinations, but that is probably the most common one and gives full control of the DC output.
     
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