full-bridge converter

Discussion in 'General Electronics Chat' started by grad-student, Jan 19, 2015.

  1. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    Hello,
    I am designing a full-bridge dc-dc converter. I need to get a Vout of around 180V. I am not getting a steady Vout from this design. Any help or advice?
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Why do you have ground connected to the secondary of the transformer, instead of the bottom of the load?
     
  3. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    I need a ground reference on the right hand side of the transformer. Floating circuits (with no DC path to ground) are not allowed.
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Read once again what I wrote, connect the ground to the bottom of the load, not the transformer.
     
  5. ronv

    AAC Fanatic!

    Nov 12, 2008
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    Are those temperature dependent FETs? If so replace with normal ones (for spice) and see if the results are better. Then we can try to go from there.
    I think spice would be happy with meg-ohms to ground.
     
  6. grad-student

    Thread Starter New Member

    Nov 19, 2014
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    Thanks a lot.
     
    Last edited: Jan 19, 2015
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