Need help with AC/DC Converter

Discussion in 'General Electronics Chat' started by lotrfan76, Oct 14, 2010.

  1. lotrfan76

    Thread Starter New Member

    May 18, 2010
    Hi everyone!
    I am attempting to design a power supply which takes 120Vac and converts it to regulated 70Vdc @ 30A. I have some experience designing SMPS but never anything at this amperage. The last one I designed was +/-75Vdc @ 1.5A per channel.
    Can anyone give me tips on higher current design? Is there a preferred method? I know I have probably left some huge holes in my description so if you have questions, ask away. However, at this point, my design is wide open to ideas.
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    What's it for?
  3. lotrfan76

    Thread Starter New Member

    May 18, 2010
    It's an experiment I'm doing on de-icing windows with sheets of ITO film.
  4. marshallf3

    Well-Known Member

    Jul 26, 2010
    First of all 30A at 70V is 2,100W - right on the edge of a dedicated circuit 120 VAC duplex outlet with a 20A breaker so you're starting on the edge to begin with. I say "dedicated circuit" as in one that isn't connected to anything else and has #12 AWG running to it - most household outlets are connected as branch circuits and only have duplex outlets rated to 15A - they get a bit warm if you go past that.