80v dc source

Discussion in 'The Projects Forum' started by tuti, Sep 18, 2007.

  1. tuti

    Thread Starter New Member

    Sep 18, 2007
    1
    0
    i am triyng to build an 80 v dc source for a project i know that the easieste way to do oit is to use a transformer but getting an 80 volts transformer is imposible for me.
    is there any other way to drop the voltaje to 80 volts before the diode bridge?
    thanks
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Can you get a transformer with a 56 volt secondary? Rectification and filtering will give close to 80 VDC. How much current and how accurate must the 80 volts be?
     
  3. Eduard Munteanu

    Active Member

    Sep 1, 2007
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    0
    You could also use a DC-DC converter to divide/multiply the voltage output of another power supply.
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Another option is to use a variable transformer, if one is available.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    What is your output current requirement?

    If small, you could go with, say, a 24vac transformer, and use a voltage quadrupler circuit - just diodes and capacitors. You won't get a lot of current, but that's one inexpensive way to go.

    Here's a page with example voltage doubler, tripler and quadrupler schematics:
    http://www.coolcircuit.com/circuit/voltage/
    You could use 1N4004 or 1N4007 epoxy rectifiers for the diodes, among others.

    Voltage regulation (if required) will require a bit of research. I don't know offhand of a single-IC solution for a Vreg for that high of a voltage.
     
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