Voltage multiplier Driver

Discussion in 'General Electronics Chat' started by jester1, Mar 17, 2011.

  1. jester1

    Thread Starter Member

    Feb 10, 2011
    14
    0
    My current problem is a driver for my voltage multiplier circuit. The multiplier consists of 500 stages of 1n4007 diodes and 820pf 1kv non pol caps (and no it's not a hypothetical circuit I spent 3 weeks making it). Now i gave up trying to find a transformer that takes in 120vac and outputs roughly 300-330 vac there either not available or way too expensive. So my question is, is there a circuit that doesn't involve a transformer to invert the ac up.(like an ac to ac inverter) If no circuit exits the transformer idea isn't out of the question, but it has to be cheap.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    What is this thing for?
     
  3. jester1

    Thread Starter Member

    Feb 10, 2011
    14
    0
    Its for a powder coating gun it will output a negative high voltage.
     
  4. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,010
    1,530
    Get a 240 V to 120 V step down transformer and wire the 120 side(normally the secondary on this transformer) as the primary. This will give a 240 V out put. Then adjust the number of stages in your voltage multiplier to get the output voltage you want/need.

    However you end up doing it, just make sure you use a transformer from your mains and fuse the circuit. Safety first!!!!
     
  5. jester1

    Thread Starter Member

    Feb 10, 2011
    14
    0
    The problem is I don't think even 240v would run the circuit. I plugged in a 10 stage circuit of the same components into 120v and got no output.
     
  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,010
    1,530
    Do you have the diodes and caps in the correct sequence? Are the diodes connected in the correct direction(anode and cathode correct)? When connecting that many stages, its easy to slip up. Here is a application note with information; http://www.vishay.com/docs/88842/anusingr.pdf

    I know you want to do this DIY, but somethings are just easier/less frustrating to buy ready made. I have a powder coat gun from Harbor Freight that so far works real good; http://www.harborfreight.com/10-30-psi-powder-coating-system-94244.html
    on sale for $69.99, with a 20% off coupon in most car mags you can't beat it.
     
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