Multiplying a DC voltage without a transformer?

Discussion in 'General Electronics Chat' started by electronice123, Nov 28, 2009.

  1. electronice123

    Thread Starter Active Member

    Oct 10, 2008
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    I know an AC voltage can be multiplied and converted to a high dc voltage using a voltage multiplier.

    Is there any way to multiply a DC or pulsed DC voltage to say 20kV without the use of a transformer???
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    Going from a low voltage to 20kv wouldn't really be practical without the use of a transformer.

    You could use switched capacitor networks to boost DC, but it certainly would take a while, and you'd lose power in the switching/charging/etc.
     
  3. electronice123

    Thread Starter Active Member

    Oct 10, 2008
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    OK. I was just wondering because I have never seen or heard of any other way than by using a transformer. Seems to me it would be just as easy to use a small inverter and voltage multiplier, or a transformer like you mentioned.

    Thanks!
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,725
    Well, you can use switched inductors in a boost configuration to go up maybe 20x or so your input voltage pretty easily. But if you want to go from 12v to 20kv, that's really a different ballgame.
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    And you can use a diode multiplier for lower increases, like X2 or X3. It requires a switching oscillator though, but that is an easy option nowadays.
     
  6. ifixit

    Well-Known Member

    Nov 20, 2008
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  7. GAMAL YONES

    New Member

    Feb 19, 2010
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    dear friends

    how can i calculate the value of capacitance and capacity of diode which use for voltage doubler

    many thanks
    gamal yones
     
  8. Bychon

    Member

    Mar 12, 2010
    469
    41
    LOL! The Van De Graff generator is a perfectly reasonable answer, considering nobody said how much current was needed. Thanks. Your imagination struck me as funny and I appreciate a laugh.
     
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