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  #1  
Old 11-29-2009, 01:49 AM
electronice123 electronice123 is offline
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Default Multiplying a DC voltage without a transformer?

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???
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Old 11-29-2009, 01:56 AM
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SgtWookie SgtWookie is offline
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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.
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Old 11-29-2009, 02:27 AM
electronice123 electronice123 is offline
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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!
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Old 11-29-2009, 03:06 AM
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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.
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Old 11-29-2009, 03:21 AM
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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.
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Old 11-29-2009, 03:41 AM
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ifixit ifixit is offline
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Lightbulb

[QUOTE=Is there any way to multiply a DC or pulsed DC voltage to say 20kV without the use of a transformer???[/QUOTE]

Yes. Use a vandegraaff generator that uses a DC motor to run the belt.

Good Luck.
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Old 04-09-2010, 09:50 PM
GAMAL YONES GAMAL YONES is offline
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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
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Old 04-09-2010, 11:23 PM
Bychon Bychon is offline
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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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