This article is directly related to electronics, high voltage and arcs. Its purpose is to describe one of the latest additons to my High Voltage collection: a ZVS Driver. A ZVS driver is a resonant zero-voltage switching driver.  You can read more about it here

For my variant I've used the following:
- 2xIRFP460 Mosfet / 500V, 20A
- 2x270Ohm 5W resistor
- 2xBYV26E 1000V/1A fast diodes
- 2xZenner diodes
- 0.33 x2 Capacitor
- 2mm Cu wire for the 5+5 turns flyback primary

Schematic is here:
ZVS DRIVER schematics

The Inductor I've use has very few turns, that gives a lot of current on the flyback output. For 14V / 4A input the mosfets stay cool, so a small aluminum cooler was sufficient.
Here is my circuit's assembly:

The arcs produced by this driver are very hot, the copper ground wire goes red quickly, and anything brought close to the arc is incinerated. Be careful if you're planning to build one of these. You can see more high voltage power supplies here.

You may also use the ZVS Flyback Driver with a Ferrite core and a custom made HV secondary, see this article.
Or you can use a secondary with only a few turns of tick cooper wire, to get a current so high, that can melt thin copper wires connected across the output. This would be a High current inverter.

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110 thoughts on “ZVS Flyback Driver

  • May 25, 2012 at 10:56 pm

    Last thought.. . I found out the hard way that transistor quality really matters.. . Two are burned, two are no good and another pair works fine ! I m working this with 4 nimhs battery packs in series and parallel (16v,6.6a), it works fine though the arks are not too big but nice bright colors and really really hot ! ^^

    I still wonder what the hv diode is, and if i can protect my battery packs.. .
    But thanks anyway !

  • May 28, 2012 at 9:16 pm

    Looks like you’re having fun, Sebo.

  • May 28, 2012 at 9:21 pm

    Very much ! As it took me a long time to get it to work.. .
    But good advice and patience gets you there ! 😉

  • December 27, 2012 at 8:32 pm

    Can you do a test to see if this will penetrate 1/2 sheet rock and kill a mouse ? Put a piece of hot dog same length as mouse and see if it reaches it with a cap that is under both ends of the hot dog.

  • December 28, 2012 at 11:37 am

    @James, you’re joking, right?

  • July 9, 2013 at 10:26 pm

    Hi Radu I’ve build this driver and works well. What capacitor should I use to make it’s frequency to 50hz?

  • July 10, 2013 at 12:36 am

    This is a high frequency oscillator.

  • August 3, 2013 at 4:22 pm

    Hi sir Radu any updates about your zvs? :)

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