Everything about the ZVS driver

In this Video I talk about my ZVS driver, I explain how it works and draw some arcs.
Unfortunately I could not draw any baking soda arcs in this video, since I did not have appropriate eye protection laying around.

Note: I am sorry for the few audio artefacts that appeared in the video and I might have to slightly change my recording setup.

0:00-0:22 Intro
0:22-0:37 Video overview
0:37-4:11 Schematic and explanation
4:11-5:31 Caps info
5:31-6:07 Transistor mounting info
6:07-6:37 what now?
6:37-8:07 Scope measurements/waveforms
8:07-8:51 Arcs
8:51-9:08 Outro

[sciencebysergio]

Important Note:

I made a mistake in my explenation. At min 1:15 I claimed that the voltage across that part of the primary rises, this is not the case. It is the oposite side of the primary.

Also if you have problems with lockup increasing the choke inductance should help. And if your capacitors heat up too much, using FKP instead of MKP capacitors should help, as well as most metal foil capacitors since they should be able to handle high currents.

[johnruscigno]

Nice work. The single choke version always seemed to run better for some reason. I made a hybrid setup will both choke coils on a giant ferrite ring and that's been working out for me.

[tze-ven]

Those 10k resistors play a minor role in the circuit. They are there just to allow the MOSFET gates to be fully discharged to zero because those diodes can only bring them down to one forward-bias diode voltage.

[nevales]

Great demo and clear explanation. Thank you

[Dukey]

Worth noting that this circuit is based on the Baxandall converter, which is in turn influenced by the Royer oscillator.

[ethansprojects]

Thank you! I finally understand how it works.

[oplex]

I built mine by just following your build and it works! The funny thing is, i built mine with some components that are more or less out of value and some that are completely different. And yet, it produces 30kv on the output. Pretty-pretty neat to say the least.

[hardnachopuppy]

Another good source of capacitors are induction heater capacitors they work really well
I tried running my zvs driver on 48V and the capacitors only got slightly warm (28A current draw)
Also i found out that using 330ohm resistors reduces the mosfet temperature by a lot

[Electricalengineeringchannel]

Hello please, may I ask where did you find the cooling plate for the mosfets, because I can’t find it anywhere

[trinhquanghung]

@sciencebysergio Could you please tell me how long the arc can be sustained before the ZVS circuit or transformer begins to heat up significantly?

[waterfuel]

----If the capacitor is across the whole primary, and switching only uses 1/2 primary, how do we figure the

[localbroadcast]

When describing the circuit operation, @1:11 you talk about the voltage through the transformer coil rising, obviously due to the top mosfet being closed. You then state that the voltage through the transformer coil reaching a peak, and then starting to go down. What you fail to mention is what causes it to reach a peak and begin to decrease? I can understand why the voltage would reach a peak, but why does it start to decrease? You state that the top diode (uf4007) discharges the gate of the mosfet. What determines the time that this happens? Is it when the capacitors reach a certain voltage? I'd appreciate any clarification you can give, as I am at this point without access to an oscilloscope and can't observe the circuit behavior for myself, and I still can't seem to understand how to get ltspice to work for me. It's a helluva lot of work to get a basic circuit like this up and running due to having to find all these different parts or functional equivalents. Thanks for your time.

[andrewel]

I personally used a ceramic(cause those generally can be used for DC and AC circuits as they have no polarity and mine were rated for 25kilovoltz

[johnhunter]

I can't find anything about baking soda arcs online, can you please provide more information?

[Ifaum]

Does the zvs driver easily overheat? I tried to make high voltage power supply that needs to work for prolonged time like more than hour. I believe flyback tranformer is durable since it can be used more than hour in old tv but still not sure with zvs driver

[bmind]

What will happen it I connect the ZVS to a regular 12V/230V transformer. If I connect a light bulb to the 230V secondary winding, will it work?

[oloololowski]

can i solder two 12v 0, 5w zener diodes? will it do the job?

[jm]

Please, could you suggest a simple circuit to modulate the ZVS Flyback output with an audio signal ?

[Alquimia_Nasgul.]

Hola ¿cuanto tiempo puede estar encendido casi a su máximo de voltaje de entrada?70 voltios y 5 amperios por ejemplo?

[shawncalderon]

Nice presentation! Can you provide a quick diagram of where you placed the Oscope leads? I'm so glad I found this channel!