Introduction: The ZVS Driver

Everybody who is interested in high voltage herd about  the zvs driver for the flyback transformer.
Parts:
2x IRFP250 n-fet
2x 12v zenner diodes
2x 470ohm resistors
2x 10kohm resistors
2x 400v fast diodes
1x inductor 200uH
1x 250v capacitor 0.68uF or higher

Step 1: Assembly

Mount mosfets on a large heatsink,
Solder everything togather

Step 2: Fineshed Assembly

Everything ready to be connected to power supply.

Step 3: Use for the Driver

It can be used as a power supply for the tesla coil or it can be used as an inductin heater ( for the induction heater try a 300v with 1uF or higher)

Comments

author
Wolf6774 made it!(author)2016-05-20

I recently made a zvs driver, and I am using a 400w power supply, I hooked up the circuit to the 12v rail, and it doesn't produce any arcs, but one of the transistors heats up, could anyone possibly help? I've checked all of the connections, and an open to any advice given.

author
aclark17 made it!(author)2017-03-01

I've heard of this problem being related to not enough voltage to drive the MOSFETs, have you tried going over 12v?

author
GyurikaK made it!(author)2016-04-05

Hello, my zvs works perfectly with 2 irfp260n's but they heat up pretty quickly, my question is could I put 2 more of them in parallel so the zvs could deal with more current and voltage or it will just blew up everything?

author
SallahS made it!(author)2016-10-04

You can use up to 4 transistors in parallel (that is the maximum I tested, more is surely possible). Be sure to take a bunch out of the same batch. Add a 0.1Ohm resistor in series (at the source of the transistors). Reduce thermal resistance to lower the temperature of the transistors: Use heat conduction paste between the transistors and their cooling surfaces. Sooner or later (more sooner :) ) the coil will be the hottest part of the circuit. So, for higher powers I would recommend to go for a completely different design using a full bridge driver based on a IRS2543 or similar.

author
aclark17 made it!(author)2016-12-12

I think its power supply related. I use IRFP250n MOSFETs and used the same schematic you did but I power it with a Variac running through a full bridge rectifier to get the DC power I need and I have zero issues with heat, the only problem I have is the flyback arcing to itself and the voltage getting so high it arcs through wire jackets lol

author
rah187 made it!(author)2016-05-26

This circuit actually worked well for me the first time around when I placed the components on a breadboard, then it stopped working. I thought my connectins were sloppy so I etched a board and it still didn't work. It is quite possible I blew the MOSFETS. However, this circuit was great while it was working.

By the way: great 'Ible!

author
Alex1M6 made it!(author)2011-08-23
Nice guide. Have you ever tried yours on 24v or higher? I find there is quite a difference between running a ZVS on 12 and on 24V.


author
theVader75 made it!(author)2011-08-24

no i didn't but now i want to build a supply for it

author
Alex1M6 made it!(author)2011-08-24

Lead acid battery's work well for this, that is what I used.

author
cccp3 made it!(author)2016-05-15

I put a 300A meter across a 7Ah 12v accu and read 300 for 5 seconds straight

author
FriXs made it!(author)2015-03-09

anyone tried rc accus yet with 60c/120c max? would they get destroyed?

author
theVader75 made it!(author)2011-08-25

yes they do but i dont have so much money to spend on a project

author
GioC1 made it!(author)2015-06-01

i'm planing to use power supply from my old xbox(360) to power my ZVS, that i haven't finished yet, but

will this be the proper power supply for it or not?

author
GyurikaK made it!(author)2016-02-21

Yes it will be :) but... I think you might want to add another one in series to increase voltage to obtain longer arcs, since the xbox psu is just 12v...the amperage is ok :) I think it is 14,5A

author
gdawg98 made it!(author)2016-01-23

could this support a 70V 200A DC power supply for a induction heater to make a induction furnace

author
RedstoneM made it!(author)2015-11-22

Can I use a 1N4007 for that or do I need a UF4007?

author
RedstoneM made it!(author)2015-11-26

BA159-E3/73 works as a fast diode, 500ns recovery time. Makes nice induction heater (needs some work for a smelter)

author
skozima made it!(author)2014-03-14

http://akizukidenshi.com/catalog/default.aspx
このサイトの中の商品でIRFP250 N-FET の代用できるものを教えてください。

author
skozima made it!(author)2014-03-14

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このサイトの中でIRFP250 N-FET の代用できるものはありますか?

author
leviterande made it!(author)2013-08-30

Hi, I want to power a SGTC with this ZVS driver, my question: what about the dangers of burning the mosfets and flyback secondary from the SGTC kickbacks? or shouldnt I be worried?

author
Homepwner made it!(author)2012-04-30

O.K. I built one of these on a plywood board and it worked beautifully at 24 volts from 2 car batteries. I hooked the secondary leads through A DVD disc and it exploded. I replaced every part of the first zvs driver and it didn't work, I built a 2nd, 3rd and fourth model, different methods, every time, and always new parts. Now all I get is an inductor that arcs and hisses or one of the Irfp250's heats up, ready to explode. I upgraded to 5W 470 ohm resistors,1-5 watt zener diodes, a .68uf non electrolytic capacitor rated @630 volts. I've wound 3 different inductors with different types of wire and different ferrite cores. I don't know what to do.....
anyone want to have a look at my latest proto board mounted unit?

author
Alex1M6 made it!(author)2013-07-03

Use a commercial inductor instead that you know it will not saturate, which sounds like what might have caused your circuit to latch up. It needs to be the powered iron type and have a saturation current rating of about 10 amps or more.

author
Homepwner made it!(author)2013-07-03

https://www.youtube.com/watch?v=HLnGGBtzmu8&feature=youtube_gdata_player
Hi, I did purchase a few new components last summer and found a combination that worked for me.
Less science based than trial and error :) I made a 4'tall jacobs ladder and although I wish I had made an instructable at the time....I at least made a long video on YouTube showing the layout... check it out if you want...and feel free to criticize. This setup oddly keeps cool except for the capacitors in the charge tank.
Thanks for the feedback!

author
Alex1M6 made it!(author)2013-07-03

That is really nice, I like how you have it all on a piece of wood and there is an switch mounted just in case ( :

What is the longest you have had it running for?

author
Homepwner made it!(author)2013-07-03

Thanks! I did use your instructables as partial inspiration for this build so I appreciate the compliment!
I have run it for 3-4 minutes. I really expected the Mosfets to get hot. They don't even warm up! The two capacitors connected to the primary windings do warm up fairly quickly.
The Zvs circuit shows only one cap....
I found that 2 caps heated up slower when connected in parallel..

author
Alex1M6 made it!(author)2013-07-04

The capacitors see very high peak currents which is why they along with the primary winding get quite warm (becuase of the resonant tank they form).

I have had MKP capacitors melt open before after long runs of my driver, lol.

These are the sort of capacitors they normally use in this type of application, and they normally have many in parallel. But if you want to see some real work capacitors then type in "induction heating capacitors" into google images. Huge things!

Vishay-MKP386-snubber-capacitors.png
author
iTixle made it!(author)2012-07-28

I would try using a power supply with less current. Generally, car batteries have a good deal of current available and that can lead to things popping. The reason it's not working might be that your MOSFET's are instantly frying. I don't think IRFP250's are rated for that much current. If you must use car batteries as a power supply, get some more robust MOSFET's.

author
guruji1 made it!(author)2012-02-01

How much voltage and freq it gives out?
Thanks

author
dog+digger made it!(author)2011-09-11

The schematic (one) does not make sense. It's just a schematic for a tesla coil

author
dog+digger made it!(author)2011-09-11

oops, my bad

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