ZVS Induction Heater

[Arjoonmoal]

howi is the tank cap connected. is it parallel to he work coil or is it in series. i have a very big 10uf 450Vac mkp capacitor will be good. i mean the more capacitance you have is the better or it should be within a range of values

[TheLightningStalker]

One ruined screwdriver

[compwiz00]

@TheLightningStalker if I remember right, this screwdriver was defective from the box. The head was only rounded instead of shaped to turn a screw.

[Salarbs]

I Will be thank full to you if you answer a few of my questions

Q: What is the tank Cap value?

Q:How many amps iz the PSU out putting on the 12 v rail,15 or 25?

Q:do the MOSFET's get warm?

Q: how many turns are on the inductor u use?

Please answer my question i am having a really hard time figuring this out!! :(

[compwiz00]

@Salarbs I think that was a 2uF capacitor. I don't remember the current, I think it was around 10 amps. It was the 12v rail of a computer PSU. I just put as many turns as I could fit on a iron core toroid from a computer power supply.

The mosfets get quite hot here, but I found out it was because I somehow used two different gauge wire for the work coil. It runs a lot cooler when you do it right, and use longer wires leading to the coil. like in my other induction heater video.

[Elektrobastler]

@compwiz00 Using longer wires reduces the current. For best results, use as short wires as possible and put the capacitor the nearest possible to the induction coil.

My induction heater ZVS needs 20-30A at 12V, but has also a bit more power than yours.

Using longer wires results in less output power.

[compwiz00]

@Elektrobastler That's true. But more power also means more heat for the electronics. I was having issues keeping it cool with extremely short wire. I would try it again, but I've managed to light something on fire almost every time I play with it. I need better parts, I think. In this video, I'm pretty sure that power supply will only give 15 amps.

Yeah, this thing draws about 20 amps at 24v, from batteries when powering a TV flyback. The arcs melt steel hanger wire.

[mrFishball1992]

@compwiz00 can such a circuit be made to fully liquidise metals? like aluminum?

[MrThomassss]

how man amps have the psu?

[HVdischarge]

did you rip the core out of a flyback then re-wind it for a lower voltage so you gain current?

[BenHutchinson1]

What does ZVS stand for. And why use a flyback transformer? I mean they deliver high voltage at relatively low current. So they would seem useless for an induction heater.

[HVdischarge]

Don't quote me on this, but i beleive ZVS stands for "zero-volt-switching" which i also beleive is why the mosfets can switch all that power without barely getting warm :-D.

[BenHutchinson1]

What does zero-volt-switching do? Does it mean zero crossing, where the voltage goes from +12 to -12 volts (and thus crossing zero when it goes from -12 to +12)? Or does it mean going from 0 to +12 volts, where 0 volts is one end of the wave form? I assume the "zero" of "zero voltage switching" comes from somewhere.

[HVdischarge]

i "think" that basically the mosfets switch when there is little or no voltage across the junction so there is little switching losses, resulting in less heat from the mosfets and a higher effeiceny. has anybody else replied to you as most people on here know alot more than me :-D.

[BenHutchinson1]

How hot did the electromagnetic coil get? If enough current was flowing to create a magnetic field strong enough to induce a current in the screw driver strong enough to make it glow red hot, then a LOT of current must also have been flowing through the electromagnetic coil. So even though it isn't glowing, I bet it got VERY hot.

[compwiz00]

You will notice that all the enamel is burned off of the wires. it became red hot once. But I later found out that I used wire that was too small.

[BenHutchinson1]

Actually I thought you were just using bare wire for the coil and were just being careful about not shorting the turns of the coil together.

[compwiz00]

@BenHutchinson1 I was. look at my other video to see what happens when the coil gets shorted...

[Gabriel9917]

what kind of power supply are u using

?

[compwiz00]

@Gabriel9917 It's an old 300 watt AT computer PSU. it's running on the 12v rail.

[BenHutchinson1]

How hot did the coil get? And why did you have a high voltage capacitor there?

[akkudakkupl]

the circuit is working in resonance :P

[Audi100C4Owner]

Oh my God it's amazing !!

I have ZVS flyback driver, how can I adapt it for induktion heating ??

[Salarbs]

@Audi100C4Owner Dude just pace what ever u uwanna heat in the center tapped primary of the zvs instead of a flyback transformer

[Slu1982]

Plis make me schema, i have zvs....

[Desaster6]

Is it computer output?

[MOJTABASHOMAL]

how much is the output power?

[jster1963]

Hi,

I'm a novice and want to make an induction heater like yours. How can I get the plans and components? Any help would be appreciated.

Thanks....jster

[compwiz00]

Search Google for "ZVS flyback driver"

And instead of winding the coil on a flyback core just make one like in the video.

use a big heatsink or there WILL be smoke

if you need help the people on 4hv . org

are very helpful as long as dont go begging for plans.

[jster1963]

Thank you so much. Take care...jster

[compwiz00]

mine died, i guess i should have turned it off when the insulation started melting off the wires...

made quite a bang and lots of nasty smoke!

[jster1963]

I'll try to be careful! Thanks

[compwiz00]

Good luck

[jonnic2000]

how is this ZVS?

[compwiz00]

it uses the ZVS Flyback driver circuit

[jumpinfreak]

that looks good. can you tell me how many turns you used for the air coil and what type of cap

thanks

[jumpinfreak]

that looks good can you tell me how many turns you used for the air coil and what type of capacitor because my cap keeps blowing

[compwiz00]

7+7 turns

it is a 2uf cap

i cant post a link here

[jumpinfreak]

could you send me the link trough the mail account of youtube there you can post links. thanks

[98209276]

very smart lol it is a pull push driver lol heps kool. did you use irfp250 mosfets or another kind because i cant find them so i need to know what the next best thing would be thankyou.

[compwiz00]

i used IRFP250

you can find them at Mouser