More Power Baby! - 500W fly-back with ZVS driver

[emmettebrown]

I don't understand how this could kill someone.

A tazer has the same volts, but it doesn't kill people.

[Alex1M6]

@emmettebrown A taser is current limited, this isn't.

[emmettebrown]

@Alex1M6 thanks.

[TheReal1inflater]

Yo man, what's your primary? 5+5? I'm rebuilding my zvs for an x-ray tube since every other attempt failed, I've succeeded obtaining 15-20 kilovolts from 32-35vdc with IRF540s, now I have a 36vac (50vdc) 400VA supply ready, I hope I'll manage to crank at least 40 kilovolts with heck of a current. lol

[pekarj]

@TheReal1inflater Default primary is 5+5, you may also try 4+4 (depends on your capacitor)

[TheReal1inflater]

@pekarj thanks. I'm expecting to go low on capacitance, something like 330n... a 275v MKP should do the trick, MKT ones do heat up quickly and the others are pretty shitty. Nice hell of a flyback of yours, these types we call the Mother of All Flybacks, cause these types are usually really sturdy.

Anyways best of luck mate. //Ak sa nemylim, ty si Slovak? :)

[pekarj]

@TheReal1inflater Nemylis sa :)

[pekarj]

@TheReal1inflater BTW, letmo som mrknul tvoj web a mas to v podstate dobre zdokumentovane - napriklad malo ludi vyuziva ochranne iskrisko a potom sa vsetci cuduju preco im to páli trafa... Kazdopadne so ZVSkom som sa "hral" tak pred 4 rokmi :) vrchol bol ked som vymenil MOSFET-y za IGBT, vyhrabal som fajnové WIMA kondenzátory a ako zdroj slúžilo trafo zo záložného zdroja 800W s ktorym by sa dalo aj zvarat.

[TheReal1inflater]

@pekarj myslis stareho inflatera? :D O tom som zabudol ze i existuje... vtedy som moc o elektre ani ponatia nemal :D

[BlackandChrome]

I have a Flyback that I am driving with a true 55w CFL cicuit. The flyback is the type with an output cap. I am using the integrated primary and have concerns about if the voltage is to high for the flyback. How could I measure it and then reduce it? I am confused about turns ratio for CC drivers. And I keep arching from my secondary to the ferrite which is pissing me off. I've stopped playing til I can resolve the voltage question. I have access to university equipment. Thanks for the help :)

[80927269]

This flyback transformer have rectifier diode?

[pekarj]

@sprogdiklis Say please... :-)

[sprogdiklis]

give me schematic

[simsy1962]

these transformers are usually wound with recifier diodes in the winding every few metres.. making DC +ve straight out of the winding...

[Kurzschlussstrom]

Nice ZVS :o

[z0tx]

Nice arcs. Where can one find a 36V power supply for a standard ZVS driver? Would 4 9V batteries do the trick?

[Dri0m]

can send me types of MOSFETs? i use irfp250n, i use 36V like power supply and after few secodns, one MOSFET burned :D

Power of my ZVS is about 500W too :D

[pekarj]

@Dri0m Im using IRFP250 on this video, but ono MOSFET blow out after accident with screw-driver falling on circuit :D, so Ive replaced it with IGBT from Fairchild HGTG 30N60A4D

[hardstyle905]

@Dri0m You must be doing it wrong :S I use IRFP250N as well, and I powered my ZVS with a rewound MOT (!!) at more than 50V (without changing any resistors). It works very well.

[xXINSANELOSERXx]

dude, thats sick

[DimaX47]

Вот за что люблю буржуев - за аккуратность))

[Legionariopk]

OMG you're really sick

[Pyromadness]

would IRF540 mosfets work?

thanks

[weeardguy]

@Pyromadness You want FETs/MOSFETs with a low Rdson (preferably 0,2 ohm and lower) and a voltage 4 times the power supply (I'd probably go for a 600 Volt type or something...)

[MacsCanfly]

are you sure thats 40KV?

[PhxSt0rmz]

@MacsCanfly

Voltages doesnt play a role in how far it goes. Voltage rating is the starting point of the arc. Amperage, is how far it can be drawn out. If its a 45kv flyback, thats for the 120V rating...so..by the video, i'll guess its at 15-20kv

[zker666]

looks like a MOT

[lbochtler]

you will bun up the transformer.

[anotherPCfreak]

Did you used DC voltage or AC Voltage....

the circuit of mazzili says "CC"

so i dont know...

[pekarj]

It must be DC.

[coondogtheman1234]

I want to see you burn and roast things with this rig, can you do videos of that?

[rt5y]

Hi there,

What values for inductance and capacitance did you use? Also what transistors? You say this is the ZVS driver but how come you only use a single transistor? I have a a 45 volt 9 amp custom make transformer so I cant wait to build with such a good supply.

Thanks :)

[pekarj]

That single transistor with heatsink is used only as dummy topload (to make big arcs without burning it), you can see driver's PCB at 0:00. Im still using IRFP250 MOSFETs and my 45V 10A power supply (transformer from old 600W UPS)

[rt5y]

Thanks what capacitance value did you find was best and what type of caps?, I have a good stock for an electronics shop that closed down :)

[pekarj]

Capaticance - from about 300 to 900 nF, it depend on your flyback coil (so you need to experiment a little bit).

And type - you have to use capacitors for pulse use - with low ESR - (FKP, FKP2, MKP types, >630V), I always recommend cap. from WIMA.

[juniortore]

but isn't 68 nF at 250 volts recommended?

[joselu90]

Does a bipolar transistor on heatsink? I understand that you are controlling the bipolar using a mofset.

What's the frequency?

[pekarj]

No, that bipolar transistor is not working at all. That heatsink (with that bipolar transistor) is connected to HV out and its used as topload for making arcs, entire HV supply is classical ZVS driver with 40kV flyback...

[joselu90]

Ok I know, you are using the heatsink as a metalic piece as topload, and it has a bipolar disconnected

[zanta24]

That can't be 40kV

Have you done more voltage , less current?

[ottowaton]

electrons hurt... =[

[legomaniac150]

touch it, I DARE you!

[HVdischarge]

WIMA being the manufacture?

i was thinking about stripping the capacitor out of its casing to increase the thermal conductivity lol (has a see through case anyway) :-/.

thanks.

[HVdischarge]

hi, i made a ZVS driver yesterday, works great at 12v but at 24v the 400v capacitor i have (on the primary side) starts baking in about 2 seconds of use, is there anything i can do to stop this?

thanks :-)

[pekarj]

Just use better capacitors (FKP and other, no X2 or other craps). I recommend WIMA capacitors (founded in some TVs...).

[juniortore]

what transistor is that? good video though

[Sparrow338]

I don't think that heat sink/transistor has anything to do with he circuit, it's just a big piece of metal to draw arcs off of. It's probably a 2n3055.

[juniortore]

cool because i have that transistor

[jaa93997]

big ass flyback, makes big ass sparks lol i see you use the rather unefficient 2N3055 design, get more power by using the 555 PWM osc and the D1555 horizontal out transistor! (with dampers for the system´s protection)

[CrashByron]

Do you have a schematic for this? I cant seem to draw an ark more than an inch...

[jaa93997]

dude its all over the internet, perhaps you are using the wrong components....

[alwinovich]

i have drawn arks way bigger than 1" but my arcs are smaller

[Sparrow338]

I think he's using the ZVS driver circuit, and he just happens to be drawing the arcs off the heat sink with a 2n3055 mounted on it... 2n3055's can't even switch that much power anyways.

[jovicakluk]

lol its a zvs driver not a shitty 2n3055 driver

[SKarmytech]

please can you tell how do you identify the feedback, primary coil and secondary base pins on a 15 pin flyback? please reply

[phazonxl]

LICK IT!!!

[mbotv10]

how to make this please give a schematic

[lo9765]

Where you get this transformer without rectifier?

[racerxdl]

With 2 IRFP460 (500V 20A) I can use what Max Voltage?

[jmartis2]

I would say approx. 120V maximum.

[iknowad]

LOL I'm scared.

[rgsgww]

try some 120v lol prolly will blow it...but try it lol

[98209276]

which mosfet would work similar to the IRFP250 out of these: IRF520 TMOS,IRFP450 HEXFET, PHP6N60E MOSFET,SSP60N06 MOSFET ,MTP3055E TMOS would a 2n3055 work in this circuit?

[pekarj]

Only IRFP450 is acceptable, it must be minimal 200V MOSFET/IGBT, ~20A and Rds must be lower than 150mOhm

[98209276]

damm i thought that would be the one its the most expensive one of the lot $9.00 per mosfet damm ill have to save $18.oo thanks

[17hmr243]

could you help give advice on my fly back 10 pin from PC monitor please?

[pekarj]

You must make new primary coil (wind it on other side of ferrite core) and the HV output is red wire from top of transformer and pin 8 is ground

[killer1479]

LOL

to think people do stuff this dangerous and live is amazing, but hey thanks for sharing the vid with us

[pekarj]

See my new video ZVS driver 10kV 0.5 - 1kW (click to More from this user) - on video you can see my new transformer 10kV on ZVS, next new video will be about my DRI-SSTC :)

[newtonianbarf]

Oh my god, HUGE! Not even my MOT makes arcs that big! That's pushing about 100 mA through the high end, correct?

[pekarj]

yes, if my calculations are correct, it gave 125mA out... bud propably more, because is hard to measure power compsuption - bud if I make BIG arc, Ampermeter shows from 10 to 30A, - if we choose midle - 20A - its 45V * 20A = 900W ! - then output is 225mA (Circuit efficient is higher than 95%)

[pekarj]

My SSTC (Solid state tesla coil) commning soon, so you will see bigger sparks (over 45 centimeters -17.7 inch)

[Aeryk333]

Cool! Hehe, was it fried in result of being in contact with the HV? Or was it over-amperage? Nice idea.

[pekarj]

i think that was overloaded, i used that tranzistor on my old baby-HV generator :D (few Watts)

[Aeryk333]

Rarely can be seen such big arcs off from a transistor heatsink. :D

[pekarj]

:) i havent some topload like on Tesla Coil, so i look to my room and see this old heatsink with burned transistor, perfect topload :), its unusual, bud it works