hey! great video, i'm almost jealous lol! where did you get a rear projection TV from? they are pretty big things, but you still can get big as flybacks from 29" TVs, eh? those are some massive arcs.... i have a huge pile of flybacks that i need to use soon enough when i get the parts for the drivers etc with big black ones which are typical, but it is a joy have older ones.
@ubuntupokemoninc@ubuntupokemoninc It overheats about as fast as a mot. The real problem with a flyback overheating is that there is a thick layer of plastic between the coil and the outside and that makes for a delay in heat transfer from the coil to the outside. You can arc it for about 2 seconds and then turn it off and 5 seconds later, The outside of the flyback gets very hot.
are those 12 volt zeners? If you dont want to have 2 470 ohm resistors in series you can just use 15 volt zeners, ot higher if you want, either voltage, the zeners do the same job. Also, you are supposed to use 2 watt 470 resistors (when not series) instead of 1/2 watt you got there I can tell from the size. Also, it looks like they got warm looking a little brown. But the mod is good since it still has a nice output
i dunno i stopped doing high voltage experiments since the day i got accidentally electricuted by a high voltage capacitor OUCH!!! damn my hand was numbed for hours -_-
no, it would hurt though. i dont think flybacks can kill you period. Dont take my word though. I know a flyback at 40 watts cant kill you, above 100 i dont know.
Sounds a little small... Not nearly anough amperage from the sound of it. (@ 10 Kv, Apmerage = 0.004) I doubt you'll get any serious defibrillation unless you are pushing the thing right into your chest.
Very nice! How's the flyback holding up? What voltage Zener didoes are you running? Did you find that running 12volters doesn't perform well with the higher voltage input?
The flybacks in newer TV's have rectification. I'm pretty sure it's usually just half-wave rectification. However since these power levels and voltages are WAY above what the flyback is rated for I'd image the didoes can't stand the voltage and basically the transformer just puts out AC.
Hi, I did a ZVS today and the MOSFETS blew up right away in a very spectacular way, actually caught fire and burned with flames :)))
The thing is I used a very powerful toroidal transformer to power the circuit (26V) and normal, not FAST diodes. I also didn't have a heatsink, but it would have been useless anyway, they didn't blow up because of that.
What am I doing wrong ?
I posted a video about this, search please if u want for "ZVS Flyback Driver BLOWS UP".
@joyange1 no, I think he is talking about the diode in some rectified flybacks which suck. With rectified flybacks you can push a whole shitload in and get a little weak purple arc out. Also, even though it is a weak arc, it draws a lot from the primary, and that can stress the wire on the flyback so yes, go with an AC flyback and thicker wire on the primary.
That 200 watts of power dissipation. That means how much power the device can resist and turn into heat. For example, Let say you turn it on at 50% and run 20v@10A(200W)(supply), that means your load is getting 10V@10A(100W) and the other 10V@10A(100W) is being absorbed by the MOSFET itself and dissipating that waste energy as heat. The IRFP250 can handle 200v@30A(6000W). At a full 30A load @ 8mOHMs (fully turned on.) that a 2.4 volt drop @ 30A equals about 72 watts of dissipation.
the main problem in ciruit design are switching losses, so if turning off the FET at full current wastes 0.01Ws of energy and the switching frequency is 20 kHz, then 200Ws per sec respectively 200W of power are dissipated plus 10-20W for on-resistance losses. The thing that makes the zero-current switching mode work so well is FETs being switched at zero current (hence the name). Got it? :)
lol ur relly pushing ur flyback there nice job im going to try a rear projection on my zvs see if i can get that power if i evin go that high with any of my flybacks i get internal arcing and one time one of my flybacks exploded lol that was scarry..
I would just use a ohmmeter and see witch pins have the hiest resistance(around 4 ohms).
FYI: For the ZVS driver, You need to wind your own primary coil as you can seen in the video the 2 red and blue windings on the flybacks ferite core. Its a 4+4 turn configuration. Look at a ZVS driver schematic for more infomation.
That's very nice, how is the flyback going, is it hot? Most of the flybacks I found burn out at ~500W (they short out internally and sometimes burst in flames!)
What you need to use is a flyback from a rear projection tv, they are twice a big as one from a tv and 3 times bigger then that of a computer monitor. As far as getting hot goes, I could run it for about a 2 minutes before it got to hot to touch. Then I would shut it down and let it cool off.
UMLTK: About 2 days after I shot this video, I was able to run it at over a 1100 watts (60V @ 19A). I wanted to take it up to 72 volts but the VDS on the mosfet was peeking at 192 volts and the max for the irfp250 is 200 volts. So i took a turn off the flybacks winding to make it a 4+4 turn, and that boosted the power without having to boost the voltage.
FYI: The arcs only got about 1.5cm longer when I ran it from 700watts to 1100watts. I think most of the power went to heating the flyback althought I saw no clipping on the scope.
AWOW: I only ran it for about 10 seconds and then check the temp and althought it was cool to the touch at first about 5 seconds later it got super hot. The sec. winding got hot soo fast, that it took a few seconds for the plastic housing to conduct the heat to the surface.
FN: I really don't know how far I can push this flyback, but I got this rule about electronics and that is, "If it's too hot to touch!, IT'S TOO HOT!!!".
Thanks for the info, I once ran a flyback at 600W (video is in my profile) but just for a few seconds.
Too bad I can't see any rear projection TV's thrown away :P I have to use "multi-flyback" for more power (I once used a quad-flyback that gave 30cm arcs and it blew my driver :D)
Very nice arcs!! Cool channel ;-)
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high1voltage1rules 2 weeks ago
does wire length in the circuit affect the size of the arcs ?
PlasmaCreator351 2 months ago
i will die if i touch the focus screen of the flyback?
chilidress 6 months ago
nice hot arcs!
lokeycmos 8 months ago
hey! great video, i'm almost jealous lol! where did you get a rear projection TV from? they are pretty big things, but you still can get big as flybacks from 29" TVs, eh? those are some massive arcs.... i have a huge pile of flybacks that i need to use soon enough when i get the parts for the drivers etc with big black ones which are typical, but it is a joy have older ones.
a380rockerfan 1 year ago
It looks like the gates are connected to the Zeners, pull-down resistors and nothing else. This shouldn't work?
TheLightningStalker 1 year ago
does the flyback heat anything like a mot does, if you don't know a mot over heats in like 15 of arcing.
ubuntupokemoninc 1 year ago 2
@ubuntupokemoninc @ubuntupokemoninc It overheats about as fast as a mot. The real problem with a flyback overheating is that there is a thick layer of plastic between the coil and the outside and that makes for a delay in heat transfer from the coil to the outside. You can arc it for about 2 seconds and then turn it off and 5 seconds later, The outside of the flyback gets very hot.
joyange1 1 year ago
@joyange1
I can run my ZVS for Minutes without gettin any part hot :)
Will post some videos when completely finished.
Btw, got some problems with primary circuit arcing while driving two flybacks^^
anotherPCfreak 1 year ago
are those 12 volt zeners? If you dont want to have 2 470 ohm resistors in series you can just use 15 volt zeners, ot higher if you want, either voltage, the zeners do the same job. Also, you are supposed to use 2 watt 470 resistors (when not series) instead of 1/2 watt you got there I can tell from the size. Also, it looks like they got warm looking a little brown. But the mod is good since it still has a nice output
juniortore1 1 year ago
i dunno i stopped doing high voltage experiments since the day i got accidentally electricuted by a high voltage capacitor OUCH!!! damn my hand was numbed for hours -_-
renekenshin6573 1 year ago
what is the power dissipation on those FETs, are they any good? im ordering in some IRFP250's right now on ebay for like 5 bucks for 4
zker666 1 year ago
Comment removed
zker666 1 year ago
very very GOOD
vik95170 1 year ago
That's insanely close to your pc.... I wouldn't ever attempt such a project near such sensitive equipment...
weeardguy 2 years ago
that is sick ijust got one fly back from an old miniter
panzuman 2 years ago
woah fuck that looks complicated!!!
SmashCOBamberg 2 years ago
Whoa!! Can you audio modulated it?
afdhalatifftan92 2 years ago
Thats an insane power you got there
dtiydr 2 years ago
primary is 15 VAC??
08Kutt 2 years ago
Fantasitc.
miwgub 2 years ago
if you use 15 volt zeners instead of 12 you can use 470 ohm for over 35 volts
juniortore 2 years ago
can a flyback at 40 watts kill you if you accdenty touch it?
fatcow2323 2 years ago
no, it would hurt though. i dont think flybacks can kill you period. Dont take my word though. I know a flyback at 40 watts cant kill you, above 100 i dont know.
juniortore 2 years ago
Sounds a little small... Not nearly anough amperage from the sound of it. (@ 10 Kv, Apmerage = 0.004) I doubt you'll get any serious defibrillation unless you are pushing the thing right into your chest.
400 W on the other hand... Ow...
NichtDieseTone 2 years ago
Very nice! How's the flyback holding up? What voltage Zener didoes are you running? Did you find that running 12volters doesn't perform well with the higher voltage input?
-Sparrow
Sparrow338 2 years ago
Hi, The output is DC???
raulvideo 2 years ago
The flybacks in newer TV's have rectification. I'm pretty sure it's usually just half-wave rectification. However since these power levels and voltages are WAY above what the flyback is rated for I'd image the didoes can't stand the voltage and basically the transformer just puts out AC.
Sparrow338 2 years ago
sounds correct
juniortore 2 years ago
you die..
oliver2341 2 years ago
lol spider on the floor at 1:50.
punx8086 3 years ago 8
what type are the 2 diodes, what numbers?
juniortore 3 years ago
So, it is okay to put computer power supplies in series to gain more voltage without destroying it? (I have two identical PSU's)
Plasmana2000 3 years ago
I think you must remove the grounding of the power supply. As far as I know, then you can put them in series - but I'm not sure!
Coiltec 3 years ago
More powerful, but less compact. ;) Compare it with mine "secret weapon" that burning bright just on 80W power source.
Yuarez 3 years ago
dang, those look like mot arcs accept quiet
juniortore 3 years ago
why don't you make a singing arc?
ps cool vid:D and why so much stuff?
i thought u just need an ac adaptor and your sweet?
samssoftwareuser 3 years ago
he need so much things to provide the power needed to run the zvs driver at 700watts
jovicakluk 3 years ago 6
Hi, I did a ZVS today and the MOSFETS blew up right away in a very spectacular way, actually caught fire and burned with flames :)))
The thing is I used a very powerful toroidal transformer to power the circuit (26V) and normal, not FAST diodes. I also didn't have a heatsink, but it would have been useless anyway, they didn't blow up because of that.
What am I doing wrong ?
I posted a video about this, search please if u want for "ZVS Flyback Driver BLOWS UP".
Thanks !!!
SINEKT 3 years ago
my wires keep melting (negative side anyway because of internal rectification). what have you done to stop this from happening?
dannybeckett01 3 years ago
Use a bigger wire. The wire you are using is not a heavy enought gauge to support the load.
BTW:What do you mean by internal rectification, You're not talking about the damper diodes in the mosfets are you?
joyange1 3 years ago
@joyange1 no, I think he is talking about the diode in some rectified flybacks which suck. With rectified flybacks you can push a whole shitload in and get a little weak purple arc out. Also, even though it is a weak arc, it draws a lot from the primary, and that can stress the wire on the flyback so yes, go with an AC flyback and thicker wire on the primary.
juniortore1 1 year ago
@joyange1 I think he means from the interal diode on the flyback.
ubuntupokemoninc 1 year ago
how can you pump 700 volts when irfp250's are rated at 200 watts each
OceanBluiys 3 years ago
That 200 watts of power dissipation. That means how much power the device can resist and turn into heat. For example, Let say you turn it on at 50% and run 20v@10A(200W)(supply), that means your load is getting 10V@10A(100W) and the other 10V@10A(100W) is being absorbed by the MOSFET itself and dissipating that waste energy as heat. The IRFP250 can handle 200v@30A(6000W). At a full 30A load @ 8mOHMs (fully turned on.) that a 2.4 volt drop @ 30A equals about 72 watts of dissipation.
joyange1 3 years ago 2
ohhh i get it lol
OceanBluiys 3 years ago
just for closure ...
the main problem in ciruit design are switching losses, so if turning off the FET at full current wastes 0.01Ws of energy and the switching frequency is 20 kHz, then 200Ws per sec respectively 200W of power are dissipated plus 10-20W for on-resistance losses. The thing that makes the zero-current switching mode work so well is FETs being switched at zero current (hence the name). Got it? :)
hboy007 3 years ago
do you have to get all that stuff to get it runing?
RockeyDA 3 years ago
lol ur relly pushing ur flyback there nice job im going to try a rear projection on my zvs see if i can get that power if i evin go that high with any of my flybacks i get internal arcing and one time one of my flybacks exploded lol that was scarry..
Hungryhowiepizza 3 years ago 2
please can you tell how do you identify the feedback, primary coil and secondary base pins on a 15 pin flyback? please reply
SKarmytech 3 years ago
I would just use a ohmmeter and see witch pins have the hiest resistance(around 4 ohms).
FYI: For the ZVS driver, You need to wind your own primary coil as you can seen in the video the 2 red and blue windings on the flybacks ferite core. Its a 4+4 turn configuration. Look at a ZVS driver schematic for more infomation.
joyange1 3 years ago
i thought the lowest,
or was i thinking ronge?
couse my flyback working verry wel on the lowest pinns,
check my vid :P
zezimashock 3 years ago
please can you tell how do you identify the feedback, primary coil and secondary base pins on a 15 pin flyback? please reply
SKarmytech 3 years ago
how much Ma ont the hv side what is voltage
jovicakluk 4 years ago
that's a nice flyback video. Thanks for sharing with us
hboy007 4 years ago
That's very nice, how is the flyback going, is it hot? Most of the flybacks I found burn out at ~500W (they short out internally and sometimes burst in flames!)
jmartis2 4 years ago
What you need to use is a flyback from a rear projection tv, they are twice a big as one from a tv and 3 times bigger then that of a computer monitor. As far as getting hot goes, I could run it for about a 2 minutes before it got to hot to touch. Then I would shut it down and let it cool off.
joyange1 4 years ago
UMLTK: About 2 days after I shot this video, I was able to run it at over a 1100 watts (60V @ 19A). I wanted to take it up to 72 volts but the VDS on the mosfet was peeking at 192 volts and the max for the irfp250 is 200 volts. So i took a turn off the flybacks winding to make it a 4+4 turn, and that boosted the power without having to boost the voltage.
joyange1 4 years ago
FYI: The arcs only got about 1.5cm longer when I ran it from 700watts to 1100watts. I think most of the power went to heating the flyback althought I saw no clipping on the scope.
AWOW: I only ran it for about 10 seconds and then check the temp and althought it was cool to the touch at first about 5 seconds later it got super hot. The sec. winding got hot soo fast, that it took a few seconds for the plastic housing to conduct the heat to the surface.
joyange1 4 years ago
FN: I really don't know how far I can push this flyback, but I got this rule about electronics and that is, "If it's too hot to touch!, IT'S TOO HOT!!!".
joyange1 4 years ago
Thanks for the info, I once ran a flyback at 600W (video is in my profile) but just for a few seconds.
Too bad I can't see any rear projection TV's thrown away :P I have to use "multi-flyback" for more power (I once used a quad-flyback that gave 30cm arcs and it blew my driver :D)
jmartis2 4 years ago
"If it's too hot to touch!, IT'S TOO HOT!!!" I can very agree with you on this.
Aeryk333 4 years ago