40kV ZVS fly-back driver

[Alex1M6]

@izidor7 Is it grey in colour? If so I have one of those and have found that the HV return is common to a number of different pins. I am not sure if it was designed like this or I have over driven it that breakdown has occurred between windings.

[TheLightningStalker]

@izidor7 You need about 100V and a test light. Use a small bulb because the secondary winding is very fine. You could also use an ammeter and see which one gives the most current. Better still is to wind you own transformer. ^_-

[08Kutt]

i HAVE A OLD FLYBACK. the (48V) arcs start 3" i think it is about 70kV

[coolaidkiller101]

when i arc the hv out on the transistor heat sink it makes a buzzing sound usally loooks purple and turns yellow /orange on transistor

[weeardguy]

It sounds like you have corona discharge all over the place: insulate wires with HV-insulation, or cover them in epoxy resin of some sort (normal candle-wax also works, but only when the component stays cool)

[devosbi]

If you are referring to the screech it makes sometimes, that's normal.

The circuit is a resonant ZVS, the screech you hear is the resonant frequency oscillating on the secondary as it's driven by the primary.

[juniortore]

is this the mazzilli driver coz i know those drivers are powerful.

[voon100]

Impressive arc. It appears you have a pretty high current transformer to power the flyback. I reckon the power transistor get pretty hot.

Check out my Flyback Transformer.

[juniortore]

wow thats good for a single transistor driver

[juniortore]

is this a mazzilli driver

[pekarj]

Simple, find pin which gave you longest arc :). This is normal because these fly-backs contains many coil windings (back coupling, etc...).

[hyparh]

Try to drive a small TC with it. I will with mine. :)

[pekarj]

Over 28V ? :D see my other videos, where this ZVS is powered by 45V 20A

[alfareifaldy]

more than 28 V produce sparks that big, but when sparks off all my ground pin was burned

[Desaster6]

Hört sich krass an

[Nikhilvalsalan]

Name of the transistor please?

[pekarj]

Its IRFP250, and now im using the HGTG30N60A4D IGBTs...

[akkudakkupl]

Why isolated gate bipolars? arent MOSFETS better for power switching like that?

[spinctah]

"insulated" mofo

[akkudakkupl]

oh insulated they are...

[Nikhilvalsalan]

I think most of em are noisy but u cant hear it because the mic of the d-cam does not respond to ultrasonic sounds.

[juniortore]

witch transistor is this

[SKarmytech]

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

[HLSDK]

wind your own feedback. Primary will have a DC resistance of about 1 ohm, maybe a bit less. The pins are usually nect to eachother

[SKarmytech]

thanks for the info

[phazonxl]

nice! this is the best I've seen in a while.

[98209276]

which mosfet would work similar to the IRFP250 out of these: IRF520 TMOS,IRFP450 HEXFET, PHP6N60E MOSFET,SSP60N06 MOSFET ,MTP3055E TMOS

[zapper7]

That's a nice current draw for only 20V in, mine takes like 35V to get arcs like that. You should try a high-resistance voltage divider (like 1000:1) to measure the final output voltage. Estimating it by ignition distance is no good.

[hboy007]

that's nice but judging by the distance it takes the arc to fire that's not 40kV. It looks impressive because of the high current involved (which keeps the drawn arc burning). Altogether nice work :)

[killer1479]

hey pekarj

cool vid

many thanks for sharing with us

[DizzzyKipper]

Nice arch

[jmartis2]

Put some "spacers" between the two core halves, this will get rid of the screeching sound ;)

[pekarj]

See my video "Extra Power HV ZVS driver 40kV" for bigger arcs :D