40kV ZVS fly-back driver
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Uploader Comments (pekarj)
All Comments (37)
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@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.
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more than 28 V produce sparks that big, but when sparks off all my ground pin was burned
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@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. ^_-
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i HAVE A OLD FLYBACK. the (48V) arcs start 3" i think it is about 70kV
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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.
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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)
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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
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oh insulated they are...
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"insulated" mofo
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Why isolated gate bipolars? arent MOSFETS better for power switching like that?
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i have one flyback from an old black and white monitor, and you could say it's tiny but it gives big arcs. maybe 50 kV , I know nothing special... but the interesting part is i don't know whoch is the negative leg. the spark shots of 5 diferente pins and it's the same length
What should i do?
izidor7 3 years ago
Simple, find pin which gave you longest arc :). This is normal because these fly-backs contains many coil windings (back coupling, etc...).
pekarj 3 years ago
Name of the transistor please?
Nikhilvalsalan 3 years ago
Its IRFP250, and now im using the HGTG30N60A4D IGBTs...
pekarj 3 years ago
Again, very nice. Thank you for posting it.
Aeryk333 4 years ago
See my video "Extra Power HV ZVS driver 40kV" for bigger arcs :D
pekarj 4 years ago