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Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
tonight i wound 150 turns or 30g wire around a ferrite core very similar to 5kv psu supply. i wound it in 4 layers, 1st 60 turns 2nd 40 turns 3rd 30 turns and 4th 20 turns with each layer covered with electrical tape. with a 10 turn primary and 6v in i got around 2kv out. I am a little concerned about pushing the input to 12v because of internal arcing and i was wondering if this would be a problem and if i should dip it in varnish or something or if i insulated it inough that it would not be a problem.
Registered Member #599
Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
I have done few experiments with homemade smps HV transformers and i think it is almost impossible to make decent insulation between winding layers. I have tried various plastics, epoxies, cast resins etc and they all fail sooner or later. Single layer coil is way to go.
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homemade hv transformer
