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First zvs driver+induction coil/heater HOT! please help

  1. Feb 20, 2013 #1
    I am making my first zvs driver and when I got it "finished" all it did was get my inductor and mosfets hot, the screwdriver I had in the heater did nothing. I killed the power before any damage was done, I hope. My mosfets are 2 IRFP250n's and im powering it with a 12V 4A battery charger. My capacitor is from a microwave, 0.80μf and 2100V AC, is this too big?

    I am new to most of this so just assume I know nothing. I won't be offended.
    I am open to all suggestions and will put a few pics up tomorrow.

    7a07a326ac721757eca7f9500f62824b779980e9e98bceaba15d3ea45b74ecf06g.jpg

    660fda9845e949da57a638072067283042bc902c67c67026d89a8df3b092cf296g.jpg

    a796b5b61699b25e0567d585195c4cb734f42267f32678aa835ac8faf1b828266g.jpg
     
    Last edited: Feb 20, 2013
  2. jcsd
  3. Feb 20, 2013 #2
  4. Feb 21, 2013 #3
    Ok my caps came in the mail today so I switched the monster cap for 3- 1μf 250v in series. My inductors are no longer getting hot but the caps get a "little warm" and the mosfets still get HOT. I can tell its working now though, got a piece of a coat hanger up to 100F but the mosfets were way hotter so I killed the power.

    Other than heatsinks(I'm waiting for my thermal grease) is there something I can change to keep the mosfets from burning up?
     
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