Half bridge induction heater issue

Discussion in 'The Projects Forum' started by ajrenzetti, Oct 14, 2011.

  1. ajrenzetti

    Thread Starter Member

    Dec 20, 2010
    40
    0
    I finally got my half bridge inverter to work without exploding. When i turn it on, the signal on the tank circuit side is in ac, although i cannot seem to make it sinusoidal(tuned). it is, however, pretty close. when i put a metal rod in the coil, nothing happens. it doesnt even start to get warm. i know i am using a rather low voltage compared to other induction heaters, but wouldnt it still work at this voltage? Is it because the circuit is not fully tuned? should i use a different driver(not the ir2111)? ive included a picture of the schematic.
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Let me restate that. You CANNOT drive N-channel mosfet on the positive rail like that. It will never fully open, thus no power in your coil.

    And please refrain from creating multiple threads on the very same topic. I suggest either merging the two or closing the old one.
     
  3. ajrenzetti

    Thread Starter Member

    Dec 20, 2010
    40
    0
    sorry, i figured since they were 2 different configurations they could be posted as two separate threads instead of one.
     
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