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ARC STARTER couppling

Discussion in 'Electronic Design' started by [email protected], Feb 17, 2008.

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  1. Guest

    I'm currently building a complete WIG/TIG welder... microcotroller PCB
    is runing and will be programmed probably next year (takes some
    time ;-)
    Currently I'm working on the arc starter.
    I found an television high voltage transformer which has its resonance
    frequency at 310kHz.. .I don't know why, but thie high frequency
    I get 3..4 cm at 12V and 2A... really lucky about that.
    But I still failed to make the couppling from HV-side to the LV
    welding lines.
    There are several pictures available in the web with eg 20:20 turns...
    every link says ... its running perfectly.
    Here how I tried...
    make 20:20 turns air coil with a diameter of app. 15mm...
    connect one HV wire directly,
    the second with a 1cm gap (no cap!)
    No I was assuming to get a nice HV on the secondary side, but I get
    What is missing?... and why??
    Please be so kind and tell me you opinion
    If you have good links/suggestion... please post it
    You can also write to
    If I get good suggestions, I will summarize everything here.

    Thanks and have a nice day

    Best Regards

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