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How do I calculate the high voltage transient?

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  • How do I calculate the high voltage transient?

    I want to power a miniature tesla coil using the short duration, high voltage transient created when the current powering an inductor is shut off. I'm hoping to get the a voltage high enough to jump a spark gap or perhaps a high voltage diode; to make the pulse unidirectional.

    Can anyone tell me how to calculate the high voltage transient created when power is turned off to a coil?

    How can I generate the highest possible potential spike?
    A short duty cycle and very rapid shut off. Device suggestions? Transistor part#?

    Iron or air core? Higher or lower inductance? I would think a very long air inductor would be best. Is this correct? Is a single layer or multi-layer coil best? Is a flat coil better for higher voltages spikes? I have noticed that a bifiler wound coil wired in series has a lower resonant frequency than a normal coil, but the same voltage transient created when its shut off.

    I would love to hear any suggestions you can offer.
    Last edited by DandDMan; 09-02-2007, 05:13 PM.