 EMI reduction inductor?
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Steve Conner
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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
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Using the fundamental resonant frequency is wrong. You should use the resonant frequency of the ground arc channel with the toroid capacitance, which is something like 50MHz.
If you do this you will see that the peak current in a ground strike can be hundreds of amps and even a small inductance will limit it greatly.
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dex
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Registered Member #2566
Joined: Wed Dec 23 2009, 05:52PM
Location:
Posts: 147
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Steve Ward wrote ...
You are basically expecting it to withstand a ~1/4 to 1/2 of the TC output voltage for a uS or so (depending on the L of the inductor and C of the topload).
How did you come up with these figures? I would expect even a small inductor to be stressed by at least 1/2 of the max TC output voltage when sparks attach to the ground...
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