Electrostatics: Corona Motor, Dirod, NE-2
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Uploader Comments (TinselKoala)
All Comments (19)
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Good !
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@TinselKoala Cool, thanks for answering.
(have you seen Instructables-dot-com? This would go down a storm there.)
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Sorry, correction, the caps were IN for the motor demo and after I zapped myself I took them OUT for the NE-2 demo, to get dimmer but more frequent flashes.
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Yep. The caps are 400 pF 30 kV doorknob transmitter caps, basically just a solid chunk of barium or strontium titanate with electrodes and insulation. They are in 3s-3p stack, so if I did the math right that still gives 400 pF but raises the standoff voltage to 90 kV, nicely above the max voltage of the Dirod. But I have seen it spark across the stack on occasion... dust or hair maybe.
It's enough to startle -- as you see -- but not to kill. 15 J across the chest....maybe different.
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@TinselKoala so many caps & only 400pf? That would be 0.198J @ 30kV, not very much...
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Sure... I put them there.
For the motor demo I had them out of the circuit, but then I put them in (the fiddling with the knobs) for the NE-2 demo... and that's why I got shocked, the 400pf or so at 30kV packs a bit of a jolt.
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@rocketman221projects It's a Dirod, of the basic Moore design with some TK mods. It can reach 60 kV on a dry day.
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@TheLangfords I gnawed it out of plastic and brass and aluminum with my bare teeth.
Just kidding! I used a lathe. The Moore's Dirod electrostatic generator general design is available on the internet in many places. If you compare my Dirod with the published designs you will see a few differences; they aren't really significant, except that carbon fiber makes better brushes than anything else I've used or seen tried by others.
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@TinselKoala bud did you see the battery of capacitors on the generator?
1:11
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so how many rpms..
and.. have you tried magnets on this???
josephdupont 1 year ago
@josephdupont I've measured over 12000 rpm on this motor and much faster on others. The currents that electrostatic machines produce are so low that their associated magnetic fields are very weak. They can be detected, but they aren't really useful in interacting with permanent magnets. So sure, I tried magnets in various ways but I never noticed any special effects from them.
TinselKoala 7 months ago