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RE: Big Toroids, collective conscious brain storm



Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Jim,

At 05:50 PM 9/12/2006, you wrote:
Terry,

You did quite a lot of electrostatic modeling. How important is the actual
complete toroid considering the inside is a flat plane generally?

Not too important. Here is a toroid with a center flat plane but the outside edge is only a half circle:

http://drsstc.com/~piranha/PIRANHA/HoopToroid-01.gif

http://drsstc.com/~piranha/PIRANHA/HoopToroid-02.gif

The main voltage stress is still in the usual place on the outer 1/2 of the toroid surface.

If we remove the center completely as if the outer edge were suspended by three spokes we get:

http://drsstc.com/~piranha/PIRANHA/HoopToroid-03.gif

http://drsstc.com/~piranha/PIRANHA/HoopToroid-04.gif

The sharp top edge of the toroid is now a bit of a concern must most of the stress is still to the outside. If we look at a pure voltage plot:

http://drsstc.com/~piranha/PIRANHA/HoopToroid-05.gif

We can see that there just isn't anyplace for a spark to go inside the toroid. the outer surface does all the work and the rest is just expensive metal bending.

Cheers,

        Terry