Re: Permanent magnet Tesla coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Brady Hauth <bhauth@xxxxxxxxx>

D'oh, I didn't check Wikipedia!

http://en.wikipedia.org/wiki/Alexanderson_alternator

Your idea is closer to how it worked.


>  > Thinking about the original idea some more I figured that one might be
>  > able to work such a system by using a ring of magnets inside the inner
>  > diameter of a toroid wrapped with wire that switches direction every
>  > turn.
>
> Instead you could base it on this idea:  If you stick a "C" shaped piece
> of iron across a bar magnet, you short it out.
>
> So, line up some parallel rows of bar magnets on the surface of a wood or
> plastic cylinder, with spaces between them all, and with the magnets
> oriented to form one huge magnet.  Spin this device inside a hollow iron
> pipe, so the pipe shorts out the flux of each magnet.  Cut slots in the
> pipe so the passing slots remove the iron shorting bars.  Perhaps stick on
> some iron tabs which pass between the magnets in series, making them
> stronger.  As the iron pipe rotates, first the slots line up with the
> magnets AND the iron tabs go between them end-to-end (so the array becomes
> one huge and powerful magnet.)   Then the tabs move out again and the
> slots move away, so each magnet is shorted out by the iron pipe.
>
> Use a big pipe and put 100 parallel rows of magnets on the cylinder, and
> you get 10,000Hz output when the pipe rotates at 100Hz.
>
>
>
>
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