Re: Question?

To: tesla-at-pupman-dot-com
Subject: Re: Question?
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
Date: Thu, 10 Dec 1998 11:35:32 -0700
Approved: twf-at-verinet-dot-com

to: Scott

The central problem here is "defining suddenly".  The large counter EMF
will try to keep the current going and prevent the fast L di/dt transition
required for HV production.  A solid state system would probably work but
doing it mechanically would be difficult as early induction coil
constructors discovered.

DR.RESONANCE-at-next-wave-dot-net


----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Question?
> Date: Wednesday, December 09, 1998 11:49 AM
> 
> Original Poster: Scott MacGregor <smacgregor-at-aasp-dot-net> 
> 
> To the list,
> 
> Does anyone know the formula for calculating the reverse voltage and
> current levels delivered from a MULTI-LAYER coil after a steady state DC
> voltage applied to the coil is suddenly interrupted? (if the coil is
> able to discharge through a spark gap) I hope I'm stating this properly.
> Example:12VDC battery across an air core coil consisting of 20 layers of
> #20 copper 2" D (average) and 6" tall. Break the battery connection
> suddenly and provide a .025" gap in its place.  
> -- 
> Regards,
> 
> Scott MacGregor
> 9 South St.
> Plainville, MA 02762
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