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Re: The Next Coil
From: Greg Leyh[SMTP:lod-at-pacbell-dot-net]
Sent: Friday, August 01, 1997 5:25 PM
To: Tesla List
Subject: Re: The Next Coil
Tesla List wrote:
> >I do believe that DC Tesla coils are inherently more efficient for two
> >reasons:
> >
> > A) Better power factor
> >
> > B) With DC, _every_ firing of the primary ckt is at full energy, keeping
> > the streamers continuously ionized
> >
> > -GL
>
>
> Greg,
>
> Do you think that the use of AC along with a synchronous gap would
> match the DC efficiency? Maybe 120 BPS is a little slow, but using
> 3 phase AC with a sync gap, 360 BPS would be obtained and may
> be good?
Hmmm... It's true that the '3 phase - sync gap - 360 BPS' system would
have a better power factor, but such a scheme would require three
primary capacitor banks and a rather novel commutating arrangement on
the rotary gap. I wrestled with this design choice on my present coil,
and decided that a diode set would be easier to deal with than three
primary capacitor banks and a three phase rotary gap. It's also very
convenient to control the thruput power using the rotary gap speed,
which eliminates the need for high power variacs.
-GL