Re: Stroke of brilliance?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

No it is not complicated ! That is what a diode dose in a dc circuit.
Another way to do that is to put a bridge rectifier in the ac line to the
transformer secondary output with a SCR shorting the dc bridge
connections.When the SCR is triggered AC flows through the shorted bridge.
when the ac reaches "O" after the trigger the SCR opens the circuit. That is
how a solid state relay works.
  Robert  H 

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Tue, 29 Jan 2002 00:00:09 -0700
> To: tesla-at-pupman-dot-com
> Subject: Stroke of brilliance?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Tue, 29 Jan 2002 02:14:06 -0700
> 
> Original poster: "Sean Taylor by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <taylorss-at-rose-hulman.edu>
> 
> I just had an idea . . . it might be able to go somewhere, but is probably
> just
> a lot of extra work to accomplish not a whole lot.  Anyway . . .
> 
> In TC operation, there are huge voltage peaks that can go back into the
> transformer from the primary tank oscillations.  Filters do reasonably
well at
> protecting the transformer, but don't entirely.  So - I was thinking about
> disconnecting the transformer while the spark gap was firing - yes, 120 times
> a
> second.   I was thinking about a rotary spark gap, and thought about changing
> the conducting areas and "blank" areas, such that when the spark gap is
> firing,
> the transformer would be disconnected from the circuit.  I.E. there are two
> spinning disks on one shaft, one with bolts going through it on 2 or 4
> locations, the other with metal all the way around, except in those 2 or 4
> corresponding locations.  So most of the time, the transformer would be
> charging the tank capacitor, then it would be disconnected just before the
> electrodes lined up to fire the spark gap, then a few microseconds (~400 or
> 500) later (to allow for ringing to die out), the metal would come back for
> the
> transformer to start charging the tank capacitor again.  I know it's pretty
> complicated, but it would allow for isolation of the transformer and the tank
> circuit, and probably allow a more efficient energy transfer to the primary,
> with less damping.  Any thoughts/comments/ideas?  I'm working on building a
> SRSG right now, with a fairly small motor (1/8 HP), but maybe i'll get a
> bigger
> motor soon, and try it out.  This would all be easiest on a 3600 RPM
moter, at
> 120 bps, so there would be many less transitions to worry about - only 2 per
> revolution.  BTW - if this ends up working well, I've got rights to it :-)
> 
> Also, in case of incomplete discharge, would it be better to put a full wave
> rectifier on the output of the transformer so that any leftover charge
> wouldn't
> fight the transformer, but aid it instead?
> 
> Also, thanks to everyone who helped with the instructions for converting a
> motor to sychronous - it worked wonderfully.
> 
> 
> ---------------
> Sean Taylor
> The Geek Group
> G-1 #1204 
> <http://www.thegeekgroup-dot-org>www.thegeekgroup-dot-org
> Because the Geek shall inherit the Earth!
> 
> 
> 
> 
> 
>