Re: Three phase TC

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

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

In a message dated 7/14/01 2:28:14 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

> HOWEVER, Jim's idea may actually work for disruptive systems - by using
>  precisely triggered spark gaps on three independent (but otherwise
>  identical) coils. A triggered spark gap, when properly set up, can be
>  repeatably triggered with relatively little jitter (~10-20 nS). If we use a
>  lower operating frequency for the coils, the effects of this jitter can be
>  further reduced. In the example Brian provided, a sequence of high voltage
>  trigger pulses, each separated by 1.67 uSec, would be sufficient to
>  initially time-phase the three systems by 120 electrical degrees. However,
>  it's not clear that this phase relationship will be maintained once
>  significant energy begins to be exchanged between them... 
>  
>  Best regards,
>  
>  -- Bert --

Bert, all,

The triggered gap idea may be good for what Lou Balint is working
with also.  Lou uses two power supplies, tanks, rotaries, and 
secondaries, and uses these to feed a single magnifier secondary.
Because of the rotary timing jitter and impreciseness, he has
to fire one gap, then the other right after it, both near the 60HZ
AC peak, rather than firing both at the same time which gives
random RF phasing and poor spark output (120 bps).  The 
triggered gap idea may let him fire both gaps at the same time 
at the 60Hz peak, keeping the RF from both units in phase. 
The two units would need to be well tuned to the same frequency
to remain in phase during a bang.  Of course his
original purpose was to use 3 power supplies,
etc, and run each off one phase of a 3 phase supply, in which
case the RF phases don't matter.  His purpose in doing this
is to permit a huge coil to be built, using smaller components,
if the larger components are too expensive, or not available, etc.

Triggered gaps are something I'd like to experiment with.

John Freau