Re: Three coils DRSSTC

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

Original poster: humanb-at-chaoticuniverse-dot-com 

Liviu, this is really cool! I have felt that there is such a dangerous 
amount of current and voltage in the primary of a DRSSTC, its a wonder they 
work with out blowing up. But this way you are "isolating" the bridge from 
the resonant circuit, wow! So, what do the engineers here think? Any 
detractors?

Regards,

David Trimmell

On Mon, 27 Sep 2004 11:13:39 -0600
  "Tesla list" <tesla-at-pupman-dot-com> wrote:
>Original poster: "Liviu Vasiliu" <teslina-at-yahoo-dot-com> Hi
>Sometime ago, on tesla list, we discussed about some
>special HV transformers with 3 windings (primary,
>secondary and a third coil which forms a resonant
>circuit with a cap connected to its ends). This made
>me think if this approach would not be usefull in a
>dual resonant coil. The benefits would be:
>- free ringing at low resistence in the resonant
>circuit, feeding the streamer with more energy, after
>the primary (driven by an interrupted SSTC) stops
>conducting.
>- overcurrent protection for the bridge components,
>which would not be stressed by the high currents
>circulating in the resonant winding.
>So, I built a messy prototype TC which gave some good
>results ( +40% spark lenght increase with the resonant
>coil versus simply interrupted SSTC).
>The schematics and pics are here:
>http://www.geocities-dot-com/teslina/3cdrsstc.html
>The project was a result of the "necessity" because
>the high current IGBTs dont live on this land..
>Maibe this approach is a way to go..
>teslina
>