Three coils DRSSTC

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

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