Re: Off Line - DRSSTC (OL-DRSSTC) Concept - 2.0

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Robert Hanford" <pomnept@xxxxxxxxxxx>

Hi Terry,
I find this new concept you are working on  very exciting and now 
believe that someday I will actually build a nontraditional Tesla 
coil. The schematic looks so simple that even "I" could build one. 
Please keep up the great work!!!!!

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, September 25, 2005 5:40 AM
Subject: Off Line - DRSSTC (OL-DRSSTC) Concept - 2.0


> Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi All,
>
> I played with computer models today and had a few changes to the concept.
>
> http://hot-streamer.com/temp/OL-DRSSTC-02.gif
>
> 1.  I think bi-directional transorbes can replace the Zener/Schottky 
> pairs so only one device is needed instead of four on the IGBT gates.
>
> 2.  The old trigger circuit did not work well, so I added a whole 
> new trigger circuit.  It is a MOV in series with a SIDAC and a 
> current limiting resistor.  The SIDAC could fire at say 20V and make 
> a nice sharp current pulse to start the system.
> The separate trigger current loop wire is simply strung though the 
> CTs along with the primary wire.
>
> I think to begin, one should just charge Cdrive (name changed from 
> Cresonant since that caused confusion with Cprimary) with a DC power 
> supply.  The resonant charging thing is sort of trick and the other 
> issues need to be worked out first.  The trigger circuit could also 
> be easily fiddled with for testing.
>
> One problem modeling suggested is that it does not like to turn 
> "off". Once the oscillation is started, it tended to start pulling 
> current directly off the AC line.  I think fiddling more with Lblock 
> can solve that.
>
> Modeling did show that it "loves" to run and found no basic problems 
> with the topology.
>
> I should not that this is all theory and has never been tested in hardware...
>
> Cheers,
>
> Terry