Re: Multilayer secondary solution to SIGS, DRSSTCs, and OLCTs

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Josh,

At 07:54 PM 11/3/2006, you wrote:
> In reading that SIGS have a low Q that could decrease performance so 
> why don't you just wind more than one layer on the secondary and 
> just have like two layers of varnish and connect however many coil 
> layers you wound in parallel. The resonant frequency stays the same 
> but it seems that you wound the coil with thicker wire resistance wise.

The secondary impedance is typically like 40,000 ohms so the primary 
copper wire resistance (~200 ohms at 150kHz) there is not a factor at all.

> You could also inplement this on OLCTs and DRSSTCs to acheive even 
> lower frequencys without the extra resistiance. It could also be 
> inplemented on classic Tesla Coils. The only drawback would be the 
> extra work but it wouldn't be to bad. All my info on this is from 
> the tesla list archives.

For the SISG, the IGBT resistance is the major factor.  Each IGBT is 
about 0.02 ohms (although that seems to go significantly lower...)

For the OLTC,were primary resistance is a big deal, as well as super 
low inductance, we have used parallel primary windings:

http://hot-streamer.com/temp/OLTC08-17-01.jpg

http://www.scopeboy.com/tesla/t4primarytest.html

I could not find a link, but Finn Hammer recently made an OLTC 
primary that I am sure is responsible for world copper prices going up :o))

Cheers,

        Terry


> Josh