Re: Modeling the SG linear decay

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-uswest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Barry, Marco,

On 9 Apr 01, at 7:58, Tesla list wrote:

> Original poster: "Marco Denicolai by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <marco.denicolai-at-tellabs-dot-com>
> 
> Hi Barry.
> 
> Yes, I know those papers (I got two written by Mr. Dollinger). He uses
> an EXPONENTIAL decay law and is very satified in treating a large
> difference from measured to simulated waveform as a little one. I got
> better results than him to present :) I just would like to find a
> justification to them (e.g. someones paper pointing in the same
> direction).
> 
> I have to clean my Microsim sheet up in the next days and inform the
> list about it.
> 
> Best Regards
> 
> Tesla list wrote:
> > 
> > Original poster: "B2 by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <bensonbd-at-erols-dot-com>
> > 
> > Hi Marco,
> > 
> > > I would like to know if some of you is aware of the equation(s)
> > > regulating the SG V-I profile, or some approximation of them. That
> > > would be easier than to start digging in the library :)
> > >
> >     Look on Terry's site:
> > 
> > http://hot-streamer-dot-com/TeslaCoils/OtherPapers/Dolnger/
> > 
> > It contains a paper presented by R. Dolinger et al, at the 4th IEEE
> > Pulsed Power Conference.  A theory is proposed for the linear decay
> > accompanied with a mathematical equation compared to measurements
> > from a real system. This may be considerably improved upon by the
> > tssp list findings.
> > 
> > Cheers,
> > 
> > Barry

I don't see any attempt in those papers to model the gap correctly. 
When considering k of 0.6 it actually doesn't matter but it certainly 
matters for a typical loosely coupled TC (0.1 - 0.2). I would say 
that is where our concern lies. I wrote a piece several years ago 
analysing the implications of the linear decrement and posted it to 
the list several times. It should appear under the heading "Primary Q 
- a brain teaser". It pointed to a clear direction for primary design 
- a high capacitor voltage and high primary inductance for best 
transfer efficiency.

Malcolm


> -- 
> _____________________________________________________________
> 
>  Marco Denicolai           Senior Design Engineer 
>  Tellabs Oy                tel: +358 9 4131 2769
>  DSL Products              mobile: +358 50 353 9468
>  Sinikalliontie 7          fax: +358 9 4131 2410
>  02630 Espoo  FINLAND      email: marco.denicolai-at-tellabs-dot-com
> _____________________________________________________________
> 
> 
> 
>