Re: The RAT coil.

["Tesla list" <tesla-at-xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> 

Finn, all,

The overshoot is interesting. The cap continues charging to a higher value then
when it finally discharges, the later portions of the ringdown continue
outward.
You can see the ripple on your screen. I wonder if this poor quenching on these
particular points?

Bart



Tesla list wrote:

> Original poster: "Finn Hammer" <f-hammer-at-post5.tele.dk>
>
> Richie, all
>
> Those flats,(which are the same flat, really, symmetric on each
> halfphase) Have me baffeled too, something that I had not expected at
> all. From simulations I had expected this:
>
> http://home5.inet.tele.dk/f-hammer/msim.jpg
>
> The overshoot before the break at 2mS is also unaccounted for. I guess
> that it has to do with some peculiarity of the MOT`s, and I am
> speculating that these beasts actually are wound on a core that has some
> sort of square hysteresis curve or something. This could perhaps be
> tailored to the application in the oven, and also explain why they
> perform so well in tube coils. They are sort of peaky in responce.
>
> Cheers, Finn Hammer
>
> Tesla list wrote:
> >
> > Original poster: "R.E.Burnett" <R.E.Burnett-at-newcastle.ac.uk>
> >
> > Hi Finn,
> >
> > This looks like a very flexible Tesla Coil,  and is beautifully built too.
> > It should provide an excellent test bed for your research,  I wish I had
> > one !
> >
> > I did some work with uneven spaced firings,  and the ability to adjust
> > each firing point in real time is so valuable because there is a lot
> > of interaction between each firing.
> >
> > I took a look at the charging voltage waveform shown on your page:
> >
> > http://home5.inet.tele.dk/f-hammer/charging.jpg
> >
> > The two flat portions in the trace are seem unusual.  I have never seen
> > this behaviour before,  and I usually have the scope connected when I run
> > my coil.  Do you have any idea what is happening in these periods where
> > the voltage is almost constant ???
> >                                                         Cheers,
> >
> >                                                         -Richie,
> >
> snip