RE: Primary magnetic field plots

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>


As you can see from this photo, my MOT is well away from the coil, both
underneath and to the side.  And it still used to get smokin' hot after
running the coil.

http://www.easternvoltageresearch.com/oldwebsite/images/vttc01_assembly10.jp
g

However, perhaps the field looks a bit different with a solenoid coil vs.
the pancake.

Anyways, regarding the "paid" version of Maxwell 2D, i own it, and its no
better than "free" version - same sucky interface, with just a few extras.

Note, that you can import .dxf files etc... into Maxwell 2D which makes
modeling quite a bit easier.

Dan




> The big fields stay vastly closer to the coils than I thought
> too!!!  Maybe Dan's hot MOT got "too close".  I imagine once you get
> inside the danger zone, things get hot fast!!
>
> Cheers,
>
>          Terry
>
>
> At 06:52 PM 7/7/2006, you wrote:
> >Very cool Terry! Sucks however (slow dial-up and 35MB). I'll have to
> >wait until Monday and download it at work. Looks like a fun tool.
> >The field is more "compacted" around the rings than I had envisioned
> >(the magnified gif is what I expected). I guess now a matter of
> >knowing the field strength reaching down to the MOT. The MOT's
> >influence under power is yet another source of EM and the
> >interaction will be interesting.
> >
> >Thanks for the Maxwell 2D source.
> >Take care,
> >Bart
> >
> >Tesla list wrote:
> >
> >>Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
> >>
> >>Hi,
> >>
> >>For my little SISG coil, I got the Ansoft Maxwell 2D thing going:
> >>
> >>http://www.ansoft.com/maxwellsv/
> >>http://coolmagnetman.com/basic_user_manual.pdf
> >>
> >>Here are the flux lines of the coil set up with the MOT under the
> >>coil and a fan to the right side:
> >>
> >>http://drsstc.com/~sisg/files/SISG-coil/Field-Flux.gif
> >>
> >>Very few flux lines make it up to the top terminal and the aluminum
> >>fan seems to be transparent to magnetic flux.  The big iron
> >>transformer bends the lines around.
> >>
> >>We then can look at the B field (in Teslas ;-))
> >>
> >>http://drsstc.com/~sisg/files/SISG-coil/Field-B.gif
> >>
> >>The transformer attracts some of this field and is energized by it
> slightly.
> >>
> >>The plot of field energy is where the "power" is at:
> >>
> >>http://drsstc.com/~sisg/files/SISG-coil/Field-Energy.gif
> >>
> >>The power stays "very close" to the primary coil turns.  That is
> >>why those big metal things in the area of the primary do not affect
> >>things much.  If we increase the sensitivity, we can see more detail:
> >>
> >>http://drsstc.com/~sisg/files/SISG-coil/Field-Energy-1.gif
> >>
> >>The energy still clings very close to the primary but you can see
> >>it touching the secondary now.  If we really turn up the
> >>magnification, you can see the transformer having a tiny effect:
> >>
> >>http://drsstc.com/~sisg/files/SISG-coil/Field-Energy-2.gif
> >>
> >>Sort of cool!!
> >>
> >>Cheers,
> >>
> >>     Terry
> >>
> >>
> >>
> >>
> >>
> >>