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Re: [femm] how do I model a torroidal transformer ?
Brain dead here, that's set to median thickness,
But instead of point currents which take a lot of time to
draw in, how about more curves and then use the "circuit"
properties. That way you automatically get inductance per
turns squared.
- Robert -
On Mon, 25 Aug 2003 10:04:51 -0700
Dave Squires <djsquires@xxxxxxxx> wrote:
>
>
>
>
> Come on guys. This is easy.
> The attached file shows you how to do this.
> Remember this is static, not dynamic. But this
> will work fine for getting the field. This would
> be a no load condition. For a loaded case you
> would have to calculate the rate of change,
> figure the voltage induced and the current based
> on the load. Depending whether the field is
> rising or falling in the primary you can determine
> the Lenz reaction polarity accordingly to oppose
> or assist the primary drive. I will leave that
> up to the user to handle all the other details.
>
> The main trick is to use point currents for the
> coil windings. Just run the attached file.
> David Meeker can fill you in on any other way
> to do this. But this is one way.
>
> DRS
>
> robert Macy wrote:
> > The torroidal transformer *is* axisymmetric, but
> when drawn
> > that way the currents go around the small circle and
> the
> > magnetic field is perpendicular to the page. I
> don't think
> > femm solves this situation.
> >
> > Instead and approximation is to draw the cross
> sectional
> > view in x-y form and set the total length to the
> median
> > circumference.
> >
> > The "crunching" of the field at the inside
> curve won't show
> > up, but it will get you started.
> >
>
>
> - Robert -
> >
> > On Mon, 25 Aug 2003 03:16:32 -0000
> > "Dr Mark Snoswell"
> <mark@xxxxxxxxxxxxxxx> wrote:
> >
> >>
> >>
> >>
> >>How do I model the field of a torroidal
> transformer? ...
> >>it's axi
> >>symetric but I can't quite see hwo to model it.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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>
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