Re: [femm] current density

[David Meeker <dmeeker@xxxxxxxx>]

Well, you could always apply a "circuit property" to each coil region. 
This is just a constraint on the total current carried by a coil. For 
magnetostatic problems, it effectively chooses the current density to be 
whatever it has to be to get the right total current.

Dave Meeker

Dave Squires wrote:

> Dave,
> You are right of course.
>
> But, the problem I have run into is where you have odd shapes
> that perhaps are not symmetrical and the areas don't match.
>
> In particular with a toroid type winding, it is nearly impossible
> to get the inner winding area to match the outer winding area.
> If you try to use area current densities it is a nightmare and
> you can't get the two to sum to zero without a lot of pain
> and frustration.
>
> So it is much easier to just use point properties and the
> same number of points to represent real coil winding turns.
> Then the sum is always zero with no headaches.
> At least this is what I have found from experience.
>
> Regards,
> Dave Squires