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# Re: [femm] current density

- To: femm@yahoogroups.com
- Subject: Re: [femm] current density
- From: David Meeker <dmeeker@ieee.org>
- Date: Wed, 26 Jun 2002 12:25:45 -0400
- References: <20020625115048.95303.qmail@web20905.mail.yahoo.com> <3D188CD5.36DD1E4E@plix.com> <3D18981D.1020203@ieee.org> <3D189C14.D0DF47DE@plix.com>
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`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

``
``

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  - current density
    - From: mohamed karakache <mkarakdz@yahoo.fr>
  - Re: [femm] current density
    - From: Dave Squires <djsquires@plix.com>
  - Re: [femm] current density
    - From: David Meeker <dmeeker@ieee.org>
  - Re: [femm] current density
    - From: Dave Squires <djsquires@plix.com>

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