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# Re: [FEMM] bc mistake??

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- Subject: Re: [FEMM] bc mistake??
- From: "robert Macy" <macy@california.com>
- Date: Mon, 29 Dec 2003 13:00:28 -0800
- In-reply-to: <web-60797732@california.com>
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    I responded before I looked at your file.

    Your segments don't match.

    You have no matching edge for ap3 that I could find.

    The aluminum cuts the segment line in half and the line
    segments can't be the same.

    Also, check the polarities of your current in the windings.

                      - Robert -

    On Mon, 29 Dec 2003 10:01:09 -0800
     "robert Macy" <macy@california.com> wrote:
    > I also had a difficulty with using the antiperiodic to
    > replicate a structure.  The analyzed result kept giving
    > me
    > zero magnetic field at the boundary when I knew there
    > should be a strong field coming in one side and exiting
    > the
    > other (perhaps, I did not understand the exact meaning of
    > the boundary condition).
    >
    > However, I solved my problem by placing a magnetic
    > "short"
    > around the structure using nonconductive material with a
    > relative permeability of 1,000,000   That gave me the
    > effect I needed and did not take much overhead in mesh.
    >
    >                      - Robert -
    >
    > On Sat, 27 Dec 2003 19:19:48 -0800
    >  "Polychronis Vallianatos" <rotechen@otenet.gr> wrote:
    > > Dear Collegues,
    > > trying to learn how to model an electric motor, but
    > there
    > > is a mistake in the anti periodic boundaries
    > definition.
    > >
    > > Pls help!
    > >
    > > The Best for the New Year!
    > >
    > > Chronis
    > > pvallian@yahoo.com
    >
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- References:
  - Re: [FEMM] bc mistake??
    - From: "robert Macy" <macy@california.com>

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