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# Re: [FEMM] Simple solenoid help

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- Subject: Re: [FEMM] Simple solenoid help
- From: David Meeker <dmeeker@ieee.org>
- Date: Thu, 15 Apr 2004 15:52:29 -0400
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`Kalpit V Desai wrote:`

> `Hi all,`

>     I am Kalpit, a new member of "FEMM Community". I am novice with FEMM and I
>     am trying to model some simplest geometries. I have just uploaded the file
>     "solenoidCentered.fem" in the directory ../yahoo_files.
>     Here I am trying to model a simple solenoid in axissymmetric geometry. The
>     two rectangular blocks represents copper coils. I am using asymptotic
>     boundary conditions for two of the four boundaries.
>     I am not able to solve for this geometry.
>     Can anyone please point out what am I missing here?
>     Is that the case with axissymmetric geometry that I can only draw right
>     half and I have to leave the left half out?

>     Thanks a lot in advance,
>     Kalpit

`For axisymmetric problems, you just model the region for r>=0. FEMM 4.0 gives you an error message that tells you that you can't have anything in r<0 for axisymmetric problems, but v3.3 just gives a cryptic "can't analyze the problem" error message for this condition.`

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- References:
  - [FEMM] Simple solenoid help
    - From: Kalpit V Desai <kvdesai@email.unc.edu>

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