[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# Re: [FEMM] Development Release

- To: FEMM mailing list <femm@list.foster-miller.net>
- Subject: Re: [FEMM] Development Release
- From: David Meeker <dmeeker@foster-miller.com>
- Date: Thu, 20 Nov 2003 11:43:26 -0500
- In-reply-to: <3FBC4734.6080005@foster-miller.com>
- List-archive: <http://femm.foster-miller.net/pipermail/femm>
- List-help: <mailto:femm-request@list.foster-miller.net?subject=help>
- List-id: FEMM mailing list <femm.list.foster-miller.net>
- List-post: <mailto:femm@list.foster-miller.net>
- List-subscribe: <http://femm.foster-miller.net/mailman/listinfo/femm>, <mailto:femm-request@list.foster-miller.net?subject=subscribe>
- List-unsubscribe: <http://femm.foster-miller.net/mailman/listinfo/femm>, <mailto:femm-request@list.foster-miller.net?subject=unsubscribe>
- References: <3FBC4734.6080005@foster-miller.com>
- Reply-to: FEMM mailing list <femm@list.foster-miller.net>
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5; MultiZilla v1.5.0.2d) Gecko/20031007

`I was alerted to a bug in the Materials Library in the version that I uploaded yesterday:`

>     Each time I open the program and then open the material libraries, the
>     program creates new materials identical to the first.
>     The files matlib.dat and statlib.dat then grow in their dimensions, doubling
>     every time.

`I've just uploaded a revised version to http://femm.foster-miller.net/files.htm that should fix this behavior--sorry about that. Anyhow, if anyone notices any other glaring bugs, please let me know--fixing bugs what a "Development Release" is all about.`
`Dave.`
`
David Meeker wrote:`

> `I've put up a new development version of femm on the web, this time in the Files area associated with the mailing list:
> http://femm.foster-miller.net/files.htm`
> `Substantive changes since the last Development Release include:`
> `* A somewhat better notion of "circuits" has been implemented for magnetic
> problems. The "circuit" properties now allow the user to specify either
> series-connected or parallel connected regions. In addition,
> series-connected regions can also be assigned a number of turns, so that
> the modeling of multi-turn coils is simplfied. The number of turns for a
> region is specified at the block label level (e.g. like the way that
> magnetization direction is specified.) In the postprocessor, the program
> calculates the voltage drop, flux link, etc. for each "circuit". A new
> button has been added to the postprocessor toolbar to make it easier to
> see the circuit results.`

>     * The DXF import has been improved.  The import routine is now more savvy
>      about identifying and automatically resolving potential DXF import
>      problems. Since it was pointed out to me that most DXF problems involve
>      endpoints of lines that don't meet, all "orphaned" lines are displayed
>      after the DXF import so that the user can inspect for possible problems.
>      Multiply defined regions are also noted in the postprocessor, which is
>      also a common symptom of DXF import errors.

>     * Density plot of J has been added to the density plot choices for DC
>      magnetics problems.

> `* An extra "problem definition" attibute has been added to allow the user to
> specify the minimum angle constraint used by Triangle when meshing a
> geometry. The value of this constraint was previously hard-coded.
> Occasionally, a geometries with sharp angles can arise that require the
> minimum angle constraint to be reduced for proper meshing.`
> `* A "log plot" button has been added to the BH curve definition dialog that
> points the entered BH curve with H on a log scale. The log plot can make
> it easier to visualize the curve at low values of H.`
> `* Extra functionality has been added to the Materials Library that makes it
> possible to import material definitions from either another input file or
> alternate versions of the materials library.`

>     * An extra block integral has been added to magnetic problems for
>      calculating moment of inertia.

> `* A preference has been added to the magnetics postprocessor so that Hc is
> subtracted from what FEMM usually reports a H inside permanent magnets,
> conforming to the "classic" way of thinking about flux inside magnets.`

``
`--
David Meeker
Senior Engineer
Foster-Miller, Inc.
350 Second Avenue
Waltham, MA 02451-1196
781-684-4070
781-890-3489 (fax)
dmeeker@foster-miller.com http://femm.foster-miller.com`
``

- Follow-Ups:
  - [FEMM] How does femm handle coercivity and core losses?
    - From: "robert Macy" <macy@california.com>

- References:
  - [FEMM] Development Release
    - From: David Meeker <dmeeker@foster-miller.com>

- Prev by Date: Re: [FEMM] About the modelization of small coils
- Next by Date: [FEMM] How does femm handle coercivity and core losses?
- Previous by thread: [FEMM] Development Release
- Next by thread: [FEMM] How does femm handle coercivity and core losses?
- Index(es):
  - Date
  - Thread