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# Re: interest about this [femm] FEMM + MathCad

- To: <femm@yahoogroups.com>
- Subject: Re: interest about this [femm] FEMM + MathCad
- From: "dragospopa" <dragospopa@pcnet.ro>
- Date: Fri, 14 Jun 2002 23:18:39 +0300
- References: <C374A156357BD3118D1800A0C9F4842F05E3FEAC@chester.renishaw.com>

    Hi !
    I'm interest about this and i want to toke about.
    Dragos
    ----- Original Message -----
    From: "Finlay Evans" <finlay.evans@renishaw.com>
    To: <femm@yahoogroups.com>
    Sent: Tuesday, May 28, 2002 10:06 AM
    Subject: RE: [femm] FEMM + MathCad

    > I'm sorry for the long timespan, but I have been too busy to make any
    > progress recently with the Active X mods. I should be able to pick it up
    > again in about 3-4 weeks time I think.
    >
    > Finlay.
    >
    > -----Original Message-----
    > From: Gal Janos [mailto:jgal@hunelec.hu]
    > Sent: 27 May 2002 09:10
    > To: femm@yahoogroups.com
    > Subject: RE: [femm] FEMM + MathCad
    >
    >
    > Hi,
    >
    > A few monthes has passed. How is it going with ActiveX? I am still
    > interested in connecting FEMM to MathCad somehow.
    >
    > Janos Gal
    >
    > -----Original Message-----
    > From: Finlay Evans [mailto:finlay.evans@renishaw.com]
    > Sent: Friday, February 08, 2002 9:27 AM
    > To: 'femm@yahoogroups.com'
    > Subject: RE: [femm] FEMM + MathCad
    >
    >
    > Hi,
    >
    > Yes, we have been putting ActiveX Automation into Femme, and it works
    > well,
    > but it is not finished yet (we only have the commands that we are using
    > at
    > the moment). It hooks onto the Lua interface which seemed to be the
    > easiest
    > way of doing it at the time. When it is finished you would be able to
    > call
    > any Lua function from other applications (Exel, Mathcad, Matlab etc..)
    >
    > I havent tried accessing using Mathcad, but currently we are building
    > parameterised Femme models from within Matlab (including solving and
    > postprocessing). I have also built a VisualBasic application for a
    > specific model, so that I have a GUI for the model parameters. This
    > works
    > well when I want to do multiple solves etc.
    >
    > I could try and see if Mathcad works too... Hopefully it won't be too
    > long before we can complete the interface.
    >
    >
    >
    > Finlay Evans
    >
    >
    >
    > -----Original Message-----
    > From: David Meeker [mailto:dmeeker@foster-miller.com]
    > Sent: 07 February 2002 18:25
    > To: femm@yahoogroups.com
    > Subject: Re: [femm] FEMM + MathCad
    >
    >
    >
    >
    > Gal Janos wrote:
    >
    > > Hi,
    > >
    > > I am a new FEMM user, dealing with rotating machine design; designing
    > mainly
    > > large induction motors. Most of our calculations are in MathCad, and I
    > > intend to use the FEMM for leakage reactance calculation of high skin
    > effect
    > > rotor slot shapes. Is there anyone who has already connected FEMM to
    > MathCad
    > > for any reason?
    > > Is there anyone with the same interest?
    > >
    > > Janos Gal
    > >
    >
    > Currently, I don't know of a way to hook into FEMM directly from
    > MathCad.
    > One
    > of the users is working on developing ActiveX automation for FEMM, which
    > according to the MathCad documentation would allow one to access FEMM
    > directly
    > from within MathCad. This is a pretty cool extension to the program,
    > but I
    > need
    > to do a little bit more work to understand how the ActiveX automation
    > stuff
    > actually works so that I can support it in a future release. (Can
    > anyone
    > have a
    > good place to start? ActiveX appears to be very poorly documented in
    > the
    > material that comes with MSVC++).
    >
    > In the mean time, it is currently possible to access FEMM from within
    > some
    > mathematical analysis programs like Mathematica, Matlab, etc. without
    > using
    > ActiveX, via calls to the operating system. This method works, although
    > it
    > is
    > pretty klunky. The reason that I think that you can't do this approach
    > in
    > MathCad is that I can't find a way to make operating system calls in
    > MathCad.
    >
    > Anyhow, I'd been meaning to put up an example of this for a while, and I
    > finally
    > got around to making one up. See:
    > http://groups.yahoo.com/group/femm/files/scripting/roters1b.zip
    > In this example, I've written a Mathematica function that calls FEMM to
    > do
    > magnetic analysis. Specifically, the example is of a solenoidal
    > actuator.
    > The
    > Mathematica function takes the plunger position and coil current as
    > inputs
    > and
    > returns the magnetic field coenergy and force on the plunger. I then
    > call
    > the
    > function a bunch of times to make some graphs that can be compared to
    > some
    > experimental data about this particular actuator from a classic book on
    > magnetic
    > actuator design.
    >
    > Dave.
    >
    >
    >
    >
    >
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    >
    >
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- References:
  - RE: [femm] FEMM + MathCad
    - From: Finlay Evans <finlay.evans@renishaw.com>

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