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# Re: [femm] femm 3.0 beta version available

- To: <femm@egroups.com>
- Subject: Re: [femm] femm 3.0 beta version available
- From: "Eckart Nipp" <eckart.nipp@m-v-l.de>
- Date: Thu, 18 May 2000 14:13:50 +0200
- Reply-to: "Eckart Nipp" <Eckart.Nipp@m-v-l.de>

    Hi Dave,

    thanks for the information.

    >> to chose weather to keep or remove the original. Then mirroring in place
    >> can be carried out.
    >

    >This would be easy enough to implement....

    I thought so. Therefore I suggested it.

    >To do this sort of thing (like a shorted turn), you define a "circuit" in
    >which the total current is zero. You then apply this "circuit" property to
    >all the parts of your shorted turn (or cage rotor or whatever). This forces

    Great. That works. My mistake was to set zero voltage.

    A difficulty is the rectangular selection tool. With that it is comparably
    troublesome to select e.g. a rotor of an asynchronous motor with all its
    slots but not any part of the stator. This is particularly hard if the
    airgap is short. Maybe an optional circular selection tool can be
    developed. Also a deselection possibility, e.g. by holding shift, would be
    useful. When playing around with a not predefined geometry also the
    possibility of moving parts per mouse may be useful.

    Can the circuit property also be used to define the voltage of an exciter
    coil which is aymmetrically placed so that it is unknown in the beginning
    how the total voltage distributes on forward and backward pathes?

    Now I think I also found a bug in the group copy tool. When I chose a
    circle consiting of two 180deg arcs and copy it as a row, i.e. several
    copies at once, I get the desired circles but in addition a row of anchor
    points.

    Greetings
    Eckart

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