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# single wire -magnetic potential A problem

- To: femm@yahoogroups.com
- Subject: single wire -magnetic potential A problem
- From: tborzic@yahoo.com
- Date: Tue, 16 Oct 2001 22:55:32 -0000
- User-agent: eGroups-EW/0.82

    Hello everybody, My name is Tomislav and as You may assume
    I'm new here and I am looking for some help regarding FEMM.
    I am trying to solve some "simple" problem.It goes like this:
    1. Round wire,copper, infinite lenghth,we look at cross section
    ,r=0.075m =7.5cm, I= 100 + j0 A,f= 50Hz, relative
    permeability is 1.Working with old "pen and paper" i got some results
    which are sure correct.Point is to get same thing in FEMM.
    What I do is called "numerical callculations of eddy current in round
    conductor".I nedd to obtain values of "A" in points r1=0, r2=0.25,
    r3=0.5 and r4= 0.75. (In point r4 A = 0, boundary conditon,allready
    given).
    So what I need is that some one helps me to solve this,tell me
    how to define parameters for my problem in FEMM,keeping in mind that I
    am new here,but in near future i intend to use FEMM rather often.
    My results are:
    A1=0.9999951 x10-5 -j0.2109364 x10-7
    A2=0.8888852 x10-5 -j0.1666658 x10-7
    A3=0.5555543 x10-5 -j0.6510389 x10-8
    A4=0.5169879 x10-22 -j0.6638621 x10-19 ( this should be 0 but
    this is good enough)
    So I need to obtain this rezults with FEMM.
    Thanks

    P.S. To mr. David Meeker:
    i am translating User's manual to Crotian,for my personal needs,and
    for other students on University of Split, who may need it.When I am
    done
    (about 20 days i guess), I can convert it to *.pdf and send it to you
    if you want,and make it available for everybody on internet?

    Tomislav Borzic
    tborzic@yahoo.com

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