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# [femm] Re: Drawing circles & Another AC analysis question

- To: femm@egroups.com
- Subject: [femm] Re: Drawing circles & Another AC analysis question
- From: Marctt2@aol.com
- Date: Thu, 11 Nov 1999 16:33:20 EST
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    In a message dated 11/11/99 4:21:56 PM Eastern Standard Time, Dcm3c@aol.com
    writes:

    << Now, inductance is:
    L=4*E/abs(i)^2
    The 4 gets in there (rather than a 2, like in the mstatic case) because we
    are working in terms of amplitude, rather than rms quantities. Likewise,
    resistance is: >>

    I'm assuming that E is calculated over the whole problem area (i.e. over the
    whole FEA region ?

    Also, when I do the integral over my coil volume to get total current, I get
    Total = Real + j(Imag) since there is a phase shift and amplitude change.

    I'm assuming that abs(i)^2 = Real^2 + Imag^2, or the amplitude^2 of the
    current. ?

    Thanks.

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