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# [FEMM] (no subject)

- To: FEMM <femm@list.foster-miller.net>
- Subject: [FEMM] (no subject)
- From: Santiago Salamanca <santiago@salamanca.de>
- Date: Wed, 18 Feb 2004 12:57:42 +0100
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    Hi, everyone.
    Dear Dr. David Meeker.

    By the program FEMM it is now posible to calculate
    electrostatics or magnetics problems.
    The program calculate with a COIL-INTENSITY (A) as INPUT. As
    results are, par example:

    Total current = 13052.1 - j 74325.1 Amps  (AMPLITUDE)
    Voltage Drop = 71.0381 + j 0.107124 Volts  (AMPLITUDE)
    Flux Linkage = 0.0385309 - j 0.219415 Webers
    Flux/Current = 2.95209e-006 - j 1.05879e-022 Henries
    Voltage/Current = 0.000161422 + j 0.000927428 Ohms
    Real Power = 459616 Watts
    Reactive Power = 2.64066e+006 VAr
    Apparent Power = 2.68036e+006 VA

    Well, but for Time Harmonic Magnetic Problems, i think it is
    better to calculate
    with the COIL-VOLTAGE -par example =1000.0+j0.0 (as efectiv, not
    amplitude).
    I propose, the programm calculate internal with
    V=1000*sqrt(2)Volt(as amplitude, if necesary!!) and with a
    Coil-Current=1 A (par example), calculate internal the new
    Voltage Drop and with some Iterations calculate a new
    Coil-Current and a new Voltage Drop,etc, until the condition:

         ABS(New Voltage Drop/COIL-VOLTAGE=1000.0*sqrt(2)-1)LT.1E-6

    For FEMM that is very easy!

    For Time Harmonic Magnetic ProblemsThe i think it is better the
    results as "efectiv"
    and not as AMPLITUDE.

    Thanks

    Santiago Salamanca

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