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# Re: [femm] How to simulate a short circuit on a few turns to get the leakage inductance when very bad coupling.

- To: femm@yahoogroups.com
- Subject: Re: [femm] How to simulate a short circuit on a few turns to get the leakage inductance when very bad coupling.
- From: David Meeker <dmeeker@ieee.org>
- Date: Tue, 31 Dec 2002 16:15:14 -0500
- References: <20021230190747.44049.qmail@web14607.mail.yahoo.com>
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.1) Gecko/20020826 MultiZilla/v1.1.22

`john fox wrote:`

> `Hello every body and happy new year !`

>     I did not get any answer from my last question on this
>     subject .

> `So attached two examples at 25Khrz.`

>     The geometry is the same
>     Input= 7 turns with one amps each.
>     Output= 4 turns that I want to put on short circuit .
>     How to do that ! Help !

>     I have made a first test TESTV.FEM with Voltage=0 .
>     Not good the current is not the same in each turn. It
>     looks like each turns are individually shorted and not
>     the for 4 turns from one point to another.
>     I have made a second test TESTI.FEM with -1A in each
>     turn. It looks better ! but it is only a guess . I
>     have taken the global current from TestV for the 4
>     wires and divided by 4 which conduct to -1A.

>     So , I need help and advise. How to proceed to be sure
>     of the result in order to have leakage inductance +
>     skin effect losses in the wires!

`
You can't do what you want with just one simulation. However, you can do it with two. See attached.`

    Dave.
    --
    David Meeker
    email: dmeeker@ieee.org
    www: http://femm.berlios.de/dmeeker

Attachment: `zip00045.zip`
Description: Zip compressed data

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