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# Inductance - more confusion

- To: femm@yahoogroups.com
- Subject: Inductance - more confusion
- From: jim.bloor@smiths-aerospace.com
- Date: Fri, 07 Sep 2001 07:52:15 -0000
- User-agent: eGroups-EW/0.82

    Hi

    Thanks to everone who responded to my plea for info on calculating
    inductance. However, I've now received some conflicting
    information. I understand that to determine inductance requires
    selecting an area of the model and obtaining the energy by
    integrating but one source says "integrate over the whole model"
    which I take to mean everything right out to the boundary, whilst the
    other source says "integrate only over the copper winding area".
    Which is correct?

    My feeling is that integrating over the whole model is the right way
    because the energy originates only from the coil. The magnetic flux
    generated would interact with the whole of the model and thus affect
    the inductance.

    Has anyone found a good source of magnetic data for stainless steels
    (other than MatLab)?

    Regards
    Jim Bloor

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