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# [FEMM] Max. Flux density in Silicon Steel

- To: femm@list.foster-miller.net
- Subject: [FEMM] Max. Flux density in Silicon Steel
- From: Wijono <wijono@yahoo.com>
- Date: Mon, 10 May 2004 21:02:35 -0700 (PDT)
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    Dear All,

    I am working in the permanent magnet generator design.
    One of softwares we use is FEMM. We use silicon steel
    material 50H470 that has non-linear permaeability. Its
    peak is 6000 at 1 Tesla of flux density.

    I have a question on the maximum flux density we have
    to use in the design. Does the maximum realtive
    permeability have to be used in order to get the best
    performance - and it means that the maximum flux
    density is kept on 1 Tesla?
    I use this 1 Tesla value -  actually it is the
    average, but our design is significantly big, and the
    power output to weight ratio is lower than if we use
    flux density more than 1 Tesla - say 1.8 Tesla. The
    saturation point is around 1.9 Tesla.
    In other hand, the advantage of using 1 Tesla is the
    flux linkage in the coil is 3 times higher.

    I do appreciate your help.

    Best Regards,

    Wijono

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