Barbara,

Magnetic permeability varies with many factors like flux density, magnetization,
polarization and temperature. Actually it's the slope dB/dH of the B-H curve of
that material. It's relatively easier to just talk about the initial
permeability (B< 10 gauss) at a particular temperature, but still I've never
heard about the existence of a mathematical function. If you want to get an idea
of how Ui varies with freqency, you may look at a magnetic core supplier's
catalog (Magnetic Inc., AVX, Philips, Siemens, Tokin, TDK, etc.). Of course it
only tells ferromagnetic material's. I can send you some scanned pages if you
want.

K.K. Chin
Artesyn Technologies,
Fremont, CA
http://www.artesyn.com




Barbara Burcham <[log in to unmask]> on 05/12/2000 09:24:05 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      Barbara Burcham <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: KK Chin)

Subject:  [TN] Formula for the Permability of Materials at different
      frequencies              ?



Formula for the Permability of Materials at different frequencies?

Anyone out there have one of these that can be shared?

Thanks,
Barbara Burcham

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