Re: Induction Stove for Hysteresis Experiments...

From: legg (legg_at_nospam.magma.ca)
Date: 02/28/05 

Date: Mon, 28 Feb 2005 22:54:44 GMT

On Sun, 27 Feb 2005 23:29:20 -0600, hmurray@suespammers.org (Hal
Murray) wrote:

>>Heating through externally applied magnetic field is crude and
>>uncontrollable.
>
>Many years ago, it was a classic way to heat steel for things
>like, well, heat treating. Pick the frequency for the depth of
>heating.
>
>Is there a modern replacement that's better?

This fellow is looking to measure the effect - heating,
due to a cause - hysterisis, under the influence of a measurable
alternating magnetic field in the material.

"Measuring Soft Ferrite Core Properties"
http://www.tscinternational.com/tech4.pdf

"Testing Critical Characteristics of Soft Ferrite Materials
                 for Power Applications"
http://www.tscinternational.com/tech7.doc

"Ferrite Property Measurement"
http://www.steward.com/pdfs/cores/ferrprop.pdf

As one is dependant on the other and temperature, being characteristic
material properties, they all have to be measurable (and controlable
to a certain degree) before meaningful results can be extracted.

In some cases, a simple substitution of material, with all other
factors fixed, will tell you all you practically need to know, as the
material is seldom otherwise a candidate for user-controlled
'variation'.

RL

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