Re: Induction Stove for Hysteresis Experiments...
From: legg (legg_at_nospam.magma.ca)
Date: 02/27/05
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Date: Sun, 27 Feb 2005 23:59:51 GMT
On 26 Feb 2005 20:51:01 -0800, kzan1234@gmail.com wrote:
>Hi everyone,
>
>I'm trying to use a commercially available induction stove used for
>cooking to determine the hysteresis losses (power losses)in magnetic
>structures when exposed to AC fields - I hear these stoves provide
>frequencies in the 20-35 kHz range - however, I'm not really sure about
>the field strengths of them (I've been using a coil of wire fed into a
>scope to determine the relative magnitude of the field and frequency.)
>
>Typically these stoves set up mostly eddy currents, but also create
>hysteresis losses in large iron or stainless steel pots (they only
>activate if they sense a magnetic material on it.)
>
>I'd like to work with them and avoid building a very large induction
>heater which will cost a lot and have to be water cooled because of the
>current that they draw.
You may be going about this a little bass-ackward.
Firstly, hysterisis is a material characteristic that would have to be
measured, applying a controlled field. These materials are available
in structures that make this fairly easy.
Then the losses resulting in the hysterisis measurement setup have to
be measured. Calorimetric methods are the least equipment-intensive.
Heating through externally applied magnetic field is crude and
uncontrollable.
RL
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