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Magnetron Magnets=Chokes.....
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From: Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Sunday, March 08, 1998 7:17 PM
To: Tesla List
Subject: Re: Magnetron Magnets=Chokes.....
All,
This post gives me an idea which I would welcome comments from
experts in magnetism on:
> From: Atle Jorstad [SMTP:anjorsta-at-online.no]
> Sent: Sunday, March 08, 1998 11:41 AM
> To: Tesla List
> Subject: Re: Magnetron Magnets=Chokes.....
>
> At 08:59 AM 8/3/98 -0600, you wrote:
> >
> >----------
> >From: Zuma [SMTP:mwise-at-ns.sosis-dot-com]
> >Sent: Sunday, March 08, 1998 2:04 AM
> >To: tesla-at-pupman-dot-com
> >Subject: Magnetron Magnets=Chokes.....
> >
> >Is it possible to use the magnets from a magnetron to make chokes with?
> >Would the magnetic field interfere with the chokes or would it help the
> >chokes? I am guessing, but I think that the magnetic capabilities of the
> >magnet will cause the chokes to not work. But none the less I figured I
> >might ask to see if this has ever been tried.
> >
> >Chris
> >
> I believe that a magnet field would saturate the choke core, making it useless.
> Atle Jorstad
Normally in a flyback switcher, the core is operated only in one
quadrant of the B-H curve. Now suppose a pre-biased core (i.e. a
magnetized one) was worked against its magnetism. This would allow
full core utilization in a flyback design, a highly desirable feature.
Question: would applying such a reversal, even say to 1/2 way towards
reversing the magnetic field in the core cause a degradation of the
remanent magnetism?? I suppose what I'm asking is: which permanently
magnetized materials could you do this to and get away with it?
Malcolm