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Re: Ferrite chokes & saturation - why toroids?




From: 	RODERICK MAXWELL[SMTP:tank-at-mail.magnolia-dot-net]
Reply To: 	tank-at-mail.magnolia-dot-net
Sent: 	Wednesday, November 26, 1997 10:45 PM
To: 	Tesla List
Subject: 	Re: Ferrite chokes & saturation - why toroids?

Tesla List wrote:
> 
> From:   Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> Sent:   Wednesday, November 26, 1997 1:28 AM
> To:     Tesla List
> Subject:        Re: Ferrite chokes & saturation - why toroids?
> 
> Hi Roderick,
> 
> > From:   RODERICK MAXWELL[SMTP:tank-at-mail.magnolia-dot-net]
> > Reply To:   tank-at-mail.magnolia-dot-net
> > Sent:   Tuesday, November 25, 1997 7:27 PM
> > To:     Tesla List
> > Subject:    Re: Ferrite chokes & saturation - why toroids?
> >
> > > Not for this application to my knowledge (other than to minimize
> > > radiation). But I've used ferrite rods in chokes with no real
> > > problems. Perhaps someone who chose that core shape could answer this.
> > >
> > > Malcolm
> >
> >
> >   For less radiation. Also you seem to get higher inductance per turn in
> > a toroid of the same diameter, and material than you do in other shapes.
> 
> Right. But what is their inductance at the peak currents you are
> pushing through them?
> 
> Malcolm


   To be honest I don't know! I'm still working on The drive circuit for
my solid state coil driver. I should have it ready for a test run in
about a week or so. The main output transformer is a push-pull wound on
a large diameter iron powder core. How in the devil would you be able to
test their inductance while in operation anyway? The only way I have of
testing the inductance is with a LCR meter. If you know of another
method please let me know.


                               Frankensteins Helper
                                      Max