[SI-LIST] Re: Why does lamination fail to prevent eddy currents at high frequencies?
- From: Ritchey Lee <leeritchey@xxxxxxxxxxxxx>
- To: vinu@xxxxxxxxx
- Date: Thu, 28 Mar 2002 10:06:03 -0800
You bet! The capacitor formed by parallel plate capacitance is the best in you
PCB.
Lee
Vinu Arumugham wrote:
> Can the laminates be viewed as parallel plate capacitors? At high frequencies,
> the eddy currents will then have a low impedance path.
>
> Thanks,
> Vinu
>
> Steve Rogers wrote:
>
> > I have seen a number of simple derivations explaining why it is a good idea
> > to laminate a conductor which lies in a magnetic field. The idea being to
> > slice up the material in the direction of the flux and hence break the path
> > of eddy currents. This is all very well and good, I then find it mentioned
> > in passing that this technique fails at high frequency but have not yet
> > found a good explanation as to why?
> >
> > Would anyone care to have a stab at an explanation, or maybe poiint me in
> > the direction of one?
> >
> > Thanks in advance
> >
> > Steve
> >
> > Steve Rogers B.Eng(Hons) AMIEE
> > RF Design Engineer
> > Micromill Electronics Limited
> >
> > email: srogers@xxxxxxxxxxxxx
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