Re: OLTC - Split core inductors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

The link was in a post in the archives (<grin>)..


http:/www.alphacore-dot-com/inductor.hm


> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>
> Hi Ed and Jim,
>
> I think Jim was referring to inductors made of wide copper ribbon but with
> no metal core, just air.  If anyone has a link or info on these, I can
> check into this.  I may be a solution if the copper/kapton does not get
too
> expensive.  Simple to make and low resistance for sure!  They use these at
> work for some things but I know little about the theory or design
equations
> behind them.  The spec would be:
>
> 150mH
> 5 amps peak
> ~1 ohm or less of resistance.
>
> The copper could probably be very thin.  DigiKey sells 0.75 inch kapton
but
> other tapes would work too in this less than human space flight
application ;-)
>
> MSC has two inch wide, 0.005 inch copper ribbon for $52/100 feet.  2-inch
> platting tape could be used I bet (tough, thin and cheaper than kapton).
> Just have to know the equation to use.  I quickly searched Google but
> didn't find much.  Even paper or poly would work...
>
> Cheers,
>
> Terry
>
> At 10:45 AM 8/17/2002 -0700, you wrote:
> >Tesla list wrote:
> >>
> >> Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> ><jimlux-at-earthlink-dot-net>
> >>
> >> Look at those tape wound air core inductors, remarkably high inductance
in a
> >> fairly inexpensive small package.. and, I'll bet that a simple core
might
> >> jack the inductance up pretty high.
> >
> > No way!  Those cores will saturate very easily, and in fact are
> >designed to do so.  Furthermore, their inductance will vary with
> >excitation voltage.  You still need enough core area and
> >turns/volt!!!!!!!!!!!!!!!
> >
> >Ed
> >
>
>