Steve, Being non-magnetic, I didn't think aluminum would create any drag
or cogging. mmmm. I'll take your word for it Steve. Thanks for the input!
Loved Dan Lenox's turbine build write up! Great piece of work and should
be required reading by all !! "59 turns #14 2-in hand" Oh yeah!! Great stuff!!
On Tue, May 31, 2011 at 6:50 PM, Steve Spence wrote:
> And create large amounts of drag.
> On Tue, 31 May 2011 14:03:58 -0400, <daniel.bromley@...> wrote:
> > Dan, consider this for a moment if you will....
> > * Make the stator plate with the likes of 1/4" 6061 aluminum plate....
> > then, dipping the outer circumference in insulating resin... THEN
> > winding the coils on it. ....Seems to me the plate would absorb
> > unwanted
> > heat rather well while offering great structural rigidity.
> > Thoughts/input ?
> > Dan Bromley
> > On Tue, May 31, 2011 at 7:26 AM, Dan Fink wrote:
> > We plan on a stator cast from vinyl ester resin with ATH filler to
> > be
> > able to dissipate about 3 watts per square inch of surface area over
> > the coils, *in the wind.* (less when dyno testing).
> > If your stator is getting so hot that complicated cooling systems or
> > expensive epoxies are needed, you are wasting tremendous amounts of
> > energy as heat, and should consider re-designing the alternator for a
> > better match to the blades (more copper, lower resistance, more
> > magnetic material)....or simply making the turbine furl earlier, as a
> > quick stop-gap measure.
> Steve Spence
> Renewable energy and self sufficiency
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