Re: how deep do the coilers prefer doing it? : )

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>

Hallo Jim,

Sunday, February 12, 2006, 11:03:48 PM, you wrote:

> Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

> I suspect that in the motor mfr business, it's done empirically.  You
> build a bunch of prototype motors to get the dimensions, then go
> manufacture 10,000 more of the best.

> One CAN model these things, but it's quite complex.  I am under the
> impression that there aren't any simple analytical expressions that
> are useful

do you remember me giving a link on the russian site? one quote from
there:

"the researches has showed, that for rotor on fig. 3.6a the optimal
sizes would be:
the ratio of the pole span to the pole pitch - 0.5-0.6;
dmax/dmin=10-12."

so i think that here are at least some general rules and enough hard
data - maybe there is somebody on the list, who works in that business
and know that data?

> So, you just hack away to make it good enough, and unless you're in
> the business of making RSGs, you're probably only making one, and
> once it works, you call it done.

btw - tho i generally agree with you, i think that idea of using
FEMM in each peculiar case was not bad one ; ) i wish i had more free
time % )

-----
Let the bass kick! =:-D