rashid111 wrote:
Assuming one has a fairly straight approx 4.5" OD x 10" long round
motor with smooth surface, what would be a good way to get some heat
sink type of deal ?

I am thinking about

A) getting say 3/8 or 1/2 alum channel, cutting it into pieces the
length of the motor and attaching the "strips" flat bottom toward the
motor around the circumference. 3-4 zip-ties holding the Us against
the motor

B) doing something with copper or alum sticky foil, where you create
as many folds as possible in a "pleaded" fashion - infinitely messier
affair, but would it be more efficient in dissipating the heat ?

Either one will work, either one won't get a terribly good thermal
interface to the motor case. To get a good thermal interface to the
case you'd need to machine your heat sink surfaces to the diameter of
the case, and possibly strip any paint off the motor.

If this is a brushed motor, or otherwise has windings on the inside,
you're wasting your time. The heat is generated in the windings, so
unless they have a good thermal path to the case you'll probably gain
more by blowing air through the motor than by trying to conduct heat
away from the part that's not getting hot.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

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"Applied Control Theory for Embedded Systems" gives you just what it says.
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