Over hanging portion
Over hanging portion
(OP)
Is there any relation between the overhanging portion(length) & efficiency or life cycle of a motor.
For example an motor with a less overhanging portion will be having a better efficiency than the one with a large overhanging portion?.
For example an motor with a less overhanging portion will be having a better efficiency than the one with a large overhanging portion?.





RE: Over hanging portion
Some motors are intended for direct drive, or some such phrase indicating that there is essentially no radial load, and in the interest of economy use relatively small bearings.
Motors that are intended for use with belts, chains or gears are so marked, at least in the catalog, and have relatively sturdy bearings. Somewhere in the data sheet you should find a rating for the allowed 'chain pull' or belt tension, and its allowable location on the shaft.
Mike Halloran
Pembroke Pines, FL, USA
RE: Over hanging portion
Yes, all other things being equal, the winding with shorter overhang will have better efficiency (lower copper loss)since currents in overhang do not do useful work.
*Nothing exists except atoms and empty space; everything else is just an opinion*
RE: Over hanging portion
But that brings up a question:
Given the lengths to which motor manufacturers will go to save pennies on bearings and mechanical parts, why would they spend the extra money for copper to build a motor with a nonzero overhang? Is there some advantage to it?
Mike Halloran
Pembroke Pines, FL, USA
RE: Over hanging portion
Reduced coil head extensions reduce the winding resistance but the heat sink function is reduced too, compromising the heat exchange or cooling of the winding.
RE: Over hanging portion
On the web, the provide only a brief excerpt, fwiw:
http://www.barks.com/2006/11-06feat.html
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RE: Over hanging portion
RE: Over hanging portion
Gunnar Englund
www.gke.org
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