Quote:
Originally Posted by zeropointbug
Just to elaborate on the laminations a bit more... the laminations play a large role in the efficiency of there small motors because when you have a magnetic field at a decent frequency on a piece of iron, it will heat up, it heats up because it causes 'micro turbulence's' within the field and causes little whirls of current, or 'Eddy currents', these currents are basically micro shorts, which are doing NO work, and making only heat as the biproduct (also affects magnetic strength a small amount). The higher frequency you go, the more heat is created in this manner, basically a linear curve, that's why when you add enough cells to a setup the rpm's increase, and this causes lot's of heat buildup, in particular a feaiaiago motor is cursed with this symptom. This happens because iron is conductive... NOW, if we were to make very thin sections of this iron and electrically insulate each lamination with a resin/bonding agent, then the Eddy currents are much smaller, and thus less heat is created, and less energy wasted equals more energy to make motive power, hence a more efficient motor.
Just plain tolerances/quality control make a better, more efficient motor as well, which the feiaiaiaieiegao's are missing.
Shouldn't there be a sticky post on this kind of stuff here? This is RCM!  |
Does this mean that Air core motors suffer no iron loss since there is no iron cores in them?
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