Originally Posted by zeropointbug (Post 319786)

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! :mdr:

Originally Posted by littlegiant (Post 319937)

Does this mean that Air core motors suffer no iron loss since there is no iron cores in them?

Originally Posted by lincpimp (Post 319789)

Yeah, still curious, but not bi-curious like you Harold... I still to women, singles or multiples if at all possible. I even try to make sure the camera-person is female, but that is not always possible.

Originally Posted by Arct1k (Post 320047)

neu's rotors are kevlar wrapped to whereas Feigaos are not...

Can i add press fit end bell on Feigao too

Originally Posted by big greg (Post 320061)

half pressed, and not glued. sometimes a slide fit <-- i like the sound of that:whistle:

Originally Posted by SpEEdyBL (Post 320044)

Actually feigao rotors are sintered. All sintered magnets are one piece that run the whole length of the rotor (except for some feigaos which have two or three magnets next to each other). The process of making them is from bits of magnetic material ground up into a paste, then molded into shape. They can be nickel plated or wrapped, so can't always tell that a rotor is sintered just by looking at it.

Originally Posted by brushlessboy16 (Post 320064)

Thats what she said.


Pressed endbells are not a signal to a bad motor. Aveox- the granddaddy of neu, uses some pressed endbell motors and they run just fine.:yes:

Originally Posted by Arct1k (Post 320080)

I believe S Nue used to work at/own (not sure which) Aveox and then formed Neu