Questions about slot and slotless motors

[BrianG]

Like Carzjr said; a slotted motor has windings wrapped around iron (usually laminated) cores. A non-slotted motor is basically a "basket" of wire inserted into a cylinder core and the wires don't wrap around a core.

I would think a slotted design would be better since it concentrates the magnetic fields and thus increases torque. But this page seems to think otherwise. What they say seems to make sense about the cogg-free characteristics since both Neus and IIRC Novak use slotted motors and those have issues on the MM. They also say that slotless motors can be more efficient ( heat up less), are smoother running, etc. I wonder if Neu motors would be better if they were slotless while maintaining the higher end quality? I guess then they would be Lehner. : )

[zeropointbug]

Yes, I too know slotted and slotless motors as what you two describe... I on the other hand know that there have been some crazy efficient (98.5%) using slotless design. To me, it kinda makes sense that it would be more efficient. IMO

But as far as motors available, yes the Lehners are slotless (i think), as well as most motors like Feigao's, etc. The Neu's are slotted, like Brian said... the Lehenrs and Neu seem to be equal as far as power and efficiency goes on a per weight basis.