Cc/neu Motors

[BrianG]

Speaking about motor efficiency, I've heard it said that a slotless stator design (basically an air core) is generally more efficient, but the Neus are slotted. I would think because of the slotted nature (windings wrapped around a "core") that the magnetic field would be much more focused, and wouldn't have as much flux loss. I can see that the width of the magnetic field would be a lot less in a slotted vs slotless. What are your thoughts on this?