How does Thingap motor work?

[BobM2]

I've read the description on their web site but I can't figure out how it works. It sounds like there is no iron in the rotor and just a lot of "turns" to get a high NI. I'm sure I'm missing something. Can anyone explain how it develops torque different than a wound DC motor?

 

[sreid]

bobM2,

You are not missing anything, the Thingap motors develops torque like any other motor. Their claim to fame is using laminations for windings so that they can (they say) stuff more copper into a given volume. This could also be more cost effective (in volume) than magnet wire windings. The brush motor windings appear to be similar to "Basket Wound" low inertia servo motors. The brushless motors appear to be similar to slotless brushless servo motors.