[jolhoeft]

I'm curious how you are using 3-D printing for an electric motor. Most of the key components, steel laminations, copper windings, magnets, commutator and brushes (if you are going old school :-) ) don't lend themselves to 3-D printing. I just see some mounting hardware being usefully printed.

[iamgopal]

Induction motor as currently built are actually pretty good. Nothing to improve there, as they are usually fixed speed motors. When you think about automative or very variable speed motors, which have much higher power density and energy density, in those situations rotor cooling problems, eddy current losses, hysterisis losses are very fun problem to solve in context of 3D printing. Im not sure how much improvement can be done, but lets see..

[lisivka]

If you are just curious, then look at these videos of two kinds of motors (low-voltage and high-voltage) by lasersaber:

https://www.youtube.com/watch?v=6m73MaNoSIM

https://www.youtube.com/watch?v=oMK0dEKWJdY