Axial Induction motor with no magnets.

[GordonFreeman]

Is there such a thing? I'm thinking the stator design would be like the coreless pancake motors I've seen on here. And the "cage" rotor would be sort of a "spoked" shape. An inner ring, an outer ring, with the copper conductor "spokes" connecting them. Would that be the right orientation to work? Asynchronous is a goal.

Upsides, downsides?

Also do induction motors need laminations on both stator and rotor? I see coreless designs on here, so what do lamenations really do?

[GordonFreeman]

Nothin"? Maybe my paint skills will get some comments.

axial_induction.png (16.58 KiB) Viewed 482 times

[major]

Axial air gap induction motors (and generators) have been around for a while although not too common. Here's a discussion: http://forums.aeva.asn.au/viewtopic.php?t=1966 Google brings up many other examples.

And ferromagnetic cores are used because the material has a magnetic permeability of thousands times greater than air.

Regards,

major

[GordonFreeman]

Ah, thanks. So it works and a wheel motor is indeed the application.

There must be some reasons it's not popular, since it's not a new idea.

I ask about coreless as this would be a DIY project. I assume coreless would make less torque?

Thanks for the input.