You can see a demonstration video of SMES below the fold. Who says you have to use magnet motors in electric cars? Also below the fold is a video of a Spherical Ultrasonic Motor developed by the ...

A much less obvious implementation is a second-order radial flux coaxial magnetic gearbox ... this a torque-limiting feature for certain use cases. With a bit of testing, he determined the ...

The screws serve to conduct magnetic flux between the magnets, dragging the rotating elements along for the ride. This gearbox appears to be a refinement on [Retsetman]’s earlier design ...