Every stepper motor has a stator and rotor, effectively like any other electric motor. Their unique feature is the segmented nature of the stator, forming what are commonly referred to as ‘teeth’.

The analogy is apt and helps to understand how a linear motor works, but it begs the question: what if we could unroll the stator in two dimensions instead of just one? That’s the idea behind ...

Electric motors usually comprise a stator and a rotor, with the latter rotating inside the former. Donut Lab thinks this design is outdated, and a hollowed-out rotor can offer important advantages.