Helical armature

A helical armature is a form of air-gap electric motor or generator armature wound in a helical fashion as opposed to a conventional random or orthocyclic winding.

Such a design is of interest in superconducting motor and generation technology,[1] though comparatively little research has been done on the subject.

[1] An important downside, though, is that such armatures provide poor winding factors.

[2] Helical windings also provide low inertia and smooth torque for low-speed DC motors.

[3] Future superconducting generators would benefit from a helical winding because due to the absence of active and end zone it can be supported uniformly, unlike a conventional winding.