A threaded wobble motor with a 6-pole stator-a micro motor generating large linear displacement

This paper deals with the driving principle and the experimental demonstration of a micro motor which can convert rotation into linear motion and generate large displacement. The motor is a wobble type one; its rotor and stators have screw threads. When the rotor turns, it moves linearly in the axial direction like a screw. The range of linear motion is limited only by the length of the rotor. We have fabricated a threaded wobble motor by the electromagnetic actuation and operated it successfully.