Patent ID: 7965006
Filing Date: 2011-06-21
Classification: B25J,Y10T

Abstract:
1. A device for generating stiffness, comprising: a rotating shaft connected to a driven member; a rotor fixed to the rotating shaft and having arms comprising a magnetic element; a stator disposed so as to surround the rotor outside the arms and being connected to a drive motor for driving the driven member to be rotated by a rotation of the drive motor; a plurality of electromagnets fixed to an inner periphery of the stator so as to be apart from the arms by a predetermined gap and to be opposed to each other about the rotating shaft, each electromagnet having a core radially oriented with respect to the rotating shaft and a coil wound around the core; and means for applying a current to the coils; wherein the coils of one half of the electromagnets are wound so that N-poles are formed at ends thereof facing toward the rotating shaft, and wherein the coils of the other half of the electromagnets are wound so that S-poles are formed at ends thereof facing toward the rotating shaft.