Patent attributes
The apparatus disclosed herein relates to a pole piece for an electric machine comprising, a pole piece with a finger support structure, a plurality of fingers having an axial component of extension relative to the finger support structure, a coil contact surface and at least one of a protrusion or a depression having an axial component of extension relative to the coil contact surface. Further disclosed is a method that relates to assembling a coil to pole pieces comprising, axially compressing a coil between coil contact surfaces of a pair of opposing pole pieces and deforming the coil axially and without radial deformation with at least one of protrusions and depressions in the coil contact surfaces of the pole pieces thereby rotationally fixing the coil to the pole pieces.
