Power Tools with Motor Having a Multi-Piece Stator

摘要

A hand-held power tool, comprising: a housing in which an electric motor of a predetermined frame size is disposed, the motor including: a stator having a lamination stack having pole pieces mated to return path pieces and field coils disposed on the pole pieces; an armature disposed in the stator, the armature having an outside diameter that is at least 0.625 of an outside diameter of the stator; a length of the lamination stack of the stator being the same length as a length of a lamination stack of a stator of a needle wound motor of the same frame size; and the motor having a maximum power output that is at least ten percent greater than a maximum power output of the needle wound motor of the same frame size with the same length lamination stack where both motors have the same maximum no load speed.