Patent ID: 6455963
Filing Date: 2002-09-24
Classification: H02K

Abstract:
An electric motor having a heat discharge structure on a frame, having a cylindrical shaped bore for accommodating an electric coil and a stator coil, wherein the frame is comprised of a diecast block having a rectangular shaped cross section, wherein the diecast block has a plurality of grooves which allow for flow of a cooling media which are formed on one of a pair of opposite outer surfaces of the diecast block so as to be perpendicular to a plane including a central axis of the cylindrical shaped bore, wherein the diecast block has a plurality of communication paths which are formed along with another pair of outer surfaces of the diecast block so as to be perpendicular to the grooves for communicating between each of the grooves formed on the different outer surfaces of the diecast block, and wherein each of the grooves formed on the same surface of the diecast block are communicated with each other by way of groove paths formed perpendicularly with respect to the grooves.