Patent ID: 9293958
Filing Date: 2016-03-22
CPC Classification: H02K

Claim Text:
1. A stator including a coil formed by winding a conductor, a stator core provided with a teeth on which the coil is mounted, and a resin molded part covering a coil end portion of the coil mounted on the stator core with resin, wherein an insulator is formed and provided by insert molding between the stator core and the coil, and wherein the resin molded part includes a cavity formed through in a radial direction and fully enclosed in both circumferential and axial directions of the stator core, the cavity serving as a stress relaxing section between the coil and an end face of the stator core to relax stress generated in the resin molded part caused by heat influence in a usage environment, and wherein the insulator includes an end face wall covering the end face of the stator core, the end face wall is provided with a breakable groove formed along the cavity to break the insulator.