Patent ID: 7649296

Claim:
A stator having a stator core with a plurality of slots, the stator having a lead-extending side and the opposite side, the stator comprising: a first winding inserted firstly into the slots corresponding to the first winding; a second winding inserted secondly into the slots corresponding to the second winding; a third winding inserted thirdly into the slots corresponding to the third winding; wherein the first, the second and the third windings are arranged in the circumferential direction of the stator in wave winding form; a first interphase insulator having a first pair of strip-shaped insulating sheets and a first connecting portion, wherein the first pair of the strip-shaped insulating sheets is connected with the first connecting portion so as to be spaced apart with each other at a predetermined distance; a second interphase insulator having a second pair of strip-shaped insulating sheets and a second connecting portion, wherein the second pair of the strip-shaped insulating sheets is connected with the second connecting portion so as to be spaced apart with each other at a predetermined distance; wherein end portions of the first pair of the strip-shaped insulating sheets are connected to the respective opposite end portions to form a first joint and a second joint, wherein the first connecting portion connects the first pair of the strip-shaped insulating sheets in such a manner that the first joint is shifted in the clockwise direction of the stator from the second joint so that the first and the second joints are disposed in a region avoiding an interference with the first winding on both of the lead-extending side and the opposite side; wherein end portions of the second pair of the strip-shaped insulating sheets are connected to the respective opposite end portions to form a third joint and a fourth joint, wherein the second connecting portion connects the second pair of the strip-shaped insulating sheets in such a manner that the third joint is shifted in the clockwise direction of the stator from the fourth joint so that the third and the fourth joints are disposed in a region avoiding an interference with the third winding on both of the lead-extending side and the opposite side.