Stator coil made of joined conductor segments for rotary electric machinery and method for manufacturing the same

摘要

An object of the present invention is to improve electrical insulation between a small conductor segment and large conductor segment which forms stator coils inserted into slots of stator core of a driving motor for a automobile vehicle. The axial length of the curved head 3a' is made shorter than that of the curved head 3a. Further, the distance "d" between the border point "c" (the border point between the curved head 3a and legs 3b) and border point "c' " (the border point between the curved head 3a' and legs 3b') is made greater than the difference between the contraction quantity due to bending of the large segment 331 and that of the small segment 332. Thus, the contracted head 3a' (relatively displaced toward the legs) can stay inside the head 3a, thereby improving the electrical insulation between the small conductor segment and large conductor segment.