Automotive rotary electric machine stator and manufacturing method therefor

摘要

In the automotive rotary electric machine stator according to the present invention, a stator winding is constituted by distributed windings, slot-housed portions and root portions of coil end portions are formed so as to have flat cross sections, and the slot-housed portions are housed in the slots in contact with each other so as to line up in a single column in a radial direction such that long sides of the flat cross sections are oriented circumferentially. Flatnesses of root portions of the coil end portions that are radially adjacent and that extend outward in different circumferential directions from the slots are mutually different.

主权项

1. An automotive rotary electric machine stator comprising:
a stator core that includes: a cylindrical core back portion; a plurality of tooth portions that are arranged in a row circumferentially such that each extends radially inward from an inner circumferential surface of said core back portion; and a plurality of slots that are bounded by said core back portion and said tooth portions; and a stator winding that is mounted onto said stator core, wherein: said stator winding is constituted by distributed windings that include: slot-housed portions that are housed in each of said slots; and coil end portions that link together end portions of said slot-housed portions that are housed in pairs of said slots that are separated by a predetermined number of slots, said coil end portions extending outward in two circumferential directions from each of said slots; said slot-housed portions and root portions of said coil end portions that connect to said slot-housed portions are formed so as to have flat cross sections; said slot-housed portions are housed inside said slots in contact with each other so as to line up radially in at least one column; and flatnesses of root portions of two coil end portions that are radially adjacent and that extend outward in different circumferential directions from said slots are mutually different, and the flatness of a root portion of one of said two coil end portions positioned radially inward is greater than the flatness of a roof portion of the other of said two coil end portions positioned radially outward.