Coil with twisted wires and stator assembly of a rotary electric machine

摘要

A rotary electric machine includes a stator having an open slot configuration and a plurality of stator poles with a coil positioned about each stator pole. Each coil has a plurality of electrically conductive wires defining a group of wires and the group of wires is wrapped generally around a stator pole to define a plurality of turns. At least a portion of the group of wires is twisted, and the portion of the group of wires has between approximately 1 and 5 twists per turn. A method of fabricating a stator assembly is also disclosed.

主权项

1. A method of fabricating a stator assembly of a rotary electric machine, comprising:
providing a stator having a plurality of stator poles; forming a plurality of coils with each coil including a generally symmetrical cross-section by:
supplying a plurality of electrically conductive wires to define a group of wires;twisting the group of wires at a predetermined rate;wrapping the group of wires a predetermined number of turns to form a coil; andthe step of twisting the group of wires including twisting the group of wires along an entire length of each turn between approximately 1 and 5 twists per turn of the coil, and each electrically conductive wire of each turn being laterally movable relative to others of the electrically conductive wires of the turn along at least a portion thereof; mounting each coil around a single stator pole including laterally moving at least some of the electrically conductive wires of each turn to modify the coils so as to form a generally asymmetrical cross-section across a portion thereof.