Methods and apparatus for twisting rotor and stator conductor ends

摘要

Methods and apparatus for twisting rectangular rotor and stator conductor ends whereby most if not all conductor ends are bent at once, radially adjacent ends being bent in opposite directions. A lost motion member may be used to bend selected conductors through lesser angles for such purposes as phase interconnection and power leads. The rectangular conductors are retained against twisting so that flat conductors will bend about an axis perpendicular to the larger dimension of the conductor cross section. Various features of the methods and apparatus are disclosed.

主权项

1. A method of bending the free ends of rectangular motor winding conductors comprising:
providing a bending fixture having four rings with a plurality of pockets configured to receive winding conductor ends disposed on each ring, each ring being concentric with an axis of the bending fixture, wherein a first ring and a third ring are rotatable about the axis through a first angle relative to a second ring and a fourth ring, and the plurality of pockets comprises a lost motion pocket disposed on one of the rings, the lost motion pocket being rotatable through a second angle smaller than the first angle; placing a rotor or stator into the bending fixture with free ends of rectangular motor winding conductors disposed on the rotor or stator extending into the pockets of the four rings; and rotating the first and third ring through the first angle relative to the second and fourth rings to bend the free ends of the rectangular motor winding conductors, wherein the lost motion pocket is rotated through the second angle when the first ring is rotated through the first angle.