| 摘要 |
In a rotating electric machine, a stator includes a stator core having slots formed therein and a stator coil comprised of phase windings each of which includes in-slot portions and turn portions. The turn portions of the phase windings together constitute a coil end part of the stator coil. Further, a cooling mechanism is provided to drop liquid coolant onto the coil end part. Moreover, the turn portions of the phase windings include long-pitch turn portions and short-pitch turn portions. In the coil end part, there are axially-overlapping pairs of the long-pitch and short-pitch turn portions over an entire circumferential range of the stator coil. For each axially-overlapping pair of the long-pitch and short-pitch turn portions, the short-pitch turn portion is located axially inside the long-pitch turn portion and faces the long-pitch turn portion through a void space formed therebetween over entire lengths of the long-pitch and short-pitch turn portions. |
| 主权项 |
1. A rotating electric machine comprising:
a rotor; a stator including an annular stator core and a stator coil, the stator core being disposed in radial opposition to the rotor and having a plurality of slots arranged in a circumferential direction of the stator core, the stator coil being comprised of a plurality of phase windings mounted on the stator core, each of the phase windings including a plurality of in-slot portions and a plurality of turn portions, each of the in-lot portions being received in one of the slots of the stator core, each of the turn portions being located outside the slots of the stator core to connect one pair of the in-slot portions respectively received in two different ones of the slots, the turn portions together constituting a coil end part of the stator coil on at least one axial side of the stator core; and a cooling mechanism configured to drop liquid coolant onto the coil end part, thereby cooling the stator coil, wherein the turn portions of the phase windings of the stator coil comprise, at least, a plurality of first-type turn portions and a plurality of second-type turn portions that have a smaller length than the first-type turn portions, in the coil and part of the stator coil, there are axially-overlapping pairs of the first-type and second-type turn portions over an entire circumferential range of the stator coil, for each axially-overlapping pair of the first-type and second-type turn portions, the second-type turn portion is located axially inside the first-type turn portion and faces the first-type turn portion through a void space formed therebetween over entire lengths of the first-type and second-type turn portions. |
