ROTARY ELECTRICAL MACHINE COOLING APPARATUS

摘要

A rotary electrical machine cooling apparatus includes: a rotary electrical machine including a stator having an annular resin portion which covers a coil end, and a rotor; and a cooling portion that injects a coolant from an upper side to the annular resin portion. The annular resin portion includes: an annular main body portion, and a plurality of island portions that protrude in the axial direction from a plurality of positions in a circumferential direction of an axially outer end face of the annular main body portion. The plurality of island portions include a plurality of first island portions having first maximum circumferential lengths and a second island portion that has a second maximum circumferential length L2 and the coolant impinges on the outer circumferential face to flow in a circumferential direction. Thus, the coolability of the coil can be improved.

主权项

1. A rotary electrical machine cooling apparatus, comprising:
a rotary electrical machine including a stator and a rotor, in which the stator has an annular resin portion which covers a coil end; and a cooling portion that injects a coolant from an upper side to the annular resin portion, wherein: the annular resin portion includes an annular main body portion that is provided on a stator core side in an axial direction of the stator, and a plurality of island portions that protrude in an axial direction from a plurality of positions in a circumferential direction of an axially outer end face of the annular main body portion; and the plurality of island portions include a plurality of first island portions that have a first maximum circumferential length, and a second island portion that has a second maximum circumferential length which is greater than the first maximum circumferential length of the respective first island portions and that is formed at such a position that the coolant impinges on an outer circumferential face thereof and that causes the coolant that impinges on the outer circumferential face to flow in a circumferential direction.