Rotating electrical machine unit with a power inverter having a ring-shaped casing

摘要

A rotating electrical machine unit includes a rotating electrical machine including a ring-shaped stator and a rotator provided inside of the stator, and a power inverter including a ring-shaped first casing and a power module accommodated in the first casing and integrated with the rotating electrical machine by being stacked in such a manner that a lower surface of the first casing is in contact with an upper surface of the stator. The power inverter has a first coolant path formed to have a ring shape in the first casing. The power module has a heat radiation unit arranged in the first coolant path and exchanging heat with a cooling medium flowing in the first coolant path.

主权项

1. A rotating electrical machine unit comprising:
a rotating electrical machine including a ring-shaped stator and a rotator provided inside of the stator; and a power inverter including a ring-shaped first casing and a power module accommodated in the first casing, and integrated with the rotating electrical machine by being stacked in such a manner that a lower surface of the first casing is in contact with an upper surface of a stator core of the stator in an axial direction, wherein the power inverter has a first coolant path formed to have a ring shape in the first casing, wherein the power module has a heat radiation unit arranged in the first coolant path and exchanging heat with a cooling medium flowing in the first coolant path, wherein the first coolant path is formed in such a manner that a first space concavely formed to have a ring shape from the lower surface of the first casing is closed by the upper surface of the stator core, and wherein the cooling medium is water.