Electric machine with cooling arrangement

摘要

An electric machine is provided. The electric machine includes a stator, a rotor and a closed cooling channel through which a gaseous cooling medium circulates. The stator includes a stator lamination at least partially encasing several stator windings. The closed cooling channel is disposed in circumferential direction of the stator lamination. The stator lamination is at least partially formed as fins.

主权项

1. An electric machine, comprising:
an inner stator comprising: a plurality of stator windings; and a stator lamination at least partially encasing the plurality of stator windings, wherein the stator lamination is at least partially formed as fins that project radially inwardly from the stator lamination; an outer rotor; and a closed cooling channel through which a gaseous cooling medium circulates, the closed cooling channel being disposed radially inside the stator lamination and extending all along a circumferential length of the stator lamination, wherein the closed cooling channel is delimited by the stator lamination such that the closed cooling channel is isolated from an air gap between the inner stator and the outer rotor, whereby the gaseous cooling medium is prevented from flowing into the air gap.