ELECTRIC MACHINE Russian patent published in 2019 - IPC H02K9/19 H02K21/22 H02K1/32 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, namely to cooling systems of closed electric machines with a liquid-cooled stator. Electric machine comprises housing, stator with windings, rotor with magnetic conductor arranged on its hub and located outside the stator. In the housing on one end side of the stator there is an inlet annular cavity communicated with the cooling liquid source, and on the opposite side there is an outlet annular cavity communicated with the inlet cavity. Rotor hub surface and wall outer surface forming outlet cavity, form an annular centrifugal cavity located on the end side of the output cavity and around the latter with the possibility of communicating the centrifugal cavity with the outlet annular cavity by means of at least one radial hole made in its wall. A condensation annular cavity is formed in the housing outside the rotor. Radial through channels are made in rotor hub to feed cooling liquid from centrifugal cavity to condensation one.

EFFECT: higher efficiency of machine operation.

9 cl, 5 dwg