Patent ID: 11858644
Assignee: ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 0:
1. A drive device for an aircraft, the drive device comprising:
an electric machine having a stator and a rotor; and
a cooling device operable to cool the electric machine,
wherein the cooling device has an enclosed first cooling region in which a first cooling liquid for cooling the stator, the rotor, or the stator and the rotor is located,
wherein the cooling device has a second cooling region that is separate from the first cooling region and in which a second cooling liquid is located,
wherein the cooling device includes an internal heat exchanger operable to transfer heat from the first cooling liquid to the second cooling liquid,
wherein the internal heat exchanger is arranged inside a housing of the electric machine, and
wherein the electric machine includes a split tube between the stator and the rotor, and the first cooling region extends from the split tube to a wall of the internal heat exchanger.