Patent ID: 11952134
Assignee: AIRBUS SAS
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. An electric propulsion unit of an aircraft comprising:
at least one electric power system,
at least one electric motor powered by the electric power system and comprising an output shaft,
a propeller driven in rotation by the electric motor,
a cooling system for the electric power system comprising a main cooling circuit which comprises:
a main air inlet,
at least one intake duct,
at least one main heat exchanger thermally connected to the electric power system,
at least an exhaust duct,
a main air outlet,

a nacelle housing the electric power system and the electric motor and comprising:
a central fairing,
a front fairing which extends from the central fairing to a front end, and
a rear fairing which extends from the central fairing to a rear end,

wherein the front fairing comprises a protrude positioned in a lower part of the front fairing, said protrude having a front face located in a transverse plane perpendicular to the output shaft, the main air inlet being positioned on the front face,
wherein the main cooling circuit is sized for the cooling needs of the electric power system during a cruise flight, and
wherein the cooling system comprises at least one secondary cooling circuit which comprises:
a secondary air inlet on a side face of the central fairing,
at least one intake duct,
at least one secondary heat exchanger,
at least one exhaust duct, and
a secondary air outlet aft of the main air outlet,

said at least one secondary cooling circuit being sized to increase a cooling capacity of the cooling system.