Patent ID: 11859558
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 9:
10. A device for driving an input shaft of an integrated generator of an aircraft turbomachine from an output shaft of an accessory gear box of the turbomachine, the driving device comprising:
first and second electric motors each being a motor/generator, the first and second electric motors being arranged to transfer electrical power from one to the other; and
an epicyclic reduction gear train comprising three elements:
a central planetary gear,
an external ring gear, and
a planet carrier
wherein said planet carrier carries planet gears which mesh with said central planetary gear and said external ring gear,
wherein said three elements being rotatable about an axis of the epicyclic reduction gear train, a first one of said three elements being coupled to the output shaft of the accessory gear box, a second one of said three elements coupled to the input shaft of the integrated generator, and a third one of said three elements being driven in rotation by said first electric motor,

wherein the first and/or second motor is controllable to change a rotational speed of the third of said three elements so that the second of said three elements is driven in rotation at a constant speed.