US 11,859,558 B2
Device for driving a generator of an aircraft turbomachine and method for regulating the speed of such a generator
Huguette De Wergifosse, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/619,362
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jul. 23, 2020, PCT No. PCT/FR2020/051353
§ 371(c)(1), (2) Date Dec. 15, 2021,
PCT Pub. No. WO2021/019163, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1908553 (FR), filed on Jul. 26, 2019.
Prior Publication US 2022/0260019 A1, Aug. 18, 2022
Int. Cl. F02C 7/32 (2006.01); F02C 7/36 (2006.01); F16H 1/28 (2006.01); F16H 57/02 (2012.01); F16H 61/66 (2006.01)
CPC F02C 7/32 (2013.01) [F02C 7/36 (2013.01); F05D 2220/323 (2013.01); F05D 2220/76 (2013.01); F05D 2220/766 (2013.01); F05D 2220/7644 (2013.01); F05D 2260/403 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/53 (2013.01); F05D 2270/023 (2013.01); F05D 2270/024 (2013.01); F05D 2270/04 (2013.01); F16H 1/2845 (2013.01); F16H 2057/02034 (2013.01); F16H 2061/6602 (2013.01); F16H 2718/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A driving 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;
control means configured to control said first and second electric motors, said 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 are 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 being coupled to the input shaft of the integrated generator, and a third one of said three elements being suitable to be driven in rotation by said first electric motor,
and wherein said control means are configured to change a rotational speed of the third one of said three elements so that the second one of said three elements is driven in rotation at a constant speed.