US 12,258,135 B2
Aircraft hybrid propulsion fan drive gear system dc motors and generators
Daniel Bernard Kupratis, Wallingford, CT (US); Frederick M. Schwarz, Glastonbury, CT (US); William G. Sheridan, Southington, CT (US); and Glenn Levasseur, Colchester, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX CORPORATION, Farmington, CT (US)
Filed on Jan. 31, 2023, as Appl. No. 18/103,935.
Application 18/103,935 is a division of application No. 17/376,675, filed on Jul. 15, 2021, granted, now 11,597,527.
Application 17/376,675 is a division of application No. 16/039,849, filed on Jul. 19, 2018, granted, now 11,091,272, issued on Aug. 17, 2021.
Prior Publication US 2023/0182909 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F02C 6/14 (2006.01); B64D 27/10 (2006.01); B64D 27/24 (2006.01); F01D 15/10 (2006.01); F02C 7/36 (2006.01); H02K 7/18 (2006.01); B64D 27/02 (2006.01); F02C 3/107 (2006.01); F02C 6/02 (2006.01)
CPC B64D 27/24 (2013.01) [B64D 27/10 (2013.01); F01D 15/10 (2013.01); F02C 6/14 (2013.01); F02C 7/36 (2013.01); H02K 7/1823 (2013.01); B64D 27/026 (2024.01); B64D 2221/00 (2013.01); F02C 3/107 (2013.01); F02C 6/02 (2013.01); F05D 2220/76 (2013.01); F05D 2260/42 (2013.01); F05D 2270/053 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An aircraft propulsion system comprising:
a first gas turbine engine including a first input shaft driving a first gear system, a first fan supported on a first fan shaft driven by the first gear system, a first generator supported on the first input shaft and a first fan drive electric motor providing a main drive input to the first fan, wherein the first fan drive electric motor is electrically coupled and clocked relative to the first generator such that rotation of the first input shaft provides for commutation of phases of the first fan drive electric motor;
a second gas turbine engine including a second input shaft driving a second gear system, a second fan supported on a second fan shaft driven by the second gear system, a second generator supported on the second input shaft and a second fan drive electric motor providing a drive input to the second fan, wherein the second fan drive electric motor is electrically coupled and clocked relative to the second generator such that rotation of the second input shaft provides for commutation of phases of the second fan drive electric motor,
each of the first generator and the second generator includes a first rotor, a second rotor and a third rotor, supported on the corresponding one of the first input shaft and the second input shaft and include corresponding sets of poles providing power to a first phase, a second phase and a third phase of a corresponding one of the first fan drive electric motor and the second fan drive electric motor,
wherein each of the first fan drive electric motor and the second fan drive electric motor includes a rotor supported on a corresponding one of the first fan shaft and the second fan shaft with poles clocked relative to a corresponding one of the poles of the first generator and the second generator such that rotation of the corresponding one of the first input shaft and the second input shaft combined with a difference in relative speeds with the corresponding one of the first fan shaft and the second fan shaft commutates the first phase, the second phase and the third phase to drive the rotor of the corresponding one of the first fan drive electric motor and the second fan drive electric motor; and
a controller controlling power output from each of the first generator and the second generator and directing the power output between each of the first fan drive electric motor and the second fan drive electric motor.