US 11,988,138 B2
Hybrid propulsion system with integrated air-cooling system
Viktor Kilchyk, Lancaster, NY (US); and Debabrata Pal, Hoffman Estates, IL (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Sep. 13, 2022, as Appl. No. 17/943,830.
Prior Publication US 2024/0084732 A1, Mar. 14, 2024
Int. Cl. F02C 6/20 (2006.01); F02C 3/06 (2006.01)
CPC F02C 6/20 (2013.01) [F02C 3/06 (2013.01); F05D 2220/323 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An air cooling system comprising:
a compressed air source for a thermal combustor, the thermal combustor in communication with a turbine; and
an electric motor or generator in communication with an electric turbine;
wherein the air cooling system is configured to direct a portion of air from the compressed air source to a heat exchanger via a first passageway and then to the electric turbine; and
wherein the air cooling system is configured to direct a portion of expanded air via a second passageway from the electric turbine to the electric motor or generator for cooling of the electric motor or generator;
wherein the air cooling system is configured to direct discharge air from the cooled electric motor or generator via a third passage way to the thermal combustor.