US 12,244,209 B2
Aircraft powerplant with boosted gas turbine engine
Paul R. Hanrahan, Sedona, AZ (US); and Daniel B. Kupratis, Wallingford, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jun. 8, 2023, as Appl. No. 18/207,522.
Prior Publication US 2024/0413704 A1, Dec. 12, 2024
Int. Cl. F02C 6/20 (2006.01); B64D 27/10 (2006.01); F02C 7/32 (2006.01); F02C 7/36 (2006.01); H02K 7/102 (2006.01); H02K 7/116 (2006.01); H02K 7/18 (2006.01)
CPC H02K 7/102 (2013.01) [B64D 27/10 (2013.01); F02C 7/32 (2013.01); F02C 7/36 (2013.01); H02K 7/116 (2013.01); H02K 7/1823 (2013.01); F05D 2220/323 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aircraft system, comprising:
a first turbine engine including a first rotating assembly, a first flowpath, a first compressor section, a first combustor section and a first turbine section, the first flowpath extending through the first compressor section, the first combustor section and the first turbine section from a first inlet into the first flowpath to a first exhaust from the first flowpath, and the first combustor section comprising a first combustor;
a second turbine engine including a second rotating assembly, a second flowpath, a second compressor section, a second combustor section and a second turbine section, the second flowpath extending through the second compressor section, the second combustor section and the second turbine section from a second inlet into the second flowpath to a second exhaust from the second flowpath, and the second inlet and the second exhaust each fluidly coupled with the first flowpath upstream of the first combustor; and
an electrical system including a clutch, a first electric machine and a second electric machine electrically coupled to the first electric machine, the first electric machine mechanically coupled to the first rotating assembly, and the second electric machine mechanically coupled to the second rotating assembly through the clutch;
wherein the electrical system is configured to draw more electrical power from the second electric machine than the first electric machine when a working fluid temperature is below a first threshold.