US 12,435,665 B2
Blower system
Christopher A Murray, Nottingham (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Jan. 30, 2025, as Appl. No. 19/041,155.
Claims priority of application No. 2402555 (GB), filed on Feb. 23, 2024.
Prior Publication US 2025/0270952 A1, Aug. 28, 2025
Int. Cl. F02C 6/06 (2006.01); B64D 13/02 (2006.01)
CPC F02C 6/06 (2013.01) [B64D 13/02 (2013.01); F05D 2220/323 (2013.01); F05D 2220/76 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A blower system for supplying pressurized air to an airframe of an aircraft, the blower system comprising:
an air inlet for receiving air from an air source;
an air outlet for supplying pressurized air to the airframe;
a blower compressor in fluid communication with the air inlet and the air outlet, the blower compressor comprising a first rotor and a second rotor, wherein the first and second rotors are independently rotatable in order to compress air received from the air inlet and deliver the compressed air to the air outlet;
a variable transmission comprising a first output for driving the first rotor, a second output for driving the second rotor, and first, second and third inputs; and
first and second electrical machines, each comprising an electric rotor and an electric stator, wherein:
the first input of the variable transmission is configured to be mechanically coupled to a spool of a gas turbine engine;
the second input of the variable transmission is mechanically coupled to the electric rotor of the first electrical machine;
the third input of the variable transmission is mechanically coupled to the electric rotor of the second electrical machine; and
the electric stators of the first and second electrical machines are electrically connected to an electrical power management system configured to control the supply of electrical power to the first and second electrical machines in order to control the speed of the first and second outputs of the variable transmission.