US 12,116,899 B2
Variable speed pumping system with electric pump motor generator
Christopher A Murray, Nottingham (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Nov. 18, 2022, as Appl. No. 17/990,488.
Claims priority of application No. 2118357 (GB), filed on Dec. 17, 2021.
Prior Publication US 2023/0193776 A1, Jun. 22, 2023
Int. Cl. F01D 15/08 (2006.01); F01D 15/10 (2006.01)
CPC F01D 15/08 (2013.01) [F01D 15/10 (2013.01); F05D 2220/323 (2013.01); F05D 2260/4023 (2013.01); F05D 2260/60 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A blower system for supplying air to an aircraft system, comprising:
an air compressor for compressing air for delivery to an aircraft system; and
a transmission having an input mechanically couplable with a gas turbine engine spool and an output mechanically coupled with the air compressor,
wherein the transmission comprises a variable speed pumping system comprising:
a first electrical machine comprising an electrical machine rotor shaft mechanically couplable to the spool of the gas turbine engine and electrical machine stator coils, the first electrical machine being a motor-generator; and
an electric pump motor-generator comprising an electric pump rotor shaft mechanically connected to the electrical machine rotor shaft via a one way drive arrangement and electric pump stator coils,
wherein the electric pump rotor shaft is mechanically connected to a fluid pumping system, and
wherein the air compressor is distinct from the fluid pumping system.