公开(公告)号：US20200173368A1

公开(公告)日：2020-06-04

申请号：US16679576

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. HUSBAND ,  Ahmed M Y RAZAK ,  Paul R. MILLER

IPC: F02C7/262 ,  F02C7/266

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: controlling ignition within a combustion chamber of the gas turbine engine; controlling rotation of a low pressure compressor using a first electrical machine, and controlling rotation of a high pressure compressor using a second electrical machine, the combustion chamber downstream of the low pressure compressor and high pressure compressor; determining if an exit pressure of the high pressure compressor is equal to or greater than a self-sustaining threshold pressure; and in response to determining that the exit pressure of the high pressure compressor is equal to or greater than the self-sustaining threshold pressure, ceasing controlling rotation of the low pressure compressor using the first electrical machine, and/or the high pressure compressor using a second electrical machine.

公开(公告)号：US20200173369A1

公开(公告)日：2020-06-04

申请号：US16679562

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. HUSBAND ,  Ahmed M Y. RAZAK ,  Paul R. MILLER

IPC: F02C7/275 ,  F02C7/26 ,  F02C7/262

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: determining when a flame in a combustion chamber of a gas turbine engine is extinguished, during a start-up process or re-light process or during operation; purging the combustion chamber by controlling rotation of a low pressure compressor using a first electrical machine, and controlling rotation of a high pressure compressor using a second electrical machine, the combustion chamber downstream of the low pressure compressor and high pressure compressor; and controlling rotation of the low pressure compressor using the first electrical machine, and controlling rotation of the high pressure compressor using the second electrical machine to restart the start-up process or perform the re-light process.

公开(公告)号：US20200173367A1

公开(公告)日：2020-06-04

申请号：US16679568

申请日：2019-11-11

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. HUSBAND ,  Ahmed M.Y. RAZAK ,  Paul R. MILLER

IPC: F02C7/26 ,  F02C3/06 ,  F02C9/22

Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: increasing an angular velocity of a low pressure compressor; determining if an exit pressure of the low pressure compressor is equal to or greater than a first threshold pressure; in response to determining that the exit pressure of the low pressure compressor is equal to or greater than the first threshold pressure, controlling rotation of the low pressure compressor using a first electrical machine and controlling rotation of a high pressure compressor using a second electrical machine, to increase angular velocity of the high pressure compressor; determining if an exit pressure of the high pressure compressor is equal to or greater than a second threshold pressure.

公开(公告)号：US20200091810A1

公开(公告)日：2020-03-19

申请号：US16548032

申请日：2019-08-22

Applicant: ROLLS-ROYCE plc

Inventor： Paul R. MILLER ,  Stephen M HUSBAND ,  Alexander C SMITH ,  Charalampos MANOLOPOULOS ,  Matteo IACCHETTI

IPC: H02K55/04 ,  H02K3/02 ,  H02K3/14 ,  H02K3/42 ,  H02K7/18 ,  B64D27/24 ,  B64D27/02

Abstract: An electric machine including a stator having a fully non-magnetic core and stator windings formed of a non-superconducting transposed conductor to reduce eddy current losses. It further includes a rotor having a fully non-magnetic core and superconducting windings or superconducting magnets which produce a magnetic field for interaction with the stator windings. A cryogenic cooling system is arranged to cool the stator windings to reduce conduction losses in the stator windings.