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    METHODS AND APPARATUS FOR CONTROLLING AT LEAST PART OF A START-UP OR RE-LIGHT PROCESS OF A GAS TURBINE ENGINE
    1.
    发明申请
    METHODS AND APPARATUS FOR CONTROLLING AT LEAST PART OF A START-UP OR RE-LIGHT PROCESS OF A GAS TURBINE ENGINE 审中-公开

    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.

    METHODS AND APPARATUS FOR CONTROLLING AT LEAST PART OF A START-UP OR RE-LIGHT PROCESS OF A GAS TURBINE ENGINE
    5.
    发明申请
    METHODS AND APPARATUS FOR CONTROLLING AT LEAST PART OF A START-UP OR RE-LIGHT PROCESS OF A GAS TURBINE ENGINE 审中-公开

    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.

    SUPERCONDUCTING FAULT CURRENT LIMITER
    6.
    发明申请
    SUPERCONDUCTING FAULT CURRENT LIMITER 审中-公开

    公开(公告)号：US20190312428A1

    公开(公告)日：2019-10-10

    申请号：US16299765

    申请日：2019-03-12

    Applicant: ROLLS-ROYCE plc

    Inventor： Chloe J. PALMER ,  Stephen M. HUSBAND

    IPC: H02H9/02 ,  H01L39/16 ,  H01F6/02

    Abstract: A superconducting fault current limiter (10) is shown. It comprises a cryostatic cooling system (20) for containing a cooling medium (26), a superconducting wire (30) immersed in the cooling medium (26) and configured to carry a current, the superconducting wire (30) becoming non-superconducting above a critical current density, and a plurality of heat dissipation elements spaced along and projecting from the superconducting wire (30), wherein the heat dissipation elements have an electrically insulating coating, and whereby the heat dissipation elements transfer heat from the superconducting wire (30) into the cooling medium (26).

    RESTARTING A GAS TURBINE ENGINE
    7.
    发明公开
    RESTARTING A GAS TURBINE ENGINE 审中-公开

    公开(公告)号：US20230184130A1

    公开(公告)日：2023-06-15

    申请号：US17988393

    申请日：2022-11-16

    Applicant: ROLLS-ROYCE plc

    Inventor： Gareth E. MOORE ,  Paul R. DAVIES ,  Stephen M. HUSBAND ,  David R. TRAINER ,  David P. SCOTHERN ,  Luke GEORGE ,  Douglas M M HERBERT

    IPC: F01D15/10 ,  F02C7/32

    CPC classification number: F01D15/10 ,  F02C7/32

    Abstract: Aircraft power and propulsion systems, aircraft comprising such power and propulsion systems, and methods of restarting a gas turbine engine of such power and propulsion systems during flight are provided. One such aircraft power and propulsion system comprises: a propulsive gas turbine engine comprising a plurality of spools, combustion equipment, one or more electric machines mechanically coupled with one or more of the spools and an electrically-powered fuel pump for delivering fuel to the combustion equipment; an electrical system connected with the one or more electric machines and the electrically-powered fuel pump, the electrical system comprising an energy storage system; and a control system configured to: responsive to a determination to the effect that a flame in the combustion equipment has been extinguished, control the electrical system to supply electrical power from the energy storage system to the fuel pump during an engine restart attempt.

    ELECTRIC DRIVE SYSTEMS
    9.
    发明申请
    ELECTRIC DRIVE SYSTEMS 有权

    公开(公告)号：US20220131435A1

    公开(公告)日：2022-04-28

    申请号：US17572242

    申请日：2022-01-10

    Applicant: ROLLS-ROYCE plc

    Inventor： Stephen M. HUSBAND ,  Jeffrey HOBDAY

    IPC: H02K3/28 ,  H02K3/42 ,  H02K7/18 ,  H02P25/22 ,  H02K21/48 ,  H02K21/16

    Abstract: Fault-tolerant electric drive systems including a machine having a rotor and a stator having coils arranged in pairs. Each coil in each pair separated by 180 degrees, a first phase (ϕA) having one of the coil pairs and a phase drive circuit connected therewith, a second phase (ϕB) having a second one of the coil pairs and a second phase drive circuit connected therewith, a third phase (ϕC) having a third one of the coil pairs and a third phase drive circuit connected therewith, and a fourth phase having a fourth one of the coil pairs and a fourth phase drive circuit connected therewith. Further included is a controller connected with the first, second, third and fourth phase drive circuits to control operation thereof.

    ELECTRIC DRIVE SYSTEMS
    10.
    发明申请
    ELECTRIC DRIVE SYSTEMS 有权

    公开(公告)号：US20210075285A1

    公开(公告)日：2021-03-11

    申请号：US17007436

    申请日：2020-08-31

    Applicant: ROLLS-ROYCE plc

    Inventor： Stephen M. HUSBAND ,  Jeffrey HOBDAY

    IPC: H02K3/28 ,  H02K1/16 ,  H02K3/14 ,  H02K3/24 ,  H02K3/42 ,  H02K3/493 ,  H02K7/18 ,  H02K9/19 ,  H02K21/14 ,  B64D27/10 ,  B64D27/24 ,  F02C7/266

    Abstract: Fault-tolerant four-phase electric drive systems are provided. One such system comprises: a rotary electric machine having a permanent magnet rotor and an alternate-wound stator having eight evenly-spaced coils arranged in pairs, each coil in each pair being separated by 180 degrees; a first phase (ΦA) comprising a first one of the coil pairs and a first phase drive circuit connected therewith; a second phase (ΦB) separated by +45 degrees from the first phase and comprising a second one of the coil pairs and a second phase drive circuit connected therewith; a third phase (ΦC) separated by +90 degrees from the first phase and comprising a third one of the coil pairs and a third phase drive circuit connected therewith; a fourth phase (ΦD) separated by +135 degrees from the first phase and comprising a fourth one of the coil pairs and a fourth phase drive circuit connected therewith; and a controller connected with the first, second, third and fourth phase drive circuits to control operation thereof.

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