公开(公告)号：US11646579B2

公开(公告)日：2023-05-09

申请号：US17001990

申请日：2020-08-25

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M Husband ,  Jeffrey Hobday ,  Graham P Bruce ,  David F Brookes

IPC: B64D35/02 ,  H02K7/18 ,  H02M7/04 ,  F02C7/36 ,  H02J1/10 ,  F02C6/20 ,  F01D15/10

CPC classification number: H02J1/102 ,  B64D35/02 ,  F02C7/36 ,  H02K7/1823 ,  B64D2221/00 ,  F01D15/10 ,  F02C6/206 ,  F05D2220/76 ,  Y02T50/50 ,  Y02T50/60

Abstract: Electrical systems for connecting rotary electric machines with gas turbine spools are provided. One such electrical system includes: a first rotary electric machine; a second rotary electric machine; a first set of bidirectional converter circuits; a second set of bidirectional converter circuits; and DC outputs for connection with an R-channel network. Each electrical machine is mechanically coupled with a respective gas turbine spool and has an identical even number N≥4 of phases, each phase having a respective index and including an identical number P≥1 of coils wound in a P-plex configuration in which adjacent phases are radially separated by 2π/NP mechanical radians. Each of the first and second converter circuits converts AC to and from DC, has a respective index n, and is connected with the P coils in the nth phase of the first and second rotary electric machines, respectively.

公开(公告)号：US11512644B2

公开(公告)日：2022-11-29

申请号：US17369332

申请日：2021-07-07

Applicant: ROLLS-ROYCE plc

Inventor： Graham P Bruce ,  Stephen M Husband ,  David F Brookes

IPC: F02C7/268

Abstract: Gas turbine engines and methods of starting gas turbine engines, the gas turbine engine including: an electronic engine controller; one or more spools designated a starting spool for starting the engine, and has a required starting torque τs; a permanent magnet alternator mechanically coupled with the starting spool, the alternator, in a motor mode, provides a peak torque of τa, and, in a generator mode, generates electrical power for the electronic engine controller; and an electrical starter-generator mechanically coupled with the starting spool. The starter-generator in a motor mode, provides a peak torque of τsg, and, in a generator mode, generates electrical power for an external load. τsg+τa≥τs and τsg, τa

公开(公告)号：US11025112B2

公开(公告)日：2021-06-01

申请号：US16041148

申请日：2018-07-20

Applicant: ROLLS-ROYCE PLC

Inventor： David F Brookes

IPC: H02K1/28 ,  H02K1/27 ,  H02K7/18 ,  F01D15/10 ,  H02K15/03

Abstract: A rotor for an electrical machine is provided. The rotor comprises: a rotor body; one or more magnets arranged around the rotor body; and a non-magnetic containment sleeve positioned radially outwardly of the one or more magnets. The containment sleeve has axially-alternating solid ring sections and reticulated ring sections.

公开(公告)号：US11532937B2

公开(公告)日：2022-12-20

申请号：US17002086

申请日：2020-08-25

Applicant: ROLLS-ROYCE plc

Inventor： David F Brookes ,  Graham P Bruce ,  Stephen M Husband

IPC: H02J1/10 ,  F02C3/113 ,  H02J3/14 ,  H02M1/10 ,  F02C7/36

Abstract: Electrical systems for connecting rotary electric machines with gas turbine spools are provided. One such electrical system comprises: a first rotary electric machine mechanically coupled with a first gas turbine spool and a second rotary electric machine mechanically coupled with a second gas turbine spool, each said electric machine having an identical even number N≥4 of phases, each phase having a respective index n=(1, . . . , N), and each phase comprising an identical number P≥1 of coils wound in a P-plex configuration in which adjacent phases are radially separated by 2π/NP mechanical radians; a first set of N bidirectional converter circuits for conversion of alternating current (ac) to and from direct current (dc), each converter circuit having a respective index n and being connected with the P coils in the nth phase of the first rotary electric machine; and a second set of N bidirectional converter circuits for conversion of ac to and from dc, each converter circuit having a respective index n and being connected with the P coils in the nth phase of the second rotary electric machine. For all n, a dc side of the nth converter circuit in said first set is connected with a dc side of the nth converter circuit in said second set to facilitate dc power transfer between the first gas turbine spool and the second gas turbine spool.

公开(公告)号：US11492135B2

公开(公告)日：2022-11-08

申请号：US16990097

申请日：2020-08-11

Applicant: ROLLS-ROYCE plc

Inventor： David F Brookes ,  Graham P Bruce

IPC: B64D45/00 ,  B64D37/32 ,  B64F5/60

Abstract: A power electronics unit for an aircraft and a method of determining the integrity of a power electronics unit are provided. The power electronics unit comprises an electric machine controller; a heatsink arranged to conduct heat from the electric machine controller; a housing comprising a sealed internal volume enclosing the electric machine controller and heatsink; a dielectric liquid partially filling the internal volume to cover the electric machine controller; a gas pocket within the internal volume; a pressure sensor arranged to measure a pressure of gas within the gas pocket; a temperature sensor arranged to measure a temperature within the internal volume; and a controller. The controller is configured to receive signals from the pressure sensor and temperature sensor, determine a pressure and temperature from the received signals and provide an output signal dependent on the determined temperature and pressure.

公开(公告)号：US11409609B2

公开(公告)日：2022-08-09

申请号：US16701731

申请日：2019-12-03

Applicant: ROLLS-ROYCE plc

Inventor： David F Brookes

IPC: G06F11/14 ,  G05B19/045 ,  G06F1/26 ,  G06F11/07 ,  G06F11/30

Abstract: A multi-logic device system, an electronic engine controller, and a method of operating the multi-logic device system. The multi-logic device system includes a primary logic device which is more resilient to single event effects, and one or more secondary logic devices, each secondary logic device being powered by a respective power supply unit and being more susceptible to single event effects. The primary logic device is configured to run, for each secondary logic device, a respective watchdog timer. Each watchdog timer is restarted upon receipt of a restart signal from the respective secondary logic device. The primary logic device is also configured, in response to a watchdog timer timing out, to identify and reset the secondary logic device corresponding to the timed out watchdog timer.

公开(公告)号：US11316458B2

公开(公告)日：2022-04-26

申请号：US17061140

申请日：2020-10-01

Applicant: ROLLS-ROYCE plc

Inventor： Mark Sweet ,  David F Brookes

IPC: H02P9/42 ,  F02C6/00 ,  F02C7/06 ,  F02C3/10 ,  H02P101/25 ,  H02P103/20

Abstract: A turboelectric generator system includes a gas turbine engine which includes, in fluid flow series, a gas-generator compressor, a combustor, a gas-generator turbine, and a variable-speed free power turbine. The system further comprises a variable-frequency electric machine rotatably connected with the free power turbine and a power converter configured to convert a variable frequency electrical output from the electric machine to a fixed frequency output.