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公开(公告)号：US20210071573A1
公开(公告)日：2021-03-11
申请号：US17002086
申请日：2020-08-25
Applicant: ROLLS-ROYCE plc
Inventor： David F BROOKES , Graham P BRUCE , Stephen M HUSBAND
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.
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公开(公告)号：US20200183790A1
公开(公告)日：2020-06-11
申请号：US16701731
申请日：2019-12-03
Applicant: ROLLS-ROYCE plc
Inventor： David F BROOKES
IPC: G06F11/14 , G06F1/26 , G05B19/045
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.
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公开(公告)号：US20210126567A1
公开(公告)日：2021-04-29
申请号：US17061140
申请日：2020-10-01
Applicant: ROLLS-ROYCE plc
Inventor： Mark SWEET , David F BROOKES
IPC: H02P9/42 , F02C7/06 , F02C6/00 , 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.
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公开(公告)号：US20190074739A1
公开(公告)日：2019-03-07
申请号：US16041148
申请日：2018-07-20
Applicant: ROLLS-ROYCE PLC
Inventor： David F BROOKES
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.
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