公开(公告)号：US20230182918A1

公开(公告)日：2023-06-15

申请号：US17988538

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: B64D31/06 ,  B64D27/24 ,  F01D15/10 ,  B64D27/10

CPC classification number: B64D31/06 ,  B64D27/24 ,  F01D15/10 ,  B64D27/10 ,  B64D2027/026

Abstract: Aircraft power and propulsion systems and methods of operating the systems, one method includes: operating electric machines of gas turbine engines as generators to extract mechanical power from spools and generating electrical power therefrom; meeting an electrical power demand of a plurality of electrical loads connected with an electrical system by supplying the plurality of electrical loads with electrical power generated by the electric machines; determining when there is an electrical system and/or the gas turbine engine fault and an amount of electrical power generated by the power and propulsion system is reduced to a lower level; and responsive to the determination: during a time period ΔT, controlling the plurality of electrical loads reducing the electrical power demand; and during the time period ΔT, meeting at least part of the electrical power demand of the plurality of electrical loads by discharging the electrical energy storage system.

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

IPC: F02C3/113 ,  H02J9/06 ,  B64D27/24

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：US20230167785A1

公开(公告)日：2023-06-01

申请号：US17940421

申请日：2022-09-08

Applicant: ROLLS-ROYCE plc

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

IPC: F02K3/06 ,  F01D15/10

CPC classification number: F02K3/06 ,  F01D15/10 ,  F05D2220/36 ,  F05D2220/323

Abstract: A gas turbine engine for an aircraft comprises, in axial flow sequence, a compressor module, a combustor module, and a turbine module, with a first electric machine being rotationally connected to the turbine module. The first electrical machine is configured to generate a maximum electrical power PEM1 (W), and the gas turbine engine is configured to generate a maximum dry thrust T (N); and a ratio S of:


S=(Maximum Electrical Power Generated=PEM1)/(Maximum Dry Thrust=T)

is in a range of between 2.0 and 10.0.

公开(公告)号：US20220037979A1

公开(公告)日：2022-02-03

申请号：US17504151

申请日：2021-10-18

Applicant: ROLLS-ROYCE plc

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

公开(公告)号：US20230182920A1

公开(公告)日：2023-06-15

申请号：US17988341

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: B64D35/02 ,  B64D27/10 ,  B64D27/24 ,  B64D31/06

CPC classification number: B64D35/02 ,  B64D27/10 ,  B64D27/24 ,  B64D31/06 ,  B64D2027/026

Abstract: A twin-engine aircraft power and propulsion system including first and second propulsive gas turbine engines, each having combustion equipment and a first and second spool; first, second, third, and fourth electrical power generation sub-systems including electric machines respectively mechanically coupled with the first spool of the first propulsive gas turbine engine, the second spool of the first propulsive gas turbine engine, the first spool of the second propulsive gas turbine engine, and the second spool of the second propulsive gas turbine engine; and first, second, third, and fourth power channels respectively connected with distribution sides of the first electric machine, second electric machine, third electric machine, and fourth electric machine.

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.