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.

公开(公告)号：US12224673B2

公开(公告)日：2025-02-11

申请号：US17956968

申请日：2022-09-30

Applicant: ROLLS-ROYCE plc

Inventor： David R. Trainer ,  Francisco Javier Chivite Zabalza ,  Mark Sweet ,  Luke George

IPC: H02M3/335 ,  B64D27/24 ,  H02M1/00 ,  H02M1/32

Abstract: There is provided an electrical power system comprising: a DC voltage source, a DC electrical network, a DC to AC to DC converter having a primary side connected to the DC voltage source and a secondary side connected to the DC electrical network, and a controller configured to control the DC to AC to DC converter, wherein the controller is configured to: monitor an electrical current or voltage between the DC voltage source and the DC electrical network; determine, based on the monitored electrical current or voltage, whether the DC electrical network is in a fault condition; and increase a switching frequency of the primary side of the DC to AC to DC converter in response to a positive determination that the DC electrical network is in a fault condition.

公开(公告)号：US12172763B2

公开(公告)日：2024-12-24

申请号：US18333873

申请日：2023-06-13

Applicant: ROLLS-ROYCE plc

Inventor： David R. Trainer ,  Francisco Javier Chivite Zabalza ,  Mark Sweet ,  Gian Incerpi

IPC: B64D27/24 ,  B64D27/10 ,  H02J1/00 ,  H02M7/219 ,  H02P9/02 ,  B64D27/02

Abstract: The disclosure relates to an electrical power system for connecting an electrical machine to first and second DC networks operating at different voltages. In an embodiment, an electrical power system comprises: an electrical machine having first, second, third and fourth windings; first, second, third and fourth AC:DC power electronics converters each connected to receive an input AC supply from the respective first, second, third and fourth windings, each AC:DC power electronics converter having first and second DC output terminals connecting the AC:DC power electronics converters to first, second and third DC supply output terminals, wherein the first and second windings are arranged to provide an AC supply to the respective first and second AC:DC power electronics converters in quadrature to each other and the third and fourth windings are arranged to provide an AC supply to the respective third and fourth AC:DC power electronics converters in quadrature to each other.

公开(公告)号：US11837894B2

公开(公告)日：2023-12-05

申请号：US17957778

申请日：2022-09-30

Applicant: Rolls-Royce plc

Inventor： David R Trainer ,  Francisco Javier Chivite Zabalza ,  Mark Sweet ,  Gian Incerpi ,  Luke George

IPC: H02J7/00 ,  H02M3/335 ,  B64D27/24

CPC classification number: H02J7/0031 ,  B64D27/24 ,  H02M3/33573 ,  B64D2221/00 ,  H02J2207/20

Abstract: An electrical power system including: an electrical power source, a power electronics converter, an electrical network, a current limiting diode and a controllable circuit interruption device, wherein: the current limiting diode is configured to limit a fault current passing between the electrical power source and the electrical network in a fault condition; and the controllable circuit interruption device is configured to interrupt the fault current in response to a determination that the electrical power system is in the fault condition.

公开(公告)号：US12046894B2

公开(公告)日：2024-07-23

申请号：US17956924

申请日：2022-09-30

Applicant: ROLLS-ROYCE plc

Inventor： David R Trainer ,  Mark Sweet

IPC: H02H9/02 ,  H10N10/17 ,  H10N10/82

CPC classification number: H02H9/025 ,  H10N10/17 ,  H10N10/82

Abstract: There is provided a current limiting diode 200 comprising a gate 206, a source 202, a drain 204 electrically connected to the source by an n-channel or p-channel 220 and a thermoelectric generator 208; wherein the source and the gate are electrically connected by a fill structure 210, and wherein the thermoelectric generator is configured to: generate a thermoelectric voltage by absorbing heat from the n-channel or p-channel and rejecting heat to a heat sink in a current limiting condition; and apply the thermoelectric voltage between the gate and the source.

公开(公告)号：US11873109B2

公开(公告)日：2024-01-16

申请号：US18053015

申请日：2022-11-07

Applicant: ROLLS-ROYCE plc

Inventor： David R. Trainer ,  Francisco Javier Chivite Zabalza ,  Mark Sweet ,  Luke George ,  Gian Incerpi

IPC: B64D27/24 ,  H02J1/10 ,  H02J7/34 ,  H02M3/28

CPC classification number: B64D27/24 ,  H02J1/106 ,  H02J7/34 ,  H02M3/28 ,  B64D2221/00 ,  H02J2310/44

Abstract: The disclosure relates to an electrical power system for providing a stabilised DC voltage to a power bus. Example embodiments include an electrical power system comprising: a DC power bus having first and second DC power bus terminals; an electrical storage unit having first and second terminals, the second terminal connected to the second DC power bus terminal; a DC:DC converter having first and second DC:AC converters and a transformer connected between the first and second DC:AC converters, the first DC:AC converter connected between the first terminal of the electrical storage unit and the first DC power bus terminal; and a controller connected to control a switching operation of one or both of the first and second DC:AC converters.