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.

公开(公告)号：US11300086B2

公开(公告)日：2022-04-12

申请号：US15446584

申请日：2017-03-01

Applicant: ROLLS-ROYCE plc

Inventor： Gian Incerpi ,  Edward W Adams

IPC: H02P29/024 ,  F02C7/22 ,  F02M59/20 ,  H02P6/04 ,  F02C9/26 ,  F01D25/20 ,  F02C7/236 ,  H02K9/00 ,  F01M1/02 ,  F02C7/06 ,  F02M37/08

Abstract: A fuel and oil system includes a fuel pump, an oil pump, and a fixed electrical drive. A first electric motor controller of the fuel and oil system supplies a variable electrical drive, and a second electric motor controller supplies a variable electrical drive. The fuel pump is selectively connected to and driven by the first electric motor controller or the second electric motor controller. The oil pump is selectively connected to and driven by the second electric motor controller or the fixed electrical drive.

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：US11139716B2

公开(公告)日：2021-10-05

申请号：US16516796

申请日：2019-07-19

Applicant: ROLLS-ROYCE plc

Inventor： Stephen M. Husband ,  Gian Incerpi

IPC: H02K7/18 ,  F02C9/56 ,  H02P9/02

Abstract: An engine system comprises first and second electrical generators coupled to lower and higher pressure (LP, HP) shafts respectively of a gas turbine engine. A controller is arranged to receive a signal corresponding to a total electrical power demand P1 and to output control signals to the electrical generators in response thereto such that the first and second electrical generators output electrical powers (1−y)P1 and yP1 respectively when P1≤Pm1, where 0.5