公开(公告)号：US12283399B2

公开(公告)日：2025-04-22

申请号：US17843173

申请日：2022-06-17

Applicant: ROLLS-ROYCE plc

Inventor： Lujia Chen ,  Ian Cotton ,  Alexander C Smith ,  Jameel B Khan

IPC: H01B3/02 ,  B64D27/02 ,  B64D27/24 ,  H01B3/56

Abstract: An electrically insulating gas composition comprises C3F7CN, in an amount between 22% and 70% by volume and one or more inert gas selected from the list consisting of nitrogen, carbon dioxide (CO2), air and argon.

公开(公告)号：US11152844B2

公开(公告)日：2021-10-19

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.

公开(公告)号：US10680503B2

公开(公告)日：2020-06-09

申请号：US15204443

申请日：2016-07-07

Applicant: ROLLS-ROYCE plc

Inventor： Stephen Williamson ,  Alexander C Smith ,  John J A Cullen ,  Ellis F H Chong

IPC: H02K55/00 ,  H02K11/01 ,  H02K55/02 ,  H02K55/04 ,  H02K3/28

Abstract: An electrical machine including a rotor and a stator, at least one of the rotor and stator being provided with superconducting first electrical windings; and a set of one or more screen electrical windings, provided in the form of one or more further superconducting electrical windings, arranged around and radially outward of the first electrical windings; wherein the set of screen electrical windings is arranged to be supplied with an electrical current for generating a magnetic field of suitable magnitude and phase to reduce the magnitude of the magnetic field, generated at least by the first electrical windings during operation of the electrical machine, radially outwards of the screen electrical windings.

公开(公告)号：US10131441B2

公开(公告)日：2018-11-20

申请号：US15136074

申请日：2016-04-22

Applicant: ROLLS-ROYCE PLC

Inventor： Huw L. Edwards ,  Alexander C Smith ,  Judith M. Apsley ,  Charalampos Manolopoulos

IPC: B64D27/02 ,  B64D35/02 ,  B64D27/24

Abstract: An electrical network for an aircraft. The aircraft includes at least one variable pitch propulsor. The electrical network includes a wound field synchronous AC electrical generator having a wound rotor driven by an internal combustion engine. The network further includes a voltage regulator configured to regulate output voltage of the electrical generator by regulating rotor winding magnetic field strength, and a synchronous AC drive motor coupled to a respective variable pitch propulsor and provided with power from the output of the electrical generator.