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：US10951101B2

公开(公告)日：2021-03-16

申请号：US15357647

申请日：2016-11-21

Applicant: ROLLS-ROYCE plc

Inventor： James Emberton ,  Alexis Lambourne ,  John J A Cullen

IPC: H02K17/16 ,  H02K15/00 ,  H02K1/26 ,  H02K3/32 ,  H02K3/48 ,  H02K15/02 ,  H02K15/09 ,  B23K20/12

Abstract: A method of manufacturing an induction motor rotor assembly, the method includes the steps of: providing a rotor; machining a plurality of re-entrant slots axially along an outer surface of the rotor; positioning a sleeve concentrically over the outer surface of the rotor; applying a friction stir welding process to the sleeve along each re-entrant slot axially along the outer surface of the rotor to cause the sleeve material to plasticise and flow into the axial re-entrant slot to form an axial re-entrant slot bar; and providing an electrical connection at each of the opposing axial ends of the rotor between respective ones of opposing ends of each of the axial re-entrant slot bars to thereby form the induction motor rotor.

公开(公告)号：US10485145B2

公开(公告)日：2019-11-19

申请号：US15285823

申请日：2016-10-05

Applicant: ROLLS-ROYCE plc

Inventor： John J A Cullen

IPC: H05K7/20 ,  H01B12/16 ,  H02G3/04 ,  H02G15/34

Abstract: This invention concerns a cryo-cooled electrical conduction network. The conduction network has an electrical network divided into two or more conductive sections, each section comprising electrical equipment (24, 28). The conductive network also has a coolant network for maintaining the temperature of a coolant in each section. The electrical equipment (24, 28) and a corresponding portion of the coolant network of each section is housed in a section enclosure (10, 12, 14). The coolant network includes a coolant interface (40) located between each section, wherein the coolant interface (40) is housed in an intermediate enclosure (16, 18, 20, 22) that is isolatable from the section enclosures (10, 12, 14) in the electrical conduction network.