US 11,735,965 B2
Rotor assembly
Ellis Fui Hen Chong, Derby (GB); Shanmukha Rama Krishna, Sengkang (SG); and Mark Boden, Derbyshire (GB)
Assigned to Rolls-Royce plc, London (GB); and Rolls-Royce Singapore Pte. Ltd., Singapore (SG)
Filed by Rolls-Royce plc, London (GB); and Rolls-Royce Singapore Pte. Ltd., Singapore (SG)
Filed on Mar. 22, 2021, as Appl. No. 17/208,482.
Prior Publication US 2022/0302779 A1, Sep. 22, 2022
Int. Cl. H02K 1/27 (2022.01); H02K 1/28 (2006.01); H02K 15/03 (2006.01); H02K 1/278 (2022.01); H02K 1/02 (2006.01); H02K 1/04 (2006.01)
CPC H02K 1/278 (2013.01) [H02K 1/02 (2013.01); H02K 1/04 (2013.01); H02K 1/28 (2013.01); H02K 15/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A rotor assembly comprising:
a plurality of segmented magnets on an outer surface of a rotor core;
a metallic layer on the outer surface of the plurality of segmented magnets;
a plurality of segmented metallic bands on the outer surface of the metallic layer and configured to secure the plurality of segmented magnets to the outer surface of the rotor core, wherein each band of the plurality of metallic bands has an axial length less than an axial length of the rotor assembly; and
an electrically insulating layer disposed between the metallic layer and the plurality of segmented metallic bands.