Patent ID: 11870305
Assignee: ROLLS-ROYCE SINGAPORE PTE. LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method comprising:
selecting a first number of segments of a plurality of segmented metallic bands that is greater than a number of segments of a plurality of magnet segments, wherein the plurality of segmented magnets are configured to be disposed about an outer surface of a rotor core, wherein the plurality of segmented metallic bands are configured to secure the plurality of segmented magnets to the outer surface of the rotor core;
determining a first axial length of each segment of the plurality of segmented bands that reduces an eddy current loss of a rotor assembly including both the plurality of segmented magnets and the plurality of segmented metallic bands; and
determining a second number of segments of the plurality of segmented metallic bands based on the first axial length,
wherein a ratio of the first number of segments of the plurality of segmented metallic bands to the number of segments of the plurality of magnet segments is based on the electrical conductivities and the relative permeabilities of the plurality of segmented metallic bands and the plurality of magnet segments.