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

Claim 0:
1. 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 one or more alternating magnetic field harmonic frequencies causing an eddy current loss in a rotor assembly including both the plurality of segmented magnets and the plurality of segmented metallic bands;
determining a first axial length of each segment of the plurality of segmented bands that reduces the eddy current loss of the rotor assembly; and
determining a second number of segments of the plurality of segmented metallic bands based on the first axial length.