US 12,341,384 B2
Multi-metallic mechanical retention hoop
Edgar S. Thaxton, Groton, MA (US); and Calvin H. Corey, III, Scituate, MA (US)
Assigned to DRS Naval Power Systems, Inc., Menomonee Falls, WI (US)
Filed by DRS Naval Power Systems, Inc., Milwaukee, WI (US)
Filed on Sep. 15, 2022, as Appl. No. 17/945,728.
Claims priority of provisional application 63/244,558, filed on Sep. 15, 2021.
Prior Publication US 2023/0078127 A1, Mar. 16, 2023
Int. Cl. H02K 1/28 (2006.01); H02K 1/27 (2022.01); H02K 1/278 (2022.01); H02K 1/30 (2006.01); H02K 15/03 (2006.01); B33Y 80/00 (2015.01)
CPC H02K 1/30 (2013.01) [H02K 1/278 (2013.01); H02K 15/03 (2013.01); B33Y 80/00 (2014.12)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a rotor;
a plurality of permanent magnets positioned around the rotor;
a plurality of spaces separating each permanent magnet of the plurality of permanent magnets; and
a cylindrical hoop configured to retain the plurality of permanent magnets to the rotor, the cylindrical hoop comprising:
a plurality of non-magnetic regions, wherein each of the plurality of non-magnetic regions is aligned with a corresponding space of the plurality of spaces; and
a plurality of magnetic regions, wherein each of the plurality of magnetic regions is aligned with a corresponding permanent magnet of the plurality of permanent magnets, tangentially alternates with each of the plurality of non-magnetic regions, and is joined to adjacent non-magnetic regions at a bond interface including a portion of each magnetic region extending into the adjacent non-magnetic region.