US 11,955,845 B2
Axial flux electrical machine rotor with magnet retention device
Michael R. Ricci, Camarillo, CA (US); David B. Paden, Goleta, CA (US); Brian J. Clark, Santa Barbara, CA (US); Claire Cappe, Santa Barbara, CA (US); Zachary J. Marshall, Ventura, CA (US); and Bradley E. Paden, Goleta, CA (US)
Assigned to LaunchPoint Electric Propulsion Solutions Inc., Goleta, CA (US)
Filed by LaunchPoint Electric Propulsion Solutions, Inc., Goleta, CA (US)
Filed on Oct. 7, 2021, as Appl. No. 17/496,098.
Claims priority of provisional application 63/090,224, filed on Oct. 10, 2020.
Prior Publication US 2022/0115925 A1, Apr. 14, 2022
Int. Cl. H02K 21/24 (2006.01); H02K 1/2793 (2022.01); H02K 1/28 (2006.01)
CPC H02K 1/28 (2013.01) [H02K 1/2793 (2013.01); H02K 21/24 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An axial flux motor comprising:
a rotor having radial side walls with circumferential OD walls and circumferential ID walls forming a plurality of pockets, each pocket in the plurality of pockets receiving one of a plurality of magnet assemblies with each magnet assembly of the plurality of magnet assemblies adhered to an active surface wall in an associated one of the plurality of pockets with epoxy as a principal load path;
wherein a retention device providing an alternate load path comprises a poured epoxy layer on an inactive surface of the each magnet assembly that forms a meniscus with respect to the pocket side walls, OD wall and ID wall prior to hardening.