US 12,009,701 B2
Electric machines having a radially embedded permanent magnet rotor and methods thereof
Emma Murphy, Columbus, OH (US); Matthew Scott, Dayton, OH (US); and Stephen English, Englewood, OH (US)
Assigned to Regal Beloit America, Inc., Beloit, WI (US)
Filed by Regal Beloit America, Inc., Beloit, WI (US)
Filed on Apr. 1, 2022, as Appl. No. 17/711,484.
Prior Publication US 2023/0318377 A1, Oct. 5, 2023
Int. Cl. H02K 1/28 (2006.01); H02K 1/276 (2022.01); H02K 15/03 (2006.01)
CPC H02K 1/28 (2013.01) [H02K 1/2773 (2013.01); H02K 15/03 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotor assembly for use in a radial flux electric motor assembly, said rotor assembly comprising:
a rotor core comprising a plurality of circumferentially spaced rotor poles;
a plurality of magnets alternately spaced with said plurality of rotor poles, wherein said plurality of rotor poles define a radial aperture between each pair of circumferentially adjacent rotor poles, and wherein each radial aperture is configured to receive a magnet of said plurality of magnets therein; and
an end cap coupled to said rotor core and to said plurality of magnets, wherein said end cap comprises a disc and a plurality of deformable members extending from said disc, wherein each deformable member of said plurality of deformable members is tapered and narrows in the direction of extension from said disc, wherein said plurality of deformable members are positioned between said rotor core and said plurality of magnets and configured to restrict movement of said plurality of magnets within said radial apertures, wherein said deformable members are configured to deform upon insertion into a cavity defined between said rotor core and said plurality of magnets.