US 12,456,892 B2
Electric motor having high strength rotor with ring magnet
Bruce Ley, Ossian, IN (US); Michael Coles, Manlius, NY (US); Hunter Gill, Uniontown, OH (US); Mike Alivero, Syracuse, NY (US); Joe Engle, Uniontown, OH (US); Kyle Chesnut, Fort Wayne, IN (US); Tillian Jones, Syracuse, NY (US); and Jeremy Beck, Fort Wayne, IN (US)
Assigned to Nidec Motor Corporation, St. Louis, MO (US)
Filed by Nidec Motor Corporation, St. Louis, MO (US)
Filed on Oct. 18, 2023, as Appl. No. 18/489,644.
Claims priority of provisional application 63/380,193, filed on Oct. 19, 2022.
Prior Publication US 2024/0136875 A1, Apr. 25, 2024
Prior Publication US 2024/0235297 A9, Jul. 11, 2024
Int. Cl. H02K 1/2793 (2022.01); H02K 1/18 (2006.01); H02K 1/28 (2006.01); H02K 7/00 (2006.01)
CPC H02K 1/2793 (2013.01) [H02K 1/182 (2013.01); H02K 1/28 (2013.01); H02K 7/003 (2013.01); H02K 2201/03 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electric motor comprising:
a stator;
a rotor rotatable relative to the stator,
said rotor including an axial shaft, a disc projecting radially from the shaft, and a ring magnet affixed to the disc,
said shaft and said disc being integrally formed as a unitary body,
said ring magnet presenting a radially outer magnet perimeter,
said disc presenting a radially outer disc perimeter; and
a retaining ring engaging the ring magnet and disc perimeters to affix the ring magnet to the disc,
said retaining ring including a pair of axially spaced radially inward extending lips, a first one of which engages the ring magnet and a second one of which engages the disc.