US 11,689,074 B2
Rotary electric machine with adhesive-reinforced rotor
Anthony M. Coppola, Rochester Hills, MI (US); Kestutis A. Sonta, Troy, MI (US); Alireza Fatemi, Canton, MI (US); Gayatri V. Dadheech, Bloomfield Hills, MI (US); Yew Sum Leong, Northville, MI (US); and Xiaosong Huang, Novi, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Oct. 29, 2020, as Appl. No. 17/84,181.
Prior Publication US 2022/0140680 A1, May 5, 2022
Int. Cl. H02K 1/28 (2006.01); B60K 1/00 (2006.01); H02K 1/27 (2022.01); H02K 1/32 (2006.01); H02K 15/03 (2006.01); H02K 21/14 (2006.01); H02K 1/276 (2022.01)
CPC H02K 1/28 (2013.01) [B60K 1/00 (2013.01); H02K 1/276 (2013.01); H02K 1/32 (2013.01); H02K 15/03 (2013.01); H02K 21/14 (2013.01); B60K 2001/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An adhesive-reinforced rotor for a rotary electric machine, comprising:
a stack of rotor lamination layers constructed of a magnetic core material, each of the rotor lamination layers having inner axial surfaces collectively defining a set of rotor openings through the magnetic core material;
one or more reinforcement blocks constructed of a non-magnetic, non-metallic, and electrically non-conductive material, wherein the one or more reinforcement blocks are disposed within a respective one of the rotor openings; and
a polymer primer/adhesive layer having a bond line thickness of less than 1 mm, wherein the polymer primer/adhesive layer is disposed between the one or more reinforcement blocks and the inner axial surfaces of the rotor lamination layers, the polymer primer/adhesive layer and the reinforcement blocks have a tensile strength of at least 50 MPa, and a modulus of elasticity of the reinforcement blocks is at least three times greater than a modulus of elasticity of the primer/adhesive layer.