US 12,424,912 B2
Motor rotor with end ring
Kai Iijima, Tokyo (JP); Naoki Oiwa, Tokyo (JP); Natsuki Yoneyama, Tokyo (JP); Yuji Sasaki, Tokyo (JP); Yoshihito Katsu, Tokyo (JP); and Hikaru Sugiura, Tokyo (JP)
Filed by IHI Corporation, Tokyo (JP)
Filed on Feb. 15, 2023, as Appl. No. 18/169,210.
Application 18/169,210 is a continuation of application No. PCT/JP2021/033514, filed on Sep. 13, 2021.
Claims priority of application No. 2020-165146 (JP), filed on Sep. 30, 2020.
Prior Publication US 2023/0198355 A1, Jun. 22, 2023
Int. Cl. H02K 1/27 (2022.01); H02K 1/28 (2006.01); H02K 15/03 (2006.01); H02K 15/12 (2006.01)
CPC H02K 15/03 (2013.01) [H02K 1/27 (2013.01); H02K 1/28 (2013.01); H02K 15/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A motor rotor comprising:
a shaft body;
a cylindrical magnet covering an outer circumferential surface of the shaft body;
a protective layer covering an outer cylindrical surface of the magnet, wherein the protective layer includes an end surface in an axial direction of the shaft body;
an annular end ring in contact with an end surface of the magnet in the axial direction, wherein the shaft body is inserted through the end ring;
an inner resin layer formed between an inner circumferential surface of the end ring and the outer circumferential surface of the shaft body; and
an outer resin layer partially located between an outer circumferential surface of the end ring and an inner circumferential surface of the protective layer,
wherein a first portion of the outer resin layer located outside of the protective layer in the axial direction that extends in a radial direction of the shaft body along the end surface of the protective layer.