US 12,334,779 B2
Rotor, electric motor, and rotor production method
Yuji Sasaki, Tokyo (JP); Naoki Oiwa, Tokyo (JP); Natsuki Yoneyama, Tokyo (JP); and Yohei Sakakibara, Tokyo (JP)
Filed by IHI Corporation, Tokyo (JP)
Filed on Dec. 21, 2022, as Appl. No. 18/069,231.
Application 18/069,231 is a continuation of application No. PCT/JP2021/026862, filed on Jul. 16, 2021.
Claims priority of application No. 2020-133110 (JP), filed on Aug. 5, 2020.
Prior Publication US 2023/0118484 A1, Apr. 20, 2023
Int. Cl. H02K 1/27 (2022.01); H02K 1/278 (2022.01); H02K 1/28 (2006.01); H02K 15/03 (2006.01); H02K 15/12 (2006.01); H02K 21/14 (2006.01)
CPC H02K 1/28 (2013.01) [H02K 1/278 (2013.01); H02K 15/03 (2013.01); H02K 15/12 (2013.01); H02K 21/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor comprising:
a cylindrical magnet structure extending in an axial direction to cover a shaft, wherein the magnet structure has an outer circumferential surface including a first circumferential surface having a first diameter that is constant along the axial direction, a first tapered surface gradually decreasing in diameter from the first circumferential surface toward a first end surface of the magnet structure, a second circumferential surface having a second diameter that is constant along the axial direction, and a second tapered surface gradually decreasing in diameter from the second circumferential surface toward a second end surface opposite the first end surface in the axial direction, wherein the first diameter of the first circumferential surface from which the first tapered surface extends, is greater than the second diameter of the second circumferential surface from which the second tapered surface extends; and
a protective tube including a fiber body covering the outer circumferential surface of the magnet structure, wherein the protective tube includes a first end portion that is bonded to the first tapered surface of the magnet structure, and a second end portion that is bonded to the second tapered surface of the magnet structure.