US 11,916,438 B2
Magnetization ring, magnetization method, magnetization apparatus, rotor, motor, compressor, and air conditioner
Takanori Watanabe, Tokyo (JP); Atsushi Matsuoka, Tokyo (JP); and Atsushi Ishikawa, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/607,691
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jun. 4, 2019, PCT No. PCT/JP2019/022142
§ 371(c)(1), (2) Date Oct. 29, 2021,
PCT Pub. No. WO2020/245903, PCT Pub. Date Dec. 10, 2020.
Prior Publication US 2022/0216752 A1, Jul. 7, 2022
Int. Cl. H02K 1/276 (2022.01); H02K 15/03 (2006.01); H02K 21/14 (2006.01)
CPC H02K 1/2766 (2013.01) [H02K 15/03 (2013.01); H02K 21/14 (2013.01)] 38 Claims
OG exemplary drawing
 
29. A magnetization apparatus to magnetize a permanent magnet of a rotor having the permanent magnet and an inter-pole portion which are arranged in a circumferential direction about an axis,
the magnetization apparatus comprising:
a magnetization yoke on which a coil is wound, the magnetization yoke surrounding the rotor;
a magnetization ring disposed between the magnetization yoke and the rotor; and
a power source to apply current to the coil,
wherein the magnetization ring comprises a magnetic portion facing a center of the permanent magnet in the circumferential direction, a nonmagnetic portion facing the inter-pole portion, and a nonmagnetic annular portion provided on at least one side of the magnetic portion and the nonmagnetic portion in a direction of the axis.