US 12,348,086 B2
Magnet arrangement method and rotor manufacturing method
Kazuhiro Sato, Toyota (JP); and Kei Ohta, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 18/548,257
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
PCT Filed Jan. 28, 2022, PCT No. PCT/JP2022/003361
§ 371(c)(1), (2) Date Aug. 29, 2023,
PCT Pub. No. WO2022/196128, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 2021-044585 (JP), filed on Mar. 18, 2021.
Prior Publication US 2024/0120788 A1, Apr. 11, 2024
Int. Cl. H02K 1/2783 (2022.01); H02K 15/03 (2025.01)
CPC H02K 1/2783 (2022.01) [H02K 15/03 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A magnet arrangement method for arranging a plurality of magnetized magnets in a Halbach array, the magnet arrangement method comprising:
a process of forming a first magnet group by combining magnets in such a way that a direction of a magnetic force that acts on the magnets is oriented in a first direction;
a process of forming a second magnet group by combining magnets in such a way that the direction of a magnetic force that acts on the magnets is oriented in a second direction which is opposite to the first direction; and
a process of assembling a plurality of the first magnet groups and a plurality of the second magnet groups,
wherein a third magnet group is formed by combining at least one of the first magnet group with at least one of the second magnet group, a plurality of the third magnet groups are arranged with gaps therebetween, and then each of the plurality of first magnet groups is arranged between the plurality of third magnet groups, thereby forming a Halbach array having an annular shape.