永久磁石回転子の製造方法

Japanese Patent JP7271402

B2

To provide a manufacturing method of a permanent magnet rotor capable of being magnetized (preferably completely magnetized) in a shorter time and with lower energy.SOLUTION: A manufacturing method of a permanent magnet rotor includes a step A of obtaining a relationship X between the temperature at which complete magnetization can be obtained and the effective magnetic field for a permanent magnet before magnetization in advance before arranging the magnet on the outer peripheral side of a rotating shaft in an iron core, a step B of heating the permanent magnet rotor in which the permanent magnet before magnetization is arranged on the outer peripheral side of the rotating shaft in the iron core at a heating temperature T1 to obtain the temperature distribution α of the permanent magnet before magnetization, a step C of obtaining the minimum magnetic field Hmin for completely magnetizing the entire permanent magnet before magnetization from the relationship X and the temperature distribution α, and a step D of obtaining the magnetic field H1 generated by a magnetizing yoke to magnetize the entire permanent magnet before magnetization with the minimum magnetic field Hmin or more, and heating the permanent magnet before magnetization at the heating temperature T1, and then performing magnetization by the magnetic field H1 to obtain a rotor after magnetization.SELECTED DRAWING: Figure 1

Junpei Hinata
Tetsuhiko Mizoguchi
Nariyasu Saito
Kazunari Hanada
Naoya Tomita
Mitsutaka Hori

JP2019211531A

May 11, 2023

November 22, 2019

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Daido Steel Co., Ltd.
Nippon Electromagnetic Instruments Co., Ltd.

H02K15/03; H01F13/00; H01F41/02

JP2003274618A
JP2011078268A
JP2006295122A
JP2014099600A
JP2015012038A
JP6315252A
JP2016063555A
JP2014150638A
JP201487075A

Shunsuke Migita
Takahashi Politics

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