Title:
回転電機用永久磁石、回転電機用永久磁石の製造方法、回転電機及び回転電機の製造方法
Document Type and Number:
Japanese Patent JP6638051
Kind Code:
B2
Abstract:
To provide: a permanent magnet for a rotary electric machine, which can keep a necessary and sufficient surface magnetic flux density even in the event of occurrence of demagnetization, and which enables the prevention of the reduction in rotary electric machine's torque and power generation quantity; a method for manufacturing such a permanent magnet of a rotary electric machine; a rotary electric machine incorporating such a permanent magnet for a rotary electric machine; and a method for manufacturing the rotary electric machine.SOLUTION: A permanent magnet 1 for a rotary electric machine is manufactured by the steps of: pulverizing a magnet raw material into magnet powder; mixing the magnet powder with a binder, thereby producing a compound 17; then, molding the compound 17 thus produced in a sheet form, thereby preparing a green sheet 19; thereafter applying a magnetic field to the green sheet 19 thus molded, thereby performing magnetic field orientation of the green sheet 19; shaping, by deformation, the green sheet 19 thus oriented in a product form; and then, baking the product form. In the permanent magnet 1, axes of easy magnetization are oriented so that they converge into an area easier for demagnetization in comparison to other areas.SELECTED DRAWING: Figure 3
Inventors:
Makoto Fujiwara
Kume Katsuya
Toshinobu Hoshino
Miho Yamaguchi
Morimoto Masakazu
Toshiaki Okuno
Eiichi Imoto
Hiroshi Ebe
Tomohiro Omure
Ozeki Idemitsu
Kenichi Fujikawa
Yuki Kato
Takashi Yamamoto
Shoichiro Saito
Kume Katsuya
Toshinobu Hoshino
Miho Yamaguchi
Morimoto Masakazu
Toshiaki Okuno
Eiichi Imoto
Hiroshi Ebe
Tomohiro Omure
Ozeki Idemitsu
Kenichi Fujikawa
Yuki Kato
Takashi Yamamoto
Shoichiro Saito
Application Number:
JP2018209635A
Publication Date:
January 29, 2020
Filing Date:
November 07, 2018
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
H02K1/27; H01F1/057; H01F7/02; H01F41/02; H02K15/03
Domestic Patent References:
| JP2013243886A | ||||
| JP2009142144A | ||||
| JP2009254143A |
Foreign References:
| WO2013069076A1 |
Attorney, Agent or Firm:
Patent business corporation NEXT