Invention Grant
- Patent Title: Rare earth magnet, rotor and manufacturing method for rare earth magnet
- Patent Title (中): 稀土磁铁，转子及稀土磁铁制造方法
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Application No.: US14282473Application Date: 2014-05-20
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Publication No.: US09443653B2Publication Date: 2016-09-13
- Inventor: Yoshifumi Furuta , Yasushi Mizusaki , Katsuyoshi Furuya
- Applicant: NIDEC SANKYO CORPORATION
- Applicant Address: JP Nagano
- Assignee: NIDEC SANKYO CORPORATION
- Current Assignee: NIDEC SANKYO CORPORATION
- Current Assignee Address: JP Nagano
- Agency: Cantor Colburn LLP
- Priority: JP2013-112250 20130528
- Main IPC: H01F41/02
- IPC: H01F41/02 ; H01F41/00 ; H01F7/02 ; H02K1/27 ; H02K1/02 ; H02K1/04
Abstract:
A rare earth magnet may include a formed body having magnetic powder containing rare earth metal, the formed body being magnetized, a coating film which is formed on an outer face of the formed body, and a rust preventive treatment layer which is formed on a surface of the magnetic powder in a pore of the formed body. In a manufacturing method for a rare earth magnet, a forming step is performed in which a formed body having magnetic powder containing rare earth metal is formed, after that, a coating film forming step is performed in which a coating film is formed on an outer face of the formed body and, after that, a rust prevention processing step is performed in which rust preventive liquid is impregnated into the formed body.
Public/Granted literature
- US20140354100A1 RARE EARTH MAGNET, ROTOR AND MANUFACTURING METHOD FOR RARE EARTH MAGNET Public/Granted day:2014-12-04
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