Invention Grant
- Patent Title: Permanent magnet motor and washing machine provided therewith
- Patent Title (中): 提供永磁电动机和洗衣机
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Application No.: US12624808Application Date: 2009-11-24
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Publication No.: US08354766B2Publication Date: 2013-01-15
- Inventor: Sari Maekawa
- Applicant: Sari Maekawa
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-299427 20081125
- Main IPC: H02K21/12
- IPC: H02K21/12

Abstract:
A permanent magnet motor includes a rotor and a stator, a plurality of permanent magnets forming a plurality of magnetic poles in a core of the rotor and magnetic pole teeth located so as to correspond to phase windings of the stator. The permanent magnets include a plurality of types of permanent magnets having different coercive forces and arranged substantially into an annular shape so that one type of the permanent magnet constitutes each magnetic pole. The permanent magnets each having a relatively smaller coercive force are arranged at a first interval in the rotor, and the magnetic pole teeth corresponding to the same phase windings are arranged at a second interval differing from the first interval in the stator.
Public/Granted literature
- US20100126234A1 PERMANENT MAGNET MOTOR AND WASHING MACHINE PROVIDED THEREWITH Public/Granted day:2010-05-27
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