Invention Grant
- Patent Title: Permanent magnet type rotary machine
- Patent Title (中): 永磁式旋转机
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Application No.: US11642680Application Date: 2006-12-21
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Publication No.: US07898123B2Publication Date: 2011-03-01
- Inventor: Hiroaki Usui
- Applicant: Hiroaki Usui
- Applicant Address: JP Ueda-Shi
- Assignee: Shinano Kenshi Kabushiki Kaisha
- Current Assignee: Shinano Kenshi Kabushiki Kaisha
- Current Assignee Address: JP Ueda-Shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2005-370511 20051222
- Main IPC: H02K37/00
- IPC: H02K37/00 ; H02K37/12 ; H02K37/14

Abstract:
The permanent magnet type rotary machine is capable of reducing cogging torque caused by variation of amounts of magnetic flux in magnetic circuits. The permanent magnet type rotary machine comprises: a stator constituted by stator units, which are coaxially stacked and in each of which a coil is sandwiched between stator yokes; and a rotor including a permanent magnet having magnetic poles, which respectively face magnetic pole teeth of the stator yokes, the rotor being rotatably supported by an output shaft. The stator units in one phase is divided into n (n is an integer one or more), and magnetic centers of at least one pair of the magnetic pole teeth of the adjacent stator yokes, which are vertically arranged, are shifted with a prescribed phase difference so as to mutually cancel their cogging torque.
Public/Granted literature
- US20070145834A1 Permanent magnet type rotary machine Public/Granted day:2007-06-28
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