Invention Grant
- Patent Title: Permanent magnet type electric rotary machine and compressor using the same
- Patent Title (中): 永磁式电动旋转机及其使用的压缩机
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Application No.: US11780157Application Date: 2007-07-19
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Publication No.: US07768172B2Publication Date: 2010-08-03
- Inventor: Ryoichi Takahata , Satoshi Kikuchi , Shinichi Wakui , Keiji Noma , Masaharu Senoo
- Applicant: Ryoichi Takahata , Satoshi Kikuchi , Shinichi Wakui , Keiji Noma , Masaharu Senoo
- Applicant Address: JP Tokyo
- Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2006-197562 20060720
- Main IPC: H02K21/12
- IPC: H02K21/12

Abstract:
A permanent magnet type electric rotary machine includes a stator including a stator core having teeth and slots, and a rotor provided with permanent magnets as magnet poles in a rotor core. A pole core portion which between each of the permanent magnets and an outer surface of the rotor core is provided with a plurality of pole slits. A region of the pole core portion is defined by concave portions provided on q-axes to be interpolars on both sides of the pole core portion, and thereby configured that a gap between the outer surface on the q-axis of the rotor core and an inner surface of the stator core is larger than a gap between the outer surface on the d-axis of the pole core portion and the inner surface of the stator, so that magnetic fluxes from the permanent magnet pass through the pole core portion concentrately.
Public/Granted literature
- US20080018190A1 PERMANENT MAGNET TYPE ELECTRIC ROTARY MACHINE AND COMPRESSOR USING THE SAME Public/Granted day:2008-01-24
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