Invention Grant
- Patent Title: Permanent magnet rotating electric machine
- Patent Title (中): 永磁旋转电机
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Application No.: US13767492Application Date: 2013-02-14
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Publication No.: US09054568B2Publication Date: 2015-06-09
- Inventor: Daisuke Kori , Motonobu Iizuka , Atsushi Fukunaga
- Applicant: Hitachi, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Crowell & Moring LLP
- Priority: JP2012-039521 20120227
- Main IPC: H02K1/27
- IPC: H02K1/27 ; H02K7/14

Abstract:
A permanent magnet rotating electric machine includes a rotor and a stator. The rotor includes: a permanent magnet forming a single pole within a rotor core of the rotor, the permanent magnet being divided into two divided permanent magnets; a connecting portion assuming an electrical steel sheet disposed between the two divided permanent magnets; and magnet insertion holes in which the permanent magnets are inserted. In the rotor, the magnet insertion holes are shaped to include: air gaps at both end portions in a width direction of the permanent magnet, each air gap being formed between a surface of the permanent magnet extending perpendicularly to the magnetization direction and a surface of the electrical steel sheet facing the surface of the permanent magnet; a shoulder portion disposed on the facing surface; and another air gap extending toward a rotor outside diameter side and the magnetic pole center side.
Public/Granted literature
- US20130221784A1 Permanent Magnet Rotating Electric Machine Public/Granted day:2013-08-29
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