Invention Grant
- Patent Title: Core, stator, and rotating electric machine
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Application No.: US17414871Application Date: 2019-12-13
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Publication No.: US11791672B2Publication Date: 2023-10-17
- Inventor: Tatsuya Saito , Tomoyuki Ueno , Yuka Fukunaga , Hijiri Tsuruta , Shinichi Hirono
- Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD. , Sumitomo Electric Sintered Alloy, Ltd.
- Applicant Address: JP Osaka
- Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.,Sumitomo Electric Sintered Alloy, Ltd.
- Current Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.,Sumitomo Electric Sintered Alloy, Ltd.
- Current Assignee Address: JP Osaka; JP Takahashi
- Agency: Faegre Drinker Biddle & Reath LLP
- Priority: JP 18236767 2018.12.18
- International Application: PCT/JP2019/049064 2019.12.13
- International Announcement: WO2020/129866A 2020.06.25
- Date entered country: 2021-06-16
- Main IPC: H02K1/14
- IPC: H02K1/14

Abstract:
A core for use in an axial gap rotating electric machine, the core including: a yoke having an annular plate shape; and a plurality of teeth having a columnar shape arranged at intervals in a circumferential direction of the yoke, wherein the yoke has: an outer-circumferential face; an inner-circumferential face; a first face having a flat shape connecting the outer-circumferential face and the inner-circumferential face to each other; and a plurality of recessed portions connected to the first face, each of the plurality of teeth has an outer-circumferential face protruding in an axial direction of the yoke with respect to the first face, each of the plurality of recessed portions are connected to at least a portion of each one of the plurality of teeth in a circumferential direction of the outer-circumferential face, all shortest distances between at least one of an outer-circumferential edge of the first face and an inner-circumferential edge of the first face and the outer-circumferential faces of the plurality of teeth are 4 mm or less, and the yoke and the plurality of teeth are made of an integrally-molded powder compact.
Public/Granted literature
- US20220060066A1 CORE, STATOR, AND ROTATING ELECTRIC MACHINE Public/Granted day:2022-02-24
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