Invention Grant
- Patent Title: Core, stator, and rotary electric machine
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Application No.: US17278333Application Date: 2019-09-05
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Publication No.: US11888351B2Publication Date: 2024-01-30
- Inventor: Tatsuya Saito , Yuichi Nakamura , Tomoyuki Ueno
- 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: XSENSUS LLP
- Priority: JP 18212322 2018.11.12
- International Application: PCT/JP2019/035081 2019.09.05
- International Announcement: WO2020/100385A 2020.05.22
- Date entered country: 2021-03-22
- Main IPC: H02K1/14
- IPC: H02K1/14 ; H02K1/18

Abstract:
A core that is used in an axial-gap rotary electric machine and that includes a body, and frame-shaped flange portions. The body includes an annular yoke and columnar teeth that are arranged in a circumferential direction of the yoke. The flange portions are fixed to end portions of the respective teeth. The yoke and the teeth are composed of a single powder compact. Each of the flange portions is composed of a powder compact that has a through-hole. The end portion of each of the teeth is inserted in the through-hole, and an end surface of each of the teeth is exposed from the through-hole. A ratio of an area of the end surface of each of the teeth to an area within an outer circumferential edge of each of the flange portions is 7.5% or more in a plan view in an axial direction of the yoke.
Public/Granted literature
- US20210351639A1 CORE, STATOR, AND ROTARY ELECTRIC MACHINE Public/Granted day:2021-11-11
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