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公开(公告)号：US10903700B2
公开(公告)日：2021-01-26
申请号：US16311771
申请日：2017-04-06
发明人： Naoto Igarashi , Shinichi Hirono , Tomoyuki Ueno , Asako Watanabe
摘要： A dust core included in an axial-gap rotary electric machine. The dust core includes a sector-shaped plate-like yoke portion, and a tooth portion integrated with the yoke portion and projecting from the yoke portion. Denoting one of surfaces of the yoke portion from which the tooth portion projects as a toothed surface, the toothed surface has a concave portion provided between a peripheral edge of the tooth portion and a peripheral edge of the yoke portion.
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32.发明授权公开(公告)号：US10196716B2
公开(公告)日：2019-02-05
申请号：US15741916
申请日：2017-02-02
发明人： Tomoyuki Ueno , Koji Yamada , Kazuya Takizawa , Yuki Adachi , Tetsuya Hayashi
IPC分类号： B22F1/02 , C22C1/00 , C22C33/02 , B22F1/00 , C03C8/02 , B24D18/00 , C22C38/04 , C03C3/091 , C22C32/00 , C22C38/00 , B22F9/04
摘要： An iron-based powder for powder metallurgy includes an iron-based powder and a composite oxide powder, and the composite oxide contains, by mass, from 15% to 30% Si, from 9% to 18% Al, from 3% to 6% B, from 0.5% to 3% Mg, from 2% to 6% Ca, from 0.01% to 1% Sr, and from 45% to 55% O.
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公开(公告)号：US20180200787A1
公开(公告)日：2018-07-19
申请号：US15743507
申请日：2016-07-15
发明人： Tatsuya Saito , Tomoyuki Ueno , Asako Watanabe , Hijiri Tsuruta
CPC分类号： B22F1/0007 , B22F1/00 , B22F1/02 , B22F3/00 , B22F3/02 , B22F3/24 , B22F2003/248 , B22F2301/35 , H01F1/24 , H01F3/08 , H01F27/255 , H01F41/02 , H01F41/0246
摘要： A dust core includes: a plurality of soft magnetic particles composed of an iron-based material; an insulating layer including a coating layer that is composed mainly of a phosphate and covers the surface of the soft magnetic particles; and insulating pieces containing a constituent material of the insulating layer, each of the insulating pieces being surrounded by at least three mutually adjacent ones of the soft magnetic particles while separated from the insulating layer.
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公开(公告)号：US11894720B2
公开(公告)日：2024-02-06
申请号：US17286943
申请日：2019-12-11
发明人： Tatsuya Saito , Yuichi Nakamura , Tomoyuki Ueno
摘要： A core used in an axial gap type rotating electrical machine includes an annular yoke having a plurality of through-holes disposed in a circumferential direction, and a plurality of columnar teeth disposed in the circumferential direction of the yoke, each of the plurality of columnar teeth including one end inserted into each of the plurality of through-holes. The yoke and each of the teeth are composed of a powder compact separate from each other, and the one end of each of the teeth is off-center in the through-hole.
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