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公开(公告)号：US20220337108A1
公开(公告)日：2022-10-20
申请号：US17659117
申请日：2022-04-13
发明人： Reimi SAKAGUCHI , Daisuke ICHIGOZAKI , Masaaki ITO
摘要： Provided is a motor capable of increasing a torque while suppressing an increase in the physical size of the motor. A motor includes a rotor. The rotor includes pairs of magnet slots evenly spaced in a circumferential direction, each pair of magnet slots being arranged in a V-shape, pairs of main magnets housed in the pairs of magnet slots, and a plurality of auxiliary magnets including an outer magnet housed in an outer end in the circumferential direction in each of the pairs of magnet slots. The motor satisfies at least one of a first condition that the main magnets are sintered magnets and the auxiliary magnets are bonded magnets, or a second condition that magnetization directions of the main magnet and the outer magnet housed in the same magnet slot intersect outside in the radial direction so as to define an acute angle.
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公开(公告)号：US20220139601A1
公开(公告)日：2022-05-05
申请号：US17509112
申请日：2021-10-25
发明人： Noritsugu SAKUMA , Tetsuya SHOJI , Akihito KINOSHITA , Katsunori DANNO , Daisuke ICHIGOZAKI , Masaaki ITO , Reimi SAKAGUCHI
摘要： The present disclosure provides a rare earth magnet having a main phase and a grain boundary phase and a manufacturing method therefor. In the rare earth magnet of the present disclosure, the overall composition is represented by a formula (R1(1-x-y)LaxCey)u(Fe(1-z)Coz)(100-u-w-v)BwM1v. (R1 is a predetermined rare earth element, M1 is a predetermined element, and the followings are satisfied, 0.05≤x≤0.25, 0.5≤y/(x+y)≤0.50, 13.5≤u≤20.0, 0≤z≤0.100, 5.0≤w≤10.0, and 0≤v≤2.00). The main phase has an R2Fe14B-type crystal structure, and the average grain size and the volume fraction of the main phase are respectively 1.0 μm to 20.0 μm and 80.0% to 90.0%. The main phase and the grain boundary phase satisfy, (the existence proportion of La in the grain boundary phase)/(the existence proportion of La in the main phase)>1.30.
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