Invention Grant
- Patent Title: Permanent magnet, motor, and generator
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Application No.: US14636268Application Date: 2015-03-03
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Publication No.: US10650947B2Publication Date: 2020-05-12
- Inventor: Yosuke Horiuchi , Shinya Sakurada , Keiko Okamoto , Masaya Hagiwara , Tsuyoshi Kobayashi , Masaki Endo , Tadahiko Kobayashi , Naoyuki Sanada
- Applicant: KABUSHIKI KAISHA TOSHIBA
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Tokyo
- Agency: Amin, Turocy & Watson, LLP
- Main IPC: H01F1/055
- IPC: H01F1/055 ; H02K1/02 ; H01F1/053 ; C22C1/04 ; C22F1/10 ; H02K1/27 ; C22C19/07 ; C22C30/02 ; H01F1/059 ; B22F9/04 ; B22F9/08

Abstract:
The invention provides a high-performance permanent magnet. The permanent magnet has a composition that is expressed by a composition formula RpFeqMrCutCo100-p-q-r-t, where R is at least one element selected from a rare earth element, M is at least one element selected from the group consisting of Zr, Ti, and Hf, p is a number satisfying 10.8≤p≤12.5 atomic percent, q is a number satisfying 25≤q≤40 atomic percent, r is a number satisfying 0.88≤r≤4.5 atomic percent, and t is a number satisfying 3.5≤t≤13.5 atomic percent. The permanent magnet also has a metallic structure that includes a main phase having a Th2Zn17 crystal phase, and a Cu-M rich phase having a higher Cu concentration and a higher M concentration than the main phase.
Public/Granted literature
- US20150270039A1 PERMANENT MAGNET, MOTOR, AND GENERATOR Public/Granted day:2015-09-24
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