Invention Grant
- Patent Title: Permanent magnet, motor, and generator
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Application No.: US14661122Application Date: 2015-03-18
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Publication No.: US10770208B2Publication Date: 2020-09-08
- 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 ; C22C1/04 ; C22C19/07 ; C22C30/02 ; H02K1/02 ; B22F9/08 ; B22F9/04 ; H01F7/02

Abstract:
A high performance permanent magnet is provided. The permanent magnet includes a composition represented by a composition formula: RpFeqMrCutCo100-p-q-r-t, and a metallic structure including cell phases having a Th2Zn17 crystal phase and Cu-rich phases having higher Cu concentration than the cell phases. An average diameter of the cell phases is 220 nm or less, and in a numeric value range from a minimum diameter to a maximum diameter of the cell phases, a ratio of a number of cell phases having a diameter in a numeric value range of less than upper 20% from the maximum diameter is 20% or less of all the cell phases.
Public/Granted literature
- US20150270040A1 PERMANENT MAGNET, MOTOR, AND GENERATOR Public/Granted day:2015-09-24
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