Electric machines using axially-magnetized curvilinear permanent magnets
US-2024429761-A1 · Dec 26, 2024 · US
Permanent magnet, and motor and power generator using the same
US9299486B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9299486-B2 |
| Application number | US-201313799335-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 13, 2013 |
| Priority date | Mar 30, 2012 |
| Publication date | Mar 29, 2016 |
| Grant date | Mar 29, 2016 |
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Abstract
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In one embodiment, a permanent magnet includes a magnet main body and a surface portion provided on a surface of the magnet main body. The magnet main body has a composition expressed by a composition formula 1: R(Fe p1 M q1 Cu r1 Co 1-p1-q1-r1 ) z1 . The surface portion has a composition expressed by a composition formula 2: R(Fe p2 M q2 Cu r2 Co 1-p2-q2-r2 ) z2 . In the composition formulas 1 and 2, R is at least one element selected from rare earth elements, M is at least one element selected from Ti, Zr and Hf, p1 and p2 are 0.25 to 0.45, q1 and q2 are 0.01 to 0.05, r1 and r2 are 0.01 to 0.1, z1 is 6 to 9, and z2 satisfies 0.8≦z2/z1≦0.995.
First claim
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What is claimed is: 1. A permanent magnet, comprising: a magnet main body having a composition expressed by a composition formula 1: R(Fe p1 M q1 Cu r1 Co 1-p1-q1-r1 ) z1 where, R is at least one element selected from rare-earth elements, M is at least one element selected from Ti, Zr, and Hf, p1 is a number satisfying 0.25≦p1≦0.45 (atomic ratio), q1 is a number satisfying 0.01≦q1≦0.05 (atomic ratio), r1 is a number satisfying 0.01≦r1…
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- What does patent US9299486B2 cover?
- In one embodiment, a permanent magnet includes a magnet main body and a surface portion provided on a surface of the magnet main body. The magnet main body has a composition expressed by a composition formula 1: R(Fe p1 M q1 Cu r1 Co 1-p1-q1-r1 ) z1 . The surface portion has a composition expressed by a composition formula 2: R(Fe p2 M q2 Cu r2 Co 1-p2-q2-r2 ) z2 . In the composition formulas 1…
- Who is the assignee on this patent?
- Toshiba Kk
- What technology area does this patent fall under?
- Primary CPC classification H02K1/02. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).