Electric machines using axially-magnetized curvilinear permanent magnets
US-2024429761-A1 · Dec 26, 2024 · US
Manufacturing Method for Magnet and Magnet
US2017011847A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017011847-A1 |
| Application number | US-201615200938-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 1, 2016 |
| Priority date | Jul 8, 2015 |
| Publication date | Jan 12, 2017 |
| Grant date | — |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A manufacturing method for a magnet is provided which includes molding, under pressure, magnetic powder in a form of secondary particles resulting from aggregation of primary particles, to obtain a molding. A ratio of an average particle size of the primary particles to a maximum particle size of the secondary particles is 1:150 to 1:200. The magnet in the invention is manufactured by the manufacturing method for a magnet in the invention. The invention allows manufacture of the molding and the magnet in both of which the magnetic powder is densely compressed. The magnet has a high residual magnetic flux density.
First claim
Opening claim text (preview).
What is claimed is: 1 . A manufacturing method for a magnet, comprising: molding, under pressure, magnetic powder in a form of secondary particles resulting from aggregation of primary particles, to obtain a molding, wherein the magnetic powder is configured such that a ratio of an average particle size of the primary particles to a maximum particle size of the secondary particles is 1:150 to 1:200. 2 . The manufacturing method for a magnet according to claim 1 , wherein the magnetic powder is obtained by pressurizing magnetic powder having a larger particle size than the primary particles at a pressure equal to or higher than a burst pressure to destroy the magnetic powder and to form the secondary particles. 3 . The manufacturing method for a magnet according to claim 1 , wherein a maximum particle size of the secondary particles is controlled by classification. 4 . The manufacturing method for a magnet according to claim 2 , wherein a maximum particle size of the secondary particles is controlled by classification. 5 . A magnet manufactured by the manufacturing method for a magnet according to claim 1 .
Assignees
Inventors
Classifications
containing inorganic lubricating or binding agents, e.g. metal salts · CPC title
characterised by a mixture of particles of different sizes or by the particle size distribution · CPC title
containing rare earths, i.e. Sc, Y, Lanthanides · CPC title
Imparting anisotropy (methods and devices for magnetising permanent magnets H01F13/003) · CPC title
- H01F41/0266Primary
Moulding; Pressing (H01F41/0273 takes precedence; hard magnetic particles H01F1/06, H01F1/11) · CPC title
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- What does patent US2017011847A1 cover?
- A manufacturing method for a magnet is provided which includes molding, under pressure, magnetic powder in a form of secondary particles resulting from aggregation of primary particles, to obtain a molding. A ratio of an average particle size of the primary particles to a maximum particle size of the secondary particles is 1:150 to 1:200. The magnet in the invention is manufactured by the manuf…
- Who is the assignee on this patent?
- Jtekt Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F41/0266. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jan 12 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).