Rare-earth magnet and linear motor using same
US-2018114620-A1 · Apr 26, 2018 · US
Linear motor
US2023421036A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023421036-A1 |
| Application number | US-202318368072-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 14, 2023 |
| Priority date | Mar 19, 2021 |
| Publication date | Dec 28, 2023 |
| Grant date | — |
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- Title
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Abstract
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Disclosed is a linear motor which includes a stator and a mover. The stator extends along a first axis. The mover is arranged so as to extend along the first axis and radially face the stator. The mover has a pole interval along the first axis different from that of the stator. At least one of the stator and the mover has a plurality of permanent magnets arranged in alignment with each other along the first axis, and a plurality of yoke parts arranged in alignment with each other along the first axis. The permanent magnets are provided, for each pole, in a continuous range along the first axis. The permanent magnets are polar anisotropic magnets that are magnetized from both end portions along the first axis to a radial end portion at a center along the first axis, or magnetized in the reverse directions to these.
First claim
Opening claim text (preview).
What is claimed is: 1 . A linear motor comprising: a stator extending along a first axis; and a mover arranged so as to extend along the first axis and radially face the stator, the mover having a pole interval along the first axis different from that of the stator, wherein: at least one of the stator and the mover has a plurality of permanent magnets arranged in alignment with each other along the first axis, and a plurality of yoke parts arranged in alignment with each other along the first axis; the permanent magnets are provided, for each pole, in a continuous range along the first axis; and the permanent magnets are polar anisotropic magnets that are magnetized from both end portions along the first axis to a radial end portion at a center along the first axis, or magnetized in the reverse directions to these. 2 . The linear motor as set forth in claim 1 , wherein: for each pole, there is provided only one of the permanent magnets. 3 . The linear motor as set forth in claim 1 , wherein: the permanent magnets, which are the polar anisotropic magnets, are provided in both the stator and the mover. 4 . The linear motor as set forth in claim 1 , wherein: the mover has a shaft part extending along the first axis; and the shaft part and the yoke parts are integrally formed into a single-piece part. 5 . The linear motor as set forth in claim 4 , wherein: the permanent magnets, which are the polar anisotropic magnets arranged between the yoke parts, are formed as bonded magnets. 6 . The linear motor as set forth in claim 1 , wherein: the mover has a shaft part extending along the first axis; and the shaft part and the yoke parts are formed as separate parts from each other.
Assignees
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Classifications
- H02K41/031Primary
of the permanent magnet type · CPC title
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- What does patent US2023421036A1 cover?
- Disclosed is a linear motor which includes a stator and a mover. The stator extends along a first axis. The mover is arranged so as to extend along the first axis and radially face the stator. The mover has a pole interval along the first axis different from that of the stator. At least one of the stator and the mover has a plurality of permanent magnets arranged in alignment with each other al…
- Who is the assignee on this patent?
- Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification H02K41/031. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 28 2023 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).