Methods for tailoring the magnetic permeability of soft magnets, and soft magnets obtained therefrom
US-2024308002-A1 · Sep 19, 2024 · US
Method of manufacturing permanent magnet of rotor for axial flux electric machine yielding permanent magnet with low loss and low cost
US11830668B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11830668-B2 |
| Application number | US-202217724618-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 20, 2022 |
| Priority date | Feb 28, 2022 |
| Publication date | Nov 28, 2023 |
| Grant date | Nov 28, 2023 |
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Abstract
Official abstract text for this publication.
A method of manufacturing a permanent magnet for a rotor of an axial flux electric machine is described herein. The method includes forming multiple permanent magnet (PM) pieces to have the same shape. Each of the PM pieces has an inner radial surface, an outer radial surface, and a pair of side surfaces extending between the inner and outer radial surfaces. The method further includes attaching at least one of the side surfaces of each of the PM pieces to one of the side surfaces of another one of the PM pieces to form partitions configured to extend in a radial direction of the rotor.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of manufacturing a permanent magnet for a rotor of an axial flux electric machine, the method comprising: forming multiple permanent magnet (PM) pieces to have the same shape, each of the PM pieces having an inner radial surface, an outer radial surface, and a pair of side surfaces extending between the inner and outer radial surfaces; attaching at least one of the side surfaces of each of the PM pieces to one of the side surfaces of another one of the PM pieces to form partitions configured to extend in a radial direction of the rotor; and cutting through at least a portion of the multiple PM pieces, to form partitions configured to extend in a tangential direction of the rotor. 2. The method of claim 1 further comprising forming the PM pieces to have substantially the same dimensions. 3. The method of claim 1 further comprising: forming the inner radial surface of each of the PM pieces to have a concave shape; forming the outer radial surface of each of the PM pieces to have a convex shape; and forming each of the side surfaces of each of the PM pieces to have a flat shape. 4. The method of claim 3 further comprising attaching at least one of the side surfaces of each of the PM pieces to one of the side surfaces of another one of the PM pieces so that the inner radial surfaces of the PM pieces form a continuous arc and the outer radial surfaces of the PM pieces form a continuous arc. 5. The method of claim 1 wherein the PM pieces include end PM pieces and at least one middle PM piece, the method further comprising: attaching each of the side surfaces of the at least one middle PM piece to one of the side surfaces of another one of the PM pieces; and attaching only one of the side surfaces of each of the end PM pieces to one of the side surfaces of another one of the PM pieces. 6. The method of claim 5 wherein cutting through at least a portion of the multiple PM pieces includes cutting through the end PM pieces, without cutting through the at least one middle PM piece. 7. The method of claim 5 further comprising: forming the end PM pieces from a first material; and forming the at least one middle PM piece from a second material that is different than the first material.
Assignees
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Classifications
- H01F41/0286Primary
Trimming · CPC title
- H02K15/03Primary
having permanent magnets · CPC title
including permanent magnet or core · CPC title
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- What does patent US11830668B2 cover?
- A method of manufacturing a permanent magnet for a rotor of an axial flux electric machine is described herein. The method includes forming multiple permanent magnet (PM) pieces to have the same shape. Each of the PM pieces has an inner radial surface, an outer radial surface, and a pair of side surfaces extending between the inner and outer radial surfaces. The method further includes attachin…
- Who is the assignee on this patent?
- Gm Global Tech Operations Llc
- What technology area does this patent fall under?
- Primary CPC classification H01F41/0286. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 28 2023 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).