CN113224862A - Local diffusion motor magnetic steel - Google Patents
Local diffusion motor magnetic steel Download PDFInfo
- Publication number
- CN113224862A CN113224862A CN202110650535.3A CN202110650535A CN113224862A CN 113224862 A CN113224862 A CN 113224862A CN 202110650535 A CN202110650535 A CN 202110650535A CN 113224862 A CN113224862 A CN 113224862A
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- magnetic steel
- rare earth
- heavy rare
- motor
- demagnetization
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000009792 diffusion process Methods 0.000 title claims abstract description 34
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims 2
- 150000002910 rare earth metals Chemical class 0.000 abstract description 30
- 239000000463 material Substances 0.000 abstract description 17
- 230000005347 demagnetization Effects 0.000 abstract description 12
- 229910052688 Gadolinium Inorganic materials 0.000 description 8
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 8
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 8
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 6
- 229910052727 yttrium Inorganic materials 0.000 description 6
- 229910052771 Terbium Inorganic materials 0.000 description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- 229910052692 Dysprosium Inorganic materials 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 4
- 229910052689 Holmium Inorganic materials 0.000 description 4
- 229910052765 Lutetium Inorganic materials 0.000 description 4
- 229910052779 Neodymium Inorganic materials 0.000 description 4
- 229910052772 Samarium Inorganic materials 0.000 description 4
- 229910052775 Thulium Inorganic materials 0.000 description 4
- 229910052769 Ytterbium Inorganic materials 0.000 description 4
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 4
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 4
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 4
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 4
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 4
- 229910052693 Europium Inorganic materials 0.000 description 3
- 229910052777 Praseodymium Inorganic materials 0.000 description 3
- -1 electronics Substances 0.000 description 3
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 3
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052773 Promethium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- YJBMMHPCGWCCOH-UHFFFAOYSA-N octan-3-yl dihydrogen phosphate Chemical compound CCCCCC(CC)OP(O)(O)=O YJBMMHPCGWCCOH-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
Abstract
The invention relates to a local diffusion motor magnetic steel, which comprises a magnetic steel body; the magnetic steel body is of a cuboid structure; one side of the magnetic steel body close to the air gap is provided with two corners; the corners are used for adopting heavy rare earth elements for local diffusion; the invention can increase the use amount of the heavy rare earth materials by adopting a diffusion technology for the permanent magnet part greatly influenced by the demagnetization magnetic field according to different influences of the demagnetization magnetic field on different positions of the permanent magnet, reduce the use amount of the heavy rare earth materials or not add the heavy rare earth materials for the permanent magnet part slightly influenced by the demagnetization magnetic field, ensure that the magnetic steel does not have corner demagnetization, and reduce the use amount of rare earth resources, thereby being more environment-friendly and low in cost, meeting the requirement that the magnetic steel does not have demagnetization in the working of the permanent magnet motor, reducing the use amount of the heavy rare earth materials and reducing the cost of the motor.
Description
Technical Field
The invention relates to the field of electricity, in particular to a permanent magnet motor for a vehicle, and especially relates to a magnetic steel of a local diffusion motor.
Background
For the design of the permanent magnet motor, before improving the performances of the motor such as torque, power, efficiency and the like, the reliability of the motor is considered more importantly, wherein the problem of demagnetization of the magnetic steel is particularly important.
When the motor runs at a large current, the corner of the magnetic steel close to one side of the air gap is demagnetized firstly, so that the performance is reduced, and in order to ensure the performance of the motor, the coercive force of the magnetic steel must be improved, so that the use amount of heavy rare earth elements is greatly increased; rare earth resources are limited, and in order to save the rare earth resources, the bulk diffusion technology is mostly adopted, but for most positions of the magnetic steel, the coercivity is not required to be so high, so that the use of the technology still causes unnecessary waste.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a local diffusion motor magnetic steel, which is used to solve the problem of heavy rare earth material waste caused by the overall diffusion of heavy rare earth elements in the existing motor magnetic steel.
To achieve the above and other related objects, the present invention provides a local diffusion motor magnetic steel, comprising: a magnetic steel body; the magnetic steel body is of a cuboid structure; one side of the magnetic steel body close to the air gap is provided with two corners; and the corners are subjected to local diffusion treatment of heavy rare earth elements.
In an embodiment of the present invention, the corner is a triangular prism, and the corner includes: a first side and a second side; the magnet steel body comprises: a first corresponding surface and a second corresponding surface; the first surface is positioned on the first corresponding surface, and the length ratio of the length of a first edge on the first surface to the length of a side corresponding to the first edge on the first corresponding surface is 1:3 to 1: 10; the second surface is located on the second corresponding surface, and the length ratio of the length of the second edge on the second surface to the length of the side of the second corresponding surface corresponding to the second edge is 1:2 to 1: 5.
In an embodiment of the present invention, the local diffusion motor magnetic steel is manufactured by a sintering technique.
As described above, the local diffusion motor magnetic steel of the present invention has the following beneficial effects:
compared with the prior art, the local diffusion motor magnetic steel provided by the invention can realize different positions according to the permanent magnet
The influence of the demagnetizing field received is different, and adopt diffusion technology to increase the heavy rare earth material quantity to the permanent magnet part that receives the influence of demagnetizing field big, to the permanent magnet part that receives the influence of demagnetizing field little reduce the quantity of heavy rare earth material or do not add heavy rare earth material, when guaranteeing that the corner demagnetization can not take place for the magnet steel, reduced the use of tombarthite resource to environmental protection and low cost more.
Drawings
Fig. 1 is a schematic structural diagram of a local diffusion motor magnetic steel according to an embodiment of the present invention.
Description of the reference symbols
1-a magnetic steel body; 101-a first corresponding face; 102-a second corresponding face; 2-corner; 201-a first side; 202-second side.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The local diffusion motor magnetic steel is used for solving the problem that heavy rare earth materials are wasted because the existing motor magnetic steel is subjected to integral diffusion of heavy rare earth elements. The principle and the embodiment of the present invention will be described in detail below, so that those skilled in the art can understand the present invention without creative work.
As shown in fig. 1, in an embodiment, the magnetic steel for the local diffusion motor of the present invention includes a magnetic steel body 1.
Specifically, the magnetic steel body 1 is of a cuboid structure; one side of the magnetic steel body 1 close to the air gap is provided with two corners 2; the corners 2 are used for local diffusion with heavy rare earth elements.
Preferably, local diffusion of heavy rare earth elements is adopted for two corners 2 (positions where demagnetization is easy to occur, corresponding to line filling areas in fig. 1) on one side of the magnetic steel body 1 close to the air gap (the magnetizing direction corresponds to the vertical direction in fig. 1, and the direction in which the magnetic steel body 1 is inserted into the magnetic steel slot corresponds to the front-back direction in fig. 1, that is, the direction perpendicular to the paper surface).
It should be noted that the heavy rare earth is called "industrial monosodium glutamate" because it is widely used in various industries such as steel, glass, ceramics, electronics, petroleum, etc., and students often classify rare earth elements into two groups of light and heavy or three groups of light, medium and heavy according to some differences in physicochemical properties and geochemical properties between rare earth elements and the requirements of separation processes. Two groups of methods use gadolinium as a boundary, and 7 elements of lanthanum, cerium, praseodymium, neodymium, promethium, samarium and europium before gadolinium are light rare earth elements, namely cerium rare earth elements; 9 elements such as terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium behind gadolinium and gadolinium are called heavy rare earth elements and also called yttrium group rare earth elements. Although yttrium has an atomic weight of only 89, it is closer in chemical nature to the heavy rare earth elements because its ionic radius is among the chain links of ionic radii of other heavy rare earth elements. And the rare earth element is symbiotic with other heavy rare earth elements in the nature. It is classified as a heavy rare earth group. The classification method of the light, medium and heavy rare earths has no certain rule, and can be divided into the following according to the solubility of the rare earth sulfate double salt: the insoluble cerium group is a light rare earth group and comprises lanthanum, cerium, praseodymium, neodymium and samarium; the slightly soluble terbium group is a medium rare earth group and comprises europium, gadolinium, terbium and dysprosium; the more readily soluble yttrium group, the heavy rare earth group, includes yttrium, holmium, erbium, thulium, ytterbium, lutetium. However, the solubility differences between adjacent elements between groups are small and cannot be resolved in this way. Groups can be grouped by extraction methods, for example, by using bis (2) ethylhexyl (phosphoric acid), i.e., P204, between neodymium/samarium, then gadolinium/terbium, etc. Lanthanum, cerium, praseodymium and neodymium are called light rare earth, samarium, europium and gadolinium are called medium rare earth, and terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium are called heavy rare earth; the rare earth element has an atomic number of 64-71, and is called heavy rare earth element (also called yttrium group) by adding 39 elements, namely gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) and yttrium (Y).
It should be noted that, although the permanent magnet diffusion technology can reduce the amount of heavy rare earth materials, it does not need such high coercive force for most positions of the magnetic steel; the invention adopts the local diffusion motor magnetic steel technology, reduces the use amount of heavy rare earth materials and reduces the product cost according to different distribution of demagnetization magnetic fields.
As shown in fig. 1, in an embodiment, the corner 2 is a triangular prism, and the corner 2 includes a first surface 201 and a second surface 202; the magnetic steel body 1 comprises a first corresponding surface 101 and a second corresponding surface 102.
Specifically, the first face 201 is located on the first corresponding face 101, and the length of the first edge on the first face 201 (corresponding to l in fig. 1)1) Length corresponding to the length of the side of the first side on the first corresponding surface 101 (corresponding to l in fig. 1)2) The ratio is 1:3 to 1: 10; the second face 202 is located on the second corresponding face 102, and the length of the second side (corresponding to l in fig. 1) on the second face 2023) The length of the side corresponding to the second side on the second corresponding surface 102 (corresponding to l in FIG. 1)4) The ratio is 1:2 to 1: 5.
It should be noted that the size of the corner 2 is not a limitation of the present invention, and in practical applications, the size may be set according to the distribution of the actual demagnetization magnetic field.
Preferably, in one embodiment,/1And l2The length ratio of (1: 6); l3And l4The length ratio of (A) to (B) is 1: 3.
In one embodiment, the local diffusion motor magnetic steel is manufactured by a sintering technology.
It should be noted that sintering is a process in which a powder or a powder compact is heated to a temperature lower than the melting point of the essential components therein and then cooled to room temperature at a certain method and speed. As a result of sintering, bonding between the powder particles occurs, the strength of the sintered body increases, and the agglomerates of the powder particles become agglomerates of grains, thereby obtaining the desired physical and mechanical properties of the article or material.
It should be noted that, in this embodiment, the local diffusion motor magnetic steel is made by a sintering technique, and the two side positions of the magnetic steel body 1 are greatly influenced by the demagnetizing field, and a heavy rare earth diffusion technique is adopted for the magnetic steel, so that the coercive force performance of the magnetic steel is effectively improved, and the use amount of heavy rare earth diffusion is reduced or heavy rare earth materials are not used for other positions on the magnetic steel which are slightly influenced by the demagnetizing field.
In summary, compared with the prior art, the local diffusion motor magnetic steel provided by the invention can increase the use amount of heavy rare earth materials by adopting a diffusion technology for the permanent magnet part greatly influenced by the demagnetizing field according to different influences of the demagnetizing field on different positions of the permanent magnet, reduce the use amount of heavy rare earth materials or not add heavy rare earth materials for the permanent magnet part slightly influenced by the demagnetizing field, ensure that the magnetic steel does not have corner demagnetization, and reduce the use amount of rare earth resources, thereby being more environment-friendly and low in cost, meeting the requirement that the magnetic steel of the permanent magnet motor does not have demagnetization in work, reducing the use amount of heavy rare earth materials and reducing the motor cost; therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. A local diffusion motor magnetic steel, comprising: a magnetic steel body;
the magnetic steel body is of a cuboid structure;
one side of the magnetic steel body close to the air gap is provided with two corners; and the corners are subjected to local diffusion treatment of heavy rare earth elements.
2. The localized diffusion electromechanical magnet of claim 1, wherein said corners are triangular prism shaped, said corners comprising: a first side and a second side; the magnet steel body comprises: a first corresponding surface and a second corresponding surface;
the first surface is positioned on the first corresponding surface, and the length ratio of the length of a first edge on the first surface to the length of a side corresponding to the first edge on the first corresponding surface is 1:3 to 1: 10;
the second surface is located on the second corresponding surface, and the length ratio of the length of the second edge on the second surface to the length of the side of the second corresponding surface corresponding to the second edge is 1:2 to 1: 5.
3. The localized diffusion flux steel for a motor of claim 1, wherein said localized diffusion flux steel is made by a sintering technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110650535.3A CN113224862A (en) | 2021-06-11 | 2021-06-11 | Local diffusion motor magnetic steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110650535.3A CN113224862A (en) | 2021-06-11 | 2021-06-11 | Local diffusion motor magnetic steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113224862A true CN113224862A (en) | 2021-08-06 |
Family
ID=77080215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110650535.3A Withdrawn CN113224862A (en) | 2021-06-11 | 2021-06-11 | Local diffusion motor magnetic steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113224862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114499080A (en) * | 2022-01-28 | 2022-05-13 | 中国科学院赣江创新研究院 | Composite permanent magnetic steel and manufacturing method thereof |
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| CN101714443A (en) * | 2008-09-29 | 2010-05-26 | 株式会社日立制作所 | Sintered magnet and rotating machine equipped with the same |
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