CN2508358Y - Rare-earth permanent magnet - Google Patents
Rare-earth permanent magnet Download PDFInfo
- Publication number
- CN2508358Y CN2508358Y CN 01257003 CN01257003U CN2508358Y CN 2508358 Y CN2508358 Y CN 2508358Y CN 01257003 CN01257003 CN 01257003 CN 01257003 U CN01257003 U CN 01257003U CN 2508358 Y CN2508358 Y CN 2508358Y
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- rare
- magnetized
- earth permanent
- air gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 16
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005415 magnetization Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model discloses a permanent magnet arranged in the iron core air gap of a direct current reactor. The permanent magnet is formed by folding and arranging a plurality of rare earth material pieces, the pieces are mutually insulated and bonded into a whole, and then the permanent magnet is magnetized, one of the two surfaces with the largest area is magnetized into N pole, and the other surface is magnetized into S pole. When the permanent magnet is applied in the iron core air gap of the direct current reactor, the eddy current is reduced.
Description
The utility model relates to the magnet steel in the power electronics industrial reactance device, particularly direct current reactor iron core air gap.
In the prior art because the D.C. magnetic biasing effect of direct current reactor causes the skew of magnetization working point, the negative consequence that causes reactance value to descend, the countermeasure of taking nothing more than:
1, only in the main magnetic circuit of reactor, increases air gap or the big reactor of employing volume surplus;
2, insert rare earth magnetic steel in the main magnetic circuit air gap of employing reactor, offset the D.C. magnetic biasing that the reactor winding produces with permanent magnetic potential.
In the above method 1, the magnetic flow direct current component that the direct current reactor winding produces is still bigger to the influence of reactance value.
Yet in the above method 2, permanent magnetic steel is clipped in middle (referring to Fig. 2) main magnetic circuit of main magnetic circuit not only big DC component B
O, and a large amount of alternating current component B is arranged
～, the DC component B that winding produces
OHope is by the magnetic potential B of permanent magnet
AOffset fully.But remaining alternating current component B
～Can in permanent magnet, produce eddy current loss.
The purpose of this utility model provides a kind of magnet structure, makes eddy current loss minimum under the upper frequency, and makes easily, and is cheap.
For this reason, the technical solution of the utility model is as follows: a kind of rare-earth permanent magnet of chip shape, and it is made up of some rare earth material sheet closed assemblies, mutual insulating and bonding one-tenth are whole between sheet, then this permanent magnet is magnetized, the utmost point for N is simultaneously filled on the two sides of area maximum, and another side fills the utmost point for S.
Because this rare-earth permanent magnet is made up of some rare earth material sheet mutual insulatings, magnetize again after closed assembly is bonding, make handling ease, eddy current loss reduction in being applied in the direct current reactor iron core air gap.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the structural map of rare-earth permanent magnet.
Fig. 2 is applied in principle schematic in the direct current reactor iron core air gap for rare-earth permanent magnet.
As shown in Figure 1, rare-earth permanent magnet is made up of some rare earth material sheet 2 closed assemblies, and mutual insulating and bonding one-tenth are whole between the rare earth material sheet 2, then this rare-earth permanent magnet are magnetized, and the face 3 of area maximum fills the utmost point for N, and corresponding surface 4 fills the utmost point for S.
Permanent magnet material is selected high energy product neodymium iron boron for use, and in material, magnetization orientation is with actual magnetic flux direction unanimity, shape is done slabbing, and the making most convenient of sheet is to make bulk earlier, cuts with wire cutting machine then, use insulating material between sheet, for example paper, lacquer insulate.In laminating mould, laminate, bonding or become monoblock with epoxy sealing.Be ground to after the shaping and require size, magnetize at last.During application, see clearly the orientation (magnetic pole as shown in Figure 2) that the dc magnetization direction and the permanent magnets direction of magnetization offset, in the air gap of the core of reactor of packing into.
Claims (1)
1. rare-earth permanent magnet, it is a chip shape, it is characterized in that: this permanent magnet is made up of some rare earth material sheet closed assemblies, mutual insulating and bonding one-tenths integral body between sheet; Then this permanent magnet is magnetized, the utmost point for N is simultaneously filled on the two sides of area maximum, and another side fills the utmost point for S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257003 CN2508358Y (en) | 2001-12-24 | 2001-12-24 | Rare-earth permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257003 CN2508358Y (en) | 2001-12-24 | 2001-12-24 | Rare-earth permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2508358Y true CN2508358Y (en) | 2002-08-28 |
Family
ID=33665857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01257003 Expired - Lifetime CN2508358Y (en) | 2001-12-24 | 2001-12-24 | Rare-earth permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2508358Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1985339B (en) * | 2004-02-03 | 2010-12-08 | 美国宇航公司 | Permanent magnet assembly |
| CN102064617A (en) * | 2011-01-17 | 2011-05-18 | 江西特种电机股份有限公司 | Composite magnetic steel |
| CN104332263A (en) * | 2014-10-28 | 2015-02-04 | 浙江大学 | Sintering type rare earth permanent magnet capable of reducing eddy-current loss and manufacturing method thereof |
| CN105896773A (en) * | 2016-05-27 | 2016-08-24 | 天津大学 | Slot-type permanent magnet, axial flux permanent magnet motor rotor and radial flux permanent magnet motor rotor |
| CN109004773A (en) * | 2018-09-12 | 2018-12-14 | 宁波安信数控技术有限公司 | A kind of magnetic steel structure |
| CN115064337A (en) * | 2022-06-07 | 2022-09-16 | 西北核技术研究所 | A permanent magnet configuration suitable for relativistic high-power microwave devices |
-
2001
- 2001-12-24 CN CN 01257003 patent/CN2508358Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1985339B (en) * | 2004-02-03 | 2010-12-08 | 美国宇航公司 | Permanent magnet assembly |
| CN102064617A (en) * | 2011-01-17 | 2011-05-18 | 江西特种电机股份有限公司 | Composite magnetic steel |
| CN102064617B (en) * | 2011-01-17 | 2012-08-08 | 江西特种电机股份有限公司 | Composite magnetic steel |
| CN104332263A (en) * | 2014-10-28 | 2015-02-04 | 浙江大学 | Sintering type rare earth permanent magnet capable of reducing eddy-current loss and manufacturing method thereof |
| CN104332263B (en) * | 2014-10-28 | 2016-09-14 | 浙江大学 | A kind of slug type rare-earth permanent magnet reducing eddy-current loss and preparation method thereof |
| CN105896773A (en) * | 2016-05-27 | 2016-08-24 | 天津大学 | Slot-type permanent magnet, axial flux permanent magnet motor rotor and radial flux permanent magnet motor rotor |
| CN109004773A (en) * | 2018-09-12 | 2018-12-14 | 宁波安信数控技术有限公司 | A kind of magnetic steel structure |
| CN115064337A (en) * | 2022-06-07 | 2022-09-16 | 西北核技术研究所 | A permanent magnet configuration suitable for relativistic high-power microwave devices |
| CN115064337B (en) * | 2022-06-07 | 2024-05-14 | 西北核技术研究所 | Permanent magnet configuration suitable for relativistic high-power microwave device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU INSTITUTE OF ELECTRONICS CO. Free format text: FORMER NAME OR ADDRESS: CHENGDU HOPE ELECTRONIC RESEARCH INSTITUTE |
|
| CP03 | Change of name, title or address |
Address after: No. 181, Airport Road, Sichuan, Chengdu: 610225 Patentee after: Chengdu Hope Electronic Institute Co., Ltd. Address before: Zhang Xianzhi, 181 Airport Road, Sichuan, Chengdu Province, zip code: 610225 Patentee before: Xiwang Electronic Research Inst. Chengdu City |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111224 Granted publication date: 20020828 |