CN104333150A - Halbach permanent magnet array of convex magnetic block - Google Patents
Halbach permanent magnet array of convex magnetic block Download PDFInfo
- Publication number
- CN104333150A CN104333150A CN201410602830.1A CN201410602830A CN104333150A CN 104333150 A CN104333150 A CN 104333150A CN 201410602830 A CN201410602830 A CN 201410602830A CN 104333150 A CN104333150 A CN 104333150A
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- China
- Prior art keywords
- permanent magnet
- halbach
- magnetic
- array
- magnetic field
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/08—Salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
Abstract
The invention discloses a Halbach permanent magnet array of a convex magnetic block. The permanent magnet array is characterized in that the magnetism line distribution is closer to the sinusoidal distribution on the basis of keeping the basic characteristics of the Halbach permanent magnet array; meanwhile, the strength of a magnetic field is improved; the general Halbach permanent array is of a magnetic array structure which arranges and integrally combines the magnetic blocks with rectangular cross sections along the radial magnetizing direction and tangential magnetizing direction, and therefore, the strength of the magnetic field at one side of the permanent magnet array is highly increased and while the strength of the magnetic field at the other side is highly reduced; a large deviation occurs between the magnetic field distribution and sinusoidal distribution, so that the general Halbach magnetic field characteristics cannot meet the high-precision requirement of precise positioning and other application places. The Halbach magnet array of the magnetic block with the convex cross section is characterized in that each magnetic block is equipped with the convex sections and is arranged by the Halbach array mode; therefore, the sinusoidal distribution characteristic of the magnetic field is improved under the same size and rest magnetic induction intensity; moreover, the magnetic field strength is improved to some extent. The Halbach permanent magnet array of the convex magnetic block is mainly applied to the permanent array of a linear permanent magnet motor and a rotary permanent magnet motor.
Description
Technical field
The present invention relates to magneto field, comprise the manufacture of permanent magnet linear motor structural design.
Background technology
1979, American scholar Klaus Halbach, when doing Accelerating electron experiment, found a kind of special permanent magnet arrayed mode, has been called Halbach permanent magnet array.In Halbach permanent magnet array, because tangential magnetic field superposes and counteracting with the mutual of radial magnetic field, the magnetic field intensity of permanent magnet array side is increased considerably, and the magnetic field intensity of opposite side significantly weaken.Under the condition keeping permanent magnets constancy of volume, can by the air gap density adopting Halbach array to improve motor.
At present, the application of Halbach permanent magnet array is mainly directly applied in high-energy physics, high-speed electric expreess locomotive, maglev train system, magnetic bearing and medical science aspect, is especially widely used in motor.Some precision apparatus, as provided the linear electric motors of power for nanoscale detent mechanism, in order to obtain better control performance, need magnetic array to provide close to perfect sinusoidal magnetic field, and the magnetic field that common Halbach permanent magnet array generates and perfect sinusoidal magnetic field have larger gap.
Summary of the invention
The object of the invention is to the problem that the magnetic field that generates for existing Halbach permanent magnet array and perfect sinusoidal magnetic field have larger gap, propose a kind of Halbach permanent magnet array of convex cross section magnetic patch, replace the square-section magnetic patch that common Halbach permanent magnet array adopts.The magnetic field of this permanent magnet array has the magnetic field intensity of more perfect Sine distribution and Geng Gao.
The magnetic patch that permanent magnet array is convex by cross section arranges and forms.The invention has the advantages that: magnetic array side can be formed close to perfect sinusoidal magnetic field, and the magnetic field of opposite side is significantly reduced, magnetic field space utilance is large, the uniformity is high, leakage field is few.Strong side, magnetic field for generation of motor-driven Lorentz force, opposite side due to magnetic field very weak, very little to the interference of surrounding environment.
Accompanying drawing explanation
The feature cross-section schematic diagram of the specific embodiment of the invention that Fig. 1 is made up of 9 pieces of convex magnetic patch.
Fig. 2 is the cross sectional dimensions relation schematic diagram of convex magnetic patch.
Fig. 3 is common Halbach array magnetic line of force distribution map.
Fig. 4 is convex magnetic patch Halbach array magnetic line of force distribution map of the present invention.
The comparison diagram of the magnetic density of two kinds of magnetic arrays when Fig. 5 is distance magnetic array lower surface 0.4mm.
The comparison diagram of the magnetic density of two kinds of magnetic arrays when Fig. 6 is distance magnetic array lower surface 0.6mm.
Fig. 7 is the linear electric motors example sketch adopting convex magnetic patch Halbach permanent magnet array to form.
Embodiment
As shown in Figure 1, the specific embodiment of the invention is be the permanent magnet block of convex by equal and opposite in direction, several piece cross section that shape is identical, the residual magnetic flux density size of every block magnetic patch is identical, a cuboid is arranged in by Halbach magnetic arrayed mode, for the permanent magnet array of linear electric motors, Fig. 1 is the example that 9 pieces of magnetic patch form magnetic array, and 9 pieces of permanent magnets can produce
the sinusoidal magnetic field in individual cycle, by changing the stroke size of linear electric motors by the number of same arrangement regulation increase and decrease magnetic patch.In Fig. 1, arrow is depicted as each magnetic patch direction of magnetization.
As shown in Figure 2, in the cross section of convex magnetic patch, entirety is centrally symmetrical, and magnetic patch width is L, is highly H, and boss width is L/3, is highly H/2.
Figure 3 shows that the magnetic line of force distribution of common Halbach array both sides.Magnetic field at the upper side of visible magnetic array is weakened, and the magnetic field of below is enhanced.
The magnetic line of force distribution of convex magnetic patch Halbach array both sides of the present invention as shown in Figure 4.The magnetic field intensity below magnetic array is further enhancing compared with visible and common Halbach magnetic array.
Fig. 5 is the magnetic density curve at distance two kinds of permanent magnet array lower surface 0.2mm plane places, Fig. 6 is the magnetic density curve at distance two kinds of permanent magnet array lower surface 0.4mm plane places, and the Distribution of Magnetic Field of visible convex magnetic patch Halbach permanent magnet array is closer to Sine distribution.
Fig. 7 is that the coil that convex magnetic patch Halbach permanent magnet array is corresponding with below forms linear electric motors example, after passing into time dependent three-phase symmetrical sinusoidal current, produces the air-gap field of the sinusoid distribution of translation in coil.The air-gap field that the magnetic field of convex magnetic patch Halbach permanent magnet array and coil produce interacts, and produces electromagnetic push, when coil is fixing, and the direction moving linearly that permanent magnet array will move along travelling-magnetic-field.
Claims (3)
1. for a convex magnetic patch Halbach permanent magnet array for magneto, it is characterized in that permanent magnets cross section is convex, arrangement mode is Halbach arrangement.
2. convex magnetic patch Halbach permanent magnet array according to claim 1, it is characterized in that the shape of cross section relative altitude direction of convex magnetic patch is symmetrical, boss height is 1/2nd of whole height, and boss width is 1/3rd of overall width.
3. convex magnetic patch Halbach permanent magnet array according to claim 1, is characterized in that convex magnetic patch is forward and reverse and is alternately arranged, and every four pieces are one group and form a Distribution of Magnetic Field cycle, and every block convex magnetic patch magnetizes according to Halbach array magnetizing direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602830.1A CN104333150A (en) | 2014-11-02 | 2014-11-02 | Halbach permanent magnet array of convex magnetic block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602830.1A CN104333150A (en) | 2014-11-02 | 2014-11-02 | Halbach permanent magnet array of convex magnetic block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104333150A true CN104333150A (en) | 2015-02-04 |
Family
ID=52407824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410602830.1A Pending CN104333150A (en) | 2014-11-02 | 2014-11-02 | Halbach permanent magnet array of convex magnetic block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104333150A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017042273A1 (en) * | 2015-09-11 | 2017-03-16 | Beckhoff Automation Gmbh | Magnetic assembly for an electric motor |
| CN106849409A (en) * | 2016-11-11 | 2017-06-13 | 南方电机科技有限公司 | A kind of motor including HALBACH arrays and the equipment including the motor |
| CN107612252A (en) * | 2017-11-02 | 2018-01-19 | 合肥工业大学 | A kind of birotor axial disk magneto |
| CN107681854A (en) * | 2017-11-02 | 2018-02-09 | 合肥工业大学 | A kind of axial permanent magnetic motor |
| US20220149684A1 (en) * | 2020-11-10 | 2022-05-12 | Seiko Epson Corporation | Axial gap motor and radial gap motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346345A (en) * | 2000-05-31 | 2001-12-14 | Sodick Co Ltd | Rotor of synchronous machine |
| JP2006129616A (en) * | 2004-10-28 | 2006-05-18 | Nidec Shibaura Corp | Rotor |
| JP2007312449A (en) * | 2006-05-16 | 2007-11-29 | Yaskawa Electric Corp | Periodic magnetic field generator and motor employing the same |
| CN102185458A (en) * | 2011-05-18 | 2011-09-14 | 哈尔滨工业大学 | High-precision slotless permanent magnet motor |
| CN102437710A (en) * | 2010-09-29 | 2012-05-02 | 山洋电气株式会社 | Moving magnetic field generating apparatus |
| CN102594086A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨工业大学 | High-power density permanent magnet motor |
-
2014
- 2014-11-02 CN CN201410602830.1A patent/CN104333150A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346345A (en) * | 2000-05-31 | 2001-12-14 | Sodick Co Ltd | Rotor of synchronous machine |
| JP2006129616A (en) * | 2004-10-28 | 2006-05-18 | Nidec Shibaura Corp | Rotor |
| JP2007312449A (en) * | 2006-05-16 | 2007-11-29 | Yaskawa Electric Corp | Periodic magnetic field generator and motor employing the same |
| CN102437710A (en) * | 2010-09-29 | 2012-05-02 | 山洋电气株式会社 | Moving magnetic field generating apparatus |
| CN102185458A (en) * | 2011-05-18 | 2011-09-14 | 哈尔滨工业大学 | High-precision slotless permanent magnet motor |
| CN102594086A (en) * | 2012-02-02 | 2012-07-18 | 哈尔滨工业大学 | High-power density permanent magnet motor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017042273A1 (en) * | 2015-09-11 | 2017-03-16 | Beckhoff Automation Gmbh | Magnetic assembly for an electric motor |
| CN107925338A (en) * | 2015-09-11 | 2018-04-17 | 倍福自动化有限公司 | The magnetic combination of motor |
| US10291085B2 (en) | 2015-09-11 | 2019-05-14 | Beckhoff Automation Gmbh | Magnetic assembly for an electric motor |
| CN106849409A (en) * | 2016-11-11 | 2017-06-13 | 南方电机科技有限公司 | A kind of motor including HALBACH arrays and the equipment including the motor |
| WO2018086586A1 (en) * | 2016-11-11 | 2018-05-17 | 南方电机科技有限公司 | Motor comprising halbach array and apparatus comprising same |
| CN106849409B (en) * | 2016-11-11 | 2020-10-30 | 南方电机科技有限公司 | Motor comprising HALBACH array and equipment comprising motor |
| CN107612252A (en) * | 2017-11-02 | 2018-01-19 | 合肥工业大学 | A kind of birotor axial disk magneto |
| CN107681854A (en) * | 2017-11-02 | 2018-02-09 | 合肥工业大学 | A kind of axial permanent magnetic motor |
| US20220149684A1 (en) * | 2020-11-10 | 2022-05-12 | Seiko Epson Corporation | Axial gap motor and radial gap motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150204 |
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| RJ01 | Rejection of invention patent application after publication |