CN103986248B - Rare earth element annular magnet with the utensil for receiving impurity particle - Google Patents
Rare earth element annular magnet with the utensil for receiving impurity particle Download PDFInfo
- Publication number
- CN103986248B CN103986248B CN201410047406.5A CN201410047406A CN103986248B CN 103986248 B CN103986248 B CN 103986248B CN 201410047406 A CN201410047406 A CN 201410047406A CN 103986248 B CN103986248 B CN 103986248B
- Authority
- CN
- China
- Prior art keywords
- annular magnet
- utensil
- motor
- transitional region
- pole
- 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 - Fee Related
Links
- 239000002245 particle Substances 0.000 title claims abstract description 20
- 239000012535 impurity Substances 0.000 title claims abstract description 18
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 11
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000005291 magnetic effect Effects 0.000 claims description 20
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 4
- 239000012811 non-conductive material Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/06—Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
Abstract
The present invention relates to a kind of annular magnets, include a rare earth metal at least partly, have the shape of hollow cylinder-like, and axially extend, wherein it has an inner surface, and a utensil for accommodating impurity particle is arranged on the internal surface.The invention further relates to a kind of methods for manufacturing this annular magnet.
Description
Technical field
The present invention relates to a kind of annular magnets, axially extend, and in hollow cylinder-like construct, and at least partly
Ground includes a rare earth metal, and the invention further relates to a kind of methods for manufacturing the annular magnet.
Background technology
The machine of electricity is, for example, electro-motor, starter, generator or auxiliary drive for example for the tune of motor vehicle
Whole driving device.In the machine of these electricity, it is known that rotor or stator are designed with permanent magnet to generate permanent magnetic field.Here,
In the scope of the ultraminiaturization of the machine or in order to improve the exportable power of machine, permanent magnet, their portions are usually used
It includes rare earth metal to divide ground.
Such as known following rotor and stator, wherein permanent magnet axially extends with radial direction in rotor or stator,
And it is tangentially magnetized or permanent magnet axially and tangentially extends and along radial direction in rotor or stator by magnetic
Change.Thus using ring segment-shaped or cuboid the permanent magnet of circle, they are engaged in the portion of leaving a blank of matrix and are consolidated later
It is fixed.In these rotors or stator, processing, peeling that spot particle and impurity particle, such as metal fillings can be by ferromagnetic materials
Etc., it is transmitted by the rotation of rotor until being formed by by the place of leaving a blank in matrix during the machine operation of the electricity
It gap and deposits there.
Known in addition, using annular magnet, they are axially extended, and are constructed to hollow cylinder-like and along radial direction
It is magnetized.There is this annular magnet the opposite magnetized area of alternation, these regions to form the magnetic arctic or the south of magnetism
Pole.The shortcomings that these annular magnets, is deposited in the air gap that impurity particle, especially magnetic-particle can be between rotor and stator
Get off.Due to selecting as small as possible by air gap to realize machine power as big as possible, this impurity particle meeting
Cause to rub and therefore lead to power loss, and leads to the running noise of machine in electricity.
Invention content
Therefore the task of the present invention is propose a kind of machine of the electricity with annular magnet, wherein impurity particle is in air gap
In cause friction and the danger of noise to be reduced or be not present.
The task using a kind of annular magnet solve, be hollow cylinder-like construct and be concentrically surrounding an axis
It axially extends, and includes a rare earth metal at least partly, wherein the rare earth metal has a surface, on the surface
Utensil of the upper setting one for accommodating impurity particle.The utensil can realize the deposition for the impurity particle for defining size and therefore rise
To the effect of material subsidence part.Thus impurity particle that diameter can also be more than to width of air gap is received into the utensil.
Preferably, the rare earth metal is neodymium, wherein the annular magnet is neodymium-iron-boron magnet.But the present invention is unlimited
In the embodiment of annular magnet, but other annular magnets can also be used, especially other rare earth metals.
The utensil is preferably a groove or groove.It is particularly preferred that it is on the entire axial length of the annular magnet
Extend.Therefore, when rotor rotates, it is being deposited in air gap and cause friction impurity particle in the whole of the annular magnet
It is detected by the utensil in a length.But in principle it is also contemplated that other recess are used as utensil, such as ellipse or circle
The recess of shape, or the model that is made of largely especially straight utensil.
The utensil preferably axially extends as the crow flies, either at an angle extends or arc with axial as the crow flies
Ground axially extends.The utensil is with axial at an angle or arc towards the advantages of axial arrangement, miscellaneous
Matter particle not only deposits in the utensil, but also along the utensil from wherein being transported.
Preferably, the depth of the groove have the annular magnet wall thickness be less than 20%, particularly preferably less than 10%.
Thus the stability of the annular magnet is maintained.
The surface is the surface of the restriction annular magnet.In a preferred embodiment, the surface is
The inner surface towards axis of the annular magnet.It is also preferable that it is the annular magnet away from the outer surface of axis.
It is then preferred that a kind of annular magnet, has the pole transitional region between a magnetic north and a magnetic south,
Wherein, the arrangement of implement is in a pole transitional region, to which it does not influence magnetic flux density.It is particularly preferred that the annular magnetic
Iron has multiple pole transitional regions, wherein one utensil of system is drawn in each pole transitional region.Thus impurity particle is as fast as possible
Fast ground is detected by the utensil.
The annular magnet is preferably plastics combination or resin-bonded.In a preferred embodiment, it is
It is formed one-piece.It is a kind of also, it is preferred that embodiment in, the pole transitional region by a magnetic non-conductive material,
Especially plastics are formed.
The task also utilizes rotor or stator a solution for electro-motor, with a kind of such annular magnetic
Iron.The task is also solved using a kind of machine of electricity, especially electro-motor, which has a kind of such rotor
Or stator.Since the annular magnet includes the utensil, the impurity in air gap between the stator and rotor
Particle deposits in the utensil, so that it will not lead to friction between the stator and the rotor and the machine fortune in the electricity
Noise in row.
The task also utilizes a kind of adjustment driving device for motor to solve, which has as one kind
The machine of electricity.But the machine of the electricity can be used for other electrical equipments, for example for hand held power machine.
Method of the task also using a kind of for manufacturing annular magnet solves, wherein the utensil is described in extruding
System is drawn during or after annular magnet to wherein.System is drawn during squeezing the annular magnet for the utensil, preferably
, it is adapted with the shape of compression tool.But in order to avoid manufacturing new compression tool, accordingly it is also preferred that, the utensil
Only just drawn in system to the annular magnet after pressing.
Preferably, the annular magnet just coated after drawing the system utensil, to make it be reliably prevented corrosion.
In addition the transition of sharp arris is thus avoided.But a kind of embodiment without coating of the annular magnet is also preferred
's.
Description of the drawings
The description present invention with reference to the accompanying drawings.Attached drawing is merely exemplary and does not limit total inventive concept.
Fig. 1 show one pass through annular magnet according to the present invention section and
Fig. 2 exists（a）With（b）In respectively illustrate annular magnet according to the present invention different embodiments solid
View.
Specific implementation mode
The annular magnet 1 of Fig. 1 be hollow cylinder-like construct and be concentrically surrounding an axis 2 and axially 21 prolong
It stretches.It has there are four magnetic pole N, S, draws one pole transitional region 14 of system respectively between them.Described magnetic pole N, S are alternately mutually reciprocal
It is magnetized to ground, to which a magnetic north N replaces with a magnetic south S.They are mutually arranged with equivalent spacing, to described
Pole transitional region 14 is also equally mutually arranged.
The annular magnet 1 has one to limit its surface 12, wherein is hereinafter referred to as away from the surface of axis 12
Outer surface 121, and the surface 12 towards axis is hereinafter referred to as inner surface 120.
Utensil 11 processed is drawn on the inner surface 120 in the pole transitional region 14, they are arranged for accommodating impurity
Particle（It is not shown）.Therefore the utensil 11 forms the subsidence part for impurity particle.They are also configured as axially herein
21 grooves extended.The groove has the profile of u shapes.But it can also be v-shaped, rounding or other profiles.It is same below
Free burial ground for the destitute uses concept utensil 11 and groove.
The profile 111 with u shapes in the case of annular magnet 1 of the utensil 11.It may also be other profiles
111, such as v-shaped or circular profile（It is not shown）.Importantly, the depth 115 of the utensil 11 is compared to the annular magnetic
The wall thickness 15 of iron 1 is smaller, to make the stability of the annular magnet 1 will not be significantly by one or more of utensils 11
Influence.
In an illustrated embodiment, the annular magnet 1 is formed one-piece.In the pole transitional region 14,
It is made of the same magnetic material such as in the region of magnetic pole N, S.But following annular magnet 1 be also it is preferred, they
In the pole transitional region 14 by another material, preferably magnetic non-conductive material, such as plastics are made.If the pole
Transitional region 14 is made of another material, then its by the manufacture of plastics due to its magnetic non-conductive characteristic and relative to by gold
The manufacture of category is more preferable.
Schematically shown in phantom in the inner cavity of the annular magnet 1 in Fig. 1 shown in the machine 3 of an electricity
The machine part 31 arranged interiorly, to which the annular magnet 1 shows the outer portion 32 of the machine 3 of the electricity.Described interior
An air gap 33 is depicted between part 31 and the outer portion 32.Inessential to be, the machine 3 of the electricity has the ring
The inside points 21 or outer portion 32 of shape magnet 1 be stator, the i.e. described electricity machine 3 fixed part or rotor, the i.e. described electricity
Machine 3 rotating part.Therefore the present invention can also not only use on inner rotary body machine on outer rotary body.
Since the setting of the utensil 11 draws system in institute for accommodating the impurity particle in the air gap 33, the utensil
It states on the side towards the air gap 33 of annular magnet 1.Annular magnet 1 depicted herein has institute on its inner surface 120
Utensil 11 is stated, the outer portion 32 to annular magnet setting for the machine 3 of an electricity.It is preferred here that the outside
32 are divided to form the stators（Inner rotary body）.But this annular magnet can also be directed to a rotor in principle（Outer rotary body）Make
With.
But the annular magnet 1 with the utensil 11 being arranged on its outer surface 121 is also preferred, and the utensil setting is used
In the inside points 32 of the machine 3 of an electricity, it is preferred for rotor（Inner rotary body）.But this annular magnet can also be directed in principle
One stator（Outer rotary body）It uses.
Two annular magnets 1 shown in fig. 2 be also concentrically surrounding axis 2 extension, construct to hollow cylinder-like and
There is the utensil 11 on their inner surface 120.But mutually difference lies in the arrangements of the utensil 120 for they.
Exactly, Fig. 2（a）Annular magnet 1 utensil 11 as the crow flies axially 21 and in the annular magnet 1
Entire axial length 13 on extend.Fig. 2（b）Annular magnet 1 utensil 11 equally as the crow flies but with it is axial 21 at an angle
Ground extends.Have the following advantages that that is, impurity particle not only can be in the device with axial 21 arrangements at an angle
It deposits, and can also be transported from the utensil 11 in tool 11.
Claims (15)
1. annular magnet（1）, be hollow cylinder-like construct and be concentrically surrounding an axis（2）Axially（21）Prolong
It stretches, and includes a rare earth metal at least partly, wherein the rare earth metal has a surface（12）, which is characterized in that
Its surface（12）Utensil of the upper setting one for accommodating impurity particle（11）, wherein the utensil（11）Be groove or groove simultaneously
And as the crow flies with axial direction（21）It is at an angle（Ө）Ground extend or arc axially（21）Extend.
2. annular magnet described in accordance with the claim 1（1）, which is characterized in that the annular magnet has an axial length
（13）, wherein the utensil（11）In entire axial length（13）Upper extension.
3. according to annular magnet as claimed in claim 1 or 2（1）, which is characterized in that the surface（12）It is the annular magnet
（1）The inner surface towards axis（120）Or away from the outer surface of axis（121）.
4. according to annular magnet as claimed in claim 1 or 2（1）, which is characterized in that the annular magnet has in a magnetic north
Pole（N）With a magnetic south（S）Between pole transitional region（14）, wherein the utensil（11）It is arranged in a pole transitional region
（14）In.
5. according to annular magnet as claimed in claim 1 or 2（1）, which is characterized in that the annular magnet has multiple utensils
（11）, wherein in each pole transitional region（14）One utensil of middle arrangement（11）.
6. according to annular magnet as claimed in claim 1 or 2（1）, which is characterized in that the annular magnet is that a plastics combine
Or the annular magnet of resin-bonded（1）.
7. according to annular magnet as claimed in claim 1 or 2（1）, which is characterized in that the annular magnet is to be formed one-piece
's.
8. annular magnet according to claim 4（1）, which is characterized in that the pole transitional region is by magnetic non-conductive
Material is formed.
9. annular magnet according to claim 8（1）, which is characterized in that the pole transitional region is formed by plastics.
10. for the rotor or stator of electro-motor, have according to the annular magnet described in one of preceding claims（1）.
11. motor has rotor or stator according to claim 10.
12. motor according to claim 11, which is characterized in that the motor is electro-motor.
13. for the adjustment driving device of motor vehicle, with one according to the motor described in claim 11 or 12.
14. for manufacturing according to the annular magnet described in one of claim 1-9（1）Method, which is characterized in that the utensil
（11）Squeezing the annular magnet（1）During or after drawn system in the annular magnet.
15. according to the method for claim 14, which is characterized in that the annular magnet（1）Drawing the system utensil（11）
Coated later.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201310202190 DE102013202190A1 (en) | 2013-02-11 | 2013-02-11 | Ring magnet for rotor of electrical machine of motor car, is formed as hollow cylindrical shape and is extended concentrically about axis in axial direction, and has groove for receiving dirt particles that is arranged on inner surface |
| DE102013202190.9 | 2013-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103986248A CN103986248A (en) | 2014-08-13 |
| CN103986248B true CN103986248B (en) | 2018-08-07 |
Family
ID=51226252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410047406.5A Expired - Fee Related CN103986248B (en) | 2013-02-11 | 2014-02-11 | Rare earth element annular magnet with the utensil for receiving impurity particle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103986248B (en) |
| DE (1) | DE102013202190A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015207915A1 (en) | 2015-04-29 | 2016-11-03 | Robert Bosch Gmbh | Ring magnet with slots for receiving foreign particles, as well as an electric machine including such, and a method for producing such |
| DE102015219075A1 (en) | 2015-10-02 | 2017-04-06 | Robert Bosch Gmbh | Electric machine, in particular permanently excited electrical machine, with an adhesive surface for adhering foreign particles |
| CN112436710A (en) * | 2020-11-06 | 2021-03-02 | 兰州空间技术物理研究所 | Rotor structure of cylindrical moving-magnet linear motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1538731A1 (en) * | 1966-06-28 | 1969-05-14 | Max Baermann | Small electric machine |
| TW304005U (en) * | 1992-03-18 | 1997-04-21 | Sumitomo Spec Metals | Radial anisotropic cylinder type ferrite magnets and motors |
| JP2004129329A (en) * | 2002-09-30 | 2004-04-22 | Hitachi Koki Co Ltd | Permanent magnet commutator motor |
| JP2007215382A (en) * | 2006-02-13 | 2007-08-23 | Asmo Co Ltd | Motor |
| CN101404435B (en) * | 2008-07-11 | 2010-06-16 | 浙江大学 | Magnetic field speed reduction type low speed large torque moment permanent-magnet brushless DC motor |
| CN101777818A (en) * | 2009-01-09 | 2010-07-14 | 德昌电机(深圳)有限公司 | Permanent magnet motor |
-
2013
- 2013-02-11 DE DE201310202190 patent/DE102013202190A1/en not_active Withdrawn
-
2014
- 2014-02-11 CN CN201410047406.5A patent/CN103986248B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103986248A (en) | 2014-08-13 |
| DE102013202190A1 (en) | 2014-08-14 |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 |
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