CN109904940A - Motor and its stator, rotor and magnet - Google Patents
Motor and its stator, rotor and magnet Download PDFInfo
- Publication number
- CN109904940A CN109904940A CN201910082481.8A CN201910082481A CN109904940A CN 109904940 A CN109904940 A CN 109904940A CN 201910082481 A CN201910082481 A CN 201910082481A CN 109904940 A CN109904940 A CN 109904940A
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- China
- Prior art keywords
- magnet
- motor
- main
- magnetic pole
- rotor
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- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 7
- 229910052771 Terbium Inorganic materials 0.000 claims description 7
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 7
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 3
- 229920006335 epoxy glue Polymers 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 7
- 230000005347 demagnetization Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 150000002910 rare earth metals Chemical class 0.000 abstract description 4
- 230000010354 integration Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Abstract
The invention belongs to motor fields, specifically provide a kind of motor and its stator, rotor and magnet.Present invention seek to address that the problem of magnet steel higher cost of the high-coercive force of existing motor.Thus, magnet of the invention includes main magnet and secondary magnet, the main magnet includes the first magnetic pole and the second magnetic pole, and at least one of first magnetic pole and second magnetic pole are provided with the secondary magnet, and the coercivity of the main magnet is less than the coercivity of the secondary magnet.When the present invention is had in the magnet applications to rotor and/or motor stator of above structure, influence of the armature to magnet can not only be effectively canceled out, so that being effectively prevented from magnet demagnetization phenomenon occurs；Simultaneously compared with the monolith magnet steel in the prior art with high-coercive force, reduces the dosage of rare earth material, saved production cost.
Description
Technical field
The invention belongs to motor fields, specifically provide a kind of motor and its stator, rotor and magnet.
Background technique
With the rapid development of electric car, there is the technological innovation of a new round in motor.Due to compact in electric car
Space limitation, and to the rigors (low speed high torque and high speed invariable power) of motor performance, so that motor has to subtract
Small size improves performance and improves reliability.This proposes stern challenge to the design of motor, especially in the body of motor
Product can reduce the radiating efficiency of motor when reducing.When temperature of rotor is excessively high, the permanent magnet (magnet steel) of motor often occurs not
Reversible demagnetization phenomenon.
The permanent magnet of current motor is usually the magnet steel of monolith, and in order to avoid magnet steel demagnetization, monolith magnet steel is all made of high rectify
The magnet steel of stupid power.But certainly will thus will lead to the increase of rare earth material dosage on magnet steel, thus increase magnet steel at
This.If, although meeting the requirement of magnet steel cost, it is existing that demagnetization easily occurs for magnet steel using the magnet steel of low-coercivity again
As influencing the service performance and service life of motor.
Correspondingly, this field needs a kind of new motor magnet to solve the above problems.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve existing motor high-coercive force magnet steel cost compared with
High problem, the present invention provides a kind of magnet, the magnet includes main magnet and secondary magnet, and the main magnet includes the first magnetic
Pole and the second magnetic pole are provided with the secondary magnet, the master at least one of first magnetic pole and second magnetic pole
The coercivity of magnet is less than the coercivity of the secondary magnet.
In the optimal technical scheme of above-mentioned magnet, the main magnet is fixedly connected or is made into integration with the secondary magnet.
In the optimal technical scheme of above-mentioned magnet, the main magnet and the secondary magnet are connected to one by Wear Characteristics of Epoxy Adhesive
It rises.
In the optimal technical scheme of above-mentioned magnet, the main magnet is made of permanent-magnet alloy；And/or the pair
Magnet uses the permanent-magnet alloy with rare earth element to be made.
In the optimal technical scheme of above-mentioned magnet, the rare earth element penetrates into the secondary magnet by diffusion technique
On.
In the optimal technical scheme of above-mentioned magnet, the rare earth element includes terbium and/or dysprosium.
In the optimal technical scheme of above-mentioned magnet, the volume of the pair magnet is less than the volume of the main magnet.
In addition, being provided with the preferred of multiple above-mentioned magnets on the rotor the present invention also provides a kind of rotor of motor
Magnet described in any one of technical solution.
In addition, being provided with the preferred of multiple above-mentioned magnets on the stator the present invention also provides a kind of stator of motor
Magnet described in any one of technical solution.
Further, the present invention also provides a kind of motor, the motor includes above-mentioned rotor and/or above-mentioned stator.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, by the one of main magnet
Secondary magnet is set on a or two magnetic poles, and makes the coercivity of main magnet less than the coercivity of secondary magnet, so that magnetic of the invention
Body can reduce the production cost of magnet while improving anti-demagnetization performance.
It will be appreciated to those of skill in the art that in motor operation course, the Posterior pole position of motor upper magnet due to
It is influenced by armature-reaction, demagnetization phenomenon easily occurs.Therefore, the stator and/or rotor of magnet applications of the invention to motor
When upper, the secondary magnet of high-coercive force can effectively cancel out influence of the armature to magnet, move back to be effectively prevented from magnet
Magnetic phenomenon.Simultaneously compared with the monolith magnet steel in the prior art with high-coercive force, reduce the dosage of rare earth material, saves
Production cost.
Detailed description of the invention
The preferred embodiment of the present invention described with reference to the accompanying drawings and in conjunction with motor, in attached drawing:
Fig. 1 is the structural schematic diagram of magnet in the first embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the magnet in the second embodiment of the present invention.
Reference signs list:
1, main magnet；2, the first secondary magnet；3, the second secondary magnet.
Specific embodiment
It will be apparent to a skilled person that this section embodiment is used only for explaining technical principle of the invention,
It is not intended to limit protection scope of the present invention.For example, magnet of the invention can be, magnet, magnet steel, magnetite etc. are any to be had
Magnetic component, those skilled in the art, which can according to need, makes adjustment to it, to adapt to specific application, adjustment
Technical solution afterwards will fall into protection scope of the present invention.
It should be noted that in the description of the present invention, term " center ", "upper", "lower", "left", "right", "vertical",
"horizontal", "inner", "outside" etc. indicate that the term of direction or positional relationship is direction based on the figure or positional relationship, this is only
It is merely for convenience of describing, rather than indication or suggestion described device or element must have a particular orientation, with specific side
Position construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second ", " third " are only used for
Purpose is described, relative importance is not understood to indicate or imply.
As shown in Figure 1, in the first embodiment of the present invention, magnet includes main magnet 1 and the first secondary magnet 2.Main magnet 1
And/or first secondary magnet 2 be preferably slab structure, also, the volume of the first secondary magnet 2 is less than the volume of main magnet 1.Except this
Except, those skilled in the art also can according to need, and main magnet 1 and/or the first secondary magnet 2 is arranged to any other feasible
Structure, such as laminated structure, column structure, strip structure, block structure etc..
Although being not specifically shown in figure, main magnet 1 includes the first magnetic pole and the second magnetic pole.First magnetic pole and second
One is the pole N in magnetic pole.The other is the pole S.
As shown in Figure 1, the first secondary magnet 2 is arranged on the first magnetic pole.Preferably, main magnet 1 and the first secondary magnet 2 use
The mode being fixedly connected is set together.It is highly preferred that (being also epoxy by epoxy glue between main magnet 1 and the first secondary magnet 2
Resin glue) it is bonded together.Alternatively, those skilled in the art also can according to need, it will using any other feasible viscose
Main magnet 1 and the first secondary magnet 2 are bonded together.For example, acrylic acid structure glue, ethylacrylic acid ester gum stick, metal structure
Glue etc..In addition, those skilled in the art also can according to need, using any other feasible connection type by 1 He of main magnet
First secondary magnet 2 is fixedly connected together.For example, welding, welding, riveting etc..
Although not showing that in figure, in main magnet 1 and the first secondary magnet 2, main magnet 1 has low-coercivity
Permanent magnetic steel, the first secondary magnet 2 is the permanent magnetic steel with high-coercive force.Wherein, main magnet 1 is using routine in the prior art
Permanent-magnet alloy is made.First secondary magnet 2 is made using the permanent-magnet alloy with rare earth element.Wherein, the rare earth material packet
Include terbium (Tb) and/or dysprosium (Dy).Can be improved the first secondary magnet 2 it is coercitive under the premise of, terbium (Tb) and dysprosium (Dy) can also
To be substituted by any other feasible rare earth element, such as neodymium (Nd).Due to the production work of the permanent-magnet alloy with rare earth element
Skill is technology well-known to those skilled in the art, so no longer doing excessive explanation herein.
In addition, those skilled in the art also can according to need, main magnet 1 is made using any other feasible material
And/or first secondary magnet 2, such as magnet, magnetite, magnetic polymer etc..
Secondary as the present embodiment selects embodiment, and main magnet 1 and the first secondary magnet 2 can also use integrally formed side
Formula is made.It will be appreciated to those of skill in the art that when main magnet 1 and the first secondary magnet 2 are made into integration, main magnet 1
With the first secondary magnet 2 either two structures independent of each other, are also possible to a complete structure.For example, working as main magnet 1
After being made into integration with the first secondary magnet 2, the first secondary magnet 2 becomes a part of main magnet 1 or main magnet 1 becomes
A part of first secondary magnet 2.
Manufacture craft of the magnet when main magnet 1 and the first secondary magnet 2 are made into integration is illustrated below:
First using identical permanent-magnet alloy by magnet cast or forging molding, then by diffusion technique make terbium (Tb) and/
Or dysprosium (Dy) penetrates into the inside of two pole parts of magnet, or makes terbium (Tb) and/or dysprosium (Dy) shape by the technique of coating
At on the surface of two pole parts of magnet.It is added to the magnet of terbium (Tb) and/or dysprosium (Dy), is therefore formed 1 He of main magnet
First secondary magnet 2.
As shown in Fig. 2, in the second embodiment of the present invention, unlike the embodiments above, the second magnetic of main magnet 1
The second secondary magnet 3 is provided on extremely.Preferably, the second secondary magnet 3 is identical as making material used by the first secondary magnet 2, ruler
Very little identical, structure is also identical.Alternatively, those skilled in the art also can according to need, it is greater than in the coercivity for guaranteeing the second secondary magnet 3
Under the premise of main magnet 1, making material, size and the structure of the second secondary magnet 3 are made into appropriate adjustment.
Although not showing that in figure, the present invention also provides a kind of motor, which mainly includes stator and rotor.
Wherein, multiple magnets are provided on stator, which is the magnet in above-mentioned first embodiment or above-mentioned second embodiment.Rotor
On be also equipped with multiple magnets, which is the magnet in above-mentioned first embodiment or above-mentioned second embodiment.Due in stator
It is technological means well-known to those skilled in the art with the technological means of magnet is arranged on rotor, so no longer do excessive herein
Explanation.
It should be noted that the magnet on stator and/or rotor is first real if motor is the motor of single direction rotation
Apply the magnet in example.If motor is the motor of bidirectional rotation, the magnet on stator and/or rotor is in second embodiment
Magnet.
In conclusion the present invention is by being arranged high-coercive force on one or two magnetic pole of the main magnet 1 of low-coercivity
Secondary magnet (2,3), not only increase the coercivity (improving the anti-demagnetization performance of magnet) of magnet, and and the prior art
In all over the magnet with high-coercive force compare and reduce the usage amount of rare earth element, reduce production cost.Work as the present invention
Magnet applications to the stator and/or rotor of motor on when, the secondary magnet (2,3) of high-coercive force can effectively cancel out armature pair
The influence of the Posterior pole of magnet, so that being effectively prevented from magnet demagnetization phenomenon occurs.
Wherein, the Posterior pole of motor upper magnet refers to the magnetic pole that the magnet on stator is directed toward in rotor rotation,
Magnet on rotor lags behind a magnetic pole of main magnet 1 when the rotor rotates.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of magnet, which is characterized in that the magnet includes main magnet and secondary magnet,
The main magnet includes the first magnetic pole and the second magnetic pole, at least one of first magnetic pole and second magnetic pole
It is provided with the secondary magnet,
The coercivity of the main magnet is less than the coercivity of the secondary magnet.
2. magnet according to claim 1, which is characterized in that the main magnet is fixedly connected with the secondary magnet or one
It is made.
3. magnet according to claim 2, which is characterized in that the main magnet and the secondary magnet are bonded by epoxy glue
To together.
4. magnet according to claim 2, which is characterized in that the main magnet is made of permanent-magnet alloy；And/or
The pair magnet uses the permanent-magnet alloy with rare earth element to be made.
5. magnet according to claim 4, which is characterized in that the rare earth element penetrates into the pair by diffusion technique
On magnet.
6. magnet according to claim 5, which is characterized in that the rare earth element includes terbium and/or dysprosium.
7. magnet according to any one of claim 1 to 6, which is characterized in that the volume of the pair magnet is less than described
The volume of main magnet.
8. a kind of rotor of motor, which is characterized in that be provided on the rotor described in multiple any one of claims 1 to 7
Magnet.
9. a kind of stator of motor, which is characterized in that be provided on the stator described in multiple any one of claims 1 to 7
Magnet.
10. a kind of motor, which is characterized in that the motor includes described in rotor according to any one of claims 8 and/or claim 9
Stator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018214239168 | 2018-08-31 | ||
| CN201821423916 | 2018-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109904940A true CN109904940A (en) | 2019-06-18 |
Family
ID=66944281
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910082481.8A Pending CN109904940A (en) | 2018-08-31 | 2019-01-28 | Motor and its stator, rotor and magnet |
| CN201920145200.4U Active CN209526572U (en) | 2018-08-31 | 2019-01-28 | Motor and its stator, rotor and magnet |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920145200.4U Active CN209526572U (en) | 2018-08-31 | 2019-01-28 | Motor and its stator, rotor and magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109904940A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904940A (en) * | 2018-08-31 | 2019-06-18 | 蔚来汽车有限公司 | Motor and its stator, rotor and magnet |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148566A (en) * | 1981-03-09 | 1982-09-13 | Hitachi Metals Ltd | Composite permanent magnet for magnetic field |
| JPH08340651A (en) * | 1995-06-12 | 1996-12-24 | Toshiba Corp | Permanent magnet, and permanent magnet rotating machine |
| JP4211393B2 (en) * | 2002-12-27 | 2009-01-21 | 株式会社ジェイテクト | Rotor and motor |
| CN101641854A (en) * | 2007-03-27 | 2010-02-03 | 日立金属株式会社 | Permanent magnet type rotator and process for producing the same |
| CN102611216A (en) * | 2011-01-19 | 2012-07-25 | 株式会社安川电机 | Mixed type excitation permanent magnet, rotor for rotating electric machine using same and generator |
| CN103779988A (en) * | 2012-10-18 | 2014-05-07 | 罗伯特·博世有限公司 | Cylindrical rotor for permanent magnet-excited electric machine |
| CN209526572U (en) * | 2018-08-31 | 2019-10-22 | 蔚来汽车有限公司 | Motor and its stator, rotor and magnet |
-
2019
- 2019-01-28 CN CN201910082481.8A patent/CN109904940A/en active Pending
- 2019-01-28 CN CN201920145200.4U patent/CN209526572U/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148566A (en) * | 1981-03-09 | 1982-09-13 | Hitachi Metals Ltd | Composite permanent magnet for magnetic field |
| JPH08340651A (en) * | 1995-06-12 | 1996-12-24 | Toshiba Corp | Permanent magnet, and permanent magnet rotating machine |
| JP4211393B2 (en) * | 2002-12-27 | 2009-01-21 | 株式会社ジェイテクト | Rotor and motor |
| CN101641854A (en) * | 2007-03-27 | 2010-02-03 | 日立金属株式会社 | Permanent magnet type rotator and process for producing the same |
| CN102611216A (en) * | 2011-01-19 | 2012-07-25 | 株式会社安川电机 | Mixed type excitation permanent magnet, rotor for rotating electric machine using same and generator |
| CN103779988A (en) * | 2012-10-18 | 2014-05-07 | 罗伯特·博世有限公司 | Cylindrical rotor for permanent magnet-excited electric machine |
| CN209526572U (en) * | 2018-08-31 | 2019-10-22 | 蔚来汽车有限公司 | Motor and its stator, rotor and magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN209526572U (en) | 2019-10-22 |
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Legal Events
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200904 Address after: Susong Road West and Shenzhen Road North, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Weilai (Anhui) Holding Co., Ltd Address before: 30 Floor of Yihe Building, No. 1 Kangle Plaza, Central, Hong Kong, China Applicant before: NIO NEXTEV Ltd. |
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| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
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| RJ01 | Rejection of invention patent application after publication |