CN207304193U - A kind of by-pass shunt formula permanent magnet - Google Patents
A kind of by-pass shunt formula permanent magnet Download PDFInfo
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- CN207304193U CN207304193U CN201721073979.0U CN201721073979U CN207304193U CN 207304193 U CN207304193 U CN 207304193U CN 201721073979 U CN201721073979 U CN 201721073979U CN 207304193 U CN207304193 U CN 207304193U
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- coating
- permanent magnet
- pass shunt
- shunt formula
- phosphor bodies
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Abstract
It the utility model is related to a kind of by-pass shunt formula permanent magnet, the by-pass shunt formula permanent magnet includes permanent magnetism phosphor bodies drawn game portion coating, all apex angles of permanent magnetism phosphor bodies and endless all standing permanent magnet main body is completely covered in the part coating, and the part coating is containing nickel coating.Compared with prior art, the utility model has the advantages that to improve the anti-degaussing ability of permanent magnet, reduce the coercivity demand of permanent magnet and save cost.
Description
Technical field
New-energy automobile permanent magnet synchronous motor body design field is the utility model is related to, more particularly, to one kind bypass point
Streaming permanent magnet.
Background technology
Recently as the high speed development of new-energy automobile industry, sintered NdFeB permanent magnet synchronous motor is automobile-used driving electricity
The first choice of machine.Higher and higher with the power density of automobile drive motor, torque density is increasing, sintered Nd-Fe-B permanent magnet
It is higher there are temperature coefficient, cause permanent magnetism temperature in rotor seriously to raise, or even irreversible demagnetization phenomenon occur.
At present for improving the anti-demagnetization capability of permanent magnet mainly by improving permanent magnet coercive force, pass through the side of chemical preparation
Method increases permanent magnetism body thickness, increases thickness of coating or contains nickel coating using ambrose alloy, this undoubtedly both increases the cost of design of electrical motor.
Under high temperature, strong demagnetized field, the operating point of permanent magnet two side portions is lower compared with intermediate region, is more easy to generation irreversible demagnetization and shows
As.
Utility model content
The purpose of this utility model is to provide a kind of by-pass shunt formula permanent magnet regarding to the issue above.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of by-pass shunt formula permanent magnet, the by-pass shunt formula permanent magnet include permanent magnetism phosphor bodies drawn game portion coating, institute
State local coating and be completely covered all apex angles of permanent magnetism phosphor bodies and endless all standing permanent magnet main body, the part coating be containing
Nickel coating.
The thickness of the part coating is 5-20 μm.
The width of the part coating is less than permanent magnet body width.
The part coating includes First partial coating and the second local coating, the First partial coating and the second part
Coating distribution respectively realizes all apex angles of all apex angles in left side of permanent magnet and right side positioned at the left and right sides of permanent magnetism phosphor bodies
It is completely covered.
The size of the First partial coating and the second local coating is identical, and symmetrically divides along the central axes of permanent magnetism phosphor bodies
Cloth.
Compared with prior art, the utility model has the advantages that：
(1) by permanent magnetism phosphor bodies overlying lid part coating, optimization coating structure improves the anti-demagnetization capability of permanent magnet,
It is specific to contain nickel coating by the way that the part of all apex angles of permanent magnetism phosphor bodies is completely covered, it is used as magnetic conduction bypass, alleviates permanent magnet
The reverse demagnetized field of edge, improves the anti-demagnetization performance of motor permanent magnet, can reduce the coercivity of permanent magnet accordingly
Demand, decreases or even eliminates the use of heavy rare earth element.
(2) First partial coating and the second local coating are symmetrical along central axes, are conducive to plating process, permanent magnet can
Routine magnetizes without distinguishing positive and negative, and reduces torque pulsation to a certain extent.
(3) local thickness of coating is arranged to 5-20 μm, both can guarantee that the anti-demagnetization capability of motor permanent magnet, and can control
Make the material cost of plating.
Brief description of the drawings
Fig. 1 is the structure subdivision schematic diagram of by-pass shunt formula permanent magnet；
Fig. 2 is the structure subdivision schematic diagram of permanent magnetism phosphor bodies；
Fig. 3 is the structure subdivision schematic diagram of local coating；
Wherein, 1 is permanent magnetism phosphor bodies, and 2 be First partial coating, and 3 be the second local coating.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the utility model
Implemented premised on technical solution, give detailed embodiment and specific operating process, but the guarantor of the utility model
Shield scope is not limited to following embodiments.
This application provides a kind of by-pass shunt formula permanent magnet, as shown in Figure 1, including permanent magnetism phosphor bodies 1 (as shown in Figure 2)
With local coating (as shown in Figure 3), all apex angles of permanent magnetism phosphor bodies 1 and endless all standing permanent magnet is completely covered in local coating
Main body 1, local coating are containing nickel coating.
Embodiment 1
In the present embodiment, the thickness of local coating is 10 μm.The width of local coating is the 1/2 of 1 width of permanent magnetism phosphor bodies.
Local coating includes the local coating 3 of First partial coating 2 and second, and the local distribution of coating 3 of First partial coating 2 and second is located at
The left and right sides of permanent magnetism phosphor bodies 1, realizes all apex angles of all apex angles in left side of permanent magnet and right side be completely covered respectively.The
One local coating 2 is identical and symmetrical along the central axes of permanent magnetism phosphor bodies with the size of the second local coating 3.First partial
The width of coating 2 is the 1/4 of 1 width of permanent magnetism phosphor bodies.The width of second local coating 3 is the 1/4 of 1 width of permanent magnetism phosphor bodies.
Since the local coating 3 of First partial coating 2 and second is containing nickel coating, and nickel be permeability magnetic material, utilizes left and right innings
Portion is bypassed containing nickel coating as magnetic conduction, can be alleviated the reverse demagnetized field of permanent magnet edge, be improved the anti-of motor permanent magnet and move back
Magnetic energy power.It can reduce the coercivity demand of permanent magnet accordingly, decrease or even eliminate the use of heavy rare earth element.With overall electricity
The technology of nickel coating is different, it only needs edge to carry out nickel plating, and the material cost of plating is controlled.The structure permanent magnet was both
It can guarantee that the torque performance as overall coating, and the anti-demagnetization capability of permanent magnet can be improved, also reduce motor to a certain degree
Torque pulsation, therefore the anti-demagnetization technology of the method for bypass permanent magnet have the characteristics that distinctness high sexual valence.
Embodiment 2
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
Local thickness of coating in example is 5 μm.
Embodiment 3
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
Local thickness of coating in example is 20 μm.
Embodiment 4
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The width of First partial coating and the second local coating is the 1/3 of permanent magnet body width in example.
Embodiment 5
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The width of First partial coating and the second local coating is the 1/5 of permanent magnet body width in example.
Embodiment 6
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The thickness of First partial coating and the second local coating is 5 μm in example, and width is the 1/3 of permanent magnet body width.
Embodiment 7
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The thickness of First partial coating and the second local coating is 20 μm in example, and width is the 1/3 of permanent magnet body width.
Embodiment 8
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The thickness of First partial coating and the second local coating is 5 μm in example, and width is the 1/5 of permanent magnet body width.
Embodiment 9
By-pass shunt formula magnet structure in the present embodiment is with roughly the same in embodiment 1, and difference lies in this implementation
The thickness of First partial coating and the second local coating is 20 μm in example, and width is the 1/5 of permanent magnet body width.
Claims (5)
1. a kind of by-pass shunt formula permanent magnet, it is characterised in that the by-pass shunt formula permanent magnet includes permanent magnetism phosphor bodies drawn game
All apex angles of permanent magnetism phosphor bodies and endless all standing permanent magnet main body, the office is completely covered in portion's coating, the part coating
Portion's coating is containing nickel coating.
2. by-pass shunt formula permanent magnet according to claim 1, it is characterised in that the thickness of the part coating is 5-20
μm。
3. by-pass shunt formula permanent magnet according to claim 1, it is characterised in that the width of the part coating is less than forever
Magnetic body width.
4. by-pass shunt formula permanent magnet according to claim 1, it is characterised in that the part coating includes First partial
Coating and the second local coating, the First partial coating and the second local coating are located at the left and right two of permanent magnetism phosphor bodies respectively
Side, realizes all apex angles of all apex angles in left side of permanent magnet and right side be completely covered respectively.
5. by-pass shunt formula permanent magnet according to claim 4, it is characterised in that the First partial coating and second game
The size of portion's coating is identical, and symmetrical along the central axes of permanent magnetism phosphor bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721073979.0U CN207304193U (en) | 2017-08-25 | 2017-08-25 | A kind of by-pass shunt formula permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721073979.0U CN207304193U (en) | 2017-08-25 | 2017-08-25 | A kind of by-pass shunt formula permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304193U true CN207304193U (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721073979.0U Active CN207304193U (en) | 2017-08-25 | 2017-08-25 | A kind of by-pass shunt formula permanent magnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428414A (en) * | 2017-08-25 | 2019-03-05 | 上海电驱动股份有限公司 | A kind of by-pass shunt formula permanent magnet |
-
2017
- 2017-08-25 CN CN201721073979.0U patent/CN207304193U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428414A (en) * | 2017-08-25 | 2019-03-05 | 上海电驱动股份有限公司 | A kind of by-pass shunt formula permanent magnet |
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