CN111564917A - Motor rotor structure based on metal 3D printing technology - Google Patents
Motor rotor structure based on metal 3D printing technology Download PDFInfo
- Publication number
- CN111564917A CN111564917A CN202010511097.8A CN202010511097A CN111564917A CN 111564917 A CN111564917 A CN 111564917A CN 202010511097 A CN202010511097 A CN 202010511097A CN 111564917 A CN111564917 A CN 111564917A
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- CN
- China
- Prior art keywords
- permanent magnet
- rotor
- magnetic
- motor
- metal
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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.)
- Pending
Links
- 238000010146 3D printing Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 title claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
Images
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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a motor rotor structure based on a metal 3D printing technology, which comprises a rotor core, a shaft hole and permanent magnet grooves, wherein the permanent magnet grooves penetrate through the upper end face and the lower end face of the rotor core; the side part of the rotor core is provided with a plurality of permanent magnet magnetic bridges, the permanent magnet magnetic bridges are positioned at two sides of the permanent magnet grooves, air magnetic barriers are arranged at the permanent magnet magnetic bridges, and the air magnetic barriers are communicated with the permanent magnet grooves. The invention takes air as magnetic barrier, effectively reduces the magnetic leakage of the motor and improves the performance of the motor on the premise of ensuring the strength of the rotor.
Description
Technical Field
The invention relates to the field of motor rotor structures, in particular to a motor rotor structure based on a metal 3D printing technology.
Background
With the rapid development of national economy, higher requirements are also put forward on the performance of the motor. The motor is required to have high efficiency and good performance, and the magnetic leakage of the motor can reduce the utilization rate of permanent magnet materials and the output torque of the motor. When the motor rotates, the magnetic flux linked with each phase winding can also be caused to generate periodic fluctuation, so that the back electromotive force induced by the motor winding is fluctuated, ripple torque is generated, the control precision of a system is influenced, meanwhile, the performance of the motor is directly influenced, and the efficiency of the motor is reduced.
The rotor iron core of the motor is one of main components of the motor, and the rotor iron core of the traditional motor is formed by laminating silicon steel sheets, so that the iron core sheets have important influence on the performance of the motor. The rotor punching sheet is required to have higher dimensional accuracy and form and position accuracy, and the die for punching the rotor punching sheet has higher accuracy requirement, so that the difficulty of a processing procedure is increased. In addition, the mold is not highly versatile and expensive, which increases the manufacturing cost. And the rotor core manufactured by the laminating method has the same axial section, inflexible structure and certain limitation on the performance of the motor.
The metal 3D printing technology adopts high-power optical fiber laser as energy for melting and forming, can realize printing of various metal materials, has high forming freedom degree, is easy to realize rapid forming of complex structures, greatly reduces the complexity of iron core processing procedures, increases the utilization rate of materials and shortens the production period. Therefore, the metal 3D printing technology is applied to the field of motor iron core manufacturing, the motor iron core can be flexibly printed, different structures are realized to improve the performance of the motor, the working efficiency can be effectively improved, and materials are saved.
Disclosure of Invention
The invention aims to solve the problem of magnetic flux leakage of a motor rotor in the prior art, and provides a motor rotor structure based on a metal 3D printing technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a motor rotor structure based on a metal 3D printing technology comprises a rotor core, wherein the rotor core is of a cylindrical structure, and a shaft hole is formed in the center of the rotor core along the axial direction; a plurality of permanent magnet slots are equidistantly arranged at the periphery of the rotor core close to the edge, and penetrate through the upper end face and the lower end face of the rotor core; the rotor comprises a rotor core, a plurality of permanent magnet bridges, strip-shaped groove-structured air magnetic barriers, a plurality of permanent magnet grooves, an air magnetic barrier, an iron core connecting part and a rotor core connecting part, wherein the permanent magnet bridges are arranged on the side part of the rotor core, one permanent magnet groove corresponds to two air magnetic barriers, the air magnetic barriers are positioned on two sides of the permanent magnet groove and communicated with the permanent magnet groove, and the rotor core parts, close to the permanent magnet groove, of the upper part and the lower part of each permanent.
As a further preferred solution, said permanent magnet slots are perpendicular to the diameter of the rotor core end face circle.
As a further preferable mode, the air magnetic barrier is parallel to the axial direction of the rotor core.
As a further preferred solution, at least two permanent magnet slots are arranged equidistantly around the edge of the rotor core.
In a further preferred embodiment, the distance between the air magnetic barrier and the end face of the rotor core is 0.1mm or more.
Has the advantages that:
1. the motor rotor core is printed by adopting a metal three-dimensional printing technology, the structure is flexible, the production process is simple, the production period is short, and the utilization rate of materials is improved.
2. The invention takes air as magnetic barrier, and can effectively reduce the magnetic leakage of the motor and improve the performance of the motor on the premise of ensuring the strength of the rotor.
Drawings
FIG. 1 is a schematic view of a rotor core structure for an electric machine according to the present invention;
FIG. 2 is a radial cross-sectional view of a rotor core structure of an electric machine in accordance with the present invention;
FIG. 3 is a schematic diagram of the distribution of magnetic lines of force of a rotor without magnetic barriers;
FIG. 4 is a schematic view of the magnetic flux distribution of the rotor of the present invention;
in the figure: 1. the rotor comprises a rotor iron core, 2, permanent magnet grooves, 3, shaft holes, 11, air magnetic barriers, 12, permanent magnet magnetic bridges and 13 and iron core connection parts.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying drawings and detailed description of the invention. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the reader will be more fully aware of the disclosure of the present invention.
As shown in fig. 1 and 2, a motor rotor structure based on a metal 3D printing technology, the motor of which is built-in, includes a rotor core 1, the rotor core 1 is a cylindrical structure, and a shaft hole 3 is axially formed in the center of the rotor core 1; a plurality of permanent magnet grooves 2 are equidistantly arranged at the position, close to the edge, of the rotor core 1, the permanent magnet grooves 2 penetrate through the upper end face and the lower end face of the rotor core 1, and the permanent magnet grooves are perpendicular to the diameter of the circle of the end face of the rotor core.
There are a plurality of permanent magnet magnetic bridges 12 at the lateral part of rotor core 1, permanent magnet magnetic bridge department 12 sets up the air magnetic barrier 11 of bar groove structure, a permanent magnet groove 2 corresponds two air magnetic barriers 11, air magnetic barrier 11 is located the both sides position in permanent magnet groove 2, air magnetic barrier 11 and permanent magnet groove 2 intercommunication, permanent magnet bridge 12 upper portion and lower part are close to rotor core 1 part in permanent magnet groove 2 and are iron core junction 13, the height h of iron core junction 13 is under the prerequisite of guaranteeing mechanical strength, accomplish littleer, the motor magnetic leakage is less, generally more than or equal to 0.1 mm.
Air magnetic barriers 11 are arranged in the permanent magnet magnetic bridges 12, and the air magnetic barriers 11 can be rectangular, trapezoidal and the like.
As shown in figures 3 and 4, the schematic diagram of the distribution of magnetic force lines of a rotor without a magnetic barrier and the schematic diagram of the distribution of magnetic force lines of a rotor of the invention are not arranged, the invention can increase the magnetic resistance of the magnetic barrier 13 at the magnetic bridge of the permanent magnet by arranging the air magnetic barriers 11 at the magnetic bridge of the permanent magnet 12 and outside the connection position 13 of the iron core, prevent the magnetic force lines from directly entering the S pole of another permanent magnet from the N pole of the permanent magnet, and promote the magnetic force lines to enter the air gap fromReaches the inside of the stator and reduces the 12 magnetic leakage at the permanent magnet magnetic bridge
And further improve the air gap flux density of the motor and improve the motor efficiency.
Further, the number of the motor permanent magnet slots 2 is 6.
Further, the air magnetic barrier 11 is a rectangular parallelepiped.
When the magnetic barrier is used specifically, the magnetic barrier is limited to a built-in motor and is not suitable for a surface-mounted motor, the number, the shape and the position of the magnetic barriers are not specified clearly, and the magnetic barriers are required to be determined according to the application requirements of the motor.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a motor rotor structure based on metal 3D printing technique which characterized in that: the rotor comprises a rotor iron core (1), wherein the rotor iron core (1) is of a cylindrical structure, and a shaft hole (3) is formed in the center of the rotor iron core (1) along the axial direction; a plurality of permanent magnet grooves (2) are equidistantly arranged at the position, close to the edge, of the rotor iron core (1) in a circle, and the permanent magnet grooves (2) penetrate through the upper end face and the lower end face of the rotor iron core (1); the lateral part of rotor core (1) has a plurality of permanent magnet magnetic bridges (12), and permanent magnet magnetic bridge (12) department sets up air magnetic barrier (11) of bar groove structure, and one permanent magnet groove (2) corresponds two air magnetic barriers (11), and air magnetic barrier (11) are located the both sides position of permanent magnet groove (2), and air magnetic barrier (11) and permanent magnet groove (2) intercommunication, rotor core (1) part that permanent magnet magnetic bridge (12) upper portion and lower part are close to permanent magnet groove (2) is iron core junction (13).
2. The motor rotor structure based on metal 3D printing technology of claim 1, characterized in that: the permanent magnet slots (2) are perpendicular to the diameter of the end face circle of the rotor core (1).
3. The motor rotor structure based on metal 3D printing technology of claim 1, characterized in that: the air magnetic barrier (11) is parallel to the axial direction of the rotor core (1).
4. The motor rotor structure based on metal 3D printing technology of claim 1, characterized in that: at least two permanent magnet slots (2) are equidistantly arranged on the periphery of the rotor core (1).
5. The motor rotor structure based on metal 3D printing technology of claim 1, characterized in that: the distance between the air magnetic barrier (11) and the end face of the rotor core (1) is more than or equal to 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511097.8A CN111564917A (en) | 2020-06-08 | 2020-06-08 | Motor rotor structure based on metal 3D printing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511097.8A CN111564917A (en) | 2020-06-08 | 2020-06-08 | Motor rotor structure based on metal 3D printing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111564917A true CN111564917A (en) | 2020-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010511097.8A Pending CN111564917A (en) | 2020-06-08 | 2020-06-08 | Motor rotor structure based on metal 3D printing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564917A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015192590A (en) * | 2014-03-31 | 2015-11-02 | ダイキン工業株式会社 | rotor |
| CN110462984A (en) * | 2017-03-30 | 2019-11-15 | 日本电产株式会社 | Rotor and motor |
| CN111030340A (en) * | 2019-12-31 | 2020-04-17 | 南京师范大学 | Motor rotor structure based on metal three-dimensional printing, motor rotor, motor and method |
| CN111245114A (en) * | 2020-01-20 | 2020-06-05 | 南京师范大学 | Motor iron core based on metal 3D printing technology and manufacturing method thereof |
-
2020
- 2020-06-08 CN CN202010511097.8A patent/CN111564917A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015192590A (en) * | 2014-03-31 | 2015-11-02 | ダイキン工業株式会社 | rotor |
| CN110462984A (en) * | 2017-03-30 | 2019-11-15 | 日本电产株式会社 | Rotor and motor |
| CN111030340A (en) * | 2019-12-31 | 2020-04-17 | 南京师范大学 | Motor rotor structure based on metal three-dimensional printing, motor rotor, motor and method |
| CN111245114A (en) * | 2020-01-20 | 2020-06-05 | 南京师范大学 | Motor iron core based on metal 3D printing technology and manufacturing method thereof |
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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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200821 |