CN220122661U - Permanent magnet synchronous motor rotor structure - Google Patents
Permanent magnet synchronous motor rotor structure Download PDFInfo
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- CN220122661U CN220122661U CN202321468693.8U CN202321468693U CN220122661U CN 220122661 U CN220122661 U CN 220122661U CN 202321468693 U CN202321468693 U CN 202321468693U CN 220122661 U CN220122661 U CN 220122661U
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- magnetic pole
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model provides a rotor structure of a permanent magnet synchronous motor, and relates to the technical field of motors. The device comprises: the rotor yoke part, the permanent magnet and the rotor magnetic pole are connected through a fastening screw; the rotor yoke comprises a yoke main body, screw holes, shaft holes, steps for accommodating the screw holes, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface; the rotor magnetic pole comprises a magnetic pole, a light hole, a rotor surface, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface; the screw hole is matched with the unthreaded hole and is used for positioning and fastening the magnetic pole of the rotor; the rotor yoke part is matched with the permanent magnet transverse installation surface of the rotor magnetic pole, and the permanent magnet is compressed in the transverse direction; the rotor yoke is matched with the permanent magnet longitudinal limiting surface of the rotor magnetic pole to longitudinally limit the permanent magnet. No gap exists between the permanent magnet and the rotor core, so that the utilization rate of the permanent magnet is improved; the rotor yoke part and the magnetic poles are connected through bolts, so that the magnetic isolation effect is good; the rotor magnetic pole can be disassembled, so that the motor permanent magnet can be conveniently disassembled and assembled.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a permanent magnet synchronous motor rotor structure.
Background
The motor is a power device with wide range, is widely applied to equipment and scenes such as industry, agriculture, ships, household appliances and the like, and the permanent magnet synchronous motor is a high-performance motor, has the advantages of high efficiency, high power factor and high power density, is widely applied to occasions with higher requirements on motor volume, efficiency and weight, and is an important means for energy conservation and emission reduction because more and more permanent magnet synchronous motors begin to replace some traditional three-phase asynchronous motors in the occasions such as wind power, traction machines and electric automobiles at present.
The permanent magnet motor has various structures, wherein the embedded permanent magnet motor has the widest application, and the embedded permanent magnet synchronous motor with the V-shaped arrangement mode is favored by the market in terms of higher rotor space utilization rate and better rotor magnetic field waveform. Although the V-shaped arrangement of embedded permanent magnets has many advantages, the following problems are also encountered: the permanent magnet is in an insertion installation mode, so that an installation gap of 0.2-0.3 mm is formed between the permanent magnet and the rotor core, the magnetic resistance of a magnetic circuit of the permanent magnet can be increased, and the utilization rate of the permanent magnet is reduced; in order to ensure the strength of the motor rotor, the rotor magnetic isolation bridge has larger thickness and serious magnetic leakage; the permanent magnet is installed in a plug-in mode, so that the permanent magnet is inconvenient to detach.
Accordingly, there is a need to provide a permanent magnet synchronous motor rotor structure that solves at least one of the above problems.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a rotor structure of a permanent magnet synchronous motor, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a rotor structure of a permanent magnet synchronous motor, which comprises: the permanent magnet is arranged between the rotor yoke and the rotor magnetic pole, and the rotor yoke is connected with the rotor magnetic pole through a fastening screw;
the rotor yoke comprises a yoke main body, screw holes, shaft holes, steps for accommodating the screw holes, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface;
the rotor magnetic pole comprises a magnetic pole, a light hole, a rotor surface, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface;
screw holes of the rotor yoke are matched with the unthreaded holes of the rotor magnetic poles and are used for positioning and fastening the rotor magnetic poles;
the permanent magnet transverse installation surface of the rotor yoke part is matched with the permanent magnet transverse installation surface of the rotor magnetic pole and is used for transversely compressing the permanent magnet;
the permanent magnet longitudinal limiting surface of the rotor yoke is matched with the permanent magnet longitudinal limiting surface of the rotor magnetic pole and used for limiting the permanent magnet longitudinally.
Optionally, the rotor yoke is machined from magnetically permeable material.
Optionally, the rotor poles are machined from magnetically permeable material.
Optionally, the nominal dimensions of the thickness of the rotor yoke, the thickness of the rotor poles and the thickness of the permanent magnets are the same.
Optionally, the rotor structure is an axial segmented split structure.
Optionally, each section of rotor yoke in the axial sectional split structure is uniformly distributed with 1 to 3 screw holes and light holes along the axial direction.
The beneficial effects of the utility model include:
the permanent magnet synchronous motor rotor structure comprises a rotor yoke, permanent magnets and rotor magnetic poles, wherein the permanent magnets are arranged between the rotor yoke and the rotor magnetic poles, and the rotor yoke is connected with the rotor magnetic poles through screws; the rotor yoke comprises a yoke main body, screw holes, shaft holes, steps for accommodating the screw holes, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface; the rotor magnetic pole comprises a magnetic pole, a light hole, a rotor surface, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface; screw holes of the rotor yoke are matched with the unthreaded holes of the rotor magnetic poles and are used for positioning and fastening the rotor magnetic poles; the permanent magnet transverse installation surface of the rotor yoke part is matched with the permanent magnet transverse installation surface of the rotor magnetic pole and is used for transversely compressing the permanent magnet; the permanent magnet longitudinal limiting surface of the rotor yoke is matched with the permanent magnet longitudinal limiting surface of the rotor magnetic pole and used for limiting the permanent magnet longitudinally. No gap exists between the permanent magnet and the rotor core, so that the utilization rate of the permanent magnet is improved; the rotor yoke part and the rotor magnetic poles are connected through the fastening bolts, so that the design of a magnetism isolating bridge is eliminated, and the magnetism isolating effect is good; the rotor magnetic pole can be detached, so that the motor permanent magnet can be conveniently disassembled, maintained and installed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of a rotor structure of a permanent magnet motor with a V-shaped arrangement of embedded permanent magnets in the prior art;
fig. 2 shows a schematic structural view of a rotor yoke according to an embodiment of the present utility model;
fig. 3 shows a schematic structural diagram of a rotor magnetic pole according to an embodiment of the present utility model;
fig. 4 shows a schematic diagram of a rotor structure of a permanent magnet synchronous motor according to an embodiment of the present utility model.
Reference numerals: a1-a rotor core; a2-permanent magnet slots; a3-permanent magnet; a4-shaft hole; a5-a circumferential magnetism isolating bridge; a6-radial magnetism isolating bridge; a7-gaps between the permanent magnets and the rotor core; b1-a yoke body; b2-screw holes; b3-shaft hole; b4-a step for accommodating the screw hole; b5-a permanent magnet transverse mounting surface; b6-a longitudinal limit surface of the permanent magnet; c1-magnetic pole; c2-light holes; c3-rotor surface; c4-permanent magnet transverse mounting surface; c5-a longitudinal limit surface of the permanent magnet; d1-a rotor yoke; d2-permanent magnet; d3—rotor poles; and D4-fastening a screw.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The permanent magnet motor has various structures, wherein the embedded permanent magnet motor has the widest application, and the embedded permanent magnet synchronous motor with the V-shaped arrangement mode is favored by the market in terms of higher rotor space utilization rate and better rotor magnetic field waveform. The permanent magnets under the same pole of the V-shaped arrangement of the embedded permanent magnets are arranged in a V-shaped manner, fig. 1 shows a schematic diagram of a rotor structure of a permanent magnet motor with the V-shaped arrangement of the embedded permanent magnets in the prior art, and as shown in fig. 1, the structure comprises: rotor core A1, permanent magnet groove A2, permanent magnet A3, shaft hole A4, to magnetism isolating bridge A5, radial magnetism isolating bridge A6, clearance A7 between permanent magnet and rotor core. The V-shaped arrangement of the embedded permanent magnets can be expanded into double V-shaped, multi-V-shaped and the like, and the application is wider. Although the V-shaped arrangement of embedded permanent magnets has many advantages, the following problems are also encountered: the permanent magnet is in an insertion installation mode, so that an installation gap of 0.2-0.3 mm is formed between the permanent magnet and the rotor core, the magnetic resistance of a magnetic circuit of the permanent magnet can be increased, and the utilization rate of the permanent magnet is reduced; in order to ensure the strength of the motor rotor, the rotor magnetic isolation bridge has larger thickness and serious magnetic leakage; the permanent magnet is installed in a plug-in mode, so that the permanent magnet is inconvenient to detach. Accordingly, there is a need to provide a permanent magnet synchronous motor rotor structure that solves at least one of the above problems.
The utility model provides an adjustable rotor structure, which is characterized in that a rotor iron core is divided into a rotor yoke part and a rotor magnetic pole, and the rotor is assembled by the rotor yoke part and the rotor magnetic pole.
Fig. 2 shows a schematic structural view of a rotor yoke according to an embodiment of the present utility model; fig. 3 shows a schematic structural diagram of a rotor magnetic pole according to an embodiment of the present utility model; fig. 4 shows a schematic diagram of a rotor structure of a permanent magnet synchronous motor according to an embodiment of the present utility model. The present utility model will be described in detail with reference to fig. 2 to 4.
In the utility model, the rotor of the permanent magnet synchronous motor synchronously rotates along with the main magnetic field, the main magnetic flux frequency in the rotor is 0, and the eddy current in the rotor is less, so that a solid rotor structure is adopted to replace a silicon steel sheet laminated structure.
As shown in fig. 4, the rotor structure of the permanent magnet synchronous motor provided by the utility model comprises: the rotor yoke D1, the permanent magnet D2, and the rotor magnetic pole D3, the permanent magnet D2 being installed between the rotor yoke D1 and the rotor magnetic pole D3, the rotor yoke D1 and the rotor magnetic pole D3 being connected by the fastening screw D4.
As shown in fig. 2, the rotor yoke D1 includes a yoke body B1, a screw hole B2, a shaft hole B3, a step B4 accommodating the screw hole, a permanent magnet lateral mounting surface B5, and a permanent magnet longitudinal limit surface B6.
As shown in fig. 3, the rotor pole D3 includes a pole C1, a light hole C2, a rotor surface C3, a permanent magnet lateral mounting surface C4, and a permanent magnet longitudinal limit surface C5.
The screw hole B2 of the rotor yoke D1 and the light hole C2 of the rotor pole D3 cooperate for positioning and fastening the rotor pole D3.
The permanent magnet transverse mounting surface B5 of the rotor yoke D1 and the permanent magnet transverse mounting surface C4 of the rotor magnetic pole D3 cooperate to compress the permanent magnet D2 in the transverse direction, so that no gap is left between the rotor yoke D1, the permanent magnet D2 and the rotor magnetic pole D3, and the utilization rate of the permanent magnet D2 is improved.
The permanent magnet longitudinal limit surface B6 of the rotor yoke D1 and the permanent magnet longitudinal limit surface C5 of the rotor pole D3 cooperate to limit the permanent magnet D2 in the longitudinal direction, thereby avoiding movement of the permanent magnet D2.
In the structure, the rotor yoke part D1 and the rotor magnetic pole D3 are connected through the fastening screw rod D4, so that an axial and radial magnetic isolation bridge structure is avoided, and magnetic leakage caused by the magnetic isolation bridge is reduced; when the permanent magnet D2 is installed and disassembled, the permanent magnet D2 can be realized by taking down the fastening bolt D4 and the rotor magnetic pole D3, and the operation is convenient.
Optionally, the rotor yoke D1 is machined from magnetically conductive material. Optionally, the rotor poles are machined from magnetically permeable material. Alternatively, the nominal dimensions of the thickness of the rotor yoke D1, the thickness of the rotor pole D3, and the thickness of the permanent magnet D2 are the same. Optionally, the rotor structure is an axial segmented split structure to facilitate rotor segmented skewed pole design. Optionally, each section of rotor yoke in the axial sectional split structure is uniformly distributed with 1 to 3 screw holes and light holes along the axial direction.
In summary, in the rotor structure of the permanent magnet synchronous motor provided by the utility model, no gap exists between the permanent magnet and the rotor core, so that the utilization rate of the permanent magnet is improved; the rotor yoke part and the rotor magnetic poles are connected through the fastening bolts, so that the design of a magnetism isolating bridge is eliminated, and the magnetism isolating effect is good; the rotor magnetic pole can be detached, so that the motor permanent magnet can be conveniently disassembled, maintained and installed.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. A rotor structure of a permanent magnet synchronous motor, the rotor structure comprising: the permanent magnet is arranged between the rotor yoke and the rotor magnetic pole, and the rotor yoke and the rotor magnetic pole are connected through a fastening screw;
the rotor yoke comprises a yoke main body, screw holes, shaft holes, steps for accommodating the screw holes, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface;
the rotor magnetic pole comprises a magnetic pole, a light hole, a rotor surface, a permanent magnet transverse mounting surface and a permanent magnet longitudinal limiting surface;
the screw holes of the rotor yoke are matched with the unthreaded holes of the rotor magnetic poles and are used for positioning and fastening the rotor magnetic poles;
the permanent magnet transverse installation surface of the rotor yoke part is matched with the permanent magnet transverse installation surface of the rotor magnetic pole and is used for transversely compressing the permanent magnet;
the permanent magnet longitudinal limiting surface of the rotor yoke is matched with the permanent magnet longitudinal limiting surface of the rotor magnetic pole and used for limiting the permanent magnet longitudinally.
2. The permanent magnet synchronous motor rotor structure according to claim 1, wherein the rotor yoke is machined from magnetically permeable material.
3. The rotor structure of claim 1, wherein the rotor poles are machined from magnetically permeable material.
4. The permanent magnet synchronous motor rotor structure according to claim 1, wherein the thickness of the rotor yoke, the thickness of the rotor poles, and the nominal size of the thickness of the permanent magnets are the same.
5. The permanent magnet synchronous motor rotor structure according to claim 4, wherein the rotor structure is an axially segmented split structure.
6. The rotor structure of claim 5, wherein each segment of the rotor yoke in the axially segmented split structure has 1 to 3 screw holes and optical holes uniformly distributed along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321468693.8U CN220122661U (en) | 2023-06-09 | 2023-06-09 | Permanent magnet synchronous motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321468693.8U CN220122661U (en) | 2023-06-09 | 2023-06-09 | Permanent magnet synchronous motor rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122661U true CN220122661U (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321468693.8U Active CN220122661U (en) | 2023-06-09 | 2023-06-09 | Permanent magnet synchronous motor rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122661U (en) |
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2023
- 2023-06-09 CN CN202321468693.8U patent/CN220122661U/en active Active
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