CN219893040U - Motor rotor and synchronous reluctance motor - Google Patents
Motor rotor and synchronous reluctance motor Download PDFInfo
- Publication number
- CN219893040U CN219893040U CN202320699151.5U CN202320699151U CN219893040U CN 219893040 U CN219893040 U CN 219893040U CN 202320699151 U CN202320699151 U CN 202320699151U CN 219893040 U CN219893040 U CN 219893040U
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- rotor
- mounting grooves
- particles
- rotor core
- motor
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 230000004888 barrier function Effects 0.000 claims abstract description 26
- 239000006249 magnetic particle Substances 0.000 claims abstract description 23
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 19
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- PRQMIVBGRIUJHV-UHFFFAOYSA-N [N].[Fe].[Sm] Chemical compound [N].[Fe].[Sm] PRQMIVBGRIUJHV-UHFFFAOYSA-N 0.000 claims description 3
- 229910000828 alnico Inorganic materials 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Synchronous Machinery (AREA)
Abstract
The utility model discloses a motor rotor and a synchronous reluctance motor, wherein the motor rotor comprises a rotor core, the rotor core is provided with a plurality of magnetic barrier structures which are uniformly distributed along the circumferential direction of the rotor core, and the magnetic barrier structures comprise: at least three layers of mounting grooves are sequentially arranged along the radial direction of the rotor core, permanent magnetic particles are filled in the mounting grooves, and the permanent magnetic particles are fixed in the mounting grooves through an adhesive. The utility model can improve the motor performance and maximize the reluctance torque.
Description
Technical Field
The utility model relates to the field of motors, in particular to a motor rotor and a synchronous reluctance motor.
Background
In recent years, the synchronous reluctance motor (Synchronous Reluctance Machine, synRM) has the advantages of small moment of inertia, quick dynamic response, strong overload capacity, easy field weakening and speed expanding and the like, and is widely applied to various fields of high-quality variable speed transmission, wind power generation, aerospace and the like. The scholars at home and abroad have conducted intensive researches on the working principle, the body structural characteristics, the driving control technology, the electromagnetic performance analysis and the like of the synchronous reluctance motor.
Currently, the prior art has one of the following disadvantages:
the synchronous reluctance motor generally adopts a rotor with a salient pole structure, and the structure can increase the magnetic resistance of a rotor alternating-axis magnetic circuit and a direct-axis magnetic circuit, so that the salient pole ratio is increased, and the motor torque is improved. The rotor structure of the synchronous reluctance motor is generally two types, one type is a pure reluctance motor, no auxiliary magnetic material is added in the rotor, and the motor has poor performance because no auxiliary magnetic material is needed to reduce the cost; another is a reluctance motor with permanent magnets inserted, and since the permanent magnets are required to be inserted, the permanent magnets are generally regular cuboid, so that the magnetic barrier structure of the rotor must be regular, and the shape is limited, so that the reluctance torque cannot be maximized. There is also a case that the magnetic barrier structure of the rotor must be regular so that the reluctance torque cannot be maximized.
Disclosure of Invention
The utility model aims to solve the problems that the existing synchronous reluctance motor is poor in performance and cannot enable reluctance torque to be maximum. The utility model provides a motor rotor and a synchronous reluctance motor with the motor rotor, which can improve the motor performance and maximize the reluctance torque.
In order to solve the above technical problem, an embodiment of the present utility model provides a motor rotor, including a rotor core, the rotor core is provided with a plurality of magnetic barrier structures uniformly distributed along a circumferential direction thereof, the magnetic barrier structure includes: at least three layers of mounting grooves are sequentially arranged along the radial direction of the rotor core, permanent magnetic particles are filled in the mounting grooves, and the permanent magnetic particles are fixed in the mounting grooves through an adhesive.
According to another embodiment of the utility model, the permanent magnet particles are one of neodymium iron boron particles, samarium cobalt particles, alnico particles, ferrite particles and samarium iron nitrogen particles.
According to another embodiment of the utility model, the binder is polyamide or polyphenylene sulfide.
According to another embodiment of the present utility model, the mounting grooves of the outermost layer of the magnetic barrier structure are circular arc-shaped along the radial direction of the rotor core, and the remaining mounting grooves are conical curved, arcuate or arc-shaped.
According to another embodiment of the present utility model, the mounting grooves of the outermost layer of the magnetic barrier structure are circular arc-shaped in the radial direction of the rotor core, and the remaining mounting grooves are hyperbolic.
According to another embodiment of the utility model, each hyperbolic mounting groove includes an inner side edge and an outer side edge, the inner side edge and the outer side edge having different curvature.
According to another embodiment of the utility model, the magnetic barrier structure includes four layers of mounting slots.
According to another embodiment of the utility model, the mounting slots have a central symmetry axis in the radial direction of the rotor core, and the remaining mounting slots are provided with connecting bridges on the central symmetry axis except for the outermost mounting slot.
According to another embodiment of the utility model, the permanent magnet particles are injected into the mounting slots of the rotor core by injection molding.
Embodiments of the present utility model also provide a synchronous reluctance motor comprising a motor rotor as described above.
Compared with the prior art, the utility model has the following advantages:
through evenly setting up a plurality of magnetic barrier structures in rotor core's circumference, the magnetic barrier structure includes the radial at least three-layer mounting groove that sets gradually along rotor core, and the mounting groove intussuseption is filled with permanent magnetism granule, and permanent magnetism granule is as helping the magnetism material, is fixed in the mounting groove through the adhesive. In the utility model, the permanent magnetic particles can be made into any shape to be filled in the mounting groove, so that the shape of the mounting groove can be optimized, thereby maximizing the reluctance torque and improving the motor performance.
Drawings
Fig. 1 is a schematic diagram of a rotor structure in which permanent magnetic particles are filled in a mounting groove according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a rotor structure with permanent magnetic particles not filled in a mounting groove according to an embodiment of the utility model.
Reference numerals illustrate:
1. rotor core, 2, mounting groove, 21, first layer mounting groove, 22, second layer mounting groove, 23, third layer mounting groove, 24, fourth layer mounting groove, 241, inner side, 242, outer side, 3, connecting bridge.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
It should be noted that in this specification, 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 embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
The terms "first," "second," "third," "fourth," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "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 embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a motor rotor with permanent magnetic particles filled in a mounting groove according to an embodiment of the present utility model; fig. 2 is a schematic structural diagram of a motor rotor without permanent magnetic particles filled in a mounting groove according to an embodiment of the present utility model. In this embodiment, the motor rotor includes a rotor core 1, the rotor core 1 is provided with a plurality of magnetic barrier structures evenly distributed along its circumference, the magnetic barrier structure includes: at least three layers of mounting grooves 2 are sequentially arranged along the radial direction of the rotor core 1, permanent magnetic particles are filled in the mounting grooves 2, and the permanent magnetic particles are fixed in the mounting grooves 2 through an adhesive.
By adopting the technical scheme, a plurality of magnetic barrier structures are uniformly arranged in the circumferential direction of the rotor core 1, each magnetic barrier structure comprises at least three layers of mounting grooves 2 which are sequentially arranged along the radial direction of the rotor core 1, permanent magnetic particles are filled in the mounting grooves 2 and serve as magnetism-assisting materials, and the permanent magnetic particles are fixed in the mounting grooves 2 through adhesives. In the present utility model, permanent magnetic particles can be made to be arbitrarily shaped to be filled into the installation groove 2, and thus the present utility model can optimize the shape of the installation groove 2, thereby maximizing reluctance torque and improving motor performance.
Specifically, the rotor core 1 is formed by laminating a plurality of rotor punching sheets. Preferably, the rotor core 1 includes a plurality of first magnetic poles and a plurality of second magnetic poles. The number of first poles is equal to the number of second poles. The first magnetic poles and the second magnetic poles are disposed angularly about the central axis of the rotor core 1 in alternating relationship. When the rotor includes a plurality of first magnetic poles and a plurality of second magnetic poles, each first magnetic pole is circumferentially arranged between two second magnetic poles, and each second magnetic pole is circumferentially arranged between two first magnetic poles. In the present embodiment, the rotor core 1 has an eight-pole structure, but may have a six-pole structure or a larger number of magnetic poles, but each of the magnetic poles is arranged in the same manner, and the magnetic properties of each adjacent first magnetic pole and second magnetic pole are opposite.
Preferably, each of the first magnetic poles and each of the second magnetic poles includes a magnetic barrier structure including a plurality of mounting grooves 2 provided in a radial direction of the rotor core 1.
Further, in this embodiment, the permanent magnetic particles are one of neodymium iron boron particles, samarium cobalt particles, alnico particles, ferrite particles, and samarium iron nitrogen particles.
Optionally, ferrite is selected as the permanent magnetic particles. Because rare earth resources are short, rare earth permanent magnets are generally expensive, and the torque of the synchronous reluctance motor mainly comes from reluctance torque, ferrite is adopted in the reluctance motor, so that the manufacturing cost of a rotor is reduced.
Preferably, in the present utility model, the binder is Polyamide (PA) or polyphenylene sulfide (PPS).
Specifically, in the production, the permanent magnetic particles and the adhesive may be mixed together and injected into the mounting groove 2 of the rotor core 1 by injection molding, so that the permanent magnetic particles and the adhesive are integrally injection molded into the mounting groove 2. In this way, the shape of the mounting groove 2 is not limited by the shape of the permanent magnet, and the shape of the mounting groove 2 can be set according to actual needs, and desired motor performance and maximum reluctance torque can be obtained.
Illustratively, in the radial direction of the rotor core 1, the shape of the mounting groove 2 of the outermost layer of the magnetic barrier structure is circular arc, and the shape of the remaining mounting grooves 2 is conical curve, arcuate or arc.
Preferably, the mounting groove 2 of the outermost layer of the magnetic barrier structure has a circular arc shape along the radial direction of the rotor core 1, and the remaining mounting grooves 2 have hyperbolic shapes.
By adopting the technical scheme, the motor has higher salient pole ratio, can generate higher reluctance torque and improves the performance of the motor.
Further, each hyperbolic mounting groove 2 includes an inner side edge and an outer side edge, which are curved in different degrees.
Specifically, the inner side and the outer side of each mounting groove 2 are curved to define a hyperbolic shape of the mounting groove 2, and coefficients of the hyperbolas of the inner side and the outer side are different, thereby forming the shape of the mounting groove 2 having a wide middle and narrow both sides in the present embodiment, so that reluctance torque is maximized.
Illustratively, in one embodiment of the present utility model, the magnetic barrier structure includes four layers of mounting slots 2, as shown in FIG. 1.
Specifically, in the present embodiment, as shown in fig. 1, in the radial direction of the rotor core 1, it sequentially includes, from the outside to the inside: the first layer of mounting grooves 21, the second layer of mounting grooves 22, the third layer of mounting grooves 23 and the fourth layer of mounting grooves 24, wherein the first layer of mounting grooves 21 are arc-shaped, and the second layer of mounting grooves 22 to the fourth layer of mounting grooves 24 are hyperbolic. By adopting the technical scheme, the motor performance can be improved, and the reluctance torque of the synchronous reluctance motor can be maximized.
Illustratively, as shown in fig. 2, taking the fourth-layer installation groove 24 as an example, the fourth-layer installation groove 24 includes an inner side 241 and an outer side 242, and the hyperbolic coefficients of the inner side 241 and the outer side 242 are different, so that their curved radians are different, and a shape is formed in which the inner side 241 and the outer side 242 are spaced apart from each other at a distance from the middle of the installation groove, then gradually narrow toward the spaces at both ends of the groove body, and are closed at both ends.
Further, the mounting grooves 2 have a central symmetry axis in the radial direction of the rotor core 1, and the rest of the mounting grooves 2 except the outermost mounting groove are provided with connection bridges 3 on the central symmetry axis.
Specifically, laminating connecting bridge 3 in the middle part of mounting groove 2 can strengthen the mechanical strength of rotor, has reduced the probability of occurrence of rotor deformation when the rotor rotates.
According to the motor rotor provided by the utility model, the plurality of magnetic barrier structures are uniformly arranged in the circumferential direction of the rotor core 1, each magnetic barrier structure comprises at least three layers of mounting grooves 2 which are sequentially arranged along the radial direction of the rotor core 1, the mounting grooves 2 are filled with permanent magnetic particles, the permanent magnetic particles are used as magnetism-assisting materials, and the permanent magnetic particles are fixed in the mounting grooves 2 through an adhesive. In the present utility model, permanent magnetic particles can be made to be arbitrarily shaped to be filled into the installation groove 2, and thus the present utility model can optimize the shape of the installation groove 2, thereby maximizing reluctance torque and improving motor performance.
Embodiments of the present utility model also provide a synchronous reluctance motor comprising a motor rotor as described above.
While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.
Claims (10)
1. The utility model provides a motor rotor, includes rotor core, its characterized in that, rotor core is provided with a plurality of magnetic barrier structures of following its circumference evenly distributed, the magnetic barrier structure includes: and the permanent magnetic particles are fixed in the mounting grooves through an adhesive.
2. The motor rotor of claim 1, wherein the permanent magnet particles are one of neodymium-iron-boron particles, samarium-cobalt particles, alnico particles, ferrite particles, and samarium-iron-nitrogen particles.
3. The electric machine rotor of claim 1, wherein the binder is polyamide or polyphenylene sulfide.
4. The motor rotor according to claim 1, wherein the mounting grooves of the outermost layer of the flux barrier structure are circular arc-shaped in a radial direction of the rotor core, and the remaining mounting grooves are conical curved, arcuate or arc-shaped.
5. The motor rotor as set forth in claim 4, wherein the mounting grooves of the outermost layer of the flux barrier structure are circular arc-shaped in the radial direction of the rotor core, and the remaining mounting grooves are hyperbolic in shape.
6. The electric machine rotor of claim 5, wherein each of the hyperbolic-shaped mounting grooves includes an inner side and an outer side, the inner side and the outer side having different curvature.
7. The motor rotor of claim 6, wherein the magnetic barrier structure includes four layers of the mounting slots.
8. The motor rotor according to any one of claims 1 to 7, wherein the mounting grooves have a central symmetry axis in a radial direction of the rotor core, and the rest of the mounting grooves except for the outermost mounting groove are provided with connection bridges on the central symmetry axis.
9. The motor rotor of claim 1, wherein the permanent magnet particles are injected into the mounting slots of the rotor core by injection molding.
10. A synchronous reluctance machine comprising a machine rotor as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320699151.5U CN219893040U (en) | 2023-03-31 | 2023-03-31 | Motor rotor and synchronous reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320699151.5U CN219893040U (en) | 2023-03-31 | 2023-03-31 | Motor rotor and synchronous reluctance motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219893040U true CN219893040U (en) | 2023-10-24 |
Family
ID=88404117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320699151.5U Active CN219893040U (en) | 2023-03-31 | 2023-03-31 | Motor rotor and synchronous reluctance motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219893040U (en) |
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2023
- 2023-03-31 CN CN202320699151.5U patent/CN219893040U/en active Active
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