CN212751944U - Rotor of permanent magnet synchronous motor - Google Patents
Rotor of permanent magnet synchronous motor Download PDFInfo
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- CN212751944U CN212751944U CN202021840576.6U CN202021840576U CN212751944U CN 212751944 U CN212751944 U CN 212751944U CN 202021840576 U CN202021840576 U CN 202021840576U CN 212751944 U CN212751944 U CN 212751944U
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- silicon steel
- steel sheet
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Abstract
The utility model provides a rotor of a permanent magnet synchronous motor, which comprises a rotor silicon steel sheet lamination, wherein a plurality of radial grooves are arranged on the outer wall of the rotor silicon steel sheet lamination, the inner ends of the radial grooves are arranged as rotor end fixing grooves, a permanent magnet or a magnetic pole is arranged between every two adjacent radial grooves, and a gap between every two adjacent permanent magnets or magnetic poles and the radial grooves are communicated along the radial direction of the rotor silicon steel sheet lamination to form a magnetic fixing groove; the rotor magnetic fixing device is characterized by further comprising elastic magnetic fixing sheets, the two side edges of each elastic magnetic fixing sheet are bent in the same direction to form flanges, the two elastic magnetic fixing sheets form a group of elastic magnetic fixing devices which are inserted into one magnetic fixing groove back to back, the two flanges on the outer side of each group of elastic magnetic fixing devices abut against the two opposite side end faces of the two permanent magnets or the magnetic poles, the two flanges on the inner side abut against the inner wall of the rotor end fixing groove in the reverse direction, each flange generates elastic deformation, and the permanent magnets or the magnetic poles and the rotor silicon steel sheet are tightly and fixedly laminated. The embodiment has good stability and accurate positioning, reduces magnetic leakage and improves process efficiency.
Description
Technical Field
The utility model belongs to the technical field of PMSM, concretely relates to PMSM's rotor.
Background
The surface-mounted rotor of the traditional permanent magnet motor mostly adopts an adhesive to fix the permanent magnet on the outer diameter cylindrical surface of the motor rotor, and the connection mode influences the production efficiency and reliability of the motor.
In order to solve the above technical problems, chinese patent application No. 201410105008.4 discloses a permanent magnet motor rotor, in which permanent magnets are fixed on a cylindrical surface of the outer diameter of the rotor by magnetic fixing sheets, so that the permanent magnets are tightly connected with the outer diameter of the motor rotor to improve the quality of the motor and reduce the cost.
In addition, in the prior art, a surface-mounted magnetic source fixing mode is adopted, namely special glue is bonded on the outer wall of the rotor silicon steel lamination. Because the working process of the motor has various forces such as temperature rise, centrifugal force and the like, the requirement on glue is strict, special equipment is required to uniformly heat within a certain time, and the production process efficiency is low, so that the connection quality is poor, the consistency of products is poor, the bonding quality is difficult to ensure, and the cost is high.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, the utility model discloses it is necessary to provide a PMSM's rotor, reliability, steadiness that can improve magnetism source and rotor and be connected, and process efficiency.
The purpose of the utility model can be realized by the following technical proposal:
a rotor of a permanent magnet synchronous motor comprises rotor silicon steel sheet laminations and is characterized in that a plurality of radial grooves extending along the axial direction of the rotor silicon steel sheet laminations are formed in the outer walls of the rotor silicon steel sheet laminations, the inner ends of the radial grooves are provided with rotor end fixing grooves, permanent magnets or magnetic poles with the same length as the rotor silicon steel sheet laminations are arranged between every two adjacent radial grooves, and a gap between every two adjacent permanent magnets or magnetic poles and the corresponding radial grooves are communicated along the radial direction of the rotor silicon steel sheet laminations to form a magnetic fixing groove; the rotor further comprises an elastic magnetic fixing sheet, two opposite sides of the elastic magnetic fixing sheet are bent to the same side to form two flanges, the two elastic magnetic fixing sheets are back to form a group of elastic magnetic fixing devices, two opposite bent flanges are arranged on two sides of each elastic magnetic fixing device respectively, each elastic magnetic fixing device is arranged in each magnetic fixing groove, the two flanges on the outer side of each elastic magnetic fixing device are abutted to the opposite two side end faces of the corresponding two permanent magnets or magnetic poles respectively, the two flanges on the inner side are abutted to the inner wall of the rotor end fixing groove in the opposite direction, each flange generates elastic deformation, and the permanent magnets or the magnetic poles and the rotor silicon steel sheet tightly hold the lamination to realize the fixation of the permanent magnets or the magnetic poles and the rotor silicon steel sheet.
Preferably, the two opposite side end faces of each two adjacent permanent magnets or magnetic poles are inclined planes or arc surfaces which are symmetrical to each other and gradually separated from inside to outside.
Preferably, the elastic magnetic fixing sheets are made of nonmagnetic materials, two flanges of each elastic magnetic fixing sheet are respectively pressed on the side end faces of the permanent magnets or the magnetic poles and the inner wall of the rotor end fixing groove, the elastic force generated by back-to-back arrangement of each group of two elastic magnetic fixing sheets enables each flange to firmly grasp the rotor silicon steel sheet lamination and the permanent magnets or the magnetic poles, enough force enables the permanent magnets or the magnetic poles positioned on the outer cylindrical surface of the rotor silicon steel sheets to be attached to the rotor silicon steel sheets, the phenomenon that the permanent magnets or the magnetic poles are separated from the surface of the rotor silicon steel sheets due to relative sliding relative to the outer cylindrical surface of the rotor silicon steel sheets and centrifugal force is avoided, and the plurality of magnetic fixing sheets are distributed in the arc circumferential.
Preferably, the rotor silicon steel sheet lamination is cylindrical and is formed by laminating a plurality of rotor silicon steel sheets; the surface of the permanent magnet or the magnetic pole is an arc surface, the whole permanent magnet or the magnetic pole is in a bar shape, the radian of the arc surface corresponds to the rotor silicon steel sheet lamination, and specifically, the inner side radius of the permanent magnet or the magnetic pole is equal to the outer diameter of the rotor silicon steel sheet lamination so that the inner side surface of the permanent magnet or the magnetic pole and the outer wall of the rotor silicon steel sheet lamination are mutually attached tightly.
Preferably, the plurality of magnetic fixing grooves are distributed at equal intervals along the circumference of the rotor, so that elastic deformation forces generated by the plurality of elastic magnetic fixing devices inserted into the magnetic fixing grooves are balanced, and the permanent magnets or the magnetic poles and the rotor silicon steel sheet are firmly and uniformly fixed with each other.
Preferably, the radial slots include straight slots along the radial direction of the rotor silicon steel sheet lamination and circular holes at the inner ends of the straight slots, the circular holes are the rotor end fixing slots, and the straight slots are formed by two plane walls which are parallel to each other. The straight wall is arranged along the radial direction from outside to inside in an inclined mode of a cylinder formed by rotor silicon steel sheet laminations and is distributed correspondingly according to the number of stages and the size of the permanent magnets or magnetic poles. The circumference formed by the radial grooves is smaller towards the center of the rotor silicon steel sheet, and a radial shape is formed.
Preferably, the rotor further comprises a hollow shaft, the rotor silicon steel sheet lamination is fixed on the hollow shaft, and the hollow shaft and the differential are combined into a whole.
Compared with the prior art, the utility model has the advantages as follows:
1. the rotor adopts the fixed magnetic sheet to fix the permanent magnet, more reliable fixation is carried out on the magnetic source, the stability is good, the positioning is accurate, the magnetic leakage is reduced, and the quality and the process efficiency are improved. The motor efficiency is improved, the structure is reliable, the process is simple, and the quality is easy to guarantee.
2. A plurality of fixed magnetic sheets in the rotor are distributed on the circumferential direction of the permanent magnet, so that the permanent magnet and a rotor silicon steel sheet (magnetizer) can be more stably fixed, and the reliability is higher than that of gluing.
Drawings
FIG. 1 is a schematic view of the present rotor;
FIG. 2 is a schematic structural view of the magnetic fixing sheet.
In the figure, 1, rotor silicon steel sheet (magnetizer); 2. a permanent magnet; 3. magnetic steel arc surface; 4. fixing grooves; 5. Fixing magnetic sheets; 6. a first flanging; 7. second flanging; 8. a hollow shaft integral with the differential; 9. a differential mechanism; 10. a planar wall.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, a plurality of permanent magnets 2 are fixed on the outer wall of a rotor silicon steel sheet 1, the end faces of two sides of each permanent magnet 2 are both provided with arc surfaces or inclined surfaces 3, and a fixing groove 4 which is uniformly arranged along the outer circumference of the rotor and has a hole at the inner end thereof is formed on the rotor silicon steel sheet 1. The gap between two adjacent permanent magnets 2 is communicated with the corresponding fixed groove 4 along the axial direction to form a magnetic fixing groove. The rotor of this embodiment further includes magnetic fixing sheets 5 made of non-magnetic conductive material with elasticity, the upper end and the lower end of each magnetic fixing sheet 5 are bent toward the same side to form a first flange 6 and a second flange 7, the two magnetic fixing sheets 5 form a set of magnetic fixing devices back to back, and each set of magnetic fixing devices is disposed in one magnetic fixing groove. The first flanging 6 of each permanent magnet piece 5 is pressed on the arc surface or the inclined surface 3 of the permanent magnet 2 in a pressure-sharing manner, and the second flanging 7 is pressed on the inner wall of the hole of the fixed groove 4.
In the structure, the first flanging 6 and the second flanging 7 of the magnetic fixing sheet 5 are respectively pressed on the arc or chamfer 3 surface of the permanent magnet 2 and abut against the inner wall of the fixing groove 4 and elastically deform, and the rotor silicon steel sheet 1 and the permanent magnet 2 are tightly fixed together by the elastic force generated by the magnetic fixing sheet 5.
As shown in fig. 1, in this embodiment, the permanent magnet 2 is in the shape of an arc sheet with a radian, and the rotor silicon steel sheet 1 is in a cylindrical shape formed by stacking a plurality of silicon steel sheets together. The inner side of the permanent magnet 2 is closely attached to the cylindrical outer circumference of the rotor silicon steel sheet 1. The arc or the inclined plane 3 of the permanent magnet 2 and the rotor silicon steel sheet fixing groove 4 are distributed along the circumferential direction of the permanent magnet 2 and the rotor silicon steel sheet 1 respectively. Each permanent magnet 2 corresponds to at least one of the fixing grooves 4. The first flanging 6 of each magnetic fixing sheet 5 is pressed on the arc surface or the inclined surface 3 of the magnet or the magnetic pole 2, and the second flanging 7 is propped against the inner wall of the rotor silicon steel sheet fixing groove 4. The plurality of magnetic fixing devices are distributed on the arc surface or the inclined surface of the permanent magnet 2 and the rotor silicon steel sheet 1, and the permanent magnet 2 and the rotor silicon steel sheet 1 can be stably fixed.
As shown in fig. 1, in the present embodiment, the fixing groove 4 has two plane walls 10 and one hole. The plane walls 10 are arranged along the radial direction of the rotor, the two plane walls 10 and the holes at the end parts form the magnetic fixing grooves 4, the fixing grooves 4 extend from the cylindrical surface of the rotor silicon steel sheet 1 to the circle center, the distance between the fixing grooves is smaller toward the circle center, and the fixing grooves 4 are radial.
In the structure, a fixed magnetic sheet 5 is pressed on the cambered surface or the inclined surface 3 of the same magnet or magnetic pole, so that the permanent magnet 2 is firmly fixed on the outer cylindrical surface of the rotor silicon steel sheet 1.
As shown in fig. 1, the rotor shaft of the embodiment further includes a hollow shaft 8, the rotor silicon steel sheet 1 is sleeved on the hollow shaft, and the hollow shaft 8 and the differential 9 are of an integrated structure.
In this embodiment, the permanent magnet 2 may be a magnetic pole.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A rotor of a permanent magnet synchronous motor comprises rotor silicon steel sheet laminations and is characterized in that a plurality of radial grooves extending along the axial direction of the rotor silicon steel sheet laminations are formed in the outer walls of the rotor silicon steel sheet laminations, the inner ends of the radial grooves are provided with rotor end fixing grooves, permanent magnets or magnetic poles with the same length as the rotor silicon steel sheet laminations are arranged between every two adjacent radial grooves, and a gap between every two adjacent permanent magnets or magnetic poles and the corresponding radial grooves are communicated along the radial direction of the rotor silicon steel sheet laminations to form a magnetic fixing groove; the rotor further comprises an elastic magnetic fixing sheet, two opposite sides of the elastic magnetic fixing sheet are bent to the same side to form two flanges, the two elastic magnetic fixing sheets are back to form a group of elastic magnetic fixing devices, two opposite bent flanges are arranged on two sides of each elastic magnetic fixing device respectively, each elastic magnetic fixing device is arranged in each magnetic fixing groove, the two flanges on the outer side of each elastic magnetic fixing device are abutted to the opposite two side end faces of the corresponding two permanent magnets or magnetic poles respectively, the two flanges on the inner side are abutted to the inner wall of the rotor end fixing groove in the opposite direction, each flange generates elastic deformation, and the permanent magnets or the magnetic poles and the rotor silicon steel sheet tightly hold the lamination to realize the fixation of the permanent magnets or the magnetic poles and the rotor silicon steel sheet.
2. A rotor according to claim 1, wherein the resilient magnetically permeable sheet is made of a non-magnetic material.
3. The rotor according to claim 2, wherein the opposite side end surfaces of each two adjacent permanent magnets or magnetic poles are provided with mutually symmetrical inclined surfaces or arc surfaces which are gradually separated from inside to outside.
4. The rotor as claimed in claim 3, wherein the rotor silicon steel sheet lamination is cylindrical and is formed by laminating a plurality of rotor silicon steel sheets; the surface of the permanent magnet or the magnetic pole is an arc surface, the whole permanent magnet or the magnetic pole is in a strip shape, and the radian of the arc surface corresponds to the rotor silicon steel sheet lamination, so that the inner side surface of the permanent magnet or the magnetic pole and the outer wall of the rotor silicon steel sheet lamination are tightly attached to each other.
5. The rotor of claim 4, wherein a plurality of the magnetic fixing grooves are distributed at equal intervals along the circumference of the rotor, so that elastic deformation forces generated by a plurality of elastic magnetic fixing devices inserted into the magnetic fixing grooves are balanced.
6. The rotor as claimed in claim 1, wherein the radial slots comprise straight slots along a radial direction of the rotor silicon steel sheet lamination and circular holes at inner ends of the straight slots, i.e., the rotor end fixing slots, the straight slots being formed by two planar walls parallel to each other.
7. The rotor as claimed in any one of claims 1 to 6, further comprising a hollow shaft to which the rotor silicon steel sheet laminate is fixed, the hollow shaft being integrated with the differential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021840576.6U CN212751944U (en) | 2020-08-28 | 2020-08-28 | Rotor of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021840576.6U CN212751944U (en) | 2020-08-28 | 2020-08-28 | Rotor of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212751944U true CN212751944U (en) | 2021-03-19 |
Family
ID=74991943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021840576.6U Active CN212751944U (en) | 2020-08-28 | 2020-08-28 | Rotor of permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212751944U (en) |
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2020
- 2020-08-28 CN CN202021840576.6U patent/CN212751944U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211109 Address after: 519000 Room 601, building 9, No. 2, nanpingyuan street, Xiangzhou District, Zhuhai City, Guangdong Province Patentee after: Du Xiaobing Address before: 519000 room 6a, building 8, No. 221, Shuiwan Road, Gongbei, Xiangzhou District, Zhuhai City, Guangdong Province Patentee before: Guo Xiaohui |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221122 Address after: No. 20-7, Changjiang Road, Sanshan New Town, Guicheng Street, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Zhonghuibao Energy Technology Co.,Ltd. Address before: 519000 Room 601, building 9, No. 2, nanpingyuan street, Xiangzhou District, Zhuhai City, Guangdong Province Patentee before: Du Xiaobing |
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| TR01 | Transfer of patent right |