CN210640745U - Novel rotor core structure of asynchronous starting permanent magnet synchronous motor - Google Patents
Novel rotor core structure of asynchronous starting permanent magnet synchronous motor Download PDFInfo
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- CN210640745U CN210640745U CN201921250703.4U CN201921250703U CN210640745U CN 210640745 U CN210640745 U CN 210640745U CN 201921250703 U CN201921250703 U CN 201921250703U CN 210640745 U CN210640745 U CN 210640745U
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Abstract
The utility model discloses a novel asynchronous starting PMSM's rotor core structure, including rotor punching sheet group, inlay the rotor magnetic steel sheet of putting on the rotor punching and connect the rotor end plate on rotor punching group top and bottom, a plurality of rotor magnet steel caulking grooves of circumference equipartition on the rotor punching, the rotor magnet steel caulking groove is fan-shaped, the rotor magnetic steel sheet inlays and puts in the rotor magnet steel caulking groove, 4 rotor magnetic steel sheets are inlayed in every rotor magnet steel caulking groove, at least four squirrel cage grooves that are used for interlude cylindrical copper bar and form the squirrel cage with the copper ring are seted up to the annular on the outside ring face of rotor punching, seted up two at least rotor core fixing device pull rod screws on the ring face of rotor punching. The utility model discloses make the motor possess good operating performance, improve the working property of motor simultaneously.
Description
Technical Field
The utility model belongs to the technical field of asynchronous starting PMSM technique and specifically relates to a novel asynchronous starting PMSM's rotor core structure.
Background
China is a country with relative lack of energy and a large country with energy consumption. With the rapid development of economy in China, the demand on energy sources is increasing. Wind power generation as a new energy source and a green energy source is an industry which is emphatically supported and encouraged by the country, and a series of preferential and encouragement policies are issued to the national and local governments.
Considering that the driving system is taken as the basis of various industries, the driving system plays an irreplaceable role in the development of economy. The motor is used as a core component in a driving system, and the performance of the motor is related to the performance level of the whole system. Therefore, the method has become one of the focuses of government and research institutions of two countries at home and abroad in recent years. Meanwhile, the permanent magnet motor has the problems of energy conservation and environmental protection at present, and the development of the permanent magnet motor is rapid.
The most prominent of the electric vehicles is the combination of permanent magnet motor driving systems and vehicle technologies. According to the U.S. related data report, benthama pluris is up to about 0.2 million in U.S. markets on 9 months of 2018; total sales of tesla Model3 in 2018 reached about 8.2 million; and by 12 months in 2018, 125 thousands of electric automobiles are sold in China. The mature production technology of the electric automobile lays a good foundation for the development of the asynchronous starting permanent magnet motor, and further research needs to be carried out on the motor of the type, so that the implementation of the national policy of energy conservation and environmental protection is promoted.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: on the basis of taking reference to the traditional asynchronous starting permanent magnet synchronous motor, a novel rotor core structural design is provided, so that the motor with 380V-8p-18kW-750rpm has good running performance, and meanwhile, the working performance of the motor is improved.
The utility model provides a technical scheme that its technical problem adopted is: a novel rotor core structure of an asynchronous starting permanent magnet synchronous motor comprises a rotor punching sheet group formed by mutually overlapping a plurality of annular rotor punching sheets, rotor magnetic steel sheets embedded on the rotor punching sheets and rotor end plates connected to the top end and the bottom end of the rotor punching sheet group, wherein a plurality of rotor magnetic steel embedding grooves are uniformly distributed on the circumference of each rotor punching sheet, the rotor magnetic steel caulking grooves are fan-shaped, the rotor magnetic steel sheets are embedded in the rotor magnetic steel caulking grooves, 4 rotor magnetic steel sheets, namely a first rotor magnetic steel sheet, a second rotor magnetic steel sheet, a third rotor magnetic steel sheet and a fourth rotor magnetic steel sheet are embedded in each rotor magnetic steel caulking groove, a gap is formed between every two adjacent rotor magnetic steel caulking grooves, at least four squirrel cage grooves for inserting cylindrical copper bars and forming a squirrel cage with the copper rings are annularly formed on the outer side ring surface of the rotor punching sheet, and the annular surface of the rotor punching sheet is provided with at least two pull rod screw holes of the rotor core fixing device.
Furthermore, the number of the rotor magnetic steel caulking grooves is 8, and the fan-shaped opening angle η is set to be 45 degrees.
Furthermore, the rotor magnetic steel sheets are symmetrically arranged in a W shape in the rotor magnetic steel caulking groove, the first rotor magnetic steel sheet and the fourth rotor magnetic steel sheet are arranged in parallel to the fan-shaped edge line, an included angle α between the second rotor magnetic steel sheet and the first rotor magnetic steel sheet is set to be 65 degrees, an included angle β between the third rotor magnetic steel sheet and the second rotor magnetic steel sheet is set to be 84 degrees, and one end, close to the outer ring surface of the rotor punching sheet, of the first rotor magnetic steel sheet and one end, close to the outer ring surface of the rotor punching sheet, of the fourth rotor magnetic steel sheet are embedded at the edge of the.
Furthermore, 8 squirrel cage grooves are formed between the first rotor magnetic steel sheet and the fourth rotor magnetic steel sheet on the outer side ring surface of the rotor punching sheet, and the included angle theta formed by the centers of two adjacent squirrel cage grooves and the center of the rotor punching sheet is set to be 5 degrees.
Furthermore, the squirrel cage groove consists of a straight groove wall and a groove bottom with an arc-shaped section, and the arc-shaped angle omega is 47 degrees.
Furthermore, two tie rod screw holes of the rotor iron core fixing device are formed in each rotor magnetic steel caulking groove, the included angle phi between the center of the tie rod screw hole of the first rotor iron core fixing device and the connecting line of the center of the tie rod screw hole of the second rotor iron core fixing device and the center of the rotor punching sheet is set to be 25 degrees, and the included angle gamma between the connecting line of the center of the tie rod screw hole of the first rotor iron core fixing device and the center of the rotor punching sheet and the fan-shaped edge line is set to be 10 degrees.
Furthermore, the rotor magnetic steel sheet is made of a high-performance rare earth permanent magnet material.
The utility model discloses a novel asynchronous starting PMSM's rotor core structure, its beneficial effect is: on the premise of omitting a frequency converter matched with a permanent magnet motor, the loss of the motor is effectively reduced and the output performance is improved; the starting time of the motor is shortened, and the locked-rotor characteristic of the motor is enhanced; compared with a permanent magnet motor driving system, the maintenance cost of the driving system is reduced; the rotor part adopts a round copper bar (or copper bar) squirrel cage structure, so that the starting performance and the locked rotor performance of the motor are enhanced; the high-performance rare earth permanent magnet material has high residual magnetic density, coercive force and high magnetic energy product, and can allow the developed motor to have larger air gap length and power density, so that the permanent magnet mosaic and magnetic circuit structure design has great flexibility and easy variability. Meanwhile, the precise simulation design technology, the structural design technology, the assembly technology and the like are adopted, the bottlenecks in the aspects of the cooling structure, the vibration noise and the like of the motor at present are broken through, and the development of the motor industry in China is indirectly improved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
in the figure, 1, a rotor punching sheet, 2, a second rotor core fixing device, a pull rod screw hole, 3, a first rotor core fixing device, a pull rod screw hole, 4, a first rotor magnetic steel sheet, 5, a second rotor magnetic steel sheet, 6, a third rotor magnetic steel sheet, 7, a fourth rotor magnetic steel sheet and 8, a squirrel cage groove are arranged.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the novel rotor core structure of the asynchronous starting permanent magnet synchronous motor comprises a rotor punching sheet group formed by overlapping a plurality of annular rotor punching sheets 1, rotor magnetic steel sheets embedded on the rotor punching sheets 1, and rotor end plates pressed on the top end and the bottom end of the rotor punching sheet group, wherein the rotor end plates are used for pressing magnetic steel and are made of aluminum alloy materials;
the rotor punching sheet 1 is made of a silicon steel material with the trademark of 50W470, a special silicon steel sheet material is replaced, and the purpose of saving cost is achieved under the condition that the performance reaches the standard, 8 rotor magnetic steel embedded grooves are evenly distributed on the circumference of the rotor punching sheet 1, the rotor magnetic steel embedded grooves are fan-shaped, the fan-shaped opening angle η is set to be 45 degrees, 4 rotor magnetic steel sheets are embedded in each rotor magnetic steel embedded groove and symmetrically embedded in a W shape, the rotor magnetic steel sheets are respectively a first rotor magnetic steel sheet 4, a second rotor magnetic steel sheet 5, a third rotor magnetic steel sheet 6 and a fourth rotor magnetic steel sheet 7, the problems of the magnetic steel groove shape and the magnetic steel amount are solved by using a magnetic circuit optimization method, the first rotor magnetic steel sheet 4 and the fourth rotor magnetic steel sheet 7 are arranged in parallel to a fan-shaped edge line, the included angle α between the second rotor magnetic steel sheet 5 and the first rotor magnetic steel sheet 5 is set to be 65 degrees, the included angle β between the third rotor magnetic steel sheet 6 and the second rotor magnetic steel sheet 5 is set to be 84 degrees, the first rotor magnetic steel sheet 4 and the fourth rotor magnetic steel sheet 7 are embedded at the edge of the rotor magnetic steel sheet 1;
the gap is arranged between the two adjacent rotor magnetic steel caulking grooves, a squirrel cage groove 8 for inserting a cylindrical copper bar and forming a squirrel cage with the copper ring is annularly formed on the outer side annular surface of the rotor punching sheet 1, so that the larger starting performance of the motor is realized, and larger rotation blocking torque is obtained, 8 squirrel cage grooves 8 are arranged between the first rotor magnetic steel sheet 4 and the fourth rotor magnetic steel sheet 7 on the outer side annular surface of the rotor punching sheet 1, the squirrel cage grooves 8 consist of straight groove walls and groove bottoms with arc-shaped sections (shown in figure 2), the arc-shaped angle omega is 47 degrees, and the included angle theta formed by the centers of the two adjacent squirrel cage grooves 8 and the center of the rotor punching sheet 1 is set to be 5 degrees;
two pull rod screw holes of the rotor core fixing device are formed in each rotor magnetic steel caulking groove, so that the magnetic steel structure is more compact, and the magnetic steel tool is simplified, wherein the included angle phi between the center of the pull rod screw hole 3 of the first rotor core fixing device and the connecting line of the center of the pull rod screw hole 2 of the second rotor core fixing device and the center of the rotor punching sheet is set to be 25 degrees, and the included angle gamma between the connecting line of the center of the pull rod screw hole 3 of the first rotor core fixing device and the center of the rotor punching sheet 1 and the fan-shaped edge line.
In the process of mounting the rotor magnetic steel sheet, a special mounting die is adopted for embedding the magnetic steel; meanwhile, if the demagnetization performance of the magnetic steel is reduced, a layer of thin copper sheet can be wound on the periphery of the rotor iron core, and after the installation is finished, the machine tool is uniformly used for punching, and the squirrel cage is installed.
The utility model discloses an asynchronous starting PMSM's rotor core structure is through innovateing and improving current forward position technique, designs the motor structure among the actuating system, can effectively improve the motor startability, and the highest starting torque can reach 2.2 times to omit converter equipment and relevant relay protection transposition, reduced manufacturing cost. Under the condition of reaching the national high-efficiency motor standard, the motor has wide application prospect in various fields of transportation, aerospace, chemical industry, petroleum and the like.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a novel asynchronous starting PMSM's rotor core structure, characterized by: comprises a rotor punching sheet group formed by mutually overlapping a plurality of annular rotor punching sheets (1), rotor magnetic steel sheets embedded on the rotor punching sheets (1) and rotor end plates connected with the top end and the bottom end of the rotor punching sheet group, a plurality of rotor magnetic steel caulking grooves are uniformly distributed on the circumference of the rotor punching sheets (1), the rotor magnetic steel caulking grooves are fan-shaped, the rotor magnetic steel sheets are embedded in the rotor magnetic steel caulking grooves, 4 rotor magnetic steel sheets are embedded in each rotor magnetic steel caulking groove, namely a first rotor magnetic steel sheet (4), a second rotor magnetic steel sheet (5), a third rotor magnetic steel sheet (6) and a fourth rotor magnetic steel sheet (7), a gap is formed between every two adjacent rotor magnetic steel caulking grooves, at least four squirrel cage grooves (8) which are used for penetrating cylindrical copper bars and form a squirrel cage with the copper rings are annularly arranged on the outer side ring surface of the rotor punching sheet (1), the annular surface of the rotor punching sheet (1) is provided with at least two pull rod screw holes of the rotor core fixing device.
2. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein the number of the rotor magnetic steel caulking grooves is 8, and the sector opening angle η is 45 degrees.
3. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor is characterized in that the rotor magnetic steel sheets are symmetrically arranged in a W shape in a rotor magnetic steel caulking groove, the first rotor magnetic steel sheet (4) and the fourth rotor magnetic steel sheet (7) are arranged in parallel to a fan-shaped edge line, an included angle α between the second rotor magnetic steel sheet (5) and the first rotor magnetic steel sheet (4) is set to be 65 degrees, an included angle β between the third rotor magnetic steel sheet (6) and the second rotor magnetic steel sheet (5) is set to be 84 degrees, and one ends, close to the outer ring surface of the rotor punching sheet (1), of the first rotor magnetic steel sheet (4) and the fourth rotor magnetic steel sheet (7) are embedded at the edge of the rotor punching sheet (1).
4. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: 8 squirrel cage grooves (8) are formed between the first rotor magnetic steel sheet (4) and the fourth rotor magnetic steel sheet (7) on the outer side ring surface of the rotor punching sheet (1), and an included angle theta formed by the centers of two adjacent squirrel cage grooves (8) and the center of the rotor punching sheet (1) is set to be 5 degrees.
5. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the squirrel cage groove (8) consists of a straight groove wall and a groove bottom with an arc-shaped section, and the arc-shaped angle omega is 47 degrees.
6. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: every rotor magnet steel caulking groove in establish two rotor core fixing device pull rod screw, first rotor core fixing device pull rod screw (3) center, second rotor core fixing device pull rod screw (2) center and rotor punching center line contained angle phi establish to 25, first rotor core fixing device pull rod screw (3) center and rotor punching (1) center line and fan-shaped edge line contained angle gamma establish to 10.
7. The novel rotor core structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the rotor magnetic steel sheet is made of high-performance rare earth permanent magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921250703.4U CN210640745U (en) | 2019-08-05 | 2019-08-05 | Novel rotor core structure of asynchronous starting permanent magnet synchronous motor |
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| CN201921250703.4U CN210640745U (en) | 2019-08-05 | 2019-08-05 | Novel rotor core structure of asynchronous starting permanent magnet synchronous motor |
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| CN210640745U true CN210640745U (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317246A (en) * | 2023-03-14 | 2023-06-23 | 浙江海川电气科技有限公司 | Rotor punching sheet of auxiliary magnetic reluctance motor |
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2019
- 2019-08-05 CN CN201921250703.4U patent/CN210640745U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317246A (en) * | 2023-03-14 | 2023-06-23 | 浙江海川电气科技有限公司 | Rotor punching sheet of auxiliary magnetic reluctance motor |
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