CN212811407U - Rotor core structure of asynchronous starting permanent magnet synchronous motor - Google Patents

Rotor core structure of asynchronous starting permanent magnet synchronous motor Download PDF

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Publication number
CN212811407U
CN212811407U CN202020961382.5U CN202020961382U CN212811407U CN 212811407 U CN212811407 U CN 212811407U CN 202020961382 U CN202020961382 U CN 202020961382U CN 212811407 U CN212811407 U CN 212811407U
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China
Prior art keywords
rotor
core structure
permanent magnet
rotor punching
synchronous motor
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CN202020961382.5U
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Chinese (zh)
Inventor
程寿国
钱伟
赵勇
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Jiangsu Aerospace Power Electric Co Ltd
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Jiangsu Aerospace Power Electric Co Ltd
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Abstract

The utility model discloses an asynchronous start PMSM rotor core structure, include the rotor towards the piece group that the piece coincide formed by a plurality of rotors and inlay the rotor magnet steel of putting on the rotor punching, the rotor punching is the annular, set up the damping hole on the rotor punching, the damping hole is located the annular edge, wear to establish the damping strip in the damping hole, set up heat dissipation channel on the damping hole, heat dissipation channel extends to the outer anchor ring of rotor punching, set up arc magnet steel groove on the rotor punching, the rotor magnet steel is inlayed in the magnet steel groove, the rotor magnet steel adopts the magnetization mode of Halbach array, set up the axial ventilation hole on the rotor punching. The rotor core structure of the asynchronous starting permanent magnet synchronous motor enables the 380V-8p-30kW motor to have good running performance, can reduce noise and vibration of the motor, and simultaneously improves the working performance of the motor.

Description

Rotor core structure of asynchronous starting permanent magnet synchronous motor
Technical Field
The utility model belongs to the technical field of asynchronous starting PMSM technique and specifically relates to an asynchronous starting PMSM rotor core structure.
Background
The motor, which is an indispensable driving core component in heavy industry, largely determines the amount of energy used. Until now, a large number of asynchronous induction motors (with the rotating speed of 1500-3000 r/min) and gear boxes are still used as equipment driving systems in the field, so that the lower energy utilization rate and energy consumption are brought. Considering the prominent performance of the permanent magnet motor in various aspects, compared with the similar motor, the weight of the motor is only 1/10 of that of the common motor, and meanwhile, the speed increasing box and the linkage device are omitted, so that the energy saving rate is 30-40%. Therefore, the permanent magnet motor is used in industrial production as soon as possible, and is one of effective ways for promoting smooth realization of the aims of energy conservation and emission reduction. However, the starting performance and efficiency of the existing permanent magnet motor are still to be improved, so that the permanent magnet motor is improved and innovated based on the current theoretical knowledge and design technology of the permanent magnet motor, and a novel rotor core structure of the asynchronous starting permanent magnet synchronous motor is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the rotor core structure of the asynchronous starting permanent magnet synchronous motor is designed, so that the 380V-8p-30kW motor has good running performance, the noise and vibration of the motor can be reduced, and the working performance of the motor is improved.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an asynchronous starting PMSM rotor core structure, includes the rotor punching sheet group that is formed by a plurality of rotor punching sheet coincide and inlays the rotor magnet steel of putting on the rotor punching sheet, the rotor punching sheet be the annular, set up the damping hole on the rotor punching sheet, the damping hole is located the annular edge, wear to establish the damping strip in the damping hole, the damping hole on set up heat dissipation channel, heat dissipation channel extend to the outer anchor ring of rotor punching sheet, set up arc magnet steel groove on the rotor punching sheet, the magnet steel inslot embeds rotor magnet steel, rotor magnet steel adopt the magnetization mode of Halbach array, set up axial ventilation hole on the rotor punching sheet.
Furthermore, the damping bars are brass bars.
Furthermore, the number of the damping holes is 80 which are circumferentially and uniformly distributed.
Furthermore, the number of the magnetic steel grooves is 8, and the magnetic steel grooves are circumferentially and uniformly distributed.
Furthermore, each pole of the rotor magnetic steel is composed of 11 pieces of magnetic steel.
Further, the rotor magnetic steel is adhered to the magnetic steel groove through heat-resistant glue.
Furthermore, the number of the axial ventilation holes is 8 and the axial ventilation holes are circumferentially and uniformly distributed.
The utility model discloses an asynchronous starting PMSM rotor core structure, its beneficial effect is: 1. the loss of the motor is effectively reduced, the higher harmonic content of the motor is reduced, and the air gap magnetic field waveform of the motor is smoothed; 2. the starting time of the motor is shortened, and the locked-rotor characteristic of the motor is enhanced; 3. the rotor part adopts a Halbach magnetizing mode, so that the harmonic content of the motor is reduced, and the output performance index of the motor is improved; 4. compared with a permanent magnet motor driving system, the maintenance cost of the driving system is reduced. 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 schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the configuration of the damping orifice;
in the figure: 1. the rotor comprises a rotor punching sheet, 2 damping strips, 3 rotor magnetic steels, 4 axial vent holes, 5 magnetic steel grooves, 6 heat dissipation channels and 7 damping holes.
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 rotor core structure of the asynchronous-start permanent magnet synchronous motor includes a rotor punching sheet group formed by overlapping a plurality of rotor punching sheets 1 and rotor magnetic steel 3 embedded on the rotor punching sheets 1, the rotor punching sheets 1 are annular, 80 damping holes 7 uniformly distributed in the circumference are formed on the rotor punching sheets 1, the damping holes 7 are located on the annular edge, damping strips 2 are penetrated in the damping holes 7, brass bars are selected for the damping strips 2, heat dissipation channels 6 (shown in fig. 2) are formed on the damping holes 7, the heat dissipation channels 6 extend to the outer annular surface of the rotor punching sheets 1, curved magnetic steel grooves 5 are formed on the rotor punching sheets 1, the magnetic steel grooves 5 are set to be 8 uniformly distributed in the circumference, rotor magnetic steel 3 is embedded in the magnetic steel grooves 5, the rotor magnetic steel 3 adopts a magnetizing mode of a Halbach array, and 8 axial ventilation holes 4 uniformly distributed in the circumference are formed on the.
Each pole of the rotor magnetic steel 3 is composed of 11 pieces of magnetic steel, and the rotor magnetic steel 3 is adhered in the magnetic steel groove 5 through heat-resistant glue.
The rotor punching sheet is made of a silicon steel material with the mark number of 50W470, and a special silicon steel sheet material is replaced, so that the purpose of saving cost is achieved under the condition that the performance reaches the standard. The magnetic steel is made of high-performance rare earth permanent magnet materials (high residual magnetic density, coercive force and high magnetic energy product), and the motor can be allowed to have large air gap length and power density, so that the magnetic steel has great flexibility and variability in the permanent magnet embedding and magnetic circuit structure design.
Will the utility model discloses an asynchronous starting PMSM rotor core structure applies to 380V-68p-30kW motor, and the motor possesses good operating performance to can reduce motor noise and vibration, improve the working property of motor simultaneously. In the design process, the design performance targets (the volume size, the current, the voltage and the like of the motor) are combined, and the iron core length, the rotor outer diameter and the magnetic steel of the motor are optimized and calculated by adopting a biological algorithm, so that the structure of the rotor iron core is determined. In the process of mounting the magnetic steel, a special mounting die is adopted to inlay the magnetic steel; after the installation is finished, the rotor end plate is made of 10mm aluminum alloy materials and used for packaging and fixing the rotor magnetic steel.
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 an asynchronous starting PMSM rotor core structure which characterized by: including the rotor punching sheet group that is formed by a plurality of rotor punching sheets (1) coincide and inlay rotor magnet steel (3) of putting on rotor punching sheet (1), rotor punching sheet (1) be the annular, offer damping hole (7) on rotor punching sheet (1), damping hole (7) are located the annular edge, wear to establish damping strip (2) in damping hole (7), damping hole (7) on set up heat dissipation channel (6), heat dissipation channel (6) extend to the outer anchor ring of rotor punching sheet (1), set up curved magnet steel groove (5) on rotor punching sheet (1), embed rotor magnet steel (3) in magnet steel groove (5), rotor magnet steel (3) adopt the mode of magnetizing of Halbach array, set up axial ventilation hole (4) on rotor punching sheet (1).
2. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: the damping strip (2) is made of brass bars.
3. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: the number of the damping holes (7) is 80 which are uniformly distributed on the circumference.
4. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: the number of the magnetic steel grooves (5) is 8, and the magnetic steel grooves are uniformly distributed on the circumference.
5. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: and each pole of the rotor magnetic steel (3) is composed of 11 pieces of magnetic steel.
6. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: the rotor magnetic steel (3) is adhered in the magnetic steel groove (5) through heat-resistant glue.
7. The rotor core structure of the asynchronous permanent magnet synchronous motor as recited in claim 1, wherein: the axial ventilation holes (4) are set to be 8 circumferentially and uniformly distributed.
CN202020961382.5U 2020-05-29 2020-05-29 Rotor core structure of asynchronous starting permanent magnet synchronous motor Active CN212811407U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020961382.5U CN212811407U (en) 2020-05-29 2020-05-29 Rotor core structure of asynchronous starting permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020961382.5U CN212811407U (en) 2020-05-29 2020-05-29 Rotor core structure of asynchronous starting permanent magnet synchronous motor

Publications (1)

Publication Number Publication Date
CN212811407U true CN212811407U (en) 2021-03-26

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CN202020961382.5U Active CN212811407U (en) 2020-05-29 2020-05-29 Rotor core structure of asynchronous starting permanent magnet synchronous motor

Country Status (1)

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CN (1) CN212811407U (en)

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