CN212649202U

CN212649202U - Embedded rotor structure applied to permanent magnet synchronous motor

Info

Publication number: CN212649202U
Application number: CN202021591980.4U
Authority: CN
Inventors: 吴凯洋; 陈益民; 沃增勇
Original assignee: Hangzhou Sav Mechanical And Electrical Technology Co ltd
Current assignee: Hangzhou Sav Mechanical And Electrical Technology Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-02
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a be applied to PMSM's embedded rotor structure relates to the permanent-magnet machine field, include the rotor body that is folded to press and forms by the iron core towards the piece, seted up the shaft hole on this rotor body, have a plurality of fastening stud holes to be used for inserting stud along this shaft hole periphery equipartition, have a plurality ofly to the cell body along rotor body circumference equipartition and be used for putting into the permanent magnet, every forms opening "V" font structure outwards between every to the cell body, and the opening inboard of each "V" font structure is all opened and is separated the magnetism hole. The utility model has the advantages that: the cogging torque can be effectively weakened, the waveform of the counter electromotive force is optimized, the torque pulsation is reduced, the vibration and the electromagnetic noise of the motor during working are reduced, and the working performance of the motor is improved.

Description

Embedded rotor structure applied to permanent magnet synchronous motor

Technical Field

The utility model relates to a permanent-magnet machine's field, concretely relates to be applied to PMSM's embedded rotor structure.

Background

In recent years, with the advent of high-performance permanent magnet materials, the permanent magnet motor industry has come to a high-speed development opportunity, and more permanent magnet motors are applied to various industries. Especially, the permanent magnet motor with an embedded rotor structure is widely applied to the mechanical industries of air compressors, electric automobiles, wire drawing machines and the like, textile industries of textile machines, melt-blown fabrics and the like due to the advantages of small volume, high efficiency, stable performance and the like.

However, the embedded rotor structure adopted by the existing permanent magnet motor has the inherent problem of cogging torque, so that the pulsation of output torque is too large, and the control precision of the motor is influenced. Therefore, how to solve the problem of cogging torque at low cost and effectively becomes a problem which needs to be solved urgently by those in the field at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide an embedded rotor structure for PMSM, have simple structure, low cost's advantage, be applicable to miniwatt PMSM.

The purpose of the utility model is accomplished through following technical scheme: this kind of be applied to PMSM's embedded rotor structure, include the rotor body that is folded to fold by the iron core towards the piece and forms, seted up the shaft hole on this rotor body, have a plurality of fastening stud holes along this shaft hole periphery equipartition and be used for inserting stud, have a plurality ofly to the cell body along rotor body circumference equipartition and be used for putting into the permanent magnet, every forms "V" font structure that the opening is outwards to between every to the cell body, and the opening inboard of each "V" font structure all opens and has separated the magnetism hole.

As a preferable technical scheme, the magnetic isolation holes are arranged on the symmetrical line of each pair of the groove bodies and are positioned below the magnetic flux peak line.

As a preferred technical scheme, the fastening stud hole is positioned between two adjacent pairs of groove bodies.

As a preferable technical scheme, the number of the groove bodies is 6, the number of the magnetic isolation holes is 6, and the number of the fastening stud holes is 6.

The utility model has the advantages that: the cogging torque can be effectively weakened, the waveform of the counter electromotive force is optimized, the torque pulsation is reduced, the vibration and the electromagnetic noise of the motor during working are reduced, and the working performance of the motor is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of a single-pole iron core punching sheet on a rotor body.

Fig. 3 is a waveform diagram of back electromotive force of the permanent magnet motor adopting the structure of the utility model.

Fig. 4 is a waveform diagram of back electromotive force of a conventional permanent magnet motor.

Fig. 5 is a cogging torque waveform diagram of a permanent magnet motor adopting the structure of the present invention.

Fig. 6 is a cogging torque waveform diagram of a conventional permanent magnet motor.

Description of reference numerals: rotor body 1, cell body 2, fastening stud hole 3, separate magnetic hole 4, shaft hole 5.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawing 1, the embedded rotor structure applied to the permanent magnet synchronous motor comprises a rotor body 1 formed by laminating iron core laminations, wherein a shaft hole 5 is formed in the center of the

rotor body

1, 6 fastening stud holes 3 are uniformly distributed along the periphery of the shaft hole 5 and used for inserting a stud, 6 pairs of groove bodies 2 are uniformly distributed along the circumference of the rotor body 1 and used for placing a permanent magnet, a V-shaped structure with an outward opening is formed between each pair of groove bodies 2, a magnetism isolating hole 4 is formed in the inner side of the opening of each V-shaped structure, and the magnetism isolating hole 4 is arranged on a symmetrical line of each pair of groove bodies 2 and is positioned below a magnetic flux peak line; the fastening stud hole 3 is positioned between two adjacent pairs of the groove bodies 2.

The utility model provides a scheme, need not the axle to required installation, outside motor stator structure and embedded magnet steel change, only on every the symmetrical line to the cell body, a round hole (separate the magnetism hole promptly) is seted up to the below of magnetic flux peak line, the specification of this round hole, accurate position can be optimized according to the simulation, alright effectual weakening tooth's socket torque, optimize the counter electromotive force waveform, reduce torque ripple (as shown in figure 3 ~ 6), and then reduce vibration and the electromagnetic noise of motor during operation, promote the working property of the motor that uses this rotor structure.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. The utility model provides an embedded rotor structure for PMSM which characterized in that: including laminating rotor body (1) that forms by the iron core towards the piece, shaft hole (5) have been seted up on this rotor body (1), have a plurality of fastening stud holes (3) along this shaft hole (5) periphery equipartition and be used for inserting stud, have a plurality ofly to cell body (2) along rotor body (1) circumference equipartition and be used for putting into the permanent magnet, every forms opening "V" font structure outwards between cell body (2), the opening inboard of each "V" font structure all opens and has separated magnetic hole (4).

2. The in-line rotor structure applied to the permanent magnet synchronous motor according to claim 1, wherein: the magnetism isolating holes (4) are arranged on the symmetrical line of each pair of the groove bodies (2) and are positioned below the magnetic flux peak line.

3. The in-line rotor structure applied to the permanent magnet synchronous motor according to claim 1, wherein: the fastening stud hole (3) is positioned between two adjacent pairs of groove bodies (2).

4. The in-line rotor structure applied to the permanent magnet synchronous motor according to claim 1, wherein: the number of the groove bodies (2) is 6, the number of the magnetism isolating holes (4) is 6, and the number of the fastening stud holes (3) is 6.