CN217984700U

CN217984700U - Rotor punching sheet and stator punching sheet applied to permanent magnet synchronous motor

Info

Publication number: CN217984700U
Application number: CN202221403988.2U
Authority: CN
Inventors: 王国俊; 李小平
Original assignee: Changzhou Jintan Weite Motor Co ltd
Current assignee: Changzhou Jintan Weite Motor Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-12-06
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a rotor punching sheet and a stator punching sheet applied to a permanent magnet synchronous motor, which relate to the technical field of permanent magnet synchronous motors and comprise a rotor punching sheet, a shaft hole positioned in the center of the rotor punching sheet and magnet grooves distributed along the circumferential direction of the rotor punching sheet, wherein the left end and the right end of each magnet groove are respectively provided with a magnetism isolating hole, a magnetism isolating bridge is arranged between the magnetism isolating holes and the outer circumferential edge of the rotor punching sheet, and ventilation holes uniformly distributed are also arranged between the shaft hole and the magnet grooves; the stator punching sheet is characterized by further comprising a stator punching sheet, a stator middle hole located in the stator punching sheet and T-shaped teeth which are evenly distributed along the circumference of the stator middle hole, tooth grooves are further formed between the T-shaped teeth, and the bottom of each tooth groove is semicircular. The utility model provides an on the basis that improves motor output torque, effectively improve air gap magnetic field sine degree, reduce the harmonic, weaken motor torque pulsation, and high efficiency, low electromagnetic noise, the little high performance PMSM of vibration is with towards piece and iron core.

Description

Rotor punching sheet and stator punching sheet applied to permanent magnet synchronous motor

Technical Field

The utility model relates to the technical field of electric machines, especially permanent magnet synchronous motor.

Background

The permanent magnet synchronous motor provides excitation by the permanent magnet, so that the structure of the motor is simpler, the processing and assembling cost is reduced, a collecting ring and an electric brush which are easy to cause problems are omitted, and the running reliability of the motor is improved; and because excitation current is not needed, excitation loss is avoided, and the efficiency and the power density of the motor are improved. The permanent magnet synchronous motor is composed of a stator, a rotor, an end cover and the like. The stator adopts a lamination structure to reduce iron loss during the operation of the motor. The rotor can be made into solid or laminated by lamination.

The rotor punching sheet and the stator punching sheet are used as key components of a rotor and a stator of the permanent magnet synchronous motor, the performance of the motor is directly determined by the quality of the design of the rotor punching sheet and the stator punching sheet, and if the design of the rotor punching sheet and the stator punching sheet is unreasonable, the power density, the torque pulsation, the highest rotating speed and the vibration noise of the motor can be influenced. Therefore, the rotor punching sheet and the stator punching sheet are designed more reasonably to improve the performance of the motor to become the main technical problem at present.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a following technical scheme:

the utility model provides an use rotor punching on PMSM, including the rotor punching, be located the central shaft hole of rotor punching and the magnet groove that distributes along rotor punching circumference, both ends all are equipped with at a distance from the magnetism hole about the magnet groove, it separates magnetism bridge and width and be H1=2mm to be equipped with between the outer disc limit of magnetism hole and rotor punching, the left and right sides both sides of separating magnetism hole divide into about hypotenuse on upper portion and the right and left straight flange of lower part, the contained angle of controlling the hypotenuse is alpha and satisfies: 50 DEG < alpha < 55 DEG, the right and left straight sides have a height H2 and H2= H1=2mm, the magnet slot has a top side width L1 and a bottom side width L2, and the following conditions are satisfied: l1 is more than or equal to 35mm and more than L2 and less than 40mm, the distance between the top edge and the bottom edge of the magnet groove is H3 and satisfies the following conditions: h3=4 H2, the outer diameter of the rotor punching sheet is 167.95 mm-168 mm, and the diameter of the shaft hole is 100.02 mm-100.07 mm.

Furthermore, still be equipped with evenly distributed's ventilation hole between shaft hole and the magnet groove, ventilation hole and magnet groove are located same symmetry axis.

Further, still be provided with rivet hole one between two adjacent ventilation holes, rivet hole one is 10, the distance of ventilation hole to axle center is greater than rivet hole one by 0.5mm.

Furthermore, the shaft hole is transversely provided with symmetrical key grooves, the shaft hole is also provided with inner welding openings which are uniformly distributed, the inner welding openings are W-shaped, and the included angle between the key grooves and the symmetrical axis of the inner welding openings is 36 degrees.

The utility model discloses a second aspect provides an use stator punching on PMSM, by the rotor punching fold the rotor core that the pressure formed can with fold the stator core cooperation that the pressure formed by the stator punching and use, the stator core can be established to the cover outward, including stator punching on the stator mesopore and along stator mesopore circumference evenly distributed's T type tooth, the external diameter of stator punching is between 260.17mm to 260.22mm, and the mesopore diameter of stator is between 169.6mm to 169.65mm, T type tooth width is between 4.95mm to 5.05mm, the addendum interval of T type tooth is 2.2mm, the quantity of T type tooth is 60.

Further, still be equipped with the tooth's socket between the T type tooth, the tooth's socket bottom is semi-circular, and the radius is 3.38mm, the distance of tooth's socket bottom to top is 31mm.

Further, be equipped with 4 evenly distributed's outer keyway and 8 symmetric distribution's outer weld bond on the stator punching excircle edge respectively, the symmetry axis contained angle of outer keyway and outer weld bond is 24, outer weld bond is the W type, the symmetry axis contained angle of outer keyway and adjacent tooth's socket is 3.

Further, 12 rivet holes II are evenly formed between the T-shaped teeth and the outer circular edge of the stator punching sheet, the included angle between each rivet hole II and the symmetrical axis of the adjacent outer key groove is 12 degrees, the distance between each rivet hole II and the outer circular edge of the stator punching sheet is 6mm, mark openings are further formed in the outer circular edge of the stator punching sheet, and the included angle between each mark opening and the symmetrical axis of the outer key groove is 54 degrees.

Further, the size of an air gap between the stator punching sheet and the rotor punching sheet is 0.8 mm-0.85 mm.

The utility model has the advantages that: the punching sheet and the iron core for the high-performance permanent magnet synchronous motor are provided, on the basis of improving the output torque of the motor, the sine degree of an air gap magnetic field is effectively improved, harmonic waves are reduced, the torque pulsation of the motor is weakened, the assembly is convenient, the efficiency is high, the electromagnetic noise is low, and the vibration is small.

Drawings

Fig. 1 is a schematic diagram of the stator and rotor of the present invention.

Fig. 2 is the structure diagram of the rotor sheet of the present invention.

Fig. 3 is a schematic diagram of the magnet slot structure according to the present invention.

Fig. 4 is the utility model discloses a stator punching sheet structure schematic diagram.

In FIGS. 1-4: 10. rotor punching sheets; 11. a magnet slot; 12. a magnetism isolating hole; 13. a permanent magnet; 14. a rivet hole I; 15. a vent hole; 16. an inner keyway; 17. an inner crater; 18. a shaft hole; 19. a magnetic isolation bridge; 20. stator punching; a stator center hole; t-shaped teeth; 23. an outer weld crater; 24. an outer keyway; 25. a marking port; 26. a rivet hole II; a gullet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.

As shown in fig. 2-3, the utility model provides an use rotor punching on PMSM, including rotor punching 10, be located the rotor punching 10 in the shaft hole 18 and along the magnet groove 11 of rotor punching 10 circumference distribution, both ends all are equipped with at a distance from magnetism hole 12 about magnet groove 11, it separates magnetism bridge 19 and width for H1=2mm to be equipped with between the outer disc edge of magnetism hole 12 and rotor punching 10 to separate magnetism hole, it is divided into about hypotenuse and the left and right sides straight flange of lower part on upper portion to separate both sides about magnetism hole 12, the contained angle of controlling the hypotenuse is alpha and satisfies: 50 DEG < alpha < 55 DEG, the height of the left and right straight edges is H2 and H2= H1, the width of the top edge of the magnet slot 11 is L1, the width of the bottom edge is L2, and the following conditions are satisfied: l1 is more than or equal to 35mm and more than or equal to L2 and less than 40mm, the distance between the top edge and the bottom edge of the magnet groove 11 is H3 and satisfies the following conditions: h3=4 × H2, the outer diameter of the rotor sheet 10 is 167.95mm to 168mm, and the diameter of the shaft hole 18 is 100.02mm to 100.07 mm. The size of the magnet slot 11 is set in this way, so that the installation area of the permanent magnet can be larger, and higher magnetic flux can be obtained; the magnetic leakage of the permanent magnet can be reduced by arranging the magnetic isolation holes 12, and the penetration of harmonic waves to the permanent magnet is reduced, so that the permanent magnet is not easy to demagnetize, the sine degree of an air gap magnetic field is effectively improved, the harmonic waves are reduced, and the problem of vibration noise is solved; the sine degree of air gap flux density can be optimized and the cogging torque can be reduced by arranging the magnetic isolation bridge 19; the rotor punching sheet 10 is sized to further optimize the motor air gap flux.

As shown in fig. 2, ventilation holes 15 are uniformly distributed between the shaft hole 18 and the magnet slot 11, and the ventilation holes 15 and the magnet slot 11 are located on the same symmetry axis. The heat dissipation ability of rotor punching can be strengthened to so setting, effectively prevents that the permanent magnet from taking place the demagnetization because of overheated.

As shown in fig. 2, a first rivet hole 14 is further disposed between two adjacent vent holes 15, the number of the first rivet holes 14 is 10, and the distance from the vent hole 15 to the axis is 0.5mm greater than that of the first rivet hole 14. The rotor core is convenient to assemble and position accurately, and the working efficiency of personnel is improved.

As shown in fig. 2, symmetrical key slots 16 are transversely arranged on the shaft hole 18, inner welding openings 17 are uniformly distributed on the shaft hole 18, the inner welding openings 17 are W-shaped, and an included angle between the key slots 16 and the symmetrical axis of the inner welding openings 17 is 36 °. The crater sets up and to help the location, has the structural strength that can strengthen rotor core through the welding, guarantees that the iron core is steady operation under high rotational speed.

As shown in fig. 4, the utility model also provides an use stator punching on PMSM, by rotor punching 10 fold the rotor core who presses formation can use with the stator core cooperation that is folded by stator punching 20 and presses formation, the stator core can overlap outward and establish stator core, stator mesopore 21 on the stator punching 20 and the T type tooth 22 along stator mesopore 21 circumference evenly distributed, the external diameter of stator punching 20 is between 260.17mm to 260.22mm, and the diameter of stator mesopore 21 is between 169.6mm to 169.65mm, T type tooth 22 width is between 4.95mm to 5.05mm, the addendum interval of T type tooth 22 is 2.2mm, the quantity of T type tooth 22 is 60.

The T-shaped teeth 22 are arranged, so that the magnetic densities of the tooth part and the yoke part of the stator punching sheet are more balanced, the electromagnetic noise of the motor is reduced, and the efficiency of the motor is improved; in addition, the width of the stator punching sheet ring is reduced, the utilization rate of the tooth area of the punching sheet is improved, the magnetic leakage coefficient and the temperature rise of the motor are reduced, and the service life of the motor is prolonged.

As shown in fig. 4, a tooth socket 27 is further arranged between the T-shaped teeth 22, the bottom of the tooth socket 27 is semicircular, the radius of the tooth socket 27 is 3.38mm, and the distance from the bottom to the top of the tooth socket 27 is 31mm.

The arrangement of the tooth grooves 27 reduces the tooth groove torque, so that the vibration and noise of the motor are reduced, the rotation speed fluctuation is not easy to occur, the motor runs more stably, and the performance of the motor is improved; the more slots can reduce the harmonic amplitude in the no-load air gap flux density, improve the output torque of the motor and reduce the torque pulsation of the motor; the semicircular tooth groove bottom is arranged, winding inserting is more convenient, and the heat dissipation area of the iron core at the winding is increased, so that heat dissipation is facilitated.

As shown in fig. 4, the outer circumference of the stator punching sheet 20 is respectively provided with 4 uniformly distributed outer key slots 24 and 8 symmetrically distributed outer welding openings 23, the included angle between the symmetric axis of the outer key slots 24 and the symmetric axis of the outer welding openings 23 is 24 °, the outer welding openings 23 are W-shaped, and the included angle between the symmetric axis of the outer key slots 24 and the symmetric axis of the adjacent tooth slots 27 is 3 °. Outer keyway 24 set up convenient stator core and motor casing installation fixed, set up outer weld bond 23 and be the W type, can improve stator core's structural strength, fix a position when easy to assemble simultaneously.

As shown in fig. 4, 12 rivet holes two 26 are further evenly arranged between the T-shaped teeth 22 and the outer circular edge of the stator punching sheet 20, the included angle between the rivet holes two 26 and the symmetric axis of the adjacent outer key groove 24 is 12 °, the distance between the rivet holes two 26 and the outer circular edge of the stator punching sheet 20 is 6mm, a mark opening 25 is further arranged on the outer circular edge of the stator punching sheet 20, and the included angle between the mark opening 25 and the symmetric axis of the outer key groove 24 is 54 °. The rivet holes 26 and the outer welding openings 23 are arranged in a staggered mode, so that the stress is more uniform when the stator punching sheets are laminated into the iron core, and the deformation is prevented; the mark openings 25 are mainly convenient for positioning the stator punching sheets during lamination.

As shown in fig. 1, the size of the air gap between the stator lamination 20 and the rotor lamination 10 is 0.8mm to 0.85 mm. The arrangement is to improve the power factor of the motor, reduce the air gap harmonic magnetic field, reduce the stray loss and noise of the motor and improve the maximum torque and the starting torque.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "top", "bottom", "lateral", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an use rotor punching on PMSM, includes rotor punching (10), is located the central shaft hole (18) of rotor punching (10) and follows magnet groove (11) that rotor punching (10) circumference distributes, a serial communication port, both ends all are equipped with at a distance from magnetism hole (12) about magnet groove (11), it separates magnetism bridge (19) and width and be H1=2mm to separate to be equipped with between the outer disc limit of magnetism hole (12) and rotor punching (10), separate the left and right sides both sides of magnetism hole (12) and divide into the left and right sides straight flange of the hypotenuse of the left and right sides hypotenuse and lower part on upper portion, the contained angle of controlling the hypotenuse is alpha and satisfies: 50 DEG < alpha < 55 DEG, the height of the left and right straight edges is H2 and H2= H1=2mm, the width of the top edge of the magnet slot (11) is L1, the width of the bottom edge is L2, and the following conditions are satisfied: l1 is more than or equal to 35mm and more than L2 and less than 40mm, the distance between the top edge and the bottom edge of the magnet groove (11) is H3 and satisfies the following conditions: h3=4 H2, the outer diameter of the rotor punching sheet (10) is 167.95 mm-168 mm, and the diameter of the shaft hole (18) is 100.02 mm-100.07 mm.

2. The rotor punching sheet applied to the permanent magnet synchronous motor according to claim 1, wherein ventilation holes (15) are uniformly distributed between the shaft hole (18) and the magnet groove (11), and the ventilation holes (15) and the magnet groove (11) are located on the same symmetry axis.

3. The rotor punching sheet applied to the permanent magnet synchronous motor according to claim 2, wherein a first rivet hole (14) is further arranged between two adjacent vent holes (15), the number of the first rivet holes (14) is 10, and the distance from the vent hole (15) to the axis is 0.5mm greater than that of the first rivet hole (14).

4. The rotor sheet applied to the permanent magnet synchronous motor according to claim 1, wherein symmetrical key grooves (16) are transversely arranged on the shaft hole (18), inner weld joints (17) are uniformly distributed on the shaft hole (18), the inner weld joints (17) are W-shaped, and an included angle between the key grooves (16) and the inner weld joints (17) is 36 degrees.

5. The utility model provides an use stator punching sheet on permanent magnet synchronous motor, the rotor core that is folded by rotor punching sheet (10) of claim 1 and is formed can use with the stator core cooperation that is folded by stator punching sheet (20) and is formed, and the stator core can be established to the cover outside the rotor core, its characterized in that includes stator mesopore (21) on stator punching sheet (20) and along stator mesopore (21) circumference evenly distributed's T type tooth (22), the external diameter of stator punching sheet (20) is between 260.17mm to 260.22mm, and the diameter of stator mesopore (21) is between 169.6mm to 169.65mm, T type tooth (22) width is between 4.95mm to 5.05mm, the addendum interval of T type tooth (22) is 2.2mm, the quantity of T type tooth (22) is 60.

6. The stator punching sheet applied to the permanent magnet synchronous motor according to claim 5, wherein a tooth slot (27) is further arranged between the T-shaped teeth (22), the bottom of the tooth slot (27) is semicircular, the radius of the tooth slot (27) is 3.38mm, and the distance from the bottom to the top of the tooth slot (27) is 31mm.

7. The stator punching sheet applied to the permanent magnet synchronous motor according to claim 5, wherein the outer circle edge of the stator punching sheet (20) is respectively provided with 4 outer key grooves (24) which are uniformly distributed and 8 outer welding openings (23) which are symmetrically distributed, the included angle between the outer key grooves (24) and the symmetry axis of the outer welding openings (23) is 24 degrees, the outer welding openings (23) are W-shaped, and the included angle between the outer key grooves (24) and the symmetry axis of the adjacent tooth grooves (27) is 3 degrees.

8. The stator punching sheet applied to the permanent magnet synchronous motor according to claim 5, wherein 12 rivet holes II (26) are uniformly arranged between the T-shaped teeth (22) and the outer circular edge of the stator punching sheet (20), the included angle between each rivet hole II (26) and the symmetrical axis of the adjacent outer key groove (24) is 12 degrees, the distance between each rivet hole II (26) and the outer circular edge of the stator punching sheet (20) is 6mm, a mark opening (25) is further arranged on the outer circular edge of the stator punching sheet (20), and the included angle between each mark opening (25) and the symmetrical axis of the outer key groove (24) is 54 degrees.

9. The stator punching sheet applied to the permanent magnet synchronous motor according to claim 5, wherein the size of an air gap between the stator punching sheet (20) and the rotor punching sheet (10) is 0.8mm to 0.85 mm.