CN215580573U - Stator punching sheet, stator assembly and motor - Google Patents
Stator punching sheet, stator assembly and motor Download PDFInfo
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- CN215580573U CN215580573U CN202121386785.2U CN202121386785U CN215580573U CN 215580573 U CN215580573 U CN 215580573U CN 202121386785 U CN202121386785 U CN 202121386785U CN 215580573 U CN215580573 U CN 215580573U
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- stator
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- punching sheet
- shaft hole
- rotor shaft
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Abstract
The application provides a stator punching, stator module and motor, including rotor shaft hole and tooth's socket, the quantity of tooth's socket is a plurality of, and is a plurality of the tooth's socket is followed rotor shaft hole's circumference is arranged, the tooth's socket includes notch and tank bottom, the tank bottom is located the notch is kept away from one side in rotor shaft hole, the tank bottom is followed rotor shaft hole circumference's central point is located circle A, and circle A's diameter is D1, the external diameter of stator punching is D, and D1D is 0.758 ~ 0.769. The application provides a pair of stator punching, stator module and motor can improve stator structural strength when guaranteeing motor power and efficiency.
Description
Technical Field
The application belongs to the technical field of motors, and in particular relates to a stator punching sheet, a stator assembly and a motor.
Background
According to the relation of main parameters of the motor
It can be seen that the motor power is proportional to the motor volume. In the existing motor, the power and efficiency of the motor are often improved by increasing the outer diameter of the motor and changing the size of a tooth groove, but only the improvement of the power and efficiency of the motor is concerned in the prior art, and the influence of the change of the size of the tooth groove on the structural strength is not considered, so that the structural strength of the existing stator is poor.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem that this application will be solved lies in providing a stator punching, stator module and motor, when can guaranteeing motor power and efficiency, improves stator structural strength.
In order to solve the problem, the application provides a stator punching sheet, including rotor shaft hole and tooth's socket, the quantity of tooth's socket is a plurality of, and is a plurality of the tooth's socket is followed rotor shaft hole's circumference is arranged, the tooth's socket includes notch and tank bottom, the tank bottom is located the notch is kept away from one side in rotor shaft hole, the tank bottom is followed rotor shaft hole circumference's central point is located circle A, circle A's diameter is D1, the external diameter of stator punching sheet is D, and D1/D is 0.758 ~ 0.769.
Optionally, the groove bottom of the tooth groove extends linearly along the circumferential direction of the rotor shaft hole.
Optionally, the diameter of the circle a is 71 mm-72 mm, and the outer diameter of the stator punching sheet is 93 mm-95 mm.
Optionally, the width of the notch is b, the stator punching sheet includes stator teeth, the tooth space is formed between adjacent stator teeth, the width of the stator teeth is w, and b/w is 0.45-0.55.
Optionally, b is 1.6 mm-1.8 mm, and w is 3.3 mm-3.5 mm.
Optionally, the stator punching sheet includes stator teeth, one end of each stator tooth close to the rotor shaft hole is provided with a pole shoe, the tooth slot is formed between adjacent stator teeth, the slot is formed between two adjacent pole shoes, a transition section is arranged between the inner wall of each stator tooth and the tooth shoe, the radial thickness of the pole shoe along the stator punching sheet is hs0, the radial thickness of the transition section along the stator punching sheet is hs1, the width of the slot is b, and 0.3< (hs0+ hs1)/b < 0.6.
Optionally, hs0+ hs1 is 0.6 ≤ and 0.65.
Optionally, the diameter of the rotor shaft hole is D, and D/D is 0.528-0.545.
Optionally, D is 50 mm-50.5 mm, and D is 93 mm-95 mm.
In another aspect of the present application, a stator assembly is provided, which includes the stator punching sheet as described above.
In another aspect of the present application, an electric machine is provided, including the stator punching sheet as described above.
Advantageous effects
The stator punching sheet, the stator assembly and the motor provided by the embodiment of the utility model can ensure the power and the efficiency of the motor and improve the structural strength of the stator.
Drawings
Fig. 1 is a first structural schematic diagram of a stator lamination according to an embodiment of the present application;
fig. 2 is a second structural schematic diagram of a stator punching sheet according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a stator according to an embodiment of the present application.
The reference numerals are represented as:
1. a rotor shaft hole; 2. a tooth socket; 21. a notch; 22. the bottom of the tank; 3. stator teeth; 4. a pole shoe; 5. a transition section.
Detailed Description
With reference to fig. 1 to 3, according to an embodiment of the present application, a stator punching sheet includes a rotor shaft hole 1 and a plurality of tooth grooves 2, the number of the tooth grooves 2 is plural, the plurality of tooth grooves 2 are arranged along the circumferential direction of the rotor shaft hole 1, the tooth grooves 2 include a notch 21 and a groove bottom 22, the groove bottom 22 is located on one side of the notch 21 away from the rotor shaft hole 1, the groove bottom 22 is located on a circle a along the circumferential central point of the rotor shaft hole 1, the diameter of the circle a is D1, the outer diameter of the stator punching sheet is D, and D1/D is 0.758-0.769. In the prior art, the values of D1/D are all larger than 0.769, the yoke part of the stator is reduced along with the increasing of D1/D, the integral structural strength of the motor is poor, the noise vibration is increased, the area of a tooth groove is increased, the copper consumption is increased, and the material cost of the motor is increased. In the embodiment, the ratio of D1 to D is limited to 0.758-0.769, so that the circuit part of the motor is organically matched with the magnetic circuit part, the motor cost is reduced and the structural strength of the stator is improved while the power and the efficiency of the motor are ensured.
Further, the rotor shaft hole 1 is used for arranging a rotor, and the tooth grooves 2 are used for providing mounting positions for the windings, so that stable arrangement of the rotor and the windings is guaranteed.
Furthermore, the groove bottom 22 of the tooth groove 2 extends linearly along the circumferential direction of the rotor shaft hole 1, namely, the tooth groove 2 is a flat bottom groove, and the stronger structural strength of the stator is further ensured.
TABLE 1
| D(mm) | 92 | 90 | 94 | 94 | 101.1 | 88 |
| d1(mm) | 69.5 | 68 | 71.4 | 72.4 | 78 | 69 |
| d1/D | 0.755 | 0.756 | 0.760 | 0.770 | 0.772 | 0.784 |
| Yoke width (mm) | 11.25 | 11 | 11.3 | 10.8 | 11.55 | 9.5 |
| Tooth width (mm) | 3.3 | 3.2 | 3.4 | 3.4 | 3.14 | 3.1 |
| Notch (mm) | 1.7 | 2 | 1.7 | 1.6 | 2 | 1.6 |
| Groove shoulder (mm) | 0.45+0.2 | 0.65+0.15 | 0.45+0.15 | 0.5+0.15 | 0.5+0.16 | 0.6+0.3 |
| Efficiency (%) | 82.5 | 82.1 | 83.5 | 83.7 | 84 | 82.7 |
| Noise (db) | 52.4 | 53.3 | 52.3 | 53 | 55.6 | 59 |
| Casing vibration m/s 2 | 7.72 | 7.88 | 7.67 | 7.83 | 7.97 | 8.15 |
| Cost of materials (yuan) | 75.8 | 72.9 | 76.3 | 79.2 | 91.4 | 78.8 |
As can be seen from table 1, the motor with the ratio of D1 to D from 0.756 to 0.770 is more efficient, less noisy, less vibration of the housing, and less costly in materials.
Wherein hs0+ hs1 is the groove shoulder.
Specifically, the diameter of the circle A is 71mm to 72 mm. The external diameter 93mm ~ 95mm of stator punching has very big assurance stator structural strength, has improved rotor shaft hole 1's effective area, has reduced the vibration noise of motor, promotes the motor performance.
Preferably, circle A's diameter is 71.4mm, and the external diameter of stator punching 94mm, very big limit guaranteed stator structural strength, improved the effective area of rotor shaft hole 1, reduced the vibration noise of motor, promote the motor performance.
The width of notch 21 is b, and the stator punching includes stator tooth 3, forms tooth's socket 2 between the adjacent stator tooth 3, and the width of stator tooth 3 is w, and b/w equals 0.45 ~ 0.55, can reduce the magnetic flux density of tooth's socket 2 department, reduces to leak , has improved motor efficiency.
Preferably, b/w is 0.5, which can reduce the magnetic flux density at the tooth slot 2 to a large extent, reduce the leakage and improve the motor efficiency.
Further, the shortest distance between adjacent tooth slots 2 is also the width of the stator teeth 3.
Further, the width of the notch 21 is the width of the notch 21 along the circumferential direction of the stator punching sheet.
Specifically, b is 1.6-1.8 mm, w is 3.3-3.5 mm, the magnetic flux density at the tooth socket 2 is obviously reduced, leakage is reduced, and the motor efficiency is improved.
Preferably, b is 1.7mm, w is 3.4mm, the magnetic flux density at the tooth groove 2 is greatly reduced, leakage is reduced, and the motor efficiency is improved.
The stator punching sheet comprises stator teeth 3, pole shoes 4 are arranged at one ends, close to a rotor shaft hole 1, of the stator teeth 3, tooth grooves 2 are formed between the adjacent stator teeth 3, notches 21 are formed between the two adjacent pole shoes 4, transition sections 5 are arranged between the inner walls of the stator teeth 3 and the tooth shoes, the radial thickness of the pole shoes 4 along the stator punching sheet is hs0, the radial thickness of the transition sections 5 along the stator punching sheet is hs1, the width of the notches 21 is b, and the number of the transition sections is 0.3< (hs0+ hs1)/b < 0.6.
Further, the stator teeth 3 are solid parts between the adjacent tooth slots 2, and it can also be understood that there is a space between the adjacent stator teeth 3, forming the tooth slots 2.
Further, the pole shoe 4 is arranged on one side of the stator tooth 3 close to the center of the stator punching sheet and extends along the circumferential direction of the stator punching sheet.
Further, the pole shoes 4 are arranged in one-to-one correspondence with the stator teeth 3.
Further, the stator teeth 3 and the pole pieces 4 on the stator teeth 3 themselves form a substantially T-shaped structure.
Specifically, hs0+ hs1 is more than or equal to 0.6 and less than or equal to 0.65.
Specifically, hs0+ hs1 is the groove shoulder.
The diameter of the rotor shaft hole 1 is D, and the D/D is 0.528-0.545, so that the efficiency of the motor is ensured, and meanwhile, the motor is matched with the rotor, the cast aluminum area of the rotor is increased, the resistance of the rotor is reduced, the rotating speed of the motor is further increased, the output torque of the motor is increased, and the power density of the motor is increased.
Further, D/D is the split ratio.
Specifically, D is 50 mm-50.5 mm, and D is 93 mm-95 mm, when guaranteeing motor efficiency, with the rotor cooperation of looks adaptation, increase the cast aluminium area of rotor, reduced the resistance of rotor, and then improved motor speed, improved motor output torque, increase motor power density.
Preferably, D is 50.2mm and D is 94mm, as shown in Table 1.
TABLE 1
| D(mm) | 91.5 | 90 | 94 | 94 | 94 |
| d(mm) | 46 | 47.5 | 50.2 | 51.2 | 52 |
| Split ratio | 0.503 | 0.528 | 0.534 | 0.545 | 0.553 |
| Maximum torque (n x m) | 3.2 | 3.2 | 4.36 | 4.36 | 4.38 |
| Output power (w) | 480 | 530 | 600 | 605 | 580 |
| Power density | 5.25 | 5.89 | 6.38 | 6.44 | 6.17 |
| Efficiency of the electric machine (%) | 83.2 | 83.5 | 83.8 | 83.6 | 82.3 |
The motor power density is gradually increased along with the increase of the crack ratio, the motor efficiency is higher when the crack ratio is within the range of 0.528-0.545, wherein D is 50.2mm, the maximum torque is 4.36n × m when D is 94mm, namely the crack ratio is 0.534, the output power is 600w, the power density is 6.38, the motor efficiency is maximum, and the motor efficiency is 83.8%.
In another aspect of the present embodiment, a stator assembly is provided, which includes the above stator lamination.
In another aspect of the present embodiment, there is provided an electric motor including the stator punching sheet as described above, in which the volume of the electric motor is reduced by 10%, the noise is reduced by 2db, and the structural strength is more excellent than that of the electric motor in the prior art, in which the inner diameter is 52mm and the outer diameter is 101.4 mm.
According to the stator punching sheet, the stator assembly and the motor provided by the embodiment of the utility model, the structural strength of the stator is improved, and the vibration noise of the motor is reduced. The output torque of the motor is improved, the power density of the motor is increased, the area of a stator groove is increased, the number of effective turns of the stator is increased, and the performance of the motor is integrally improved.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (11)
1. The utility model provides a stator punching sheet, its characterized in that, includes rotor shaft hole (1) and tooth's socket (2), the quantity of tooth's socket (2) is a plurality of, and is a plurality of tooth's socket (2) are followed the circumference of rotor shaft hole (1) is arranged, tooth's socket (2) are including notch (21) and tank bottom (22), tank bottom (22) are located notch (21) are kept away from one side of rotor shaft hole (1), tank bottom (22) are followed the central point of rotor shaft hole (1) circumference is located circle A, circle A's diameter is D1, the external diameter of stator punching sheet is D, and D1/D is 0.758 ~ 0.769.
2. The stator punching sheet according to claim 1, wherein the groove bottom (22) of the tooth groove (2) extends linearly in the circumferential direction of the rotor shaft hole (1).
3. The stator punching sheet according to claim 1, wherein the diameter of the circle A is 71-72 mm, and the outer diameter of the stator punching sheet is 93-95 mm.
4. The stator punching sheet according to claim 1, wherein the width of the slot opening (21) is b, the stator punching sheet comprises stator teeth (3), the tooth slot (2) is formed between the adjacent stator teeth (3), and the width of the stator teeth (3) is w, wherein b/w is 0.45-0.55.
5. The stator lamination as recited in claim 4, wherein b is 1.6mm to 1.8mm, and w is 3.3mm to 3.5 mm.
6. The stator punching sheet according to claim 1, wherein the stator punching sheet comprises stator teeth (3), one end of each stator tooth (3) close to the rotor shaft hole (1) is provided with a pole shoe (4), the tooth slot (2) is formed between every two adjacent stator teeth (3), the slot opening (21) is formed between every two adjacent pole shoes (4), a transition section (5) is arranged between the inner wall of each stator tooth (3) and the tooth shoe, the thickness of each pole shoe (4) along the radial direction of the stator punching sheet is hs0, the thickness of each transition section (5) along the radial direction of the stator punching sheet is hs1, and the width of each slot opening (21) is b, 0.3< (hs0+ hs1)/b < 0.6.
7. The stator lamination according to claim 6, wherein hs0+ hs1 is 0.6 ≤ and 0.65.
8. The stator punching sheet according to claim 1, wherein the diameter of the rotor shaft hole (1) is D, and D/D is 0.528-0.545.
9. The stator lamination as recited in claim 8, wherein D is 50mm to 50.5mm, and D is 93mm to 95 mm.
10. A stator assembly, characterized by comprising a stator lamination as claimed in any one of claims 1-9.
11. An electric machine comprising a stator lamination as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121386785.2U CN215580573U (en) | 2021-06-21 | 2021-06-21 | Stator punching sheet, stator assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121386785.2U CN215580573U (en) | 2021-06-21 | 2021-06-21 | Stator punching sheet, stator assembly and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215580573U true CN215580573U (en) | 2022-01-18 |
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ID=79819336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121386785.2U Active CN215580573U (en) | 2021-06-21 | 2021-06-21 | Stator punching sheet, stator assembly and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215580573U (en) |
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2021
- 2021-06-21 CN CN202121386785.2U patent/CN215580573U/en active Active
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