CN214506682U

CN214506682U - Stator punching sheet, motor, compressor and household appliance

Info

Publication number: CN214506682U
Application number: CN202120149337.4U
Authority: CN
Inventors: 王进; 黄刚; 倪方雷; 徐浩; 张莹; 王诚诚
Original assignee: Anhui Meizhi Compressor Co Ltd
Current assignee: Anhui Meizhi Compressor Co Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-10-26
Anticipated expiration: 2031-01-19

Abstract

The utility model provides a stator punching sheet, and use motor, compressor, domestic appliance of stator punching sheet. The utility model provides a stator punching sheet, the stator punching sheet comprises a yoke part, a plurality of stator teeth and a rotor hole, wherein the yoke part is arranged in an annular shape; the plurality of stator teeth are arranged at intervals along the inner periphery of the yoke part and comprise tooth bodies and tooth crowns, one ends of the tooth bodies are connected with the yoke part, and the other ends of the tooth bodies are connected with the tooth crowns; the rotor hole and the yoke part have the same circle center, and an arc coincident with the edge of the rotor hole is formed on one side, away from the yoke part, of the tooth crown; the width of the tooth body is K1, the width of the yoke part is K2, wherein K1/K2 is not less than 1, and K1/K2 is not more than 1.1. So, the lower problem of stator punching sheet slot fullness among the prior art has been solved.

Description

Stator punching sheet, motor, compressor and household appliance

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to a stator punching sheet, and use motor, compressor and domestic appliance of stator punching sheet.

Background

With the progress of technology, people put higher demands on the high efficiency and miniaturization of the motor and the compressor and the household appliance using the motor. The motor is difficult to miniaturize, and is mainly caused by the fact that the slot filling rate of the stator punching sheet in the prior art is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a stator punching sheet, and use motor, compressor and domestic appliance of stator punching sheet aim at solving the lower problem of stator punching sheet groove fullness rate among the prior art.

In order to solve the problems, the utility model provides a stator punching sheet, which comprises a yoke part, a plurality of stator teeth and a rotor hole, wherein the yoke part is arranged in an annular shape; the plurality of stator teeth are arranged at intervals along the inner periphery of the yoke part and comprise tooth bodies and tooth crowns, one ends of the tooth bodies are connected with the yoke part, and the other ends of the tooth bodies are connected with the tooth crowns; the rotor hole and the yoke part have the same circle center, and an arc coincident with the edge of the rotor hole is formed on one side, away from the yoke part, of the tooth crown; the width of the tooth body is K1, the width of the yoke part is K2, wherein K1/K2 is not less than 1, and K1/K2 is not more than 1.1.

In one embodiment, the distance from one end of the tooth crown in the circumferential direction of the rotor hole to the tooth body is K3, wherein K1/K3 is not less than 0.9, and K1/K3 is not more than 1.1.

In one embodiment, the radius of the rotor bore is R1, the radius of the outer circumference of the yoke is R2, wherein R1/R2 is not less than 0.6, and R1/R2 is not more than 0.65.

In an embodiment, the stator punching sheet further comprises a fixing portion, the fixing portion surrounds the periphery of the yoke portion, so that the stator punching sheet is arranged in a rectangular shape, the length of the stator punching sheet is L1, the width of the stator punching sheet is W1, L1/W1 is not less than 1, and L1/W1 is not more than 1.1.

In an embodiment, the fixing portion is provided with a fixing hole, the radius of the fixing hole is R3, R3 is not less than 2mm, and R3 is not more than 3mm, the distance from the center of the fixing hole to the outer edge of the stator punching sheet is D1, wherein D1 is not less than 4.2mm, and D1 is not more than 4.8 mm.

The utility model also provides a motor, the motor includes the stator towards the piece, the motor still includes the rotor punching, and is a plurality of the stator is overlapped along the axial of pivot towards the piece and is formed the stator, and is a plurality of the rotor is overlapped along the axial of pivot towards the piece and is formed the rotor, the rotor set up in the rotor is downthehole.

In one embodiment, a rotating shaft hole is formed in the inner periphery of the rotor sheet, a plurality of protruding portions are formed in the outer periphery of the rotor sheet, the protruding portions are arranged along the outer periphery of the rotor sheet at equal intervals, and a permanent magnet groove is formed between every two adjacent protruding portions.

In an embodiment, the rotor punching sheet is further provided with a plurality of mounting holes, the centers of the plurality of mounting holes are located on the circumference of the same concentric circle of the rotating shaft hole, the radius of the concentric circle where the plurality of mounting holes are located is R4, R4 is not smaller than 13mm, and R4 is not larger than 13.5 mm.

In an embodiment, the motor further includes a permanent magnet, the permanent magnet is installed in the permanent magnet slot, the radian of the circumference corresponding to the permanent magnet slot is β 1, the radian of the circumference corresponding to the permanent magnet after installation is β 2, and the difference between β 1 and β 2 is not less than 1 °.

In one embodiment, the pole arc coefficient of the permanent magnet is not less than 0.83 and not more than 0.85, and four corners of the permanent magnet are provided with chamfers.

The utility model discloses still provide a compressor, the compressor includes the motor.

The utility model also provides a domestic appliance, domestic appliance includes the compressor.

The utility model discloses a stator is towards piece and application motor, compressor, domestic appliance of stator towards piece is provided. Specifically, the structure of the stator punching sheet is improved, so that the groove filling rate of the stator punching sheet is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the motor of the present invention;

fig. 2 is a schematic structural diagram of the stator lamination in fig. 1;

FIG. 3 is a schematic structural diagram of the rotor sheet shown in FIG. 1;

fig. 4 is a schematic structural view of the permanent magnet in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Electric machine	10	Stator punching sheet
11	Yoke part	12	Stator tooth
				121	Tooth body	122	Tooth crown
13	Stator slot	14	Fixing part
				141	Fixing hole	20	Rotor punching sheet
21	Mounting hole	22	Raised part
				23	Permanent magnet slot	30	Permanent magnet

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 2, in order to solve the above problem, the present invention provides a stator lamination 10, where the stator lamination 10 includes a yoke portion 11 and a plurality of stator teeth 12, and the yoke portion 11 is annularly disposed; the plurality of stator teeth 12 are arranged along the inner circumference of the yoke 11 at intervals, the stator teeth 12 include a tooth body 121 and a tooth crown 122, one end of the tooth body 121 is connected to the yoke 11, and the other end is connected to the tooth crown 122. Further, a stator slot 13 is formed between two adjacent stator teeth 12. Stator slots 13 are used to house windings and other insulation structures of electric machine 100. However, some motors 100, such as permanent magnet brushless dc motor 100, have thicker windings, which places higher demands on the slot area. Therefore, the utility model provides a technical scheme can promote groove area utilization, improves the full rate of groove promptly. The winding and other components can be accommodated in less space, so that the size of the stator punching sheet 10 is reduced, and the size of a motor 100, a compressor and a household appliance using the stator punching sheet 10 is reduced.

Referring to fig. 1, in an embodiment, the stator lamination 10 is further provided with a rotor hole, the rotor hole and the yoke 11 have the same center, and an arc coinciding with an edge of the rotor hole is formed on one side of the crown 122 away from the yoke 11. In another embodiment, the crown 122 may also be machined so that only a portion of the crown 122 coincides with the circumference of the rotor bore. This is provided to reduce torque ripple and loss of the motor 100.

Referring to fig. 2, in an embodiment, the width of the tooth body 121 is K1, and the width of the yoke 11 is K2, wherein K1/K2 is not less than 1, and K1/K2 is not more than 1.1. The mechanical strength of the stator punching sheet 10 can be further improved, the loss of an iron core in the operation process is reduced, the groove area utilization rate of the stator teeth 12 is improved, namely the groove fullness rate is improved, and the miniaturization arrangement of the stator punching sheet 10 is facilitated.

Referring to fig. 2, in an embodiment, a distance from one end of the crown 122 in the circumferential direction of the rotor hole to the tooth body 121 is K3, wherein K1/K3 is not less than 0.9, and K1/K3 is not more than 1.1. Specifically, the tooth crowns 122 of two adjacent stator teeth 12 are not in contact with each other, and the stator slot 13 formed between the adjacent tooth crowns 122 has a notch, i.e., a gap between the adjacent tooth crowns 122. If the slot opening of the stator slot 13 is too large, a magnetic leakage phenomenon may occur. After a plurality of tests, the inventor finds that when K1/K3 is not less than 0.9 and K1/K3 is not more than 1.1, the width of the notch can reduce the magnetic leakage to the maximum after the requirement of normal operation of the motor 100 is met.

Referring to fig. 1 to 2, in an embodiment, a radius of an outer circumference of the yoke 11 is R2, a radius of the rotor hole is R1, wherein R1/R2 is not less than 0.6, and R1/R2 is not more than 0.65. So set up and can effectually improve stator punching 10 and include the mechanical strength of the motor 100 of stator punching 10 has reduced the magnetic saturation degree of the stator core that stator punching 10 constitutes to reduce the iron core loss when motor 100 moves, promote the slot area of stator slot 13 and the utilization ratio of stator slot 13 simultaneously.

Referring to fig. 1 to 2, in an embodiment, a stator slot 13 is formed between two adjacent stator teeth 12, and four corners of the stator slot 13 are disposed in an arc shape. With such an arrangement, the mechanical strength of the end of the tooth body 121 connected to the yoke 11 can be ensured, and the slot area utilization rate of the stator slot 13 can be improved. Further, the bottom of the stator slot 13 is arranged in an arc shape, and the arc is overlapped with the inner circumference of the forehead, so that the magnetic force distribution during the operation of the motor 100 is facilitated.

Referring to fig. 2, in an embodiment, the stator lamination 10 further includes a fixing portion 14, the fixing portion 14 surrounds the outer periphery of the yoke portion 11, so that the stator lamination 10 is rectangular, the length of the stator lamination 10 is L1, and the width of the stator lamination 10 is W1, where L1/W1 is not less than 1, and L1/W1 is not more than 1.1. So set up, can promote the intensity of stator punching 10 on the basis of guaranteeing motor 100 performance. Thereby refreshing the strength of the motor 100 using the stator lamination 10. Further, a plurality of stator laminations 10 are overlapped and fixed to form a stator, and the fixing holes 141 are used for fixing a fixing member, which is a nut in one embodiment.

Referring to fig. 2, in an embodiment, the fixing portion 14 is provided with a fixing hole 141, a radius of the fixing hole 141 is R3, R3 is not less than 2mm, and R3 is not greater than 3mm, a distance between a center of the fixing hole 141 and an outer edge of the stator lamination 10 is D1, wherein D1 is not less than 4.2mm, and D1 is not greater than 4.8 mm. Alternatively, when a plurality of stator lamination sheets 10 are stacked together to form a stator, the fixing hole 141 is used for a fixing member to pass through for fixing. In one embodiment, the fixing member is a nut. In order to ensure that the fixing piece does not touch the winding to cause damage to the winding when the motor 100 runs, the distance D1 between the center of the fixing hole 141 and the two sides of the stator punching sheet 10 is not less than 4.2mm and not more than 4.8 mm. On the basis, the fixing hole 141 with the radius R3 of 2mm to 3mm is adopted, so that the electromagnetic noise generated when the motor 100 operates can be reduced on the premise of not influencing the electromagnetic performance when the motor 100 operates.

Referring to fig. 2, in an embodiment, a chamfer is formed around the stator lamination 10, and a long side of the stator lamination 10 is disposed in a step shape. Specifically, the long side of the stator punching sheet 10 is in a double-step shape, that is, two weight reduction grooves are formed in two sides of the long side, so that the amount of the material of the stator punching sheet 10 can be reduced under the condition that the strength of the motor 100 is ensured, the manufacturing cost of the stator punching sheet 10 is reduced, and the economic performance of the stator punching sheet 10 and the motor 100 using the stator punching sheet 10 is improved.

Referring to fig. 1, the present invention further provides a motor 100, where the motor 100 includes a stator punching sheet 10, the motor 100 further includes a rotor punching sheet 20, the stator punching sheets 10 are overlapped along an axial direction of a rotating shaft to form a stator, the rotor punching sheets 20 are overlapped along the axial direction of the rotating shaft to form a rotor, and the rotor is disposed in the rotor hole. Further, the motor 100 further includes a stator winding, and the stator winding is wound on the stator teeth 12. The rotor sheet 20 is provided with a rotating shaft hole, a permanent magnet groove 23 and a boss 22, and the rotating shaft hole, the permanent magnet groove 23 and the boss 22 are also formed in the rotor formed by overlapping the plurality of rotor sheets 20 along the axial direction of the rotating shaft. Compared with the scheme that the positions of the rotating shaft hole, the permanent magnet groove 23 and the boss 22 are processed on the rotor after the rotor is manufactured, the scheme of adopting the rotor punching sheet 20 has lower processing difficulty and can save the manufacturing cost. Further, the motor 100 adopting the stator punching sheet 10 in the scheme has a higher slot filling rate and a lower iron core saturation degree, and the loss and the torque ripple of the motor 100 are lower.

Referring to fig. 3, in an embodiment, the rotor sheet 20 is annularly disposed, a rotating shaft hole is formed on an inner circumference of the rotor sheet 20, a plurality of protruding portions 22 are formed on an outer circumference of the rotor sheet 20, the protruding portions 22 are equidistantly spaced along the outer circumference of the rotor sheet 20, and a permanent magnet groove 23 is formed between two adjacent protruding portions 22. Further, four angles of the rotor boss are all transited in a circular arc mode, so that the bottom end of the permanent magnet groove 23 is also in a smooth circular arc shape, and the permanent magnet 30 is embedded into the permanent magnet groove 23 more conveniently. It is noted that, in order to facilitate the installation of the permanent magnet 30, the four corners of the permanent magnet 30 are also provided with chamfers. Specifically, the protrusions 22 are equidistantly distributed along the circumferential direction of the rotor sheet 20, so that the permanent magnets 30 embedded in the permanent magnet slots 23 are equidistantly distributed along the circumferential direction of the rotor. So set up, can guarantee magnetic pole evenly distributed. Meanwhile, the arrangement of the rotor boss also plays a role in improving the rotational inertia.

Referring to fig. 3, in an embodiment, a plurality of mounting holes 21 are further formed in the rotor sheet 20, centers of the plurality of mounting holes 21 are located on a circumference of a same concentric circle of the rotating shaft hole, a radius of the concentric circle where the plurality of mounting holes 21 are located is R4, R4 is not less than 13mm, and R4 is not more than 13.5 mm. Optionally, the plurality of rotor sheets 20 are riveted and overlapped by a rivet to form a rotor, and the rivet passes through the mounting hole 21 to assemble the plurality of rotor sheets 20 together. The processing difficulty of the rotor is reduced by the arrangement, so that the processing cost of the rotor is reduced. It should be noted that the range of R4 is between 13mm and 13.5mm, and after many experiments, when R4 is 13.35, 3 mounting holes 21 are formed on the rotor punching sheet 20. The arrangement of the rivet mounting hole 21 can ensure the electromagnetic performance of the motor 100 on the premise of not damaging the distribution of magnetic lines of force to the maximum extent.

Referring to fig. 3 and 4, in an embodiment, the motor 100 further includes a permanent magnet 30, the permanent magnet 30 is installed in the permanent magnet slot 23, the radian of the circumference corresponding to the permanent magnet slot 23 is β 1, the radian of the circumference corresponding to the installed permanent magnet 30 is β 2, and a difference between β 1 and β 2 is not less than 1 °. That is, the angle occupied by the permanent magnet slot 23 is larger than the angle occupied by the permanent magnet 30, and at least 1-degree difference exists between the two, so that the accuracy of the permanent magnet 30 during installation can be improved.

In one embodiment, the pole arc coefficient of the permanent magnet 30 is not less than 0.83 and not more than 0.85. The pole arc coefficient is a coefficient that describes the actual airgap field distribution over a range of pole pitches. The magnitude of which is determined by the magnetic field profile and thus by the shape of the excitation potential profile, the degree of homogeneity of the air gap and the degree of saturation of the magnetic circuit. By adopting the pole arc coefficient between 0.83 and 0.85, the leakage flux can be reduced while the airtight sine degree of the air gap can be ensured to the maximum extent, and the torque pulsation is reduced while the output torque is improved.

The utility model also provides a compressor, the compressor includes the motor. Compared with the traditional asynchronous motor, the permanent magnet brushless direct current motor has higher efficiency and smaller volume. In order to realize the purpose of high efficiency and miniaturization, the compressor adopts the scheme, and under the requirement of production cost, the motor core saturation degree of the vehicle-mounted compressor can be reduced through reasonable motor design, the groove fullness rate is improved, the loss is reduced, and the motor torque pulsation is reduced.

The utility model also provides a domestic appliance, domestic appliance includes the compressor. The household appliance includes an in-vehicle refrigerator. With the popularization of automobiles and the pursuit of people for high-quality driving feeling, the vehicle-mounted refrigerator is more and more widely applied to middle and high-grade automobiles, and the development of a vehicle-mounted refrigerator compressor is promoted. And miniaturization is an inevitable trend in the development of on-vehicle refrigerators. Therefore, use the utility model discloses the on-vehicle refrigerator of compressor that provides in the application can satisfy the user to the miniaturized requirement of on-vehicle refrigerator. Further, the compressor can also be applied to other household appliances, such as air conditioners, other types of refrigerators and the like.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A stator punching sheet is characterized by comprising:

a yoke portion arranged in a ring shape;

the stator teeth are arranged at intervals along the inner periphery of the yoke part and comprise tooth bodies and tooth crowns, one ends of the tooth bodies are connected with the yoke part, and the other ends of the tooth bodies are connected with the tooth crowns;

the rotor hole and the yoke part have the same circle center, and an arc coincident with the edge of the rotor hole is formed on one side, away from the yoke part, of the tooth crown;

the width of the tooth body is K1, the width of the yoke part is K2, wherein K1/K2 is not less than 1, and K1/K2 is not more than 1.1.

2. The stator punching sheet according to claim 1, wherein the distance from one end of the tooth crown in the circumferential direction of the rotor hole to the tooth body is K3, wherein K1/K3 is not less than 0.9, and K1/K3 is not more than 1.1.

3. The stator lamination as recited in claim 2, wherein the radius of the rotor hole is R1, the radius of the outer periphery of the yoke is R2, wherein R1/R2 is not less than 0.6, and R1/R2 is not more than 0.65.

4. The stator punching sheet according to claim 1, further comprising a fixing portion surrounding the outer periphery of the yoke portion, so that the stator punching sheet is rectangular, the stator punching sheet has a length of L1 and a width of W1, wherein L1/W1 is not less than 1, and L1/W1 is not more than 1.1.

5. The stator lamination as claimed in claim 4, wherein the fixing portion is provided with a fixing hole, the fixing hole has a radius of R3, R3 is not less than 2mm, and R3 is not greater than 3mm, the fixing hole has a center at a distance of D1 from the outer edge of the stator lamination, wherein D1 is not less than 4.2mm, and D1 is not greater than 4.8 mm.

6. An electric machine, characterized by, including the stator punching of any one of claims 1 to 5, the electric machine also includes rotor punching, a plurality of the stator punching overlap along the axial of pivot and form the stator, a plurality of the rotor punching overlap along the axial of pivot and form the rotor, the rotor sets up in the rotor hole.

7. The motor as claimed in claim 6, wherein the rotor sheet is disposed in a ring shape, the inner circumference of the rotor sheet is formed with a rotating shaft hole, the outer circumference of the rotor sheet is formed with a plurality of protruding portions, the protruding portions are disposed at equal intervals along the outer circumference of the rotor sheet, and a permanent magnet groove is formed between two adjacent protruding portions.

8. The motor of claim 7, wherein the rotor punching sheet is further formed with a plurality of mounting holes, the centers of the plurality of mounting holes are located on the circumference of the same concentric circle of the rotating shaft hole, the radius of the concentric circle where the plurality of mounting holes are located is R4, R4 is not less than 13mm, and R4 is not more than 13.5 mm.

9. The motor of claim 8, further comprising a permanent magnet, wherein the permanent magnet is mounted in the permanent magnet slot, the radian of the circumference corresponding to the permanent magnet slot is β 1, the radian of the circumference corresponding to the permanent magnet slot after mounting is β 2, and the difference between β 1 and β 2 is not less than 1 °.

10. The motor according to claim 9, wherein the pole arc coefficient of the permanent magnet is not less than 0.83 and not more than 0.85, and four corners of the permanent magnet are provided with chamfers.

11. A compressor, characterized by comprising an electric machine according to any one of claims 6 to 10.

12. A household appliance comprising a compressor as claimed in claim 11.