Stator punching sheet, motor and compressor

Abstract

The utility model provides a stator punching sheet, a motor and a compressor. The stator punching sheet comprises a stator yoke part which is in a circular ring shape; the stator teeth are uniformly arranged along the inner circumference of the stator yoke part at intervals in the circumferential direction; a plurality of grooves are formed in the outer surface of the stator yoke part in the circumferential direction, the area of each groove is Sn, the diameter of the outer circle of the stator yoke part is D1, the radius of the inner circle of the stator yoke part is R1, and the relation among Sn, R1 and D1 is that n is a positive integer larger than or equal to 1. By reasonably setting the area of the groove of the outer circle of the stator yoke part, the through-flow area of the stator iron core is improved, the strength of the stator iron core is improved, the stator iron core is prevented from being deformed due to the action of hot jacket, welding or motor electromagnetic force, and the noise problem of the compressor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a stator punching sheet, motor and compressor. BACKGROUND

[0002] With the rapid development of refrigeration equipment technology, the compressor as the core component of the refrigeration equipment is developing towards miniaturization and high frequency. Miniaturization and high frequency will further reduce the flow area of the motor, resulting in low performance of the compressor, and poor oil return effect of the compressor. The prior art can increase the flow area by increasing the stator cutting edge, but the setting of the cutting edge will cause the rigidity of the stator to be poor, and deformation and noise problems are prone to occur, affecting the service life of the motor. SUMMARY

[0003] In view of the problems in the prior art, the utility model aims to provide a stator punching sheet, motor and compressor, improve the rigidity of the stator, reduce the deformation and improve the noise problem of the compressor.

[0004] An embodiment of the utility model provides a kind of stator punching sheet, comprising:

[0005] Stator yoke portion, annularly;

[0006] Stator tooth, along the inner circumference of the stator yoke portion is uniformly arranged;

[0007] The outer surface of the stator yoke portion is provided with n grooves along the circumferential direction, the area of the groove is Sn, the outer circle diameter of the stator yoke portion is D1, the inner circle radius of the stator yoke portion is R1, the relationship of Sn, R1, D1 is as follows:

[0008]

[0009] Wherein, n is the positive integer greater than or equal to 1.

[0010] In some embodiments, the number n of the groove ranges: 3

[0011] In some embodiments, the connecting line of adjacent two grooves includes at least part of circular arc line.

[0012] In some embodiments, the length of the circular arc line between adjacent two grooves is Ln, one end of the stator tooth away from the stator yoke portion is enclosed to form a circumferential structure, the radius of the circumferential structure is R2, and the Ln and R2 satisfy:

[0013] In some embodiments, the stator tooth comprises a radial portion and an axial portion, one end of the radial portion is connected to the inner surface of the stator yoke portion, the other end of the radial portion is connected to the axial portion, the axial portion extends along the axial direction of the stator yoke portion; a stator slot is formed between two adjacent stator teeth.

[0014] In some embodiments, the number of the stator slots is m, and m satisfies: 6≤m≤18.

[0015] Embodiments of the utility model also provide a motor, including stator and rotor, the stator includes the stator core that a plurality of stator laminations described above are laminated, and the rotor includes the rotor core that a plurality of rotor laminations are laminated.

[0016] In some embodiments, the number of the stator slots is m, and the number of poles of the rotor is p, and m and p satisfy: 0.6≤m / p≤1.7.

[0017] In some embodiments, m / p=3 / 2.

[0018] Embodiments of the utility model also provide a compressor, including the motor described above.

[0019] The stator lamination, motor and compressor provided by the utility model have the following advantages:

[0020] The utility model sets up the stator lamination as including the stator yoke portion in ring shape and the plurality of stator teeth that are arranged along the inner circumference of the stator yoke portion evenly, the outer surface of the stator yoke portion is equipped with a plurality of recesses along the circumferential direction, the area of the recess is Sn, the outer circle diameter of the stator yoke portion is D1, the inner circle radius of the stator yoke portion is R1, the relation of Sn, R1, D1 is Wherein, n is the positive integer greater than or equal to 1;By the area of recess of the outer circle of the stator yoke portion, realize the improvement of the flow area of the stator core, and improve the strength of the stator core, prevent the deformation of the stator core due to the effect of hot set, welding or motor electromagnetic force, improve the noise problem of compressor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of non-restrictive embodiments with reference to the following drawings.

[0022] Figure 1 It is the schematic diagram of the stator lamination of an embodiment of the utility model.

[0023] Reference signs:

[0024] 100 stator lamination

[0025] 10 stator yoke portion

[0026] 11 recess

[0027] 20 stator tooth

[0028] 21 radial portion

[0029] 22 axial portion DETAILED DESCRIPTION

[0030] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the several views. Like components will not be repeated in their entirety with their descriptions where appropriate. The same reference numbers in different drawings indicate the same or similar elements.

[0031] In the description of the present application, the expressions "one embodiment", "some embodiments", "example", "specific example" or "some examples" are used to generally indicate certain features, structures, materials, or characteristics included in at least one embodiment or example of the present application. Moreover, such expressions are not necessarily referring to the same embodiment or example. Furthermore, such expressions do not necessarily refer to the same embodiment or example, but different embodiments and examples can be

[0032] In addition, the terms "first", "second", etc., are used herein only to describe various tenninates in the example embodiments and do not constitute a limitation as to the number or order of these tenninates. Therefore, a tenninate defined with "first", "second", etc., can include at least one of the tenninates without being explicitly shown or described. In the description of the present application, the meaning of "plurality" is two or more unless explicitly specifically defined otherwise.

[0033] It is further understood that the terms "comprises", "comprising", "includes" and / or "including" specify the presence of stated features, steps, operations, elements, components, items, and / or groups but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, items, and / or groups thereof. As used herein, the terms "and / or" and "at least one of" are interpreted to be inclusive, allowing for the presence of one or more or any combination of the listed items. As used herein, the term "or" is construed as inclusive or, meaning A, B, or C, or any combination thereof. As used herein, the term "and / or" is construed to be equivalent to "and" or "or", meaning A and B or A and C or B and C or A and B and C or A and B or A. An exception to this definition will occur only when two or more versions of identical words used in combination with one another where in certain context the term "only one of the A or B" or "at least one of the A and B" is intended, and only when no combination of two or more of the identical words is intended.

[0034] To solve the problems in the prior art, the utility model discloses a stator lamination, comprising: the stator yoke portion, circular ring shape, the stator tooth is along the inner circumference of the stator yoke portion Evenly arranged interval, the outer surface of the stator yoke portion is equipped with a plurality of recesses along the circumferential direction, the area of recess is Sn, the outer circle diameter of the stator yoke portion is D1, the inner circle radius of the stator yoke portion is R1, the relationship of Sn, R1, D1 is: Wherein, n is the positive integer greater than or equal to 1. The technical scheme, by setting recess on the outer circle of the stator lamination, makes the stator core formed by the lamination of the stator lamination have recess, can guarantee that the stator core has enough flow area, πD1 2 / 4-πR1 2 The circular ring area where the stator yoke portion is, The recess area occupies the percentage of the circular ring area where the stator yoke portion is, by limiting the percentage of the recess area in the circular ring area where the stator yoke portion is, the area of recess is restricted, the strength of the stator core is guaranteed, the stator is prevented from deforming due to the action of shrinkage, welding or motor electromagnetic force, and the compressor noise problem is improved.

[0035] The stator lamination of the utility model will be further described below in combination with the drawings and specific embodiments. It can be understood that the specific embodiments shown are not as a limitation on the protection scope of the utility model.

[0036] Figure 1 The schematic diagram of the stator lamination provided by an embodiment of the utility model is shown. As Figure 1 Shown, the stator lamination includes the stator yoke portion 10 and the stator tooth 20. Wherein, the stator yoke portion 10 is circular ring shape, and the stator tooth 20 is evenly arranged interval along the inner circumference of the stator yoke portion 10;The outer surface of the stator yoke portion 10 is equipped with a plurality of recesses 11 along the circumferential direction, the area of recess 11 is Sn, the outer circle diameter of the stator yoke portion 10 is D1, the inner circle radius of the stator yoke portion 10 is R1, the relationship of the area Sn of recess 11, R1 and D1 is: Wherein, n is the positive integer greater than or equal to 1. Wherein,

[0037] By setting recess 11 on the outer circle of the stator yoke portion 10, the stator core formed by the lamination of the stator lamination 100 has recess, can guarantee that the stator core has enough flow area;By limiting the relationship between the area of recess 11 and the diameter of the stator yoke portion 10 and the inner circle radius of the stator yoke portion 10, the area of recess 11 is restricted, the strength of the stator core is guaranteed, the stator is prevented from deforming due to the action of shrinkage, welding or motor electromagnetic force, and the compressor noise problem is improved.

[0038] Further, in some embodiments, the number n of the grooves 11 on the stator lamination 100 ranges from 3 < n < 19. Figure 1 As shown, in this embodiment, 15 grooves 11 are uniformly arranged on the stator lamination 100. The number of the grooves 11 on the stator lamination 100 is set according to actual requirements, which is not specifically limited here.

[0039] Further, in this embodiment, the line connecting two adjacent grooves 11 comprises at least a partial circular arc line. The arrangement of the circular arc line facilitates the fixation of the stator core and the housing into one through the heat shrink process, improving the stability of the connection between the stator core and the housing.

[0040] Further, in some embodiments, the arc length distance between two adjacent grooves 11 is Ln, the end of the stator tooth 20 away from the stator yoke 10 forms a circumferential structure, the radius of the circumferential structure is R2, and Ln and R2 satisfy: wherein, 2πR2 is the circumference of the circumferential structure. In this embodiment, there are 15 circular arc lines between the 15 grooves 11, and here n = 15. The arrangement of the ratio relationship between Ln and the circumference of the circumferential structure can further improve the flow area of the stator core, limit the length of the circular arc segment connecting the stator core and the housing together, improve the stiffness of the stator core, reduce the noise of the compressor, and improve the energy efficiency of the compressor.

[0041] Further, as shown, Figure 1 The stator tooth 20 comprises a radial portion 21 and an axial portion 22, one end of the radial portion 21 is connected to the inner surface of the stator yoke 10, the other end of the radial portion 21 is connected to the axial portion 22, the axial portion 22 extends along the axial direction of the stator yoke 10, and the stator slot is formed between two adjacent stator teeth 20. The stator tooth 20 is wound with a stator winding, and the stator winding is located in the stator slot. In some embodiments, the stator winding can be a three-phase stator winding to generate a rotating magnetic field.

[0042] In some embodiments, the number of stator slots is m, and m satisfies: 3 < m < 18. The number of stator slots determines the distribution mode of the stator winding, which can affect the magnetic field distribution of the motor. More stator slots can provide more uniform magnetic field distribution, reduce the unevenness of the magnetic field, and thus improve the efficiency and performance of the motor.

[0043] Further, the utility model embodiment also provides a motor, comprising a stator and a rotor, the stator comprises a plurality of stator laminations that are stacked to form a stator core, and the rotor comprises a plurality of rotor laminations that are stacked to form a rotor core. Since the motor in this embodiment adopts the stator lamination in the above-mentioned embodiments, all the beneficial effects brought by the stator lamination of the above-mentioned technical solutions can be achieved, which will not be described here.

[0044] Further, in some embodiments, the material of the stator lamination 100 and the rotor lamination can be silicon steel sheet, which has low iron loss, high stacking factor, good magnetic induction and good lamination performance, thereby ensuring good working performance of the stator lamination; the silicon steel sheet can reduce eddy current loss and hysteresis loss, thereby reducing the heating of the core, and the silicon steel sheets are insulated from each other, which can reduce the flow area and further reduce the heating. In other embodiments, the material of the stator lamination can be selected from neodymium iron boron or ferrite and other permanent magnetic materials. The material of the stator lamination 100 and the rotor lamination is the same, which is conducive to batch production of the lamination and reduces manufacturing cost. In other embodiments, the rotor lamination and the stator lamination 100 can be different materials or shapes, thereby meeting the needs of different processing technologies of the stator and the rotor, facilitating selection of appropriate lamination to form the rotor core and the stator core according to the performance requirements of the motor, thereby ensuring good performance of the motor, and also improving the wide application range of the motor.

[0045] Further, in some embodiments, the number of stator slots is m, and the number of poles of the rotor is p, and m and p satisfy: 0.6≤m / p≤1.7. Specifically, the number of stator teeth 10 is related to the number of poles of the stator, and by limiting the relationship between the number of stator teeth 20 and the number of poles of the rotor, a fractional-slot motor is formed, which can effectively weaken the high-order harmonic potential generated by the non-sine distribution of the magnetic pole magnetic field, and also can weaken the amplitude of the tooth harmonic potential and improve the waveform. In addition, since the motor in the form of fractional-slot motor can also effectively reduce the amplitude of the magnetic flux pulse, thereby reducing the pulse loss on the surface of the magnetic pole. In a more preferred embodiment, m / p=3 / 2.

[0046] The utility model embodiment further provides a kind of compressor, comprising the motor as described above. The compressor includes the motor described above, so that all the technical effects of the motor can be achieved, which will not be repeated here.

[0047] The utility model embodiment further provides a kind of refrigeration equipment, comprising the compressor as described above. The refrigeration equipment includes the compressor described above, so that all the technical effects of the compressor described above can be achieved, which will not be repeated here.

[0048] In summary, the stator lamination, motor, compressor and refrigeration equipment provided by the utility model have the following advantages:

[0049] By reasonably setting the area of the groove of the outer circle of the stator yoke part, the flow area of the stator core is improved, and the strength of the stator core is improved, so that the stator core is prevented from being deformed due to the effects of shrink fitting, welding or electromagnetic force of the motor, and the noise problem of the compressor is improved. By limiting the arc length between the two adjacent grooves, the flow area of the stator core can be further improved, the length of the circular arc segment connecting the stator core and the shell together is limited, the rigidity of the stator core is improved, and the energy efficiency of the compressor is improved.

[0050] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be regarded as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. A stator lamination characterized by, The application relates to a motor comprising: a stator yoke part in the shape of a ring; a plurality of stator teeth arranged uniformly along the inner circumference of the stator yoke part; a plurality of recesses are arranged on the outer surface of the stator yoke part along the circumferential direction, the area of each recess is Sn, the outer diameter of the stator yoke part is D1, the inner radius of the stator yoke part is R1, and the relationship among the Sn, the R1 and the D1 is: wherein n is a positive integer greater than or equal to 1.

2. The stator lamination of claim 1, wherein, The number n of the recesses ranges from 3 to 19.

3. The stator lamination of claim 1, wherein, The line connecting two adjacent recesses comprises at least a partial circular arc.

4. A stator lamination according to claim 3, characterised in that The length of the circular arc line between two adjacent grooves is Ln, one end of the stator tooth away from the stator yoke part encloses a circumferential structure, the radius of the circumferential structure is R2, the Ln and the R2 satisfy:

5. The stator lamination of claim 1, wherein, The stator teeth comprise a radial part and an axial part, one end of the radial part is connected to the inner surface of the stator yoke part, the other end of the radial part is connected to the axial part, the axial part extends along the axial direction of the stator yoke part, and a stator slot is formed between two adjacent stator teeth.

6. A stator lamination according to claim 5, characterized in that The number of the stator slots is m, and m satisfies 6<=m<=18.

7. An electric machine characterized by The motor comprises a stator and a rotor, the stator comprises a stator core formed by stacking a plurality of stator laminations, and the rotor comprises a rotor core formed by stacking a plurality of rotor laminations.

8. The electric machine of claim 7, wherein, The number of the stator slots is m, the number of poles of the rotor is p, and m / p satisfies 0.6<=m / p<=1.

7.

9. The electric machine of claim 8, wherein, m / p=3 / 2.

10. A compressor characterized by, The motor comprises the motor as claimed in claim 7, 8 or 9.

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