CN115441604A - Stator punching, motor and compressor - Google Patents
Stator punching, motor and compressor Download PDFInfo
- Publication number
- CN115441604A CN115441604A CN202110614666.6A CN202110614666A CN115441604A CN 115441604 A CN115441604 A CN 115441604A CN 202110614666 A CN202110614666 A CN 202110614666A CN 115441604 A CN115441604 A CN 115441604A
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- Prior art keywords
- stator
- punching sheet
- yokes
- teeth
- yoke
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a stator punching sheet, a motor and a compressor, wherein the stator punching sheet comprises a plurality of stator yoke parts and a plurality of stator teeth which are radially arranged on one side of the stator yoke parts; the plurality of stator yokes are annularly spliced and fixed into an annular yoke; at least one stator tooth is spliced and fixed on one or more stator yokes; the height of the stator teeth along the radial direction of the stator punching sheet is H, and the outer diameter of the stator punching sheet is D 1 The inner diameter of the stator punching sheet is D 2 Satisfies the following conditions: 0.5<[(2*H+D 2 )/D 1 ]<1; the stator punching sheet structure is beneficial to improving the expansibility of the stator punching sheet and improving the flexibility of the stator punching sheet under the condition of meeting different output power and output torque requirements.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a stator punching sheet, a motor and a compressor.
Background
The stator punching sheet of the traditional centralized coil motor is mostly formed by blanking the stator in a complete set. Although the integral type blanking is convenient for manufacturing, the stator punching sheet can not be adjusted after being shaped. When the inner diameter of the stator punching sheet needs to be adjusted or the design with large parameter change cannot be carried out due to the consideration of different power output requirements. At the moment, a new stator punching must be designed, so that the expansibility of the stator punching is poor.
Disclosure of Invention
In view of this, the invention provides a stator punching sheet, a motor and a compressor, which are beneficial to improving the flexibility of meeting different output power and output torque requirements of the motor punching sheet.
According to one aspect of the invention, a stator punching sheet is provided, which comprises a plurality of stator yokes and a plurality of stator teeth radially arranged on one side of the stator yokes; the plurality of stator yokes are annularly spliced, assembled and fixed to form annular yokes; at least one stator tooth is spliced and fixed on one or more stator yokes;
the height of the stator teeth along the radial direction of the stator punching sheet is H, and the outer diameter of the stator punching sheet is D 1 The inner diameter of the stator punching sheet is D 2 And satisfies the following conditions: 0.5<[(2*H+D 2 )/D 1 ]<1。
Optionally, the end surface of the stator tooth, which is in contact with the stator yoke, is provided with at least one convex part;
the inner peripheral surface of the stator yoke portion, which is in contact with the stator teeth, is provided with a limiting concave portion, and the convex portion is clamped in the limiting concave portion, so that the stator teeth are clamped in the stator yoke portion.
Optionally, the height H of the stator teeth in the radial direction of the stator lamination and the outer diameter D of the stator lamination 1 And the inner diameter D of the stator punching sheet 2 Also satisfies: 0.45 ≤ (D) 2 /D 1 )≤(4H/D 1 )。
Optionally, the inner circumference of the stator teeth away from the stator yoke part is provided with a circular arc salient pole, and the curvature radius of the circular arc salient pole is R, R and the inner diameter D of the stator punching sheet 2 Satisfies the following conditions: (R/D) 2 )>0.5。
Optionally, the number of the stator yokes is 3 times, and every 3 stator yokes are taken as a group, and the outer peripheries of two stator yokes in each group are partially inwards sunken to form a sunken part.
Optionally, the inner side of the stator yoke is provided with a multiple of 3 limiting recesses.
According to another aspect of the invention, an electric machine is provided, which comprises a stator core, wherein the stator core comprises any one of the stator punching sheets.
According to another aspect of the present invention, there is provided a compressor including the above-described motor.
Compared with the prior art, the invention has the beneficial effects that:
the stator punching sheet, the motor and the compressor provided by the invention adopt the segmented stator punching sheet, the connection between the stator teeth and the stator yoke part is fixed by adopting the concave-convex clamping points, so that when the inner diameter of the stator needs to be changed, only the stator teeth need to be replaced, the stator yoke part can be kept unchanged, the whole stator punching sheet does not need to be replaced, and the flexibility of meeting the requirements of different output powers and output torques of the motor punching sheet is favorably improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a stator punching disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural view of a stator yoke portion of a chain structure in an extended state;
FIG. 3 is a schematic view of a stator tooth structure;
fig. 4 is a schematic structural diagram of a stator assembly according to an embodiment of the present invention.
Reference numerals
Stator yoke-101, stator teeth-102, convex part-103, limit concave part-104, extension-105, second convex part-106, second limit concave part-107 and concave part-108.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied 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 concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
In the prior art, a stator punching sheet comprises a stator yoke portion and stator teeth radially arranged on the inner side of the stator yoke portion. The stator teeth and the stator yoke may be formed in an integral structure by blanking. And a stator slot for accommodating the coil is formed between two adjacent stator teeth. Because the stator teeth and the stator yoke part are of an integrated structure, when the output torque needs to be adjusted, a new stator core needs to be replaced, and the expansibility is poor. And if the stator punching sheet is made of the oriented electrical steel, the whole stator punching sheet is completely replaced by a new oriented electrical steel punching sheet, and the cost is also high.
As shown in FIG. 1, the invention discloses a stator punching sheet. The stator punching sheet comprises a plurality of stator yoke parts 101 and a plurality of stator teeth 102 which are radially arranged on one side of the stator yoke parts 101. The plurality of stator yokes 101 are annularly assembled and fixed to form annular yokes. At least one of the stator teeth 102 is fixed to one or more of the stator yokes 101 by means of splicing. Therefore, the annular yoke parts of the same size can be matched with a plurality of stator teeth 102 of different sizes for replacement and connection, when the inner diameter of a stator needs to be changed, only the stator teeth 102 need to be changed, the annular yoke parts do not need to be changed, the operation is convenient, and the cost for changing the stator punching sheets is lower.
Referring to fig. 3, in the present embodiment, at least one protrusion 103 is disposed on an end surface of the stator tooth 102 contacting the stator yoke 101. A stopper recess 104 is provided on an inner circumferential surface of the stator yoke 101, which comes into contact with the stator teeth 102. The number of the stopper recesses 104 may be equal to the number of the projections 103. The shape of the limiting concave part 104 and the shape of the convex part 103 are correspondingly matched, namely the shape of each limiting concave part 104 is matched with the shape of the convex part 103 which is correspondingly connected. The convex portion 103 is engaged with the concave portion 104 so that the stator teeth 102 are engaged with the stator yoke 101.
In the present embodiment, the number ratio of the stator yoke 101 to the stator teeth 102 is 1. However, the number ratio is not limited in the present application, and in other embodiments, the number ratio of the stator yokes 101 to the stator teeth 102 may also be 2.
In this embodiment, the inner side of the stator yoke 101 is provided with multiple limiting recesses 104 of 3, and the limiting recesses 104 are uniformly distributed along the outer edge of the stator teeth 102 close to the stator yoke 101, which is beneficial to improving the fastening firmness of the clamping. Correspondingly, 3 convex parts 103 are also arranged on the stator teeth 102, and each convex part 103 is correspondingly clamped in one limiting concave part 104. The shape of each protrusion 103 may be the same, or the shape of some protrusions 103 may be different, which is beneficial to further improve the fastening of the stator teeth 102 and the stator yoke 101.
In this embodiment, referring to fig. 1 and 3, the height of the stator teeth 102 along the radial direction of the stator lamination is H, and the outer diameter of the stator lamination is D 1 The inner diameter of the stator punching sheet is D 2 Satisfies the following conditions: 0.5<[(2*H+D 2 )/D 1 ]<1. Wherein, on one hand, [ (2 x H + D) 2 )/D 1 ]>0.5, the adverse effect on the output power of the motor caused by the over-small height of the stator teeth 102 or the over-small outer diameter of the rotor can be prevented, and the motor is favorable for outputting higher power. On the other hand guarantees [ (2 x H + D) 2 )/D 1 ]<1, the width of the stator yoke portion 101 in the radial direction of the stator lamination is greater than 0, otherwise, the output torque of the motor is small, and the motor requirement of large output torque cannot be met.
In this embodiment, the stator teeth 102 have a first end and a second end opposite to the first end, the second end has two extending portions 105 that extend along the circumferential direction of the stator punching sheet and along opposite directions, the extending portions 105 of all the stator teeth 102 of the stator punching sheet are combined in a circumferential direction to form an inner circumference of the stator punching sheet, and an inner diameter of the stator punching sheet is a diameter of the inner circumference.
In the present embodiment, the above H and D 1 And D 2 Meanwhile, the following requirements are met: not more than 0.45 (D) 2 /D 1 )≤(4H/D 1 ). On the one hand guarantee (D) 2 /D 1 ) The output torque of the motor and the material utilization rate of the motor are improved favorably because the output torque of the motor is more than or equal to 0.45; otherwise, the stator yoke 101 is not fully utilized, and the material utilization rate of the motor is poor. On the other hand guarantees (D) 2 /D 1 )≤(4H/D 1 ) The height of the stator teeth 102 can be within a reasonable range, and the requirement of a motor with large output torque is met; otherwise, the layout of the stator slots is affected, so that the output torque of the motor is smaller.
As shown in fig. 2, in an embodiment, the stator yoke portion 101 is a chain type connection structure, and can be punched by a die and is self-fastened into a chain type core, and the stator yoke portion 101 is in a long strip shape in an extended state, which is beneficial to improving the material utilization rate in the process of punching and manufacturing the stator punching sheet. The second convex portions 106 and the second limiting concave portions 107 are respectively arranged on two sides of the stator yoke portion 101, and the second convex portions 106 of the front stator yoke portion 101 of the two adjacent stator yoke portions 101 can be clamped in the second limiting concave portions 107 of the rear stator yoke portion 101, and are sequentially clamped in the front and the rear to form a ring shape. This ensures the firmness of the annular attachment structure of the stator yoke 101.
In this embodiment, the inner periphery of the stator teeth 102 facing away from the stator yoke 101 has a circular salient pole having a radius of curvature R and R equal to an inner diameter D of the stator lamination 2 Satisfies the following conditions: (R/D) 2 )>0.5. The ratio range is beneficial to ensuring that the motor can meet the use requirement of large output torque, otherwise, the output torque of the motor is smaller.
In this embodiment, the number of the stator yokes 101 is 3 times, and each 3 stator yokes 101 are grouped, and the outer peripheries of two stator yokes 101 in each group are partially recessed inward to form a recessed portion 108. The recess 108 can be designed in any shape according to the needs of a magnetic circuit of the stator core, heat dissipation, refrigerant circulation, and the like.
In the embodiment, the stator teeth 102 are made of oriented electrical steel materials, and the stator yoke 101 is made of non-oriented electrical steel materials, so that the cost of the non-oriented electrical steel materials is lower, the iron loss of the oriented electrical steel materials is lower, and the magnetic induction is better, so that the situation that all stator laminations need to be replaced by the oriented electrical steel materials and only the stator teeth 102 need to be replaced by the oriented electrical steel materials when the stator laminations are replaced can be avoided, and the cost is reduced; on the other hand, the excellent magnetic directionality of the oriented electrical steel material is utilized, so that the magnetic permeability of the tooth part of the stator core is favorably improved, the iron loss of the tooth part is reduced, and the motor efficiency is favorably improved.
The embodiment of the invention also provides a motor, which comprises a stator core, wherein the stator core comprises a plurality of stator punching sheets described in any embodiment. In this embodiment, the stator core has a modular structure. In the production process, a stator yoke part 101 and a stator tooth 102 are combined to form a punching sheet unit, a plurality of punching sheet units are stacked to form a T-shaped iron core module, and then a coil is wound on a tooth part of the T-shaped iron core module to form the stator module. As shown in fig. 4, all of the stator modules are assembled around a circle to form a stator assembly. Therefore, the stator assembly comprises a stator core and a stator winding. The stator core is composed of a circle of T-shaped iron core modules. The coil winding area of a single tooth part is larger than that of the integrally formed stator core, so that the reduction of the copper loss of the motor is facilitated, and the motor efficiency is improved. The detailed structural features and advantages of the stator punching sheet can refer to the description of the above embodiments, and are not repeated herein.
The embodiment of the invention also provides a compressor, which comprises the motor disclosed by the embodiment.
In summary, the stator punching, the motor and the compressor at least have the following advantages:
the stator punching sheet, the motor and the compressor disclosed by the embodiment adopt the segmented stator punching sheet, the connection between the stator teeth and the stator yoke parts is fixed by adopting the concave-convex clamping points, the stator inner diameter is changed, only the stator teeth need to be replaced, the stator yoke parts can be kept unchanged, the whole stator punching sheet does not need to be replaced, and the flexibility of meeting different output power and output torque requirements of the motor punching sheet is favorably improved.
In the description of the present invention, it is to be understood that the terms "bottom", "longitudinal", "lateral", "upper", "lower", "front", "rear", "vertical", "horizontal", and the like refer to orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of description, and do not indicate or imply that the structures or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more and "several" means one or more unless otherwise specified.
In the description herein, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. The stator punching sheet is characterized by comprising a plurality of stator yoke parts (101) and a plurality of stator teeth (102) which are radially arranged on one side of the stator yoke parts (101); the plurality of stator yokes (101) are annularly spliced, assembled and fixed to form annular yokes; at least one stator tooth (102) is spliced and fixed on one or more stator yokes (101);
the height of the stator teeth (102) in the radial direction of the stator punching sheet is H, and the outer diameter of the stator punching sheet is D 1 The inner diameter of the stator punching sheet is D 2 And satisfies the following conditions: 0.5<[(2*H+D 2 )/D 1 ]<1。
2. The stator punching sheet according to claim 1, wherein the end surface of the stator tooth (102) contacting with the stator yoke (101) is provided with at least one convex portion (103);
the inner circumferential surface of the stator yoke portion (101) contacting with the stator teeth (102) is provided with a limiting concave portion (104), and the convex portion (103) is clamped in the limiting concave portion (104) so that the stator teeth (102) are clamped in the stator yoke portion (101).
3. The stator lamination as recited in claim 1, wherein the height H of the stator teeth (102) in the radial direction of the stator lamination, and the outer diameter D of the stator lamination 1 And the inner diameter D of the stator punching sheet 2 Also satisfies: not more than 0.45 (D) 2 /D 1 )≤(4H/D 1 )。
4. The stator lamination as recited in claim 1, wherein an inner circumference of the stator teeth (102) facing away from the stator yoke portion (101) has a circular salient pole with a radius of curvature R, R and an inner diameter D of the stator lamination 2 Satisfies the following conditions: (R/D) 2 )>0.5。
5. The stator punching sheet according to claim 1, wherein the number of the stator yokes (101) is 3 times, and every 3 stator yokes (101) form a group, and the outer peripheries of two stator yokes (101) in each group are locally recessed inwards to form a recessed portion.
6. The stator lamination as recited in claim 1, characterized in that the inner side of the stator yoke (101) is provided with a multiple of 3 of the limiting recesses (104).
7. An electric machine comprising a stator core comprising a plurality of stator laminations as claimed in any one of claims 1 to 6.
8. A compressor, characterized by comprising an electric machine according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614666.6A CN115441604A (en) | 2021-06-02 | 2021-06-02 | Stator punching, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110614666.6A CN115441604A (en) | 2021-06-02 | 2021-06-02 | Stator punching, motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115441604A true CN115441604A (en) | 2022-12-06 |
Family
ID=84272259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110614666.6A Pending CN115441604A (en) | 2021-06-02 | 2021-06-02 | Stator punching, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115441604A (en) |
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2021
- 2021-06-02 CN CN202110614666.6A patent/CN115441604A/en active Pending
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