CN106130203A - Stator and there is its motor - Google Patents
Stator and there is its motor Download PDFInfo
- Publication number
- CN106130203A CN106130203A CN201610551824.7A CN201610551824A CN106130203A CN 106130203 A CN106130203 A CN 106130203A CN 201610551824 A CN201610551824 A CN 201610551824A CN 106130203 A CN106130203 A CN 106130203A
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- stator
- auxiliary
- radial direction
- arc angle
- teeth
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- 230000002093 peripheral effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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 kind of stator and there is its motor.Stator includes stator body, stator body has stator teeth, auxiliary tank is offered on stator teeth, auxiliary tank along the length direction of stator teeth through be opened on the end face of stator teeth, stator teeth has polar arc angle along centrage and the auxiliary tank along this stator teeth of the radial direction of stator body along the centrage of the radial direction of stator body.Auxiliary tank is set, it is possible to play alleviation magnetic conduction passage in excessively magnetic saturation produced during stator pole shoes.The magnetic pressure fall of this auxiliary tank part is essentially identical to the part that magnetic saturation is unnecessary, it is possible to achieve motor torque output is basically unchanged, the effect that iron loss is greatly reduced.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a stator and a motor with the same.
Background
In the process of punching the lamination by using the die, the permanent magnet motor in the prior art needs more punches of the die and needs to be switched for many times, so that the motor manufacturing process is complex and the production cost is high.
Compared with a permanent magnet motor, the synchronous reluctance motor has no permanent magnet, and the rotor is in the rotating process, and because the reluctance between the stator and the rotor changes, the pulsation of the magnetic flux inside the motor is increased under the condition that the permanent magnet is lacked (as shown in fig. 1, wherein 101 is a stator tooth part, and 202 is a magnetic conduction channel), so that the iron loss is also increased, and the performance of the motor is affected.
Disclosure of Invention
The invention mainly aims to provide a stator and a motor with the same, and aims to solve the problem of low performance of the motor in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a stator of a motor, including: the stator body is provided with a stator tooth part, an auxiliary groove is formed in the stator tooth part, the auxiliary groove is penetratingly formed in the end face of the stator tooth part along the length direction of the stator tooth part, and the central line of the stator tooth part along the radial direction of the stator body and the central line of the auxiliary groove in the stator tooth part along the radial direction of the stator body are provided with a polar arc angle.
Further, a center line of the stator tooth portion in the radial direction of the stator body and a center line of the auxiliary slot on the stator tooth portion in the radial direction of the stator body have a polar arc angle satisfying the following formula: when alpha 2/alpha 1 is less than 0.65, alpha 3 is 0.5 multiplied by alpha 2-, wherein alpha 1 is the pole arc angle of the stator; alpha 2 is the pole arc angle of the stator tooth part; α 3 is a polar arc angle of a center line of the auxiliary slot in the radial direction and a center line of the stator tooth in the radial direction; the angle is fluctuated for the allowed polar arc angle.
Further, 0 < 1.5.
Furthermore, the width of the auxiliary groove is Ws, wherein Ws is more than or equal to 0.5mm and less than or equal to 1.5 mm.
Furthermore, the groove depth of the auxiliary groove is Wb, and the magnetic conduction distance of the auxiliary groove is Hsb, wherein Hsb is not less than Wb and not more than 2 Wb.
Further, a center line of the stator tooth portion in the radial direction of the stator body and a center line of the auxiliary slot on the stator tooth portion in the radial direction of the stator body have a polar arc angle satisfying the following formula: when alpha 2/alpha 1 is less than 0.65, alpha 3 is 0.5 multiplied by alpha 2-, Hsb is 1.7Wb, wherein alpha 1 is the pole arc angle of the stator; alpha 2 is the pole arc angle of the stator tooth part; α 3 is a polar arc angle of a center line of the auxiliary slot in the radial direction and a center line of the stator tooth in the radial direction; the allowable polar arc angle fluctuation angle is obtained; wb is the groove depth of the auxiliary groove; hsb is the magnetic distance of the auxiliary groove.
Further, the stator tooth portion is a plurality of, and a plurality of stator tooth portions set up on the inner peripheral surface of stator body uniformly, have all seted up the auxiliary groove on each stator tooth portion.
Further, the cross section of the auxiliary groove is square, triangular, semicircular or trapezoidal.
According to another aspect of the present invention, there is provided an electric machine comprising a stator as described above.
Further, the motor further includes: and the rotor is rotatably arranged in the stator body, and the center line of the auxiliary groove along the radial direction is far away from the center line of the stator tooth part towards the opposite direction of the rotation direction of the rotor.
By applying the technical scheme of the invention, the stator of the motor comprises a stator body, the stator body is provided with a stator tooth part, and the stator tooth part is provided with an auxiliary groove. The auxiliary slots are arranged on the end faces of the stator teeth in a penetrating manner along the length direction of the stator teeth, and the center line of the stator teeth along the radial direction of the stator body and the center line of the auxiliary slots on the stator teeth along the radial direction of the stator body have a polar arc angle. The auxiliary groove is arranged, so that excessive magnetic saturation generated in the process that the magnetic conduction channel is close to the stator pole shoe can be relieved. The magnetic pressure drop of the auxiliary groove part is basically equal to the redundant part of magnetic saturation, so that the effects that the torque output of the motor is basically unchanged and the iron loss is greatly reduced can be realized, and the performance of the motor is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view showing the structure of magnetic lines of force when a stator of a motor is not provided with auxiliary slots in the prior art;
fig. 2 is a schematic view showing a structure in which magnetic lines of force pass through auxiliary slots of the motor according to the present invention;
FIG. 3 is a schematic structural view of a first embodiment of the auxiliary tank of FIG. 2;
FIG. 4 is a schematic structural view of a second embodiment of the auxiliary tank of FIG. 2;
FIG. 5 is a schematic structural view of a third embodiment of the auxiliary tank of FIG. 2;
FIG. 6 is a schematic structural view of a fourth embodiment of the auxiliary tank of FIG. 2;
FIG. 7 is a schematic structural view of an embodiment five of the auxiliary tank of FIG. 2;
FIG. 8 shows a schematic structural diagram of an embodiment of the motor of FIG. 2;
FIG. 9 is a graph showing a comparison of iron loss of a motor with and without an auxiliary slot; and
fig. 10 shows a comparison of motor output torque with and without an auxiliary slot.
Wherein the figures include the following reference numerals:
10. a stator body; 11. a stator tooth portion; 12. a stator slot; 13. a stator yoke; 14. a pole shoe; 20. an auxiliary groove; 30. a rotor; 31. a magnetic conduction channel; 32. a shaft hole; 33. a magnetic flux barrier; 34. a radial rib.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
As shown in fig. 2 and 3, according to an embodiment of the present invention, there is provided a stator of an electric machine. The stator comprises a stator body 10, wherein the stator body 10 is provided with a stator tooth part 11, and an auxiliary groove 20 is formed in the stator tooth part 11. The auxiliary slots 20 are opened in the end faces of the stator teeth 11 so as to penetrate in the longitudinal direction of the stator teeth 11, and the center line of the stator teeth 11 in the radial direction of the stator body 10 and the center line of the auxiliary slots 20 in the stator teeth in the radial direction of the stator body 10 have a polar arc angle.
In the present embodiment, the provision of the auxiliary slot 20 can serve to alleviate excessive magnetic saturation of the magnetic conductive path during approaching the stator pole shoe. The magnetic pressure drop of the auxiliary groove 20 part is basically equal to the redundant part of the magnetic saturation, and the effects that the torque output of the motor is basically unchanged and the iron loss is greatly reduced can be realized.
Wherein, the polar arc angle between the central line of the stator tooth part 11 along the radial direction of the stator body 10 and the central line of the auxiliary slot 20 on the stator tooth part along the radial direction of the stator body 10 satisfies the following formula: when α 2/α 1 < 0.65, α 3 is 0.5 × α 2 — where α 1 is a pole arc angle of the stator, α 2 is a pole arc angle of the stator teeth 11, and α 3 is a pole arc angle of a center line of the auxiliary slot 20 in the radial direction and a center line of the stator teeth 11 in the radial direction, which is an allowable pole arc angle fluctuation angle. The stator teeth 11 are added with auxiliary slots 20, the principle is as follows: the synchronous reluctance motor relies on magnetic pull to generate output torque, as shown in fig. 1: the magnetic lines of force are illustrated without the auxiliary groove. As can be seen from fig. 1, when the stator magnetic lines pass through the pole shoes on both sides of the stator tooth portion 11, the magnetic flux density is over-saturated (indicated by 4 magnetic lines in the figure) due to the small magnetic conductive area, and usually can reach more than 2.2T. At this time, the iron loss increases significantly, and the output torque fails to be increased due to saturation. As shown in fig. 2: when the auxiliary groove 20 is added, the magnetic resistance of the path through which the magnetic lines of force pass at that position is increased by the presence of the auxiliary groove 20, saturation of magnetic flux density is alleviated (indicated by 3 lines of magnetic force in the figure), and after the iron loss is significantly reduced, the torque output is almost unchanged.
Preferably, in order to be able to improve the performance of the motor stator, the allowable pole arc angle fluctuation angle setting range of the auxiliary slots 20 is defined as: 0 is less than or equal to 1.5.
As shown in FIG. 3, in order to further improve the performance of the motor stator, the width of the auxiliary slots 20 is Ws, wherein 0.5mm ≦ Ws ≦ 1.5 mm. The groove depth of the auxiliary groove 20 is Wb, and the magnetic conduction distance of the auxiliary groove 20 is Hsb, wherein Hsb is greater than or equal to Wb and less than or equal to 2 Wb. The size of Ws can be selected according to the air gap between the stator and the rotor of the motor, when the air gap is larger, the upper limit value of Ws can be taken, and when the air gap is smaller, the lower limit value of Ws can be taken. Hsb should also take into account the strength requirements of the stator teeth 11 while taking into account the above distance requirements.
Preferably, fig. 9 and 10 are graphs showing simulated iron loss comparison and torque comparison of the synchronous reluctance motor by adding the auxiliary slots and not adding the auxiliary slots, wherein the positions and the size schemes of the auxiliary slots are as follows: 1.2, Ws 1.4, and Hsb 1.7 Wb. As can be seen from the graph, the iron loss of the motor is reduced by 13%, the torque output is reduced by only 1%, and the overall performance of the motor is improved. At high frequency, the motor with the auxiliary groove has more obvious advantages.
The stator teeth 11 are provided in plurality, the plurality of stator teeth 11 are uniformly disposed on the inner circumferential surface of the stator body 10, and each stator tooth 11 is provided with an auxiliary groove 20. This arrangement also effectively improves the performance of the motor stator.
According to another embodiment of the present invention, a center line of the stator tooth 11 in the radial direction of the stator body 10 and a center line of the auxiliary slot 20 on the stator tooth in the radial direction of the stator body 10 have a polar arc angle satisfying the following formula: when α 2/α 1 is less than 0.65, α 3 is 0.5 × α 2 — Hsb is 1.7Wb, where α 1 is a pole arc angle of the stator, α 2 is a pole arc angle of the stator tooth 11, α 3 is a pole arc angle of a center line of the auxiliary slot 20 in the radial direction and a center line of the stator tooth 11 in the radial direction, is an allowable pole arc angle fluctuation angle, and Wb is a slot depth of the auxiliary slot 20; hsb is the magnetic distance of the auxiliary slot 20. The magnetic flux density saturation can be reasonably relieved by the arrangement, and the level of minimum influence on the output torque of the motor is achieved.
As shown in fig. 4 to 7, in the present embodiment, in order to achieve smooth transition of magnetic lines of force, the edge stress of the mold is reduced. The cross-section of the auxiliary groove 20 may be provided in a square, triangle, semicircle or trapezoid shape.
The motor stator in the above embodiment may also be used in the technical field of motor equipment, that is, according to another embodiment of the present invention, a motor is provided. The motor includes a stator. The stator is the stator in the above embodiment. The stator comprises a stator body 10, the stator body 10 is provided with a stator tooth part 11, and an auxiliary groove 20 is formed in the stator tooth part 11. The auxiliary slots 20 are opened in the end faces of the stator teeth 11 so as to penetrate in the longitudinal direction of the stator teeth 11, and the center line of the stator teeth 11 in the radial direction of the stator body 10 and the center line of the auxiliary slots 20 in the stator teeth in the radial direction of the stator body 10 have a polar arc angle.
As shown in fig. 3 and 8, the motor further includes a rotor 30. The rotor 30 is rotatably provided in the stator body 10, and the center line of the auxiliary slot 20 in the radial direction is away from the center line of the stator tooth portion 11 toward the opposite direction of the rotation of the rotor 30. Wherein the arrows in fig. 3 point to the direction of rotation of the rotor 30. It is worth pointing out that the polar arc angles mentioned above all refer to electrical angles, equal to the product of the number P of homopolar pairs of the corresponding mechanical angles.
The synchronous reluctance machine comprises a stator and a rotor 30, wherein the stator has a plurality of stator teeth 11 and stator yokes 13 which are uniformly distributed on the circumference, and the stator slots 12 are formed by surrounding the circumferentially adjacent stator teeth 11 and stator yokes 13. The rotor 30 is rotatably arranged at the inner side of the stator through a shaft hole 32, the rotor 30 is provided with a plurality of magnetic flux barriers 33 which are hollowed out or filled with non-magnetic conductive substances, both sides of each magnetic flux barrier 33 are provided with magnetic conductive channels 31, and the magnetic flux barriers 33 and the magnetic conductive channels 31 are alternately radially stacked and circumferentially and uniformly distributed to obtain the integral rotor 30. The synchronous reluctance is obviously characterized in that the machine does not contain any permanent magnets. Radial ribs 34 are formed between the flux barriers 33. Wherein the stator teeth 11 are provided with pole shoes 14.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A stator for an electric machine, comprising:
the stator structure comprises a stator body (10), wherein the stator body (10) is provided with a stator tooth part (11), an auxiliary groove (20) is formed in the stator tooth part (11), the auxiliary groove (20) is penetratingly formed in the end face of the stator tooth part (11) along the length direction of the stator tooth part (11), and a central line of the stator tooth part (11) along the radial direction of the stator body (10) and a central line of the auxiliary groove (20) in the stator tooth part along the radial direction of the stator body (10) form a polar arc angle.
2. A stator according to claim 1, characterized in that the stator teeth (11) have a pole arc angle with the centre line of the auxiliary slot (20) on the stator teeth in the radial direction of the stator body (10) which satisfies the following formula:
when α 2/α 1 is less than 0.65, α 3 is 0.5 × α 2-,
wherein,
the alpha 1 is a polar arc angle of the stator;
α 2 is a pole arc angle of the stator tooth (11);
α 3 is a polar arc angle of a center line of the auxiliary slot (20) in the radial direction and a center line of the stator tooth portion (11) in the radial direction;
the allowed polar arc angle fluctuation angle is shown.
3. The stator of claim 2, wherein 0 < 1.5.
4. Stator according to claim 1, characterized in that the slot width of the auxiliary slots (20) is Ws, wherein 0.5mm ≦ Ws ≦ 1.5 mm.
5. The stator according to claim 1, characterized in that the auxiliary slot (20) has a slot depth Wb, and the auxiliary slot (20) has a magnetic conducting distance Hsb, wherein Wb ≦ Hsb ≦ 2 Wb.
6. A stator according to claim 1, characterized in that the stator teeth (11) have a pole arc angle with the centre line of the auxiliary slot (20) on the stator teeth in the radial direction of the stator body (10) which satisfies the following formula:
when alpha 2/alpha 1 is less than 0.65,
α3＝0.5×α2-，
Hsb＝1.7Wb，
wherein,
the alpha 1 is a polar arc angle of the stator;
α 2 is a pole arc angle of the stator tooth (11);
α 3 is a polar arc angle of a center line of the auxiliary slot (20) in the radial direction and a center line of the stator tooth portion (11) in the radial direction;
the allowable polar arc angle fluctuation angle is defined;
wb is the groove depth of the auxiliary groove (20);
hsb is the magnetic conduction distance of the auxiliary groove (20).
7. The stator according to claim 1, wherein the number of the stator teeth (11) is plural, the plural stator teeth (11) are uniformly provided on an inner peripheral surface of the stator body (10), and the auxiliary slot (20) is opened on each of the stator teeth (11).
8. A stator according to claim 1, characterized in that the cross-section of the auxiliary slot (20) is square, triangular, semi-circular or trapezoidal.
9. An electrical machine comprising a stator, wherein the stator is as claimed in any one of claims 1 to 8.
10. The electric machine of claim 9, further comprising:
a rotor (30), the rotor (30) being rotatably disposed within the stator body (10), a center line of the auxiliary slot (20) in a radial direction being away from a center line of the stator tooth portion (11) toward an opposite direction of a rotation direction of the rotor (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551824.7A CN106130203B (en) | 2016-07-11 | 2016-07-11 | Stator and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610551824.7A CN106130203B (en) | 2016-07-11 | 2016-07-11 | Stator and motor with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106130203A true CN106130203A (en) | 2016-11-16 |
| CN106130203B CN106130203B (en) | 2019-01-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610551824.7A Active CN106130203B (en) | 2016-07-11 | 2016-07-11 | Stator and motor with same |
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| Country | Link |
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| CN (1) | CN106130203B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649767A (en) * | 2018-06-05 | 2018-10-12 | 广东工业大学 | A kind of construction method of magneto and its model |
| CN113381523A (en) * | 2021-07-14 | 2021-09-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, stator and motor |
| TWI770903B (en) * | 2021-03-26 | 2022-07-11 | 東元電機股份有限公司 | Stator tooth with stator tooth cut arc structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000299947A (en) * | 1999-04-09 | 2000-10-24 | Mitsubishi Heavy Ind Ltd | Reluctance motor |
| JP2005192263A (en) * | 2003-12-24 | 2005-07-14 | Matsushita Electric Ind Co Ltd | Permanent magnet motor |
| JP2008271713A (en) * | 2007-04-20 | 2008-11-06 | Toyota Motor Corp | Stator core and motor |
| JP2013128378A (en) * | 2011-12-19 | 2013-06-27 | Mitsubishi Electric Corp | Permanent magnet type rotary electric machine |
| CN204425060U (en) * | 2015-01-15 | 2015-06-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and compressor |
| CN205864086U (en) * | 2016-07-11 | 2017-01-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator and there is its motor |
-
2016
- 2016-07-11 CN CN201610551824.7A patent/CN106130203B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649767A (en) * | 2018-06-05 | 2018-10-12 | 广东工业大学 | A kind of construction method of magneto and its model |
| TWI770903B (en) * | 2021-03-26 | 2022-07-11 | 東元電機股份有限公司 | Stator tooth with stator tooth cut arc structure |
| CN113381523A (en) * | 2021-07-14 | 2021-09-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, stator and motor |
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| Publication number | Publication date |
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| CN106130203B (en) | 2019-01-04 |
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Effective date of registration: 20181101 Address after: No. six, Qianshan Jinji West Road, Zhuhai, Guangdong Province Applicant after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Address before: 519070 9 Building (Science and technology building) 789 Jinji Road, Qianshan, Zhuhai, Guangdong Applicant before: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI |
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