CN118074368A - Stator punching sheet, stator assembly, motor and vehicle - Google Patents
Stator punching sheet, stator assembly, motor and vehicle Download PDFInfo
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- CN118074368A CN118074368A CN202211476983.7A CN202211476983A CN118074368A CN 118074368 A CN118074368 A CN 118074368A CN 202211476983 A CN202211476983 A CN 202211476983A CN 118074368 A CN118074368 A CN 118074368A
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- 238000004080 punching Methods 0.000 title claims abstract description 30
- 238000003475 lamination Methods 0.000 claims abstract description 57
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator punching sheet, a stator assembly, a motor and a vehicle, wherein the stator punching sheet comprises an inner edge part and an outer edge part which are distributed in the radial direction, the inner edge part is provided with a plurality of stator grooves which are distributed at intervals along the circumferential direction, each stator groove comprises a main body section and a notch section, the main body section is provided with a main body center line, each notch section is provided with a notch center line, the main body center line and the notch center line are arranged in an included angle, the included angle is an offset included angle, and at least two stator grooves are different in the offset included angle. The stator lamination can improve NVH performance and reduce influence on motor output capacity.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a stator punching sheet, a stator assembly, a motor and a vehicle.
Background
With the increasing expansion of new energy automobile markets, various products are in strong competition, and the demands of markets and users on new energy automobile performances are increasing, wherein one core focus is on the noise, vibration and harshness (Noise, vibration, harshness, NVH) performance of a motor, and how to improve the NVH performance of the motor is an important research field of motor designers.
At present, a conventional idea is to modify stator laminations of a motor to improve the NVH performance of the motor, but the conventional scheme can cause the output capacity of the motor to be reduced while improving the NVH performance.
Therefore, how to provide a solution to improve NVH performance and reduce the influence on the output capability of the motor is still a technical problem to be solved by those skilled in the art.
Disclosure of Invention
It is an object of the present invention to provide a stator lamination, a stator assembly, an electric machine and a vehicle, wherein the stator lamination can improve NVH performance and can reduce the influence on the output capacity of the electric machine.
In order to solve the technical problems, the invention provides a stator punching sheet, which comprises an inner edge part and an outer edge part which are distributed in the radial direction, wherein the inner edge part is provided with a plurality of stator grooves which are distributed at intervals along the circumferential direction, each stator groove comprises a main body section and a notch section, the main body section is provided with a main body center line, each notch section is provided with a notch center line, the main body center line and the notch center line are arranged in an included angle, the included angle is an offset included angle, and at least two stator grooves are different in the offset included angle.
By adopting the scheme, the main body center line of each stator slot and the slot center line are arranged at an included angle, so that the stator magnetic field can be weakened, the amplitude of harmonic wave generated by tooth slot matching can be reduced, the order force can be reduced, and the NVH performance can be improved. In addition, in each stator slot, the setting positions of the slot opening sections of at least two stator slots can be different, so that the magnetic resistance of the stator assembly is increased, the magnetic leakage of the stator in the axial direction can be reduced, the torque reduction can be reduced, and the technical purpose of ensuring the output capacity of the motor is finally realized.
Optionally, each of the stator slots forms the offset included angle of two different angles.
Optionally, the stator punching sheet comprises a plurality of magnetic poles, each magnetic pole comprises three adjacent phases, and each phase comprises a plurality of stator slots; in the same magnetic pole, at least two adjacent stator slots are different in the deviating included angle.
Optionally, each phase comprises three of said stator slots.
The invention also provides a stator assembly, which comprises a plurality of stator punching sheets which are stacked, wherein the stator punching sheets are the stator punching sheets.
Optionally, the part of the inner edge part between two adjacent stator slots is a stator tooth; in the direction of stacking and arranging the stator punching sheets, the projection of the notch section of one of the two adjacent stator punching sheets falls on the stator tooth of the other stator punching sheet, and the main body sections of the two adjacent stator punching sheets are communicated.
Optionally, in the direction in which each stator punching sheet is stacked, two adjacent stator punching sheets have the same structure, and one of the two adjacent stator punching sheets is in abutting joint with the other stator punching sheet in a turnover manner.
Optionally, in the direction in which the stator laminations are stacked, a plurality of adjacent stator laminations form a group; in the same group of stator punching sheets, the structures of two adjacent stator punching sheets are different, and each notch section is arranged in a staggered manner along the circumferential direction.
The invention also provides a motor, which comprises a stator assembly and a rotor assembly, wherein the stator assembly is the stator assembly.
The invention also provides a vehicle which comprises the motor, wherein the motor is the motor.
Drawings
FIG. 1 is a schematic view of a stator lamination according to the present invention;
FIG. 2 is a schematic view of the stator laminations on the upper layer of axially adjacent stator laminations;
FIG. 3 is a schematic view of a stator lamination positioned at a lower layer of two axially adjacent stator laminations;
FIG. 4 is an arrangement of slot segments of axially adjacent three stator laminations in one embodiment;
fig. 5 is an arrangement of slot segments of three axially adjacent stator laminations in another embodiment.
The reference numerals are explained as follows:
100-stator lamination, 110-inner rim portion, 111-stator slot, 111 a-body section, 111 b-slot section,
112-Stator teeth, 110a-W phase, 110b-U phase, 110c-V phase, 120-outer edge.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
References to orientation terms, such as "inner", "outer", etc., in the embodiments of the present invention are only with reference to the orientation of the accompanying drawings, and thus, the use of orientation terms is intended to better and more clearly describe and understand the embodiments of the present invention, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the embodiments of the present invention.
In the description of embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the description of embodiments of the invention, the term "plurality" refers to an indefinite number of pieces, typically two or more. In addition, when "a plurality" is used to indicate the number of a certain number of components, the number of the components is not related to each other.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a stator punching sheet according to the present invention.
As shown in fig. 1, the present invention provides a stator lamination 100 including an inner edge portion 110 and an outer edge portion 120 distributed in a radial direction.
The inner edge 110 is provided with a plurality of stator slots 111 arranged at intervals along the circumferential direction, and the part of the inner edge 110 between two adjacent stator slots 111 is a stator tooth 112. Alternatively, the inner edge 110 may be considered to include a plurality of stator teeth 112 arranged at intervals in the circumferential direction, and a gap between adjacent stator teeth 112 may form a stator slot 111.
Each stator tooth 112 and outer rim 120 are of unitary construction, and in some embodiments, outer rim 120 is also referred to as a yoke.
The stator slot 111 includes a main body section 111a and a slot section 111b, that is, the stator slot 111 is an open slot type, and this structural design can block the magnetic circuit inside the stator assembly, which is advantageous in preventing the reduction of the output capacity of the motor. Referring to fig. 1, the body section 111a has a body centerline, the slot section 111b has a slot centerline, and the body centerline and the slot centerline are disposed at an angle, that is, the body centerline and the slot centerline may not coincide; therefore, the stator magnetic field can be weakened, the amplitude of harmonic waves generated by tooth slot matching can be further reduced, and the technical purposes of reducing the order force and improving the NVH performance are finally achieved.
In the embodiment of the invention, the included angle between the center line of the main body and the center line of the notch can be called as an offset included angle. In each stator slot 111 of the stator plate 100, the offset included angle at which at least two stator slots 111 exist may be different, that is, the arrangement positions of the notch sections 111b at which at least two stator slots 111 may exist may be different. Therefore, the magnetic resistance of the stator assembly can be increased, the magnetic leakage of the stator in the axial direction can be reduced, the torque reduction can be further reduced, and the technical purpose of ensuring the output capacity of the motor is finally realized.
Here, the embodiment of the present invention is not limited to a specific value of the offset angle of each stator slot 111, and in practical application, a person skilled in the art may determine the offset angle in combination with specific needs, a certain test, and the like, so long as the offset angle can meet the use requirements.
In the embodiment of the present invention, the offset angles of the stator slots 111 may be all different, so as to reduce torque reduction to the greatest extent, and further ensure the output capability of the motor.
Or the deviation included angles of part of the stator slots 111 may be the same in each stator slot 111, so that the types of the stator slots 111 of the stator lamination 100 may be relatively less, the processing and preparation of the stator lamination 100 may be facilitated, and the production cost may be reduced. In one embodiment, each stator slot 111 may form two different offset angles.
The stator laminations 100 can include a plurality of poles, each of which can include three adjacent phases, a W phase 110a, a U phase 110b, and a V phase 110c, respectively, each of which can include a plurality of stator slots 111.
The offset angles of the corresponding stator slots 111, in which at least two adjacent phases exist, may be different in the same pole. In this way, the inconsistency of the positions of the notch sections 111b of each phase can be utilized to enable the magnetic density waveform of each phase to deviate in the air gap, so that the cogging effect can be weakened, the amplitude of electromagnetic force harmonic waves can be reduced to a greater extent, and the NVP performance of the motor can be improved.
The corresponding stator slots 111 refer to stator slots 111 having the same positions in two adjacent phases. Specifically, assuming that each phase includes N stator slots 111, each stator slot 111 of the W phase 100a may be respectively numbered W 1、…、Wi、…、WN, each stator slot 111 of the U phase 100b may be respectively numbered U 1、…、Ui、…、UN, wherein the stator slot 111 of the W 1 and the stator slot 111 of the U 1 may correspond, the stator slot 111 of the W i and the stator slot 111 of the U i may correspond, the stator slot 111 of the W N and the stator slot 111 of the U N may correspond, and the offset angles of these corresponding stator slots 111 may be different.
Referring to fig. 1, in the embodiment of the drawing, the numbers of the stator slots 111 of the n= 3,W phase 100a are W 1、W2 and W 3, respectively, and the numbers of the stator slots 111 of the U phase 100b are U 1、U2 and U 3, respectively. It should be understood that N is not limited to 3, that is, the number of stator slots 111 included in each phase is not limited to 3, and in specific practice, the value of N may be adjusted by those skilled in the art as required, so long as the requirement of use can be satisfied.
Example two
Referring to fig. 2-5, fig. 2 is a schematic structural diagram of an upper stator lamination of two axially adjacent stator laminations, fig. 3 is a schematic structural diagram of a lower stator lamination of two axially adjacent stator laminations, fig. 4 is an arrangement diagram of notch sections of three axially adjacent stator laminations in one embodiment, and fig. 5 is an arrangement diagram of notch sections of three axially adjacent stator laminations in another embodiment.
The present invention also provides a stator assembly, which includes a plurality of stator laminations 100 stacked and arranged, wherein the stator laminations 100 are the stator laminations 100 according to each embodiment of the first embodiment. Since the stator lamination 100 of the first embodiment has the above technical effects, the stator assembly with the stator lamination 100 also has similar technical effects, which are not described herein.
In some alternative embodiments, the body sections 111a of adjacent two stator laminations 100 can be in communication in the direction in which each stator lamination 100 is stacked, i.e., in the axial direction of the stator laminations 100, so as not to affect the placement of the stator windings; also, in the adjacent two stator laminations 100, the projection of the notch section 111b of one stator lamination may fall on the stator teeth 112 of the other stator lamination, that is, the notch sections 111b of the adjacent two stator laminations 100 may be arranged in a staggered manner in the circumferential direction, and in the direction in which the stator laminations 100 are stacked, the notch sections 111b may be in a closed structure.
By the arrangement, the air gap magnetic flux can be distorted, the technical purpose of weakening the size of harmonic waves generated by the cooperation of the slot poles can be achieved, tangential force and radial force with certain characteristic orders can be weakened, and NVH performance of the motor is improved.
Here, the embodiment of the present invention is not limited to a specific form in which the slot segments 111b of each stator punching sheet 100 are arranged in a staggered manner in the circumferential direction, and in practical application, those skilled in the art may configure the slot segments according to specific needs, so long as the slot segments can meet the use requirements.
In one embodiment, as shown in fig. 2 and 3, in the direction in which each stator lamination 100 is stacked, the structures of two adjacent stator laminations 100 may be the same, and in a specific assembly, one of the two adjacent stator laminations 100 may be turned over and bonded and butted with the other of the two adjacent stator laminations 100. In this way, the slot segments 111b of adjacent two stator laminations 100 can naturally be circumferentially offset to form an axially closed slot structure.
In such an embodiment, the stator plate 100 may be of a smaller variety, the stator plate 100 may be manufactured at a relatively lower cost, and the stator plate 100 may be assembled relatively simply.
In another embodiment, the adjacent stator laminations 100 may also be different in the stacking direction of the stator laminations 100, and the aforementioned closed slot structure may also be formed.
In practice, several adjacent stator laminations 100 in the axial direction may be grouped together. In the same group of stator laminations 100, the notch sections 111b may be sequentially staggered in the same circumferential direction, as shown in fig. 4, and at this time, the staggered notch sections 111b may form a structure similar to a "diagonal type". Alternatively, in the same stator punching group 100, each notch section 111b may be arranged in a staggered manner in different directions in the circumferential direction, as shown in fig. 5, and in this case, each notch section 111b arranged in a staggered manner may form a structure similar to a "W shape".
Table 1 comparison of parameters for different stator slots
As shown in table 1 above, comparing the stator assembly provided by the present invention with the conventional stator slot scheme, the asymmetric slot (the slot section is of an asymmetric structure), the closed slot (the slot section is totally closed) and other schemes in the prior art, it can be found that the average torque drop of the scheme provided by the present invention is very small, the torque pulsation and the order force of a specific order are improved, and the improvement on the NVH performance of the motor is obvious.
Example III
The invention also provides a motor, which comprises a stator assembly and a rotor assembly, wherein the stator assembly is the stator assembly in each implementation mode related to the second embodiment.
Since the stator assembly in the second embodiment has the above technical effects, the motor having the stator assembly also has similar technical effects, and thus will not be described herein.
Example IV
The invention also provides a vehicle comprising a motor, wherein the motor is the motor related to the third embodiment.
Since the motor in the third embodiment has the technical effects as described above, the vehicle having the motor also has similar technical effects, and thus a detailed description thereof will be omitted.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The utility model provides a stator punching, its characterized in that includes inner edge portion (110) and outer fringe portion (120) that distribute in radial, inner edge portion (110) are provided with a plurality of stator groove (111) of arranging along circumference interval, stator groove (111) are including main part section (111 a) and notch section (111 b), main part section (111 a) have the main part central line, notch section (111 b) have the notch central line, the main part central line with the notch central line is the contained angle setting, and this contained angle is the skew contained angle, exists at least two stator groove (111) skew contained angle is different.
2. A stator punching according to claim 1, characterized in that each of the stator slots (111) forms the offset included angle of two different angles.
3. The stator lamination according to claim 1 or 2, characterized in that the stator lamination (100) comprises a number of poles, each comprising three adjacent phases, each phase comprising a number of the stator slots (111);
In the same magnetic pole, at least two adjacent phases exist, and the deviation included angles of the corresponding stator grooves (111) are different.
4. A stator lamination according to claim 3, characterized in that each phase comprises three of the stator slots (111).
5. A stator assembly comprising a plurality of stator laminations (100) arranged in a stack, wherein the stator laminations (100) are the stator laminations of any one of claims 1-4.
6. The stator assembly according to claim 5, characterized in that the portion of the inner rim portion (110) between two adjacent stator slots (111) is a stator tooth (112);
in the direction in which the stator punching sheets (100) are stacked, the projection of the notch section (111 b) of one of the adjacent two stator punching sheets (100) falls on the stator tooth (112) of the other, and the main body sections (111 a) of the adjacent two stator punching sheets (100) are communicated.
7. The stator assembly of claim 6, wherein adjacent stator laminations (100) are identical in configuration in the direction in which each stator lamination (100) is stacked, one of the adjacent stator laminations (100) being in abutting engagement with the other in a flipped manner.
8. The stator assembly of claim 6, wherein a plurality of adjacent stator laminations (100) form a group in the direction in which each stator lamination (100) is stacked;
in the same group of stator punching sheets (100), the structures of two adjacent stator punching sheets (100) are different, and each notch section (111 b) is arranged in a staggered manner along the circumferential direction.
9. An electrical machine comprising a stator assembly and a rotor assembly, wherein the stator assembly is a stator assembly as claimed in any one of claims 5 to 8.
10. A vehicle comprising an electric machine, characterized in that the electric machine is the electric machine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211476983.7A CN118074368A (en) | 2022-11-23 | 2022-11-23 | Stator punching sheet, stator assembly, motor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211476983.7A CN118074368A (en) | 2022-11-23 | 2022-11-23 | Stator punching sheet, stator assembly, motor and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118074368A true CN118074368A (en) | 2024-05-24 |
Family
ID=91100879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211476983.7A Pending CN118074368A (en) | 2022-11-23 | 2022-11-23 | Stator punching sheet, stator assembly, motor and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118074368A (en) |
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2022
- 2022-11-23 CN CN202211476983.7A patent/CN118074368A/en active Pending
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