CN211266724U - Permanent magnet synchronous motor end cover - Google Patents
Permanent magnet synchronous motor end cover Download PDFInfo
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- CN211266724U CN211266724U CN201921880450.9U CN201921880450U CN211266724U CN 211266724 U CN211266724 U CN 211266724U CN 201921880450 U CN201921880450 U CN 201921880450U CN 211266724 U CN211266724 U CN 211266724U
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- end cover
- reinforcing ribs
- cover body
- permanent magnet
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Abstract
The utility model relates to the field of motors, and discloses a permanent magnet synchronous motor end cover, which comprises an end cover body and a plurality of reinforcing ribs arranged on the end cover body; the end cover body is provided with an outer end surface and an inner end surface which are oppositely arranged along the axial direction of the end cover body, the outer end surface and the inner end surface are both provided with reinforcing ribs, and the reinforcing ribs arranged on the outer end surface and the reinforcing ribs arranged on the inner end surface are distributed in a way of facing to each other; the reinforcing ribs on the outer end face are arranged asymmetrically. The utility model discloses a with the strengthening rib of PMSM end cover adoption asymmetric setting, through experimental verification discovery, when the strengthening rib on the PMSM end cover adopts asymmetric setting, can effectively solve the problem that the electromagnetic wave can take place the resonance with the structural mode of motor under the motor electromagnetic excitation, reduced the noise of PMSM work.
Description
Technical Field
The utility model relates to the field of electric machines, especially, relate to a PMSM end cover.
Background
The motor comprises a shell and a stator arranged in the shell, wherein motor end covers are generally arranged at two axial ends of the motor stator shell and used for fixing and supporting a rotating shaft of the motor, so that a rotor on the rotating shaft and the stator are coaxial.
The motor end cover is designed by adding the reinforcing ribs, and a plurality of reinforcing ribs with the same structure are distributed at equal intervals along the axial direction of the motor end cover generally. And a plurality of bolts for connecting the motor end cover and the shell are also uniformly distributed along the circumferential direction of the motor end cover.
For a permanent magnet synchronous motor, under the electromagnetic excitation of the motor, the symmetrically designed motor end cover is difficult to avoid the problem of resonance of the vibration mode of the characteristic mode of the motor and the point magnetic force wave, and the electromagnetic force wave can also resonate with the structural mode of the motor, so that the noise problem of the motor is more prominent.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a PMSM end cover can solve when adopting current PMSM end cover, leads to the problem that the electromagnetic force ripples can take place the resonance with the structural mode of motor under the motor electromagnetic excitation because of the symmetrical design of motor end cover.
To achieve the purpose, the utility model adopts the following technical proposal:
a permanent magnet synchronous motor end cover comprises an end cover body and a plurality of reinforcing ribs arranged on the end cover body; the end cover body is provided with an outer end face and an inner end face which are oppositely arranged along the axial direction of the end cover body, the outer end face and the inner end face are both provided with the reinforcing ribs, and the reinforcing ribs arranged on the outer end face and the reinforcing ribs arranged on the inner end face are distributed in a one-to-one opposite mode; the reinforcing ribs on the outer end face are arranged asymmetrically.
As a preferred technical solution of the end cover of the permanent magnet synchronous motor, M reinforcing ribs are arranged on both the outer end surface and the inner end surface, where M is an odd number greater than 3;
each reinforcing rib extends along the radial direction of the end cover body towards the direction far away from the center of the end cover body.
As an optimal technical scheme of the end cover of the permanent magnet synchronous motor, a plurality of first bolt through holes are arranged on the end cover body and distributed at equal intervals along the circumferential direction of the end cover body, and the number of the first bolt through holes is larger than or equal to M.
As an optimal technical scheme of the end cover of the permanent magnet synchronous motor, the outer end face is provided with first mounting bosses corresponding to the first bolt through holes one to one, the inner end face is provided with second mounting bosses distributed along the circumference of the inner end face, and the first bolt through holes penetrate through the first mounting bosses corresponding to the first bolt through holes, the end cover body and the second mounting bosses.
As a preferred technical solution of the end cover of the permanent magnet synchronous motor, each of the reinforcing ribs has a first end and a second end which are oppositely arranged along a direction away from a central axis of the end cover body;
the inner end face is provided with a bearing chamber boss protruding towards one side of the inner end face, which is far away from the outer end face, the first end of each reinforcing rib arranged on the inner end face extends to the outer wall of the bearing chamber boss, and the second end extends to the inner wall face of the second mounting boss.
As a preferred technical solution of the above permanent magnet synchronous motor end cover, a central through hole is provided on the end cover body, an end cover flange is provided on the outer end face, a first end of each reinforcing rib provided on the outer end face extends to an outer wall of the end cover flange, and a second end extends to an outer wall of the end cover flange.
As a preferred technical solution of the above permanent magnet synchronous motor end cover, the end cover flange includes an arc-shaped boss sleeved outside the central through hole, a first boss extending from each end of the opening of the arc-shaped boss in a direction away from the center of the central through hole along a radial direction of the central through hole, and a second boss connecting one ends of the two first bosses away from the arc-shaped boss;
the first end of at least one of the ribs extends to the outer wall of one of the first bosses.
As a preferable technical solution of the end cover of the permanent magnet synchronous motor, in the M reinforcing ribs on the outer end surface, an included angle between an extending direction of at least one reinforcing rib and an extending direction of two reinforcing ribs adjacent to the reinforcing rib is different.
As a preferable technical solution of the end cover of the permanent magnet synchronous motor, in the M reinforcing ribs on the outer end surface, the extending direction of at least N reinforcing ribs intersects with the central axis of the corresponding first bolt through hole, and N is greater than or equal to 1 and less than 7.
As a preferable technical solution of the end cover of the permanent magnet synchronous motor, a maximum distance from a second end of each of the reinforcing ribs arranged on the outer end face to the outer end face is smaller than a minimum distance from an end face of the first mounting boss to the outer end face.
The utility model has the advantages that: the utility model discloses a with the strengthening rib adoption asymmetric setting on the PMSM end cover, through experimental verification discovery, when the strengthening rib on the PMSM end cover adopts asymmetric setting, can effectively solve the problem that the electromagnetic wave can take place the resonance with the structural mode of motor under the motor electromagnetic excitation, reduced the noise of PMSM work.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an eight-stage forty-eight-slot permanent magnet synchronous motor end cover according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an eight-stage forty-eight-slot permanent magnet synchronous motor end cover according to an embodiment of the present invention.
In the figure:
1. an end cap body; 10. an outer end face; 11. a first mounting boss; 111. a first bolt through hole; 12. an arc-shaped boss; 13. a first boss; 14. a second boss; 15. connecting a threaded hole; 16. a second mounting boss; 17. a bearing chamber boss; 18. an inner end surface;
21. a first reinforcing rib; 22. a second reinforcing rib; 23. a third reinforcing rib; 24. a fourth reinforcing rib; 25. Fifthly, strengthening the tendons; 26. a sixth reinforcing rib; 27. and a seventh reinforcing rib.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
The embodiment provides a permanent magnet synchronous motor end cover, which comprises an end cover body 1 and a plurality of reinforcing ribs arranged on the end cover body 1; the end cover body 1 is provided with an outer end surface 10 and an inner end surface 18 which are oppositely arranged along the axial direction of the end cover body, reinforcing ribs are arranged on the outer end surface 10 and the inner end surface 18, and the reinforcing ribs arranged on the outer end surface 10 and the reinforcing ribs arranged on the inner end surface 18 are distributed in a way of being opposite to each other; the ribs on the outer end face 10 are arranged asymmetrically.
In the embodiment, the reinforcing ribs of the end cover of the permanent magnet synchronous motor are asymmetrically arranged, and experiments prove that when the reinforcing ribs on the end cover of the permanent magnet synchronous motor are asymmetrically arranged, the problem that electromagnetic waves can resonate with the structural mode of the motor under electromagnetic excitation of the motor can be effectively solved, and the working noise of the permanent magnet synchronous motor is reduced.
Fig. 1 is a schematic structural diagram of a first end cover of an eight-stage forty-eight slot permanent magnet synchronous motor provided in this embodiment, and fig. 2 is a schematic structural diagram of a second end cover of an eight-stage forty-eight slot permanent magnet synchronous motor provided in this embodiment, and as shown in fig. 1 and fig. 2, the embodiment takes an eight-stage forty-eight slot permanent magnet synchronous motor as an example, and details of a design of a reinforcing rib on the end cover of the permanent magnet synchronous motor are described.
The outer end face 10 and the inner end face 18 are both provided with 7 reinforcing ribs, and each reinforcing rib extends along the radial direction of the end cover body 1 towards the direction far away from the center of the end cover body 1, so that the extending direction of any reinforcing rib cannot coincide with the extending directions of other reinforcing ribs, and the primary asymmetric design of the reinforcing ribs on the end cover of the permanent magnet synchronous motor is realized. For other types of permanent magnet synchronous motors, M reinforcing ribs are required to be arranged on the outer end surface 10 and the inner end surface 18, and M is an odd number larger than 3.
The end cover body 1 is provided with eight first bolt through holes 111 which are distributed along the circumferential direction at equal intervals, and the motor shell is provided with threaded holes which correspond to the first bolt through holes 111 one to one. Specifically, the outer end face 10 is provided with first mounting bosses 11 corresponding to the first bolt through holes 111 one to one, the inner end face 18 is provided with second mounting bosses 16 distributed along the circumference of the inner end face, the first bolt through holes 111 sequentially penetrate through the first mounting bosses 11, the end cover body 1 and the second mounting bosses 16 corresponding to the first bolt through holes 111, and the first bolt through holes 111 and corresponding threaded holes in the motor housing are connected through bolts so as to connect the end cover body 1 to the motor housing. As for permanent magnet synchronous motors of other models, the number of the first bolt through holes 111 is required to be equal to or greater than M.
Each reinforcing rib is provided with a first end and a second end which are oppositely arranged along the direction far away from the central axis of the end cover body 1, a bearing chamber boss 17 which is convexly arranged towards one side far away from the outer end face 10 is arranged on the inner end face 18, the first end of each reinforcing rib arranged on the inner end face 18 extends to the outer wall of the bearing chamber boss 17, and the second end extends to the inner wall surface of the second mounting boss 16.
In this embodiment, the end cap body 1 is provided with a central through hole, the outer end face 10 is provided with an end cap flange, the end cap flange includes an arc-shaped boss 12 sleeved outside the central through hole, a first boss 13 extending from each end of the opening of the arc-shaped boss 12 along the radial direction of the central through hole toward the direction away from the center of the central through hole, and a second boss 14 connecting two ends of the first bosses 13 away from the end of the arc-shaped boss 12.
As shown in fig. 1, each rib provided on the outer end face 10 has a first end extending to the outer wall of the end cap flange and a second end extending to the outer wall of the end cap flange.
Specifically, the seven beads are sequentially denoted as a first bead 21, a second bead 22, a third bead 23, a fourth bead 24, a fifth bead 25, a sixth bead 26, and a seventh bead 27 in the clockwise direction shown in fig. 1.
The first end of the fourth reinforcing rib 24 is connected to the outer wall of one of the first bosses 13, the first ends of the other reinforcing ribs are connected to the outer wall of the arc-shaped boss 12, and the third reinforcing rib 23 is arranged close to the other first boss 13.
In the present embodiment, the maximum distance from the second end of each bead provided on the outer end face 10 to the outer end face 10 is smaller than the minimum distance from the end face of the first mounting boss 11 to the outer end face 10. Through the arrangement, the reinforcing ribs are prevented from interfering the installation of the bolts for connecting the end cover of the permanent magnet synchronous motor and the motor shell.
The end cover flange is provided with a plurality of threaded connection holes 15, so that in order to avoid interference caused when the threaded connection holes 15 in the end cover flange are provided with reinforcing ribs and bolts penetrate through the threaded connection holes 15, the minimum distance from the end face of the end cover flange back to the outer end face 10 is required to be larger than the maximum distance from the first end of the reinforcing ribs to the outer end face 10.
The maximum distance from the side of the first end of each rib on the inner end surface 18, which faces away from the inner end surface 18, to the inner end surface 18 is less than the minimum distance from the end surface of the bearing chamber boss 17 to the inner end surface 18, so as to avoid interference of the ribs on the mounting of the bearing.
The maximum distance from one side of the inner end surface 18 to the inner end surface 18 of the second end of each reinforcing rib on the inner end surface 18 is smaller than the minimum distance from the end surface of the second mounting boss 16 to the inner end surface 18, so that interference caused by the reinforcing ribs on mounting of bolts for connecting the end cover of the permanent magnet synchronous motor and the motor shell is avoided.
In this embodiment, the extending direction of six ribs of the seven ribs on the outer end surface 10 intersects with the central axis of the corresponding first bolt through hole 111, and the extending direction of one rib and the central axis of the corresponding first bolt through hole 111 form a non-coplanar straight line.
The extending direction of the seventh bead 27 and the central axis of the corresponding first bolt through hole 111 form a non-coplanar straight line. Through experimental verification, the arrangement can effectively reduce the order noise of the permanent magnet synchronous motor.
For other types of permanent magnet synchronous motors, it is required that, among M reinforcing ribs on the outer end surface 10, at least the extending direction of N reinforcing ribs intersect with the central axis of the corresponding first bolt through hole 111, N is greater than or equal to 1 and less than M, and the extending direction of which reinforcing rib and the central axis of the corresponding first bolt hole form a non-coplanar straight line, which needs to be determined according to the specific type of the permanent magnet synchronous motor, and is not limited herein.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. A permanent magnet synchronous motor end cover comprises an end cover body (1) and a plurality of reinforcing ribs arranged on the end cover body (1); the end cover is characterized in that the end cover body (1) is provided with an outer end face (10) and an inner end face (18) which are oppositely arranged along the axial direction of the end cover body, the outer end face (10) and the inner end face (18) are both provided with the reinforcing ribs, and the reinforcing ribs arranged on the outer end face (10) and the reinforcing ribs arranged on the inner end face (18) are distributed in a way of being opposite to each other one by one; the reinforcing ribs on the outer end face (10) are arranged asymmetrically.
2. The PMSM end cover according to claim 1, wherein M reinforcing ribs are arranged on the outer end face (10) and the inner end face (18), M being an odd number greater than 3;
each reinforcing rib extends along the radial direction of the end cover body (1) in the direction far away from the center of the end cover body (1).
3. The end cover of the permanent magnet synchronous motor according to claim 2, wherein a plurality of first bolt through holes (111) are formed in the end cover body (1) and are distributed at equal intervals along the circumferential direction of the end cover body, and the number of the first bolt through holes (111) is greater than or equal to M.
4. The end cover of the permanent magnet synchronous motor according to claim 3, wherein the outer end face (10) is provided with first mounting bosses (11) corresponding to the first bolt through holes (111) one by one, the inner end face (18) is provided with second mounting bosses (16) distributed along the circumference of the inner end face, and the first bolt through holes (111) sequentially penetrate through the corresponding first mounting bosses (11), the end cover body (1) and the second mounting bosses (16).
5. The PMSM end cover according to claim 4, characterized in that each of the reinforcing ribs has a first end and a second end which are oppositely arranged in a direction away from the central axis of the end cover body (1);
the inner end face (18) is provided with a bearing chamber boss (17) protruding towards one side of the inner end face (18) far away from the outer end face (10), the first end of each reinforcing rib arranged on the inner end face (18) extends to the outer wall of the bearing chamber boss (17), and the second end extends to the inner wall face of the second mounting boss (16).
6. The PMSM end cover according to claim 5, wherein the end cover body (1) is provided with a central through hole, the outer end face (10) is provided with an end cover flange, a first end of each reinforcing rib arranged on the outer end face (10) extends to the outer wall of the end cover flange, and a second end extends to the outer wall of the end cover flange.
7. The permanent magnet synchronous motor end cover according to claim 6, wherein the end cover flange comprises an arc-shaped boss (12) sleeved outside the central through hole, a first boss (13) extending from each end of the opening of the arc-shaped boss (12) along the radial direction of the central through hole in the direction away from the center of the central through hole, and a second boss (14) connecting one ends of the two first bosses (13) away from the arc-shaped boss (12);
the first end of at least one reinforcing rib extends to the outer wall of one of the first bosses (13).
8. The PMSM end cover according to claim 3, wherein the included angle between the extending direction of at least one of the M reinforcing ribs on the outer end face (10) and the extending direction of two adjacent reinforcing ribs is different.
9. The end cover of the permanent magnet synchronous motor according to claim 8, wherein at least N reinforcing ribs in the M reinforcing ribs on the outer end face (10) intersect with the central axis of the corresponding first bolt through hole (111), and N is greater than or equal to 1 and less than 7.
10. The PMSM end cover according to claim 4, wherein the maximum distance from the second end of each reinforcing rib provided on the outer end face (10) to the outer end face (10) is less than the minimum distance from the end face of the first mounting boss (11) to the outer end face (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880450.9U CN211266724U (en) | 2019-11-04 | 2019-11-04 | Permanent magnet synchronous motor end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880450.9U CN211266724U (en) | 2019-11-04 | 2019-11-04 | Permanent magnet synchronous motor end cover |
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| Publication Number | Publication Date |
|---|---|
| CN211266724U true CN211266724U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921880450.9U Active CN211266724U (en) | 2019-11-04 | 2019-11-04 | Permanent magnet synchronous motor end cover |
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| CN (1) | CN211266724U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271852A (en) * | 2020-10-09 | 2021-01-26 | 中国第一汽车股份有限公司 | Permanent magnet synchronous motor end cover for reducing noise |
| CN112492460A (en) * | 2020-12-09 | 2021-03-12 | 共达电声股份有限公司 | Loudspeaker |
| CN114362420A (en) * | 2021-12-07 | 2022-04-15 | 中车永济电机有限公司 | End cover structure of fan |
| EP4175124A1 (en) | 2021-10-29 | 2023-05-03 | maxon international ag | Rotor for an external rotor motor and external rotor motor with the rotor |
-
2019
- 2019-11-04 CN CN201921880450.9U patent/CN211266724U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271852A (en) * | 2020-10-09 | 2021-01-26 | 中国第一汽车股份有限公司 | Permanent magnet synchronous motor end cover for reducing noise |
| CN112492460A (en) * | 2020-12-09 | 2021-03-12 | 共达电声股份有限公司 | Loudspeaker |
| EP4175124A1 (en) | 2021-10-29 | 2023-05-03 | maxon international ag | Rotor for an external rotor motor and external rotor motor with the rotor |
| WO2023073158A1 (en) | 2021-10-29 | 2023-05-04 | Maxon International Ag | Rotor for an outrunner motor, and outrunner motor comprising the rotor |
| CN114362420A (en) * | 2021-12-07 | 2022-04-15 | 中车永济电机有限公司 | End cover structure of fan |
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