CN117375303A - Novel noise-reduction permanent magnet synchronous motor shell - Google Patents
Novel noise-reduction permanent magnet synchronous motor shell Download PDFInfo
- Publication number
- CN117375303A CN117375303A CN202311340848.4A CN202311340848A CN117375303A CN 117375303 A CN117375303 A CN 117375303A CN 202311340848 A CN202311340848 A CN 202311340848A CN 117375303 A CN117375303 A CN 117375303A
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- inner cylinder
- permanent magnet
- noise reduction
- magnet synchronous
- synchronous motor
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 238000013016 damping Methods 0.000 claims abstract description 41
- 230000009467 reduction Effects 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 4
- 230000030279 gene silencing Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The application discloses novel permanent magnet synchronous motor casing of making an uproar falls includes: the base is provided with two reinforcing ribs at the top end, and the two reinforcing ribs are parallel to each other; the damping mechanisms are arranged at four corners of the base; the bottom end of the outer side of the inner cylinder is fixedly arranged at the top ends of the two reinforcing ribs; the inner wall surface of the outer cylinder is fixedly arranged outside the outer wall of the inner cylinder; the annular grooves are arranged in a plurality, are respectively arranged on the wall surface inside the inner cylinder in an array mode, and relate to the technical field of motors. The device has the advantages that the noise is reduced to the greatest extent while the efficient operation of the motor is ensured, the dual effects of heat dissipation and noise reduction are realized, the noise reduction effect can be optimized according to specific requirements through the elastic adjustment of the damping spring, and the efficient noise reduction effect is realized.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel noise-reduction permanent magnet synchronous motor shell.
Background
In the prior art, a lot of heat and noise are generated during the operation of many motors, especially high-power motors, and in order to solve this problem, the motors are usually equipped with a heat dissipation and noise reduction system, wherein the common heat dissipation system comprises a heat dissipation plate, a fan, etc., and the noise reduction system may comprise a sound absorption material, a sound insulation shell, etc., and the motors are usually used with a motor housing and are widely applied in various fields such as industrial production, household appliances, electric vehicles, etc.
Most of the existing noise reduction systems are fixed and cannot be adjusted according to the actual running state and the using environment of the motor, which means that the effects of the noise reduction systems are the same no matter what state or environment the motor is running in, and cannot be optimized according to specific situations, for example, when the motor is running in a noise sensitive environment, the existing noise reduction systems may not provide enough noise reduction effect; on the contrary, when the noise reduction system operates in an environment insensitive to noise, the noise reduction system may be too complex or sacrifice heat dissipation performance, and often cannot be adjusted according to actual needs, and the noise reduction effect cannot be optimized according to specific situations.
Disclosure of Invention
The application provides a novel noise reduction permanent magnet synchronous motor shell, and aims to solve the problems in the background technology.
In order to achieve the above object, the present application provides a novel permanent magnet synchronous motor casing of making an uproar falls, include: the base is provided with two reinforcing ribs at the top end, and the two reinforcing ribs are parallel to each other; the damping mechanisms are arranged at four corners of the base; the bottom end of the outer side of the inner cylinder is fixedly arranged at the top ends of the two reinforcing ribs; the inner wall surface of the outer cylinder is fixedly arranged outside the outer wall of the inner cylinder; the annular grooves are arranged in a plurality and are respectively arranged on the wall surface inside the inner cylinder in an array manner; the fixing mechanisms are arranged on the wall surface inside the cylinder cover in an array mode; the hollow bulges are respectively arranged on the outer side wall surface of the outer cylinder; the end covers are arranged at two ends of the inner cylinder respectively through flanges, and a sealing rubber cushion is further arranged between the end covers and the inner cylinder.
In a possible embodiment, a plurality of said hollow projections are in communication with a plurality of said annular grooves.
In one possible embodiment, the shock absorbing mechanism includes: the fixing seats are respectively and fixedly arranged at four corners of the bottom end of the base; the top ends of the damping springs are respectively arranged at the bottom ends of the fixing seats; the top ends of the supporting legs are respectively fixedly arranged at the bottom ends of the damping springs; the adjusting component penetrates through the fixing seat and extends to the top end of the base, and the bottom end fixing is arranged at the top ends of the supporting feet.
In a possible embodiment, the adjusting assembly comprises: the bottom ends of the plurality of screw rods are respectively fixedly arranged at the top ends of the supporting legs, and the top ends extend to the top ends of the bases; and the nut is in threaded connection with the threads on the outer side of the outer wall of the screw.
In a possible embodiment, the fixing mechanism comprises: the limiting grooves are respectively formed in the inner wall surface of the inner cylinder; the torsion springs are respectively arranged on the limiting grooves; the number of the connecting rods is matched with that of the torsion springs, and two ends of the connecting rods are respectively fixed on the torsion springs; the supporting component is arranged at the limiting grooves and connected with the connecting rods.
In one possible embodiment, a plurality of the torsion springs are respectively provided with shock absorbing pads.
In one possible embodiment, the support assembly comprises: the guide grooves are respectively formed in the inner wall surface of the inner cylinder and are positioned beside the limiting grooves; the bottom ends of the supporting springs are respectively fixedly arranged at the guide grooves; the bottom ends of the damping rods are fixedly arranged at the guide grooves respectively, are positioned at the middle parts of the supporting springs and are fixedly connected with the top ends of the supporting springs; the connecting piece, a plurality of the rotatable suit in the top of connecting piece is in a plurality of the middle part of connecting rod, and the rotatable setting in the top of damping pole in bottom.
In one possible embodiment, the wall surfaces of the hollow projections and the inner cylinder are provided with a sound damping layer.
The utility model provides a pair of novel PMSM casing of making an uproar falls, the main structure of this device includes the inner tube, the urceolus, hollow arch, spacing groove and damping spring, the cooperation of inner tube and urceolus provides a confined space, wherein the hollow arch of rectangular shape sets up between inner tube and urceolus, be linked together with the spacing groove in the inner tube, be favorable to dispelling the heat and make an uproar, when the motor operates, heat can be conducted inner tube and urceolus through hollow arch, then distribute away through the spacing groove, realize the cooling effect, the structure of hollow arch and ring channel also can keep apart and absorb the noise that the rotor rotated and produce simultaneously, thereby reduce the noise volume, damping spring can adjust elasticity degree through screw rod and nut, in order to adapt to different operational environment and noise demand, in the motor operation in-process, damping spring can absorb and buffer inside vibration, thereby reduce the influence of vibration to the noise, the noise has been reduced to the maximum extent, the dual effect of dispelling the heat and making an uproar, elasticity regulation through damping spring, make an uproar effect can optimize according to specific noise demand of making an uproar.
Drawings
Fig. 1 shows a schematic structural diagram of a novel noise reduction permanent magnet synchronous motor shell provided in an embodiment of the present application;
fig. 2 shows a schematic view of a first angle structure of a novel noise reduction permanent magnet synchronous motor shell according to an embodiment of the present application;
fig. 3 is a schematic perspective sectional structure diagram of a novel noise reduction permanent magnet synchronous motor shell according to an embodiment of the present application;
fig. 4 shows a second angular structural schematic diagram of the novel noise reduction permanent magnet synchronous motor housing provided in the embodiment of the present application;
fig. 5 is a schematic diagram of a front view cross-sectional structure of a novel noise reduction permanent magnet synchronous motor shell according to an embodiment of the present application;
fig. 6 shows a schematic diagram of a partial enlarged structure of a novel noise reduction permanent magnet synchronous motor shell according to an embodiment of the present application.
In the figure: 1. the damping device comprises a base, 2, an inner cylinder, 3, an outer cylinder, 4, an annular groove, 5, a hollow protrusion, 6, an end cover, 7, a fixing seat, 8, a damping spring, 9, a supporting leg, 10, a screw, 11, a nut, 12, a limiting groove, 13, a torsion spring, 14, a connecting rod, 15, a damping pad, 16, a guide groove, 17, a supporting spring, 18, a damping rod, 19 and a connecting piece.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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. The term "two or more" includes two or more cases.
Referring to fig. 1-6, an embodiment of the present application provides a novel noise reduction permanent magnet synchronous motor housing, including: the device comprises a base 1, a damping mechanism, an inner cylinder 2, an outer cylinder 3, an annular groove 4, a fixing mechanism, a hollow bulge 5 and an end cover 6, wherein two reinforcing ribs are arranged at the top end of the base 1 and are parallel to each other; the damping mechanisms are arranged at four corners of the base 1; the bottom end of the outer side of the inner cylinder 2 is fixedly arranged at the top ends of the two reinforcing ribs; the inner wall surface of the outer cylinder 3 is fixedly arranged outside the outer wall of the inner cylinder 2; the annular grooves 4 are arranged in a plurality, and are respectively arranged on the wall surface inside the inner cylinder 2 in an array manner; the fixing mechanisms are arranged on the wall surface inside the cylinder cover in an array mode; the hollow bulges 5 are respectively arranged on the outer side wall surface of the outer cylinder 3; the two end covers 6 are respectively arranged at the two ends of the inner cylinder 2 through flanges, and a sealing rubber cushion is also arranged between the two end covers and the inner cylinder 2.
In the specific implementation process, the stator of the motor is mounted on the inner wall surface of the inner cylinder 2 through a fixing mechanism. The bottom end of the inner cylinder 2 is fixed at the top ends of the two reinforcing ribs of the base 1, and damping mechanisms are arranged at four corners of the base 1 and used for relieving vibration in the rotation process of the motor rotor. The inner wall surface of the outer cylinder 3 is fixedly arranged on the outer side of the outer wall of the inner cylinder 2 to form a protective shell. A plurality of hollow bulges 5 are arranged on the outer side wall surface of the outer cylinder 3, and the hollow bulges 5 are mutually communicated with a plurality of annular grooves 4 arranged on the wall surface inside the inner cylinder 2, so that the hot air and the external air inside the inner cylinder are conveniently exchanged, and a good heat dissipation effect is provided. The two end covers 6 are arranged at the two ends of the inner cylinder 2 through flanges, and sealing rubber gaskets are arranged between the two end covers 6 and the inner cylinder 2 so as to ensure the tightness of the inside of the motor and effectively reduce noise.
In some examples, further, the hollow protrusions 5 are communicated with the annular grooves 4, so that the hot air and the external air in the interior can be conveniently exchanged, and a good heat dissipation effect is provided.
In some examples, further, the shock absorbing mechanism includes: the fixing seats 7, the damping springs 8, the supporting legs 9 and the adjusting components are respectively and fixedly arranged at four corners of the bottom end of the base 1; the top ends of the damping springs 8 are respectively arranged at the bottom ends of the fixing seats 7; the top ends of the supporting legs 9 are respectively fixedly arranged at the bottom ends of the damping springs 8; the adjusting component extends to the top end of the base 1 through the fixing seat 7, and the bottom end is fixedly arranged at the top ends of the supporting legs 9.
In the specific implementation process, it should be noted that the fixing seats 7 are respectively installed at four corners of the bottom end of the base 1, and then the damping springs 8 can absorb and reduce vibration generated during operation of the motor, and the top ends of the supporting legs 9 are fixed at the bottom ends of the damping springs 8, so as to enhance stability of the whole system. The adjusting assembly penetrates the fixing seat 7 and extends to the top end of the base 1, and the bottom end of the adjusting assembly is fixed at the top end of the supporting leg 9. The adjusting component can adjust the height and stability of the whole damping mechanism so as to adapt to different working conditions. The whole damping mechanism can effectively reduce vibration and noise when the motor operates, and a more stable and quiet operating environment is provided.
In some examples, further, the adjustment assembly includes: the bottom ends of the screw rods 10 are fixedly arranged at the top ends of the supporting legs 9 respectively, and the top ends extend to the top end of the base 1; the nut 11 is screwed on the thread outside the outer wall of the screw 10.
In the specific implementation process, it should be noted that the nut 11 is screwed on the thread on the outer side of the outer wall of the screw rod 10, and when the elastic degree of the damping spring 8 is adjusted according to the requirement, the height of the screw rod 10 can be changed by rotating the nut 11, so that the elastic degree of the damping mechanism can be changed, and a better damping effect can be achieved. Through the mutual cooperation of the screw rod 10 and the nut 11, the working state of the motor can be flexibly adjusted to adapt to different working environments and requirements.
In some examples, further, the securing mechanism includes: the limiting grooves 12, the torsion springs 13, the connecting rods 14 and the supporting components are respectively arranged on the inner wall surface of the inner cylinder 2; the torsion springs 13 are respectively arranged on the limiting grooves 12; the number of the connecting rods 14 is matched with the number of the torsion springs 13, and two ends of the connecting rods 14 are respectively fixed on the torsion springs 13; the support assembly is mounted at a plurality of limit slots 12 and is connected to a plurality of connecting rods 14.
In the specific implementation, the limiting grooves 12 on the inner wall surface of the inner cylinder 2 are used for fixing the components and keeping them in the correct positions. The elasticity of the torsion spring 13 can help absorb and reduce vibrations generated during operation of the motor. The two ends of the connecting rods 14, which are matched in number, are fixed to the torsion springs 13, respectively. The support assembly would be mounted at the limit slot 12 and connected with the connecting rod 14 to provide additional stability, the securing mechanism being able to stabilize the motor stator and reduce vibration during motor operation, thereby improving motor operation stability and noise reduction.
In some examples, the shock-absorbing pads 15 are respectively arranged on the torsion springs 13, and the shock-absorbing pads 15 on the torsion springs 13 mainly serve to enhance the shock-absorbing effect. The torsion spring 13 can absorb and reduce vibration generated when the motor is operated, and the shock pad 15 can further improve the shock absorbing effect. The motor can absorb part of vibration which cannot be processed by the torsion spring 13, so that noise generated during motor operation is further reduced, and the motor operation is more stable and quiet.
In some examples, further, the support assembly includes: the guide grooves 16, the supporting springs 17, the damping rods 18 and the connecting pieces 19 are arranged on the inner wall surface of the inner cylinder 2, and the guide grooves 16 are positioned beside the limiting grooves 12; the bottom ends of the supporting springs 17 are fixedly arranged at the guide grooves 16 respectively; the bottom ends of the damping rods 18 are fixedly arranged at the guide grooves 16 respectively, are positioned at the middle parts of the supporting springs 17 and are fixedly connected with the top ends of the supporting springs 17; the top ends of the connecting pieces 19 are rotatably sleeved at the middle parts of the connecting rods 14, and the bottom ends are rotatably arranged at the top ends of the damping rods 18.
In a specific implementation process, the damping rod 18 and the supporting spring 17 can work cooperatively to absorb and reduce vibration during the operation process of the motor, so that the effects of stabilizing the motor and reducing noise are achieved. At the same time, the engagement member 19 provides a flexible connection between the connecting rod 14 and the damping rod 18, so that the motor remains stable in different operating conditions.
In some examples, further, the wall surfaces of the hollow protrusions 5 and the inner cylinder 2 are provided with silencing layers, and the main function of the silencing layers of the hollow protrusions 5 and the wall surfaces of the inner cylinder 2 is to absorb and reduce noise generated during motor operation. When the motor is running, vibrations inside the machine can produce noise. The sound attenuating layer is made of a material and designed to absorb these sound waves effectively, thereby reducing the transmission of noise. Thus, the motor is quieter in running, and the experience of a user is improved.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (8)
1. Novel permanent magnet synchronous motor casing of making an uproar falls, its characterized in that includes:
the base (1), the top of the base (1) is provided with two reinforcing ribs, and the two reinforcing ribs are parallel to each other;
the damping mechanisms are arranged at four corners of the base (1);
the bottom end of the outer side of the inner cylinder (2) is fixedly arranged at the top ends of the two reinforcing ribs;
an outer cylinder (3), wherein the inner wall surface of the outer cylinder (3) is fixedly arranged outside the outer wall of the inner cylinder (2);
the annular grooves (4) are arranged in a plurality, and are respectively arranged on the wall surface inside the inner cylinder (2) in an array manner;
the fixing mechanisms are arranged on the wall surface inside the cylinder cover in an array mode;
the hollow bulges (5) are respectively arranged on the outer side wall surface of the outer cylinder (3);
the end covers (6), two end covers (6) are respectively arranged at two ends of the inner cylinder (2) through flanges, and sealing rubber gaskets are further arranged between the end covers and the inner cylinder (2).
2. The novel noise reduction permanent magnet synchronous motor shell according to claim 1, wherein: the hollow bulges (5) are communicated with the annular grooves (4).
3. The novel noise reduction permanent magnet synchronous motor shell according to claim 1, wherein: the damping mechanism includes:
the fixing seats (7) are respectively fixedly arranged at four corners of the bottom end of the base (1);
the top ends of the damping springs (8) are respectively arranged at the bottom ends of the fixed seats (7);
the top ends of the supporting legs (9) are respectively fixedly arranged at the bottom ends of the damping springs (8);
the adjusting component penetrates through the fixing seat (7) and extends to the top end of the base (1), and the bottom end fixing is arranged at the top ends of the supporting legs (9).
4. A novel noise reduction permanent magnet synchronous motor housing according to claim 3, wherein: the adjustment assembly includes:
the bottom ends of the screw rods (10) are respectively fixedly arranged at the top ends of the supporting legs (9), and the top ends extend to the top end of the base (1);
and the nut (11) is in threaded connection with threads on the outer side of the outer wall of the screw (10).
5. The novel noise reduction permanent magnet synchronous motor shell according to claim 1, wherein: the fixing mechanism includes:
the limiting grooves (12) are respectively formed in the inner wall surface of the inner cylinder (2);
the torsion springs (13), a plurality of torsion springs (13) are respectively arranged on the limiting grooves (12);
the number of the connecting rods (14) is matched with the number of the torsion springs (13), and two ends of the connecting rods (14) are respectively fixed on the torsion springs (13);
the supporting components are arranged at the limiting grooves (12) and are connected with the connecting rods (14).
6. The novel noise reduction permanent magnet synchronous motor shell according to claim 5, wherein: damping pads (15) are respectively arranged on the torsion springs (13).
7. The novel noise reduction permanent magnet synchronous motor shell according to claim 5, wherein: the support assembly includes:
the guide grooves (16) are respectively formed in the inner wall surface of the inner cylinder (2), and are positioned beside the limiting grooves (12);
the bottom ends of the supporting springs (17) are fixedly arranged at the guide grooves (16) respectively;
the bottom ends of the damping rods (18) are fixedly arranged at the guide grooves (16) respectively, are positioned at the middle parts of the supporting springs (17) and are fixedly connected with the top ends of the supporting springs (17);
the connecting pieces (19) are rotatably sleeved at the middle parts of the connecting rods (14), and the bottom ends of the connecting pieces (19) are rotatably arranged at the top ends of the damping rods (18).
8. The novel noise reduction permanent magnet synchronous motor shell according to claim 1, wherein: the wall surfaces of the hollow bulges (5) and the inner cylinder (2) are provided with silencing layers.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202311340848.4A CN117375303A (en) | 2023-10-16 | 2023-10-16 | Novel noise-reduction permanent magnet synchronous motor shell |
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Application Number | Priority Date | Filing Date | Title |
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CN202311340848.4A CN117375303A (en) | 2023-10-16 | 2023-10-16 | Novel noise-reduction permanent magnet synchronous motor shell |
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CN117375303A true CN117375303A (en) | 2024-01-09 |
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CN202311340848.4A Pending CN117375303A (en) | 2023-10-16 | 2023-10-16 | Novel noise-reduction permanent magnet synchronous motor shell |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118074412A (en) * | 2024-04-19 | 2024-05-24 | 浙江佳雪微特电机有限公司 | Lubricating self-circulation permanent magnet synchronous motor |
-
2023
- 2023-10-16 CN CN202311340848.4A patent/CN117375303A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118074412A (en) * | 2024-04-19 | 2024-05-24 | 浙江佳雪微特电机有限公司 | Lubricating self-circulation permanent magnet synchronous motor |
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