CN113972760A - Permanent magnet synchronous motor vibration damping and noise reduction stator - Google Patents
Permanent magnet synchronous motor vibration damping and noise reduction stator Download PDFInfo
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- CN113972760A CN113972760A CN202111272279.5A CN202111272279A CN113972760A CN 113972760 A CN113972760 A CN 113972760A CN 202111272279 A CN202111272279 A CN 202111272279A CN 113972760 A CN113972760 A CN 113972760A
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- 230000009467 reduction Effects 0.000 title claims abstract description 17
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 15
- 238000013016 damping Methods 0.000 title claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 7
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 7
- 230000010349 pulsation Effects 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
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- 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)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a permanent magnet synchronous motor vibration damping and noise reduction stator, which comprises: the stator comprises a stator core, a stator core and a stator core, wherein the stator core is provided with a plurality of wire grooves extending along the axial direction of a stator, the wire grooves are separated by stator tooth parts, and the inner end surfaces of the stator tooth parts are provided with clamping grooves extending along the axial direction of the stator; the outer surface of the iron core lining is attached to the inner end face of each stator tooth part, and the outer surface of the iron core lining is provided with a clamping part matched with the clamping groove; the iron core lining is fixedly connected with the stator tooth parts through clamping the clamping part in the clamping groove. The motor notch is blocked by adopting a stator core lining structure with the same magnetic conduction material as the motor stator. Therefore, the material of the notch is the same as that of the tooth part, the magnetic conductivity of the notch is better, and compared with the magnetic wedge, the method can effectively eliminate torque pulsation, reduce the cogging torque of the motor and achieve the aim of reducing vibration and noise of the motor.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to a permanent magnet synchronous motor vibration and noise reduction stator.
Background
The permanent magnet synchronous motor has the characteristics of small heat generation, high power efficiency, low noise and the like, has relatively excellent limit rotating speed and braking characteristics, and is preferably and widely applied to pumps, fans, electric vehicles and the like. However, the motor often generates noise along with vibration during operation. Whether the performance and the quality of the motor are excellent or not is evaluated, the vibration noise characteristic is very important in all evaluation standards, abnormal vibration can aggravate friction inside the motor, loss is increased, and the service life of the motor is further influenced.
The interaction between the permanent magnet of the permanent magnet motor and the armature tooth slot easily causes air gap flux density distortion, brings serious tooth slot torque effect, causes torque pulsation, and influences the vibration noise of the motor and the control performance and precision of a system.
At present, the common methods for vibration and noise reduction of the permanent magnet synchronous motor comprise: the influence of vibration noise on the motor is reduced by selecting different shapes, outer diameters, types of iron cores and matching modes among the slots of the stator. By adopting the stator slot and rotor magnetic pole combination, the sectional slot design and the stator slot or rotor magnetic pole inclined structure, although the cogging torque can be greatly reduced and the vibration noise of the motor can be reduced, the manufacturing difficulty of the structures is higher, and the processing cost is increased. The cogging torque can be inhibited by adopting the combination of the permanent magnets with different thicknesses and the asymmetric permanent magnets, so that the vibration noise of the motor is reduced, but because the periodicity of a magnetic field of the motor is damaged by the asymmetric structure, unbalanced magnetic pull force is generated, and although the cogging torque and the torque fluctuation of the motor are reduced, the electromagnetic vibration noise of the motor can be higher than that of the original motor. Compared with the prior art, the structure of the stator without the slot opening can greatly reduce the torque of the slot and the torque pulsation of the motor, thereby reducing the vibration noise of the motor, and the motor is of a symmetrical structure and does not generate unbalanced magnetic pull force.
The study of scholars at home and abroad on the permanent magnet synchronous motor to reduce the cogging torque and reduce the noise of the permanent magnet synchronous motor mainly aims at the split armature structure and has less design on the integral armature structure without the cogging torque. Although the split armature structure is convenient for realizing the wire inserting processing of the wound winding in the slotless motor, the method can lead the armature punching sheet processing procedure to be complex. When each block of assembly of the armature is connected, the split armature structure usually adopts connection modes such as adhesives or keys, the assembly is arc-direction assembly, errors such as dislocation are easy to generate, the processing cost of the motor is increased, the stator can be eccentric, and the vibration noise of the motor is increased. And, considering the processing cost and the processing technology, the split armature structure is only suitable for small-batch processing production.
The permanent magnet synchronous motor stator core inner surface fluting design, the effect of considering the tooth's socket torque, the stator notch is generally designed lessly, has greatly increased the motor wire winding technology degree of difficulty, makes motor winding very low in the machine in batches in the process of winding, and the too low groove filling rate can lead to the winding line space and with the clearance between the core not filled by the lacquer base, and the heat is difficult for effluvium to cause trouble such as winding short circuit.
Disclosure of Invention
The invention aims to provide a vibration and noise reduction stator of a permanent magnet synchronous motor, which adopts a stator core lining structure with the same magnetic conduction material as a motor stator and blocks a motor notch. Therefore, the material of the notch is the same as that of the tooth part, the magnetic conductivity of the notch is better, and compared with the magnetic wedge, the method can effectively eliminate torque pulsation, reduce the cogging torque of the motor and achieve the aim of reducing vibration and noise of the motor.
The technical scheme of the invention is that the permanent magnet synchronous motor vibration damping and noise reduction stator comprises:
the stator comprises a stator core, a stator core and a stator core, wherein the stator core is provided with a plurality of wire grooves extending along the axial direction of a stator, the wire grooves are separated by stator tooth parts, and the inner end surfaces of the stator tooth parts are provided with clamping grooves extending along the axial direction of the stator;
the outer surface of the iron core lining is attached to the inner end face of each stator tooth part, and the outer surface of the iron core lining is provided with a clamping part matched with the clamping groove; the iron core lining is fixedly connected with the stator tooth parts through clamping the clamping part in the clamping groove.
The invention is further improved in that the inner end surfaces of the stator tooth parts extend along the circumferential direction of the stator core to form wing plates, and gaps are reserved between the edges of the wing plates of the adjacent stator tooth parts to serve as notches of the wire grooves.
The invention has the further improvement that the clamping part is a dovetail wedge extending along the axial direction of the stator, and the clamping groove is a dovetail groove matched with the clamping part.
The invention has the further improvement that the clamping groove and the clamping part are matched, and the cross section of the clamping groove is semicircular, similar to rectangular or triangular.
The invention is further improved in that the stator core is formed by pressing silicon steel sheets.
The invention is further improved in that the iron core inner lining is formed by pressing silicon steel sheets with the same material as the stator iron core.
The invention has the beneficial effects that:
(1) because the iron core is lined with the special structure, the notch of the primary stator of the armature winding can be enlarged properly in design, so that the motor is more convenient to embed wires, the labor intensity of workers is reduced, and the efficiency is improved.
(2) By adopting the design of the slotless motor, the cogging torque of the motor can be effectively inhibited, the torque ripple and the air gap flux density waveform distortion are reduced, and the performance and the precision of the system are improved.
(3) The problem of stator eccentricity easily caused by the fact that each block of assembly of the armature needs to be connected in the traditional split armature structure of the slotless motor is effectively solved. The iron core lining device is suitable for motors of different types and sizes, has high universality, and can greatly reduce the vibration of the motor and reduce the noise of the motor.
Drawings
FIG. 1 is a perspective view of a damping and noise-reducing stator of the permanent magnet synchronous motor of the present embodiment;
fig. 2 is a perspective view of a stator core;
FIG. 3 is a perspective view of a core liner;
FIG. 4 is a mesh division by finite element analysis of the motor after the stator structure of the present embodiment is adopted;
fig. 5 is a comparison of cogging torque waveforms of the motor using the stator structure of the present embodiment.
Detailed Description
Example (b): as shown in fig. 1, the present embodiment provides a stator with vibration and noise reduction for a permanent magnet synchronous motor, which is suitable for, but not limited to, a brushless dc motor, a hybrid excitation motor, etc. Which comprises a stator core 10 and a core liner 20. The core liner 20 is provided on an inner surface of the stator core 10 to fixedly connect the stator teeth 12. The core liner 20 has a cylindrical shape on the inside thereof for receiving a rotor of the motor.
As shown in fig. 1 to 3, a plurality of slots 11 extending along the axial direction of the stator are formed in a stator core 10, the slots 11 are separated by stator teeth 12, and the stator teeth 12 extend inward for winding a stator winding. The inner end face of the stator tooth portion 12 faces the iron core lining, and a clamping groove 13 extending along the axial direction of the stator is formed in the inner end face. An opening is arranged at the top end or the bottom end of the clamping groove 13.
As shown in fig. 1 and 2, the core liner 20 has a cylindrical shape. The outer surface of which abuts the inner end surface of each stator tooth 12. The outer surface of the core liner 20 is provided with a fastening portion 21 adapted to the fastening groove 13. The core liner 20 is fixedly connected to each of the stator tooth portions 12 by engaging the engaging portion 21 in the engaging groove 13.
The cross sections of the locking groove 13 and the locking portion 21 are adapted, and may be in a semicircular, rectangular-like, triangular or polygonal structure. In a specific embodiment, the fastening portion 21 is a dovetail wedge extending along the axial direction of the stator, and the slot 13 is a dovetail groove adapted to the fastening portion 21. The stator iron core is formed by punching a silicon steel sheet into a corresponding specific stator shape by a machine and laminating the stator iron core according to a certain laminating coefficient. The core liner 20 is also formed by pressing a silicon steel sheet having the same material as the stator core 10.
The inner end surfaces of the stator teeth 12 extend in the circumferential direction of the stator core 10 to form wings 14, and gaps are left between the edges of the wings 14 of adjacent stator teeth 12 as slots 15 of the slots 11. The outer surface of the iron core lining can be fixedly connected with the stator iron core 10 to form a slotless stator structure by splicing, thereby inhibitingThe cogging torque of the motor is manufactured, the vibration noise of the motor is effectively reduced, and the performance and the precision of the system are improved. And the slot width L of the slot 15 due to the presence of the core liner1The motor winding wire winding device can be properly adjusted and amplified according to the winding requirement of a motor winding, and is convenient for machine winding and manual winding. The iron core lining can save the traditional slot wedge structure, improve the space in the slot, and improve the full rate of the motor slot, thereby improving the efficiency and the power density of the motor.
The integral structure of the stator is shown in figure 1 and is formed by splicing a stator iron core 10 part and an iron core lining 20 part, and the special dovetail-shaped notch arrangement can enable the two parts to be spliced to form a PMSM vibration reduction and noise reduction structure without using an adhesive additionally.
This example takes a 4-pole 6-slot surface-mounted permanent magnet motor as an example. As shown in fig. 4, the stator includes six windings and the rotor has 4 pieces of magnets. Finite element simulation analysis is carried out on two motor structures through ANSYS Maxwell software, a PMSM vibration reduction and noise reduction type structure is adopted for motor grid division in figure 4, and in order to ensure accurate analysis results, the iron core lining part in the figure is particularly subjected to encryption division processing.
The motor cogging torque concrete simulation method comprises the following steps: the motor speed is set to rotate at a constant speed of 1 deg./s and the current in the motor armature winding is set to zero. The cogging torque waveform of the motor with the PMSM vibration reduction and noise reduction structure and the cogging torque waveform of the motor with the PMSM vibration reduction and noise reduction structure can be obtained, wherein the cogging torque is the peak value of the cogging torque waveform in one electric period, as shown in FIG. 5. As can be seen in the figure, the cogging torque of the motor with the slots is 4.9068N · m, the cogging torque of the motor without the slots is 2.7595N · m, the cogging torque of the motor is effectively inhibited, the magnitude of the cogging torque is weakened by nearly 44%, and the effectiveness of the vibration-damping and noise-reducing structure of the embodiment is verified.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. The utility model provides a stator of making an uproar falls in permanent magnet synchronous machine damping which characterized in that includes:
the stator comprises a stator core (10), wherein a plurality of wire slots (11) extending along the axial direction of a stator are formed in the stator core, the wire slots (11) are separated by stator tooth parts (12), and clamping grooves (13) extending along the axial direction of the stator are formed in the inner end surfaces of the stator tooth parts (12);
the iron core lining (20) is cylindrical, the outer surface of the iron core lining is attached to the inner end face of each stator tooth part (12), and the outer surface of the iron core lining (20) is provided with a clamping part (21) matched with the clamping groove (13); the iron core lining (20) is fixedly connected with the stator tooth parts (12) by clamping and fixing parts (21) in the clamping grooves (13).
2. The stator of claim 1, wherein the inner end surfaces of the stator teeth (12) extend along the circumferential direction of the stator core (10) to form wing plates (14), and gaps are left between the edges of the wing plates (14) of the adjacent stator teeth (12) to serve as notches (15) of the wire slots (11).
3. The stator of claim 1, wherein the clamping part (21) is a dovetail wedge extending along the axial direction of the stator, and the slot (13) is a dovetail groove adapted to the clamping part (21).
4. The stator of claim 1, wherein the slot and the locking portion are adapted to each other, and the slot has a semicircular, rectangular-like or triangular cross section.
5. The permanent magnet synchronous motor vibration and noise reduction stator according to claim 1, wherein the stator core (10) is formed by pressing silicon steel sheets.
6. The stator of claim 5, characterized in that the core liner (20) is formed by pressing silicon steel sheets with the same material as the stator core (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272279.5A CN113972760A (en) | 2021-10-29 | 2021-10-29 | Permanent magnet synchronous motor vibration damping and noise reduction stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272279.5A CN113972760A (en) | 2021-10-29 | 2021-10-29 | Permanent magnet synchronous motor vibration damping and noise reduction stator |
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| Publication Number | Publication Date |
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| CN113972760A true CN113972760A (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111272279.5A Pending CN113972760A (en) | 2021-10-29 | 2021-10-29 | Permanent magnet synchronous motor vibration damping and noise reduction stator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116599266A (en) * | 2023-05-31 | 2023-08-15 | 山东博诚电气有限公司 | Stator notch fixing structure for reducing magnetic pole loss of motor rotor |
| CN117318359A (en) * | 2023-09-04 | 2023-12-29 | 安徽致钲电驱动技术有限公司 | Winding outlet structure of multiphase flat wire motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201403038Y (en) * | 2009-03-12 | 2010-02-10 | 林慧生 | Direct-flow type permanent magnetic brushless motor |
| JP2013133538A (en) * | 2011-12-27 | 2013-07-08 | Hitachi Metals Ltd | Roll for hot dip metal plating bath |
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
| CN109347220A (en) * | 2018-11-23 | 2019-02-15 | 上海航天控制技术研究所 | A kind of spliced stator structure of extremely low cogging torque |
| CN208939682U (en) * | 2018-10-22 | 2019-06-04 | 深圳市歌尔泰克科技有限公司 | A kind of closed slot stator core, motor stator and motor |
| CN110912294A (en) * | 2019-11-07 | 2020-03-24 | 南京埃斯顿自动化股份有限公司 | Tooth-boot separation type permanent magnet motor stator core, permanent magnet motor and assembling method |
-
2021
- 2021-10-29 CN CN202111272279.5A patent/CN113972760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201403038Y (en) * | 2009-03-12 | 2010-02-10 | 林慧生 | Direct-flow type permanent magnetic brushless motor |
| JP2013133538A (en) * | 2011-12-27 | 2013-07-08 | Hitachi Metals Ltd | Roll for hot dip metal plating bath |
| CN107959361A (en) * | 2016-10-18 | 2018-04-24 | 中国科学院宁波材料技术与工程研究所 | The stator of permanent magnet torque motor and the permanent magnet torque motor with high torque density |
| CN208939682U (en) * | 2018-10-22 | 2019-06-04 | 深圳市歌尔泰克科技有限公司 | A kind of closed slot stator core, motor stator and motor |
| CN109347220A (en) * | 2018-11-23 | 2019-02-15 | 上海航天控制技术研究所 | A kind of spliced stator structure of extremely low cogging torque |
| CN110912294A (en) * | 2019-11-07 | 2020-03-24 | 南京埃斯顿自动化股份有限公司 | Tooth-boot separation type permanent magnet motor stator core, permanent magnet motor and assembling method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116599266A (en) * | 2023-05-31 | 2023-08-15 | 山东博诚电气有限公司 | Stator notch fixing structure for reducing magnetic pole loss of motor rotor |
| CN116599266B (en) * | 2023-05-31 | 2024-02-06 | 山东博诚电气有限公司 | Stator notch fixing structure for reducing magnetic pole loss of motor rotor |
| CN117318359A (en) * | 2023-09-04 | 2023-12-29 | 安徽致钲电驱动技术有限公司 | Winding outlet structure of multiphase flat wire motor |
| CN117318359B (en) * | 2023-09-04 | 2024-05-10 | 安徽致钲电驱动技术有限公司 | Winding outlet structure of multiphase flat wire motor |
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Address after: 200240 No. 690, Jiangchuan Road, Shanghai, Minhang District Applicant after: SHANGHAI DIANJI University Applicant after: Zhejiang Jufeng Technology Co.,Ltd. Address before: 200240 No. 690, Jiangchuan Road, Shanghai, Minhang District Applicant before: SHANGHAI DIANJI University Applicant before: Zhejiang Jufeng Technology Co.,Ltd. |