CN116742845B - Stator and rotor structure for reducing vibration and noise and switched reluctance motor - Google Patents
Stator and rotor structure for reducing vibration and noise and switched reluctance motor Download PDFInfo
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- CN116742845B CN116742845B CN202310548644.3A CN202310548644A CN116742845B CN 116742845 B CN116742845 B CN 116742845B CN 202310548644 A CN202310548644 A CN 202310548644A CN 116742845 B CN116742845 B CN 116742845B
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- 230000007704 transition Effects 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 5
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 230000010349 pulsation Effects 0.000 abstract description 17
- 230000008859 change Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration 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
- 230000009467 reduction Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- 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)
- Synchronous Machinery (AREA)
Abstract
The invention relates to the technical field of switched reluctance motors, in particular to a stator and rotor structure of a switched reluctance motor. The stator and rotor iron core is formed by laminating silicon steel sheets; a transition angle is arranged at the top end of the tooth part of the stator core; the rotor magnetic pole shoe comprises three sections of circular arcs; three non-uniform air gap areas are formed between the stator and rotor structures. According to the invention, three uneven air gap areas are formed by changing the stator and rotor structure, so that the uniformity of inductance change rate is increased, the content of other harmonic magnetic densities is weakened on the premise of increasing fundamental magnetic density, the torque pulsation of the motor is reduced, and the electromagnetic noise is reduced.
Description
Technical Field
The invention relates to the technical field of switch reluctance motors, in particular to a stator and rotor structure for reducing vibration and noise of a switch reluctance motor.
Background
The switch reluctance motor is a special motor which appears along with the continuous development of the power electronic technology, has higher electromechanical integration degree, simple motor structure, low manufacturing cost, good starting performance, high running efficiency and good control system stability, and becomes a member of the total potential of the variable speed drive system.
However, since the magnetic circuit inside thereof has a nonlinear structure and the switching characteristics of the control circuit vary with the period, the electromagnetic performance inside thereof differs from that of a general three-phase motor in terms of operational performance. Compared with other motors, the switched reluctance motor has larger noise, the structure of a stator and a rotor and a switch-type power supply, and the switched reluctance motor driving system is also made into a system with high variable coupling and serious nonlinear abnormality, and the torque pulsation in operation is quite obvious, so that the motor noise and the torque pulsation are caused, and the application of the switched reluctance motor in occasions with higher operation quality requirements is directly influenced.
At present, a design method and an optimization method for a switched reluctance motor are mature, but in motor operation performance analysis, torque pulsation and vibration noise of the switched reluctance motor still have problems, so that a stator and rotor structure of the switched reluctance motor needs to be reasonably improved. The stator and rotor structure determines the air gap appearance, and the motor air gap structure determines the running performance of the motor, so the design of the stator and rotor structure has very important position in the field of switch reluctance motor design. The design of the rotor pole shoe shape by adopting three-section arc is proposed abroad at the earliest, the magnetic pole shoe shape of the large-scale hydraulic generator is improved by applying the three-section arc design principle at home, and the three-section arc is designed to ensure that the change of the air gap length is changed from an obvious transition area, so that the running performance of the motor is improved. Therefore, the design method for improving the three-section arc has very important significance in the field of design of stator and rotor of the switch reluctance motor. Therefore, the optimization of stator tooth and rotor pole arc parameters is aimed at, so that the reduction of torque pulsation and vibration noise suppression are of great significance.
Disclosure of Invention
The invention aims to improve the internal stator-rotor structure of a switched reluctance motor, reduce torque pulsation, inhibit motor vibration and noise and overcome the defects of the prior art. According to the invention, the stator and rotor structure is optimally designed, so that the air gap has a transition section with uneven length, the harmonic content of the air gap flux density is reduced, the torque pulsation is effectively restrained, and the torque pulsation and noise of the motor are reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a stator-rotor structure for reducing torque pulsation and vibration noise of a switched reluctance motor comprises a stator-rotor iron core, wherein the stator-rotor iron core is formed by laminating silicon steel sheets; the stator core comprises a stator yoke part and a stator tooth part, the width of the stator yoke part is the same as the width of the 1/3 height part of the stator tooth part, two ends of the tooth top of the stator tooth part are provided with transition angles, and the transition angles comprise a first plane and a second plane included angle and a second plane and a tooth part arc surface included angle; the first plane is connected with the second plane; the first plane is connected with the tail end of the tooth part of the stator; the second plane is connected with the arc surface of the tooth part. The rotor iron core comprises a rotor yoke part and rotor magnetic poles, and the rotor magnetic pole shoe comprises a first arc surface, a second arc surface, a third plane and a fourth plane; the first arc surface and the rotor arc surface have only one intersection point; the second arc surface is tangent to the first arc surface; the third arc surface is tangent to the first arc surface; the second arc surface is connected with a third plane; the third plane is connected with the magnetic pole yoke part; the third arc surface is connected with the fourth plane; the fourth plane is connected with the magnetic pole yoke.
Further, the included angle between the second plane and the arc surface of the tooth part is theta 0 ，5≤θ 0 ≤10。
Further, the included angle between the first plane and the second plane is theta 1 ，30≤θ 1 ≤45。
Further, the length of the air gap between the tooth arc surface and the rotor arc surface is delta 0 。
Further, the length of the air gap between the first arc surface and the rotor arc surface is delta α 。
Further, the air gap length between the second arc surface and the first arc surface is delta β 。
Further, the air gap delta 0 For uniform air gap, air gap delta α 、δ β Is a non-uniform air gap.
Further, a fixed groove is formed in the stator core.
Further, the rotor core yoke is provided with a fixing hole.
Further, the rotor core magnetic pole is provided with a fixing hole.
Further, the number of the fixing grooves arranged on the stator iron core is 12.
Further, the number of the fixing holes provided in the rotor core yoke is 4.
Further, the number of the fixing holes on the rotor core magnetic pole is 4.
By adopting the technology, the invention has the beneficial effects that:
according to the stator and rotor structure of the switched reluctance motor, the transition angle is arranged at the top end of the tooth part of the stator, so that the length of an air gap is changed to two sides at the wide position of the tooth part, the uniformity of the inductance change rate is improved, and torque pulsation and noise are effectively reduced; the rotor magnetic pole shoe is composed of three sections of circular arcs, the first circular arc surface and the tooth part circular arc surface form a first section of uneven air gap length, and the second circular arc surface and the third circular arc surface respectively form a second section of uneven air gap with the first circular arc surface, so that torque pulsation and noise of the motor are further suppressed; and the change rate of the air gap is more uniform along the change area from the center of the tooth part to the two sides of the tooth part, so that the harmonic content of the air gap flux density is further reduced, and the torque pulsation is improved.
Drawings
Fig. 1 is a schematic diagram of a stator and rotor structure of a conventional switched reluctance motor.
Fig. 2 is a schematic diagram of a switched reluctance motor according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of performance versus motor for an embodiment of the present invention.
Fig. 4 is an explanatory diagram of an air gap region between stator and rotor according to the present invention.
Fig. 5 is a schematic view of a rotor pole piece of the present invention.
Fig. 6 is a schematic view of the top end of the stator tooth according to the present invention.
Fig. 7 is a schematic diagram of a rotor pole piece design of the present invention.
The meaning of the labels in the figures is: 1-stator core, 2-stator tooth part, 3-stator yoke part, 4-rotor core, 5-rotor yoke part, 6-rotor magnetic pole, 7-motor rotating shaft, 8-rotor magnetic pole fixing hole, 9-rotor yoke part fixing hole, 10-stator core fixing groove, 11-tooth part arc surface, 12-first plane, 13-second plane, 14-rotor arc surface, 15-first arc surface, 16-second arc surface and 17-third arc surface.
Detailed Description
In order that the above-recited technical advantages of the invention may be more clearly understood, a more complete description of the invention will be rendered by reference to the appended drawings and to the specific embodiments thereof. The following description sets forth certain specific design details to provide a better understanding of the present invention, but may be practiced in other than the described manner, and therefore the present invention is not limited to the specific implementations disclosed below.
The method described in the patent of the present invention will be described in detail with reference to specific examples with reference to a 12-slot 8-pole switched reluctance motor, as shown in fig. 2 to 7.
Table 1 shows basic parameters of the motor.
TABLE 1
As shown in fig. 2, a stator-rotor structure for reducing torque pulsation and vibration noise of a switched reluctance motor comprises a stator core 1 and a rotor core 4, wherein the stator core and the rotor core are formed by laminating silicon steel sheets; the stator core 1 comprises a stator tooth 2 and a stator yoke 3, wherein the width of the 1/3 height of the stator tooth 2 is the same as the width of the stator yoke 3; transition angles are arranged at two ends of the tooth top of the stator tooth part 2, the transition angles comprise a first plane 12 and a second plane 13, and the first plane 12 is connected with the second plane 13; the first plane 12 is connected with the tail end of the stator tooth 2; the second plane 13 is connected with the tooth arc surface 11; the rotor core 4 comprises a rotor yoke part 5 and a rotor magnetic pole 6, and the pole shoe of the rotor magnetic pole 6 comprises a first arc surface 15, a second arc surface 16, a third arc surface 17, a third plane 18 and a fourth plane 19; the first arc surface 15 and the rotor arc surface 14 have only one intersection point; the second arc surface 16 is tangent to the first arc surface 15; the third arc surface 17 is tangent to the first arc surface 15; the second arc surface 16 is connected with a third plane 18; the third plane 18 is connected with the tail end of the rotor magnetic pole 6; the third arc surface 17 is connected with the fourth plane 19; the fourth plane 19 is connected to the rotor pole 6.
As shown in fig. 4 and 5, the pole shoe of the rotor magnetic pole 6 is designed for the rotor structure described by the invention, so that the pole shoe is composed of three sections of circular arcs, and therefore, the length change of the air gap is divided into three areas: teethThe length of the air gap between the arc surface 11 of the part and the outer arc surface 14 of the rotor is delta 0 The method comprises the steps of carrying out a first treatment on the surface of the The length of the air gap between the first arc surface 15 and the rotor arc surface 14 is delta α The method comprises the steps of carrying out a first treatment on the surface of the The length of the air gap between the second circular arc surface 16 and the first circular arc surface 15 is delta β The pole shoes are symmetrical along the center. The three sections of different air gap length changes increase the uniformity of the inductance change rate, and effectively reduce torque pulsation and noise; and the change rate of the air gap is more uniform along the change area from the center of the tooth part to the two sides of the tooth part, so that the harmonic content of the air gap flux density is further reduced, and the torque pulsation is effectively improved.
The three-section arc specific structure of the pole shoe of the rotor magnetic pole 6 is shown in fig. 5 and 7. Radius R of rotor outer arc surface 14 0 Radius R of first arc surface 15 =58.8 1 =49.6; firstly, drawing an arc of a first arc surface 15 so that the width of the arc is just equal to the width of a pole body, setting an arc end point of the first arc surface 15 as a point C, setting a center point of a rotor as a point O, and connecting the two points O, C by a dotted line to obtain a line segment OC; the edge of the pole shoe is set as a point B, two points B, C are connected, a central point M of a line segment AB is taken, a line segment OC intersected with a perpendicular bisector of the line segment BC is taken as a point K, the point K is the point where the center of the third arc surface 17 is located, and the length of the line segment CK is the radius length R of the third arc surface 17 2 =2.8. By doing so, the arc radii of both sides can be obtained respectively.
The stator structure is shown in fig. 6, a transition angle is arranged at the top end of the stator tooth part 2, the length of an air gap is changed to two sides at the wide position of the tooth part due to the existence of the transition angle, the uniformity of the inductance change rate is increased, and the torque pulsation and noise are effectively reduced; at this time, the included angle between the first plane and the second plane is θ 1 30, the angle θ between the second plane 13 and the tooth arc surface 11 0 ＝7。
The stator iron core 1 is provided with 12 fixing grooves, and the fixing grooves are positioned at the tail end of the stator tooth part 2 and are used for stacking silicon steel sheets; the rotor core 4 is provided with 8 fixing holes which are respectively positioned on the rotor yoke part 5 and the rotor magnetic poles 6, the rotor yoke part 5 is provided with 4 fixing holes, and every other magnetic pole is provided and installed; the rotor magnetic poles 6 are also provided with 4 fixing holes, and every other magnetic pole is provided with a mounting structure, so that the air gap density is changed, the torque pulsation is reduced, and the motor structure is more stable.
Fig. 2 shows a 12-slot 8-pole switched reluctance motor adopting the stator-rotor structure, namely the motor used in the new scheme.
Fig. 3 shows a switched reluctance motor with comparative performance, other structural parameters are kept unchanged, and the stator and rotor structure is a traditional switched reluctance motor structure, namely the motor used in the original scheme.
While the foregoing examples illustrate the basic logic and operational concepts of the present invention, those skilled in the art will appreciate that the present invention is not limited by the foregoing examples, and that the foregoing examples and description illustrate only the logic and concepts of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A stator and rotor structure of a switch reluctance motor for reducing vibration and noise comprises a stator and rotor iron core, wherein the stator and rotor iron core is formed by laminating silicon steel sheets; the stator iron core (1) comprises a stator yoke part (2) and a stator tooth part (3), wherein the width of the stator yoke part (2) is the same as the width of a 1/3 height part of the stator tooth part (3), transition angles are arranged at two ends of a tooth top of the stator tooth part (3), and comprise an included angle between a first plane (12) and a second plane (13) and an included angle between the second plane (13) and a tooth arc surface (11); the first plane (12) is connected with the second plane (13); the first plane (12) is connected with the tail end of the stator tooth part (3); the second plane (13) is connected with the tooth arc surface (11); the rotor core (4) comprises a rotor yoke (5) and rotor magnetic poles (6), and the rotor magnetic pole shoe comprises a first arc surface (15), a second arc surface (16), a third arc surface (17), a third plane (18) and a fourth plane (19); the first arc surface (15) and the rotor arc surface (14) have only one intersection point; the second arc surface (16) is tangential to the first arc surface (15); the third arc surface (17) is tangential to the first arc surface (15); the second arc surface (16) is connected with the third plane (18); the third plane (18) is connected with the rotor magnetic pole (6); the third arc surface (17) is connected with the fourth plane (19); the fourth plane (19) is connected to the rotor pole (6).
2. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to claim 1, wherein: the included angle between the second plane (13) and the tooth part arc surface (11) is theta 0 ，5≤θ 0 ≤10。
3. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to claim 1, wherein: the included angle between the first plane (12) and the second plane (13) is theta 1 ，30≤θ 1 ≤45。
4. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to claim 1, wherein: the length of the air gap between the tooth part arc surface (11) and the rotor outer arc surface (14) is delta 0 。
5. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to claim 1, wherein: the length of the air gap between the first arc surface (15) and the rotor arc surface (14) is delta α 。
6. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to claim 1, wherein: the length of the air gap between the second circular arc surface (16) and the first circular arc surface (15) is delta β 。
7. The switched reluctance motor stator and rotor structure for reducing vibration and noise according to any one of claims 4, 5 and 6, wherein: the air gap delta 0 For uniform air gap, air gap delta α 、δ β Is a non-uniform air gap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310548644.3A CN116742845B (en) | 2023-05-16 | 2023-05-16 | Stator and rotor structure for reducing vibration and noise and switched reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310548644.3A CN116742845B (en) | 2023-05-16 | 2023-05-16 | Stator and rotor structure for reducing vibration and noise and switched reluctance motor |
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| Publication Number | Publication Date |
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| CN116742845A CN116742845A (en) | 2023-09-12 |
| CN116742845B true CN116742845B (en) | 2024-03-15 |
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| CN202310548644.3A Active CN116742845B (en) | 2023-05-16 | 2023-05-16 | Stator and rotor structure for reducing vibration and noise and switched reluctance motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11289726A (en) * | 1998-03-31 | 1999-10-19 | Nissan Motor Co Ltd | Reluctance motor |
| CN102214958A (en) * | 2010-04-06 | 2011-10-12 | 上海海立（集团）股份有限公司 | Stator and rotor structure of permanent magnet motor |
| WO2018062656A1 (en) * | 2016-09-29 | 2018-04-05 | 한온시스템 주식회사 | Bldc motor |
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
| CN212627348U (en) * | 2020-04-30 | 2021-02-26 | 武汉市深蓝动力科技有限公司 | 2KW switch reluctance motor punching sheet |
| CN218040940U (en) * | 2022-07-07 | 2022-12-13 | 上海优睿农牧科技有限公司 | Motor stator for improving air gap magnetic field distribution and permanent magnet motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016115366A1 (en) * | 2015-08-28 | 2017-03-02 | Johnson Electric S.A. | Single-phase permanent magnet motor |
-
2023
- 2023-05-16 CN CN202310548644.3A patent/CN116742845B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11289726A (en) * | 1998-03-31 | 1999-10-19 | Nissan Motor Co Ltd | Reluctance motor |
| CN102214958A (en) * | 2010-04-06 | 2011-10-12 | 上海海立（集团）股份有限公司 | Stator and rotor structure of permanent magnet motor |
| WO2018062656A1 (en) * | 2016-09-29 | 2018-04-05 | 한온시스템 주식회사 | Bldc motor |
| CN110034616A (en) * | 2019-04-19 | 2019-07-19 | 哈尔滨理工大学 | A kind of magneto-electric coupled damping noise reduction switched reluctance machines structure |
| CN212627348U (en) * | 2020-04-30 | 2021-02-26 | 武汉市深蓝动力科技有限公司 | 2KW switch reluctance motor punching sheet |
| CN218040940U (en) * | 2022-07-07 | 2022-12-13 | 上海优睿农牧科技有限公司 | Motor stator for improving air gap magnetic field distribution and permanent magnet motor |
Non-Patent Citations (1)
| Title |
|---|
| 左曙光 ; 张耀丹 ; 钟鸿敏 ; 吴双龙 ; .爪极发电机转子结构对电磁力谐波和振动噪声的影响分析.西安交通大学学报.2018,(第03期),全文. * |
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