CN102510149A - Motor rotor - Google Patents
Motor rotor Download PDFInfo
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- CN102510149A CN102510149A CN2011103738377A CN201110373837A CN102510149A CN 102510149 A CN102510149 A CN 102510149A CN 2011103738377 A CN2011103738377 A CN 2011103738377A CN 201110373837 A CN201110373837 A CN 201110373837A CN 102510149 A CN102510149 A CN 102510149A
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- teeth groove
- circular arc
- rotor
- rotor according
- permanent magnet
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Abstract
The invention discloses a motor rotor. The motor rotor comprises permanent magnets, is provided with a main axis and further comprises an iron core, wherein the iron core is defined by an end wall and a lateral surface, and provided with a hole for being connected to the shaft of a motor and a plurality of longitudinal grooves for being mounted in the permanent magnets; and tooth grooves are formed on the lateral surface along the main axis. According to the invention, as the tooth grooves are formed on the outer surface of the motor rotor, the cogging force of the motor is reduced by the structure, torque pulsation is reduced, the torque control precision is improved, and meanwhile, the motor has better flux-weakening property and can run at high speed.
Description
Technical field
The present invention relates to a kind of rotor, relate in particular to a kind of embedding rotor that permanent magnet is arranged.
Background technology
As the drive motors that uses on the electric automobile, require motor when low speed, bigger torque can be provided, when high speed, not only to satisfy the requirement that runs up, can also continue simultaneously the torque that provides bigger, manufacturing has brought problems to motor design for this.
In 1973, American scholar Mallianson found a kind of peculiar permanent magnet structure when permanent magnet structure being carried out the assembly unit experiment, and calls " Magnetic Curiosity " to it.He did not perceive the using value of this structure at that time.1979, when the electronics accelerated tests is done in the magnetic field that American scholar Klaus Halbach utilizes various permanent magnet structures to produce again, found this special permanent magnet structure, and progressively improved this structure, finally formed so-called " Halbach " magnet.The Halbach magnet ring is that magnet radial and run-in index arrangement are combined; If ignore end effect; And the permeability of the permeability magnetic material around the handle is regarded infinity as; Final monolateral magnetic field (one-sided field), the characteristics that showing of Halbach that Here it is of forming of so above-mentioned magnet structure.These characteristics represent that Halbach magnet has good using value in linear electric machine.With respect to conventional motors, the Halbach motor has following several kinds of superiority: power density is big, rotor no longer needs skewed slot, rotor can adopt non-core material, permanent magnet utilance height, can use centralized winding etc.
Chinese patent discloses a kind of rotor that is used to be provided with the motor of permanent magnet for No. 200680024089.9; This rotor has main shaft and comprises range upon range of iron core; This iron core is limited first and second end walls and lateral surface, and is useful on the hole that is connected to motor reel and a plurality of be used to pack into the cannelure of each magnet; This rotor also comprises can make magnet be stabilized in the positioner in the cannelure.This technical scheme has solved the fixation problem of permanent magnet well, but still has following deficiency: the torque pulsation during low speed is high, and the torque control precision is low.
In view of this, be necessary to provide a kind of novel rotor.
Summary of the invention
To the deficiency of prior art, the technical problem that the present invention solves provides a kind of rotor, and the torque pulsation of this rotor is little, and the torque control precision is high.
For solving the problems of the technologies described above; Technical scheme of the present invention is achieved in that a kind of rotor, comprises permanent magnet, and said rotor has main shaft and comprises iron core; This iron core is limited end wall and lateral surface; And be useful on the hole that is connected to motor reel and a plurality of be used to pack into the cannelure of said each permanent magnet, wherein, said lateral surface offers teeth groove along the main shaft direction.
Preferably; In above-mentioned rotor; Said lateral surface is formed by a plurality of circular arcs that couple together, and the distance that said circular arc arc separately pushes up said main shaft equates, and each circular arc is positioned at corresponding cannelure place; Said teeth groove comprises first teeth groove, and said first septum interalveolare is distributed on the surface of said circular arc.
Preferably, in above-mentioned rotor, said first teeth groove is set to rectangle.
Preferably, in above-mentioned rotor, said teeth groove also comprises second teeth groove, and said second teeth groove is arranged between the adjacent circular arc.
Preferably, in above-mentioned rotor, the bottom surface of said second teeth groove is a circular arc, and defining the nearest point of this circular arc bottom surface and said main shaft is first point.
Preferably; In above-mentioned rotor; The said second teeth groove both sides permanent magnets adjacent is defined as first magnet and second magnet respectively; And defining on said first magnet with first nearest summit is second point, on said second magnet with first nearest summit for thirdly, said first be positioned at said second with the inboard of line thirdly.
Preferably, in above-mentioned rotor, said permanent magnet adopts the Halbach structural arrangement.
Preferably; In above-mentioned rotor; Said cannelure comprises the central region and a pair of end regions with respect to said central region formation certain angle that are used to hold corresponding permanent magnet, and said pair of end portions zone is connected to the two ends of said cannelure.
Preferably, in above-mentioned rotor, said cannelure also comprises the positioner that said permanent magnet is stabilized in said central region, and said positioner comprises a pair of retention ridge, and said a pair of retention ridge lays respectively at the both sides of said central region.
Preferably, in above-mentioned rotor, said retention ridge has the gabarit of circular arc
Compared with prior art; The present invention provides a kind of plum blossom rotor structure form that built-in Halbach permanent magnet is arranged, and the rotor outer surface has teeth groove, and this structure has reduced motor teeth groove power; Reduced torque pulsation; Improve the torque control precision, motor has weak preferably magnetic characteristic simultaneously, can realize running up of motor.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Shown in Figure 1 is the structural representation of rotor in the specific embodiment of the invention;
Fig. 2 is the partial enlarged drawing of A among Fig. 1.
Embodiment
The object of the invention is to provide a kind of rotor, and the torque pulsation of this rotor is little, and the torque control precision is high.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out detailed description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
Join shown in Figure 1ly, in the specific embodiment of the invention, rotor 1 is applicable to motor, and this motor also comprises a stator (figure does not show), and stator is included in the outside of rotor 1.
Vertically the size in hole 103 is confirmed according to the size of magnetic circuit and load.
Express six grades of rotors 1 among Fig. 1 embodiment, its iron core 10 is provided with six cannelures 104, and each cannelure is equipped with a permanent magnet 105 for 104 li.
Preferably, each permanent magnet 105 has a predetermined weight, so that carry out the balance of rotor 1 easily.
Each permanent magnet 105 all adopts the Halbach structural arrangement, refers to particularly, and two of the arrangement employings of permanent magnet 105 parallel to the axis and magnetize, and a vertical axis magnetizes.
The permanent magnet 105 that Halbach arranges is inserted in the cannelure of opening on the corresponding iron core 10 104, and this arrangement mode is Sine distribution towards air gap side magnetic field, does not almost have magnetic field towards center axis, and rotor loss is little.
In other embodiments, each permanent magnet 105 can or be lacked a bit than each self-corresponding cannelure 104 length, so that make magnetic field optimization or maximization.
Each cannelure 104 has the central region 1041 and a pair of end regions 1042 that forms a suitable angle with respect to central region 1041 that are used to hold corresponding permanent magnet 105.
The corresponding respectively two ends that form and be communicated in cannelure 104 of end regions 1042.
As is generally known these end regions 1042 are empty, specifically, it is used to prevent the leakage flux closure by permanent magnet 105 generations of 104 li of each cannelures.
At two end regions 1042, each cannelure 104 has two location ridges 1043 that are used to be guided in each permanent magnet 105 of 104 li of corresponding cannelures.
Each location ridge 1043 is made in the inner radial wall or the radial outer wall of cannelure 104 respectively or is made in simultaneously on inner radial wall and the radial outer wall.
Should be noted that in other embodiments, each locatees the gabarit that ridge 1043 can have circular arc.
The height of location ridge 1043 is lower than permanent magnet 105, so can prevent the magnet short circuit.
The lateral surface 102 of iron core 10 is made up of the interconnected circular arc 1021 of multistage, and more particularly, with regard to these six grades of rotors 1, lateral surface 102 is to be made up of six sections circular arcs 1021 with same radius.
The distance that the arc of each circular arc 1021 pushes up main shaft D equates, and each circular arc 1021 is to be positioned to along an axis setting, and this axis is substantially perpendicular to main shaft D and pass the center line of corresponding cannelure 104.
Fundamentally, each circular arc 1021 is to be positioned in corresponding cannelure 104 places.
The lateral surface of rotor 1 has rectangle first teeth groove 1023 of different numbers, and it is mainly used in the reduction torque pulsation, improves the torque control precision.
The size at interval between the size of first teeth groove 1023 and adjacent first teeth groove 1023 need cooperate with different slot numbers according to the teeth groove number of opening on each circular arc 1021 and carry out reasonable computation.
Join shown in Figure 2; Define second teeth groove, 1024 circular arc bottom surfaces and the nearest point of main shaft D is 1: 1025; Be positioned at said second teeth groove, 1024 both sides permanent magnets adjacent and be defined as first magnet and second magnet respectively; And define on first magnet with the 1: 1025 nearest summit be on 1: 1026, the second magnet with first nearest summit for thirdly 1027, the first: 1025 be positioned at 1: 1026 with the inboard of 1027 lines thirdly.That is, 1: 1025 with respect to 1: 1026 with 1027 lines thirdly on any point more near the axle center.
Above-mentioned rotor structure is fit to different slot numbers and cooperates, for example: 8 utmost points, 12 grooves, 8 utmost points, 24,8 utmost points, 48 grooves, 8 utmost points, 9 grooves, 6 utmost points, 36 grooves etc.
In sum, the present invention provides a kind of plum blossom motor rotor construction that built-in Halbach permanent magnet is arranged, and it has following advantage:
(1) permanent magnet 105 of Halbach arrangement is inserted in the cannelure of offering on the iron core 10 104, and this arrangement mode is Sine distribution towards air gap side magnetic field, does not almost have magnetic field towards center axis, and the rotor loss is little.
(2) second teeth groove 1024 are arranged between the adjacent circular arc 1021, and 1: 1025 be positioned at 1: 1026 with the inboard of 1027 lines thirdly, second teeth groove 1024 can be avoided interelectrode magnetic leakage.
(3) end regions 1042 is empty, and it is used to prevent the leakage flux closure by permanent magnet 105 generations of 104 li of each cannelures
(4) lateral surface 102 offers a plurality of first teeth groove 1023 along main shaft D direction, mainly reduces torque pulsation, improves the torque control precision.
The present invention has guaranteed that motor uses the method for vector control that bigger torque can be provided when low speed; When adopting weak magnetic control system, made full use of simultaneously reluctance torque; When improving rotating speed, the torque downward gradient is less, and this kind rotor structure is suitable for various slot numbers and cooperates.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore; No matter from which point; All should regard embodiment as exemplary; And be nonrestrictive, scope of the present invention is limited accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the present invention.Should any Reference numeral in the claim be regarded as limit related claim.
In addition; Describing according to execution mode though should be appreciated that this specification, is not that each execution mode only comprises an independently technical scheme; This narrating mode of specification only is for clarity sake; Those skilled in the art should make specification as a whole, and the technical scheme among each embodiment also can form other execution modes that it will be appreciated by those skilled in the art that through appropriate combination.
Claims (10)
1. rotor; Comprise permanent magnet; Said rotor has main shaft and comprises iron core; This iron core is limited end wall and lateral surface, and is useful on the hole that is connected to motor reel and a plurality of be used to pack into the cannelure of said each permanent magnet, and it is characterized in that: said lateral surface offers teeth groove along the main shaft direction.
2. rotor according to claim 1; It is characterized in that: said lateral surface is formed by a plurality of circular arcs that couple together; The distance that said circular arc arc separately pushes up said main shaft equates; And each circular arc is positioned at corresponding cannelure place, and said teeth groove comprises first teeth groove, and said first septum interalveolare is distributed on the surface of said circular arc.
3. rotor according to claim 2 is characterized in that: said first teeth groove is set to rectangle.
4. rotor according to claim 1 is characterized in that: said teeth groove also comprises second teeth groove, and said second teeth groove is arranged between the adjacent circular arc.
5. rotor according to claim 4 is characterized in that: the bottom surface of said second teeth groove is a circular arc, and defining the nearest point of this circular arc bottom surface and said main shaft is first point.
6. rotor according to claim 5; It is characterized in that: the said second teeth groove both sides permanent magnets adjacent is defined as first magnet and second magnet respectively; And defining on said first magnet with first nearest summit is second point; On said second magnet with first nearest summit for thirdly, said first be positioned at said second with the inboard of line thirdly.
7. rotor according to claim 1 is characterized in that: said permanent magnet adopts the Halbach structural arrangement.
8. rotor according to claim 1; It is characterized in that: said cannelure comprises the central region and a pair of end regions with respect to said central region formation certain angle that are used to hold corresponding permanent magnet, and said pair of end portions zone is connected to the two ends of said cannelure.
9. rotor according to claim 8; It is characterized in that: said cannelure also comprises the positioner that said permanent magnet is stabilized in said central region; Said positioner comprises a pair of retention ridge, and said a pair of retention ridge lays respectively at the both sides of said central region.
10. rotor according to claim 9 is characterized in that: said retention ridge has the gabarit of circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110373837.7A CN102510149B (en) | 2011-11-22 | 2011-11-22 | Motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110373837.7A CN102510149B (en) | 2011-11-22 | 2011-11-22 | Motor rotor |
Publications (2)
| Publication Number | Publication Date |
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| CN102510149A true CN102510149A (en) | 2012-06-20 |
| CN102510149B CN102510149B (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110373837.7A Active CN102510149B (en) | 2011-11-22 | 2011-11-22 | Motor rotor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821674A (en) * | 2014-01-30 | 2015-08-05 | 住友重机械工业株式会社 | Permanent magnet motor, magnetization method and manufacturing method thereof |
| CN104882978A (en) * | 2015-05-07 | 2015-09-02 | 东南大学 | Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure |
| CN105305683A (en) * | 2014-07-24 | 2016-02-03 | 西门子公司 | Rotor for electrical machine |
| CN107040109A (en) * | 2017-06-15 | 2017-08-11 | 北京航空航天大学 | Magneto torque-motor based on Halbach array |
| CN111463938A (en) * | 2020-04-14 | 2020-07-28 | 合肥工业大学 | Method for reducing magnetic flux leakage in rotor of low-speed high-torque permanent magnet synchronous motor |
| WO2022267111A1 (en) * | 2021-06-23 | 2022-12-29 | 江苏大学 | Magnetic field modulation type radial permanent magnet electric motor having high mechanical robustness, and multi-harmonic optimization design method therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024029631A (en) * | 2022-08-22 | 2024-03-06 | 山洋電気株式会社 | rotor |
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| CN1388623A (en) * | 2001-05-29 | 2003-01-01 | 株式会社日立制作所 | Electric power generator with permanent magnetic rator |
| US20030094873A1 (en) * | 1999-08-27 | 2003-05-22 | Michael Kim | Permanent magnet array and magnet holder for flywheel motor/generator |
| JP2008206308A (en) * | 2007-02-20 | 2008-09-04 | Toyota Industries Corp | Permanent-magnet rotating electric machine |
| CN101599665A (en) * | 2009-06-22 | 2009-12-09 | 哈尔滨理工大学 | A kind of rotor of permanent-magnetic wind driven generator |
| CN201388089Y (en) * | 2009-04-14 | 2010-01-20 | 东元电机股份有限公司 | Rotating device |
| CN101834476A (en) * | 2010-01-05 | 2010-09-15 | 陆美娟 | Permanent magnet generator inner rotor using Halback magnetic array |
| CN101944787A (en) * | 2009-07-10 | 2011-01-12 | 上海电驱动有限公司 | Outer surface structure of magnetic steel embedded rotor |
| CN202334047U (en) * | 2011-11-22 | 2012-07-11 | 苏州大学 | Motor rotor |
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2011
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Patent Citations (8)
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| US20030094873A1 (en) * | 1999-08-27 | 2003-05-22 | Michael Kim | Permanent magnet array and magnet holder for flywheel motor/generator |
| CN1388623A (en) * | 2001-05-29 | 2003-01-01 | 株式会社日立制作所 | Electric power generator with permanent magnetic rator |
| JP2008206308A (en) * | 2007-02-20 | 2008-09-04 | Toyota Industries Corp | Permanent-magnet rotating electric machine |
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| CN101944787A (en) * | 2009-07-10 | 2011-01-12 | 上海电驱动有限公司 | Outer surface structure of magnetic steel embedded rotor |
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| CN202334047U (en) * | 2011-11-22 | 2012-07-11 | 苏州大学 | Motor rotor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821674A (en) * | 2014-01-30 | 2015-08-05 | 住友重机械工业株式会社 | Permanent magnet motor, magnetization method and manufacturing method thereof |
| CN104821674B (en) * | 2014-01-30 | 2018-04-24 | 住友重机械工业株式会社 | Permanent magnet motor and its Magnitizing method, manufacture method |
| CN105305683A (en) * | 2014-07-24 | 2016-02-03 | 西门子公司 | Rotor for electrical machine |
| CN105305683B (en) * | 2014-07-24 | 2020-05-29 | 西门子公司 | Rotor for an electric machine |
| CN104882978A (en) * | 2015-05-07 | 2015-09-02 | 东南大学 | Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure |
| CN104882978B (en) * | 2015-05-07 | 2018-03-20 | 东南大学 | A kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure |
| CN107040109A (en) * | 2017-06-15 | 2017-08-11 | 北京航空航天大学 | Magneto torque-motor based on Halbach array |
| CN107040109B (en) * | 2017-06-15 | 2019-10-18 | 北京航空航天大学 | Magneto torque-motor based on Halbach array |
| CN111463938A (en) * | 2020-04-14 | 2020-07-28 | 合肥工业大学 | Method for reducing magnetic flux leakage in rotor of low-speed high-torque permanent magnet synchronous motor |
| WO2022267111A1 (en) * | 2021-06-23 | 2022-12-29 | 江苏大学 | Magnetic field modulation type radial permanent magnet electric motor having high mechanical robustness, and multi-harmonic optimization design method therefor |
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| CN102510149B (en) | 2015-01-14 |
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Owner name: SUZHOU DRANE ELECTRIC MOTORS CO., LTD. Free format text: FORMER OWNER: SUZHOU UNIVERSITY Effective date: 20150706 |
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Effective date of registration: 20150706 Address after: No. 2 Road, Taicang Industrial Zone, Suzhou City, 215400 Feng Shuangfeng town in Jiangsu Province Patentee after: Suzhou DRANE Electric Motors Co.,Ltd. Address before: 215123 Suzhou Industrial Park, Jiangsu Road, No. 199 Patentee before: Soochow University |
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Address after: No. two road, Taicang Industrial Zone, Suzhou City, 215400 Feng Shuangfeng town in Jiangsu Province Patentee after: Suzhou de motor Limited by Share Ltd Address before: No. 2 Road, Taicang Industrial Zone, Suzhou City, 215400 Feng Shuangfeng town in Jiangsu Province Patentee before: Suzhou DRANE Electric Motors Co.,Ltd. |