CN102055251A - Permanent-magnet motor capable of effectively eliminating slot effect - Google Patents
Permanent-magnet motor capable of effectively eliminating slot effect Download PDFInfo
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- CN102055251A CN102055251A CN2009102280928A CN200910228092A CN102055251A CN 102055251 A CN102055251 A CN 102055251A CN 2009102280928 A CN2009102280928 A CN 2009102280928A CN 200910228092 A CN200910228092 A CN 200910228092A CN 102055251 A CN102055251 A CN 102055251A
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Abstract
The invention discloses a set of motor equipment, and aims to provide a permanent magnet motor capable of effectively eliminating a slot effect. The permanent magnet motor adopts the structure that a rotor of the permanent magnet motor is a surface-mount permanent magnet, a stator of the permanent magnet motor adopts a split structure, boot tips are arranged at tooth boots of stator splits, the boot tips of two adjacent stator splits in the circumferential direction are closely contacted with each other and barely have clearance therebetween, notches are formed at the contact parts of the boot tips of the stator tooth boots of the permanent magnet motor, the permanent magnet takes the shape of an eccentric equant tile, the permanent magnet is segmented in the axial direction, the segments of the permanent magnet are placed at intervals, the homopolar permanent magnet segments are sequentially arranged in a malposed manner in the same circumferential direction, and the total malposition distance is the width of a slot. In the permanent-magnet motor provided by the invention, a specific structural combination is adopted to effectively eliminate the slot effect of the permanent magnet motor. The permanent magnet motor provided by the invention has simple manufacturing technology and lower manufacturing cost.
Description
Technical field
The present invention relates to technical field of motors, particularly a kind of magneto with elimination slot effect structure.
Background technology
The slot effect of magneto refers to cogging torque just, be to interact between the teeth groove structure of magnetic field of permanent magnet by rotor with stator core, produce at circumferencial direction, the rotor that is magneto has a kind of trend of aliging with stator along a certain specific direction, trend can produce a kind of vibration torque thus, the electric current of this torque and stator is irrelevant, and it always attempts rotor is positioned at some settling position, torque ripple and noise when this trend will cause the motor operation.In variable speed drives, when torque frequency is consistent with the mechanical resonance frequency of stator or rotor, vibration and noise that cogging torque produces will be exaggerated.The existence of cogging torque influenced equally motor in speed control system low-speed performance and hi-Fix in the position control system.The method that solves the cogging torque pulsation problem mainly concentrates on the optimal design of motor body.
The existing method of eliminating the magneto slot effect is a lot, the mark channel process is arranged, takes magnetic slot-seal, reduces width of rebate, increases gas length, reduces air gap flux density, improves the air-gap field distribution, skewed slot, oblique numerous methods such as the utmost point or magnetic pole segmentation dislocation.Its characteristics are as follows:
1. mark channel process
This method can improve the frequency of cogging torque first-harmonic, and the cogging torque pulsating quantity is obviously reduced, and improves significantly aspect the slot effect reducing, and inserting-coil process is comparatively complicated.After having adopted fractional-slot, equate, or be not strict uniform that basic slot ripples also disappears not exclusively mutually, still has slot effect in addition in mark slot number motor along circumference if the magnetic potential of rotor magnetic pole is strict.It is asymmetric that each extremely descend winding to distribute, thereby the effective torque component of motor is cancelled, the average torque of motor also can so and corresponding reducing.When every utmost point number of teeth is few, be difficult to make fractional-slot.
2. take magnetic slot-seal, reduce width of rebate
These two kinds of schemes all help reducing of slot effect very naturally, but because the magnetic property of magnetic slot-seal material is not fine, thereby limited for the weakening degree of torque pulsation.Reduce the restriction that width of rebate is subjected to the stator winding inserting-coil process, the inductance that reduces also can increase winding of notch influences the performance (overload capacity reduction) of motor, even remain silent groove, can not eliminate slot effect fully.
3. increase gas length, reduce air gap flux density (change the magnetic pole geometry or magnetize)
Air gap flux density is very big to the key property influence of motor, for high-performance large-torque electrical machine, it is generally inadvisable to reduce air gap flux density, and the moment of motor output will descend significantly, increase gas length power of motor density is reduced, the both can cause undercapacity.
4. skewed slot, the tiltedly utmost point or magnetic pole segmentation dislocation
Usually take tiltedly to cross a stator tooth distance, can obtain certain effect.But all more after a little while, slot effect just clearly at every utmost point groove number.
Above method shows, in the motor of normal structure, constant in basic structure, when only changing magnetic system physical dimension parameter and electromagnetic parameter, meeting have certain effect to reducing slot effect, but is subjected to the restriction of the basic electric property of influence within reason, and the effect that reduces slot effect also suffers restraints, the requirement of motor can not be satisfied fully, also some more efficient methods will be adopted for this reason.
Summary of the invention
The objective of the invention is provides a kind of technology comparatively simple in order to eliminate the slot effect of magneto, eliminates slot effect obvious results magneto.
The technical problem that the present invention solves takes following technical scheme to realize:
A kind of magneto, the rotor of this motor adopts the surface-mount type permanent magnet, stator is spliced by the assembled piece type iron core, and there is the boots point in the stator piece tooth boots portion of described magneto, and the stator piece is spliced into that the boots point of adjacent two stator pieces closely contacts behind the one-piece stator.
The technical problem that the present invention solves can also take following technical scheme to realize: the boots point contact position of described adjacent two stator pieces forms notch; Described stator piece boots point thickness is between 0.1～0.5mm; The width of described notch is between 2mm～6mm; Described permanent magnet is divided into multistage in the axial direction and places at interval, and each section of homopolarity permanent magnet is by the arrangement that misplaces in proper order of same circumferencial direction; The described distance that is divided into the homopolarity permanent magnet order dislocation in a circumferential direction of multistage is: space width/(N-1), N is a hop count; Two cambered surface place circles of described permanent magnet are off-centre operation, and radius equates; Two cambered surface arc length of described permanent magnet equate; The boots point thickness of described stator is between 0.2～0.3mm; The width of described notch is between 3mm～5mm.
The present invention compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
1. the present invention adopts the piece stator structure, and coiling is convenient, and the closely contact of stator boots point forms a circle almost very close to each other in a circumferential direction, makes the teeth groove Distribution of Magnetic Field more even, and torque ripple is littler during operation.The assembly unit of stator piece forms complete circle after arriving together, and structural strength is good, is easy to make and reduce the yoke magnetic resistance, improves electric efficiency.
2. each section of homopolarity permanent magnet of the present invention space width that misplaces altogether with the stator tooth effect of cooperatively interacting, has obtained in air-gap field that magnetic is close comparatively uniformly, makes slot effect obtain remarkable improvement.
3. the present invention adopts isometrical permanent magnet, and it is low to have a processing charges, the characteristics that stock utilization is high.Compare with other shape, have tangible cost advantage and bigger magnetic flux.
4. the present invention compares conventional skewed slot, adopts modes such as magnetic slot-seal, and production technology is oversimplified, and has improved production efficiency, has also reduced product cost and management cost simultaneously.
Description of drawings
Fig. 1 is the structure chart of magneto of the present invention;
Fig. 2 is a permanent magnet motor stator part enlarged diagram shown in Figure 1;
Fig. 3 is the local schematic diagram that launches of permanent magnet machine rotor shown in Figure 1;
Fig. 4 is a permanent magnet of permanent magnet motor enlarged diagram shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described:
Shown in Fig. 1-4: 1. being stator, 2. is the boots point, 3. is permanent magnet, 4. is rotor, 5. is teeth groove, 6. is notch.
Referring to Fig. 1, be permanent magnet motor structure schematic diagram of the present invention, magneto in the present embodiment is 8 utmost points, permanent magnet 3. Surface Mount is 4. surperficial in rotor, 1. the stator of magneto is made up of 12 stator pieces, 12 stator pieces are 1. all linked with one another to be combined into circular external stator, and the boots point of adjacent two stators is closely contact 2..
Referring to Fig. 2, be permanent magnet motor stator part enlarged diagram of the present invention, adjacent two stators firmly splice by the semi-circular tongue-and-groove on stator yoke both sides, two stator boots points are closely contact also, form a circle almost very close to each other in a circumferential direction, 6. the flat U type groove that the stator tooth junction forms is notch, in the present embodiment, notch width 6. is 4mm, obtain the preferred 0.2～0.3mm of thickness of boots point behind balance processing technology difficulty and action effect, boots point contact area is very little, but action effect is different fully with the groove of remaining silent, adopt said structure that the magnetic field of teeth groove is evenly distributed, reduce leakage field between magnetic pole.
Referring to Fig. 3, launch schematic diagram for permanent magnet machine rotor of the present invention is local, 4. rotor launches the back and is rectangle, and 3. permanent magnet is affixed on rotor surface, and Fig. 3 is local signal, and 7. line is the machine shaft direction.8 utmost point permanent magnets are arranged 3. in the present embodiment, every utmost point is divided into three sections, upwards is spaced at motor shaft, and three circumference are promptly arranged, and totally 24 permanent magnets are 3..31,32,33 be the homopolarity permanent magnet 3., axially spaced-apart all is d1 in twos, and misplaces in proper order towards same circumferencial direction, dislocation in twos all is d2 at interval, the width of the teeth groove that misplaces altogether.Get axially spaced-apart d1=2mm in this preferred embodiment, the total dislocation of circumferencial direction is spaced apart 2*d2=space width=11mm, i.e. d2=5.5mm.The homopolarity permanent magnet can be divided into the N section according to the design needs, and then corresponding dislocation then is d2=space width/(N-1) at interval.
Referring to Fig. 4, be permanent magnet of permanent magnet motor enlarged diagram of the present invention, 3. permanent magnet is eccentric isometrical tile shape, two cambered surface place circles that are permanent magnet are off-centre operation, and radius equates that as R1=R2 among the figure, eccentric size is R=R2-R1=r=5mm in the present embodiment, r is the permanent magnet center thickness, and two cambered surface arc length of permanent magnet equate.
Utilize technical solutions according to the invention, or those skilled in the art designing the similar techniques scheme under the inspiration of technical solution of the present invention, and reach above-mentioned technique effect, all is to fall into protection scope of the present invention.
Claims (10)
1. magneto, the rotor of this motor adopts the surface-mount type permanent magnet, stator is spliced by the assembled piece type iron core, it is characterized in that: there is the boots point in the tooth boots portion of the stator piece of described magneto, and the stator piece is spliced into that the boots point of adjacent two stator pieces closely contacts behind the one-piece stator.
2. magneto according to claim 1 is characterized in that: the boots point contact position of described adjacent two stator pieces forms notch.
3. magneto according to claim 2 is characterized in that: the thickness of described stator boots point is between 0.1～0.5mm.
4. magneto according to claim 2 is characterized in that: the width of described notch is between 2mm～6mm.
5. according to the described magneto of one of claim 1～4, it is characterized in that: described permanent magnet is divided into multistage in the axial direction and places at interval, and each section of homopolarity permanent magnet is by the arrangement that misplaces in proper order of same circumferencial direction.
6. magneto according to claim 5 is characterized in that: the described distance that is divided into the homopolarity permanent magnet order dislocation in a circumferential direction of multistage is: space width/(N-1), N is a hop count.
7. magneto according to claim 1 is characterized in that: two cambered surface place circles of described permanent magnet are off-centre operation, and radius equates.
8. magneto according to claim 7 is characterized in that: two cambered surface arc length of described permanent magnet equate.
9. magneto according to claim 3 is characterized in that: the boots point thickness of described stator is between 0.2～0.3mm.
10. magneto according to claim 4 is characterized in that: the width of described notch is between 3mm～5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102280928A CN102055251A (en) | 2009-11-06 | 2009-11-06 | Permanent-magnet motor capable of effectively eliminating slot effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102280928A CN102055251A (en) | 2009-11-06 | 2009-11-06 | Permanent-magnet motor capable of effectively eliminating slot effect |
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| CN102055251A true CN102055251A (en) | 2011-05-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103124126A (en) * | 2013-03-22 | 2013-05-29 | 哈尔滨工业大学 | Shafting-free outer rotor permanent magnetic synchronous motor capable of reducing slot effect |
| CN103166409A (en) * | 2011-12-14 | 2013-06-19 | 元山科技工业股份有限公司 | Inner rotor motor |
| WO2017140245A1 (en) * | 2016-02-16 | 2017-08-24 | Allied Treasure Inc, Limited | Disk-type electric motor, electrically driven vehicle and method for controlling the same |
| KR20180086974A (en) * | 2017-01-24 | 2018-08-01 | 엘지이노텍 주식회사 | Motor |
| KR20190034935A (en) * | 2017-09-25 | 2019-04-03 | 엘지이노텍 주식회사 | Motor |
| CN110214405A (en) * | 2017-01-24 | 2019-09-06 | Lg伊诺特有限公司 | Motor |
| CN110380525A (en) * | 2018-04-13 | 2019-10-25 | 现代自动车株式会社 | Interior permanent magnet motors |
| CN110380528A (en) * | 2018-04-12 | 2019-10-25 | 杭州三花研究院有限公司 | The manufacturing method of stator module, motor and electrodynamic pump and stator module |
| CN113839476A (en) * | 2021-09-18 | 2021-12-24 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration plant |
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| CN201278473Y (en) * | 2008-09-27 | 2009-07-22 | 沈阳工业大学 | Permanent magnet wind power generator for combined stator structure |
| CN201570919U (en) * | 2009-11-06 | 2010-09-01 | 天津市松正电动科技有限公司 | Permanent-magnet machine for effectively eliminating cogging effect |
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| US20030201687A1 (en) * | 2002-04-26 | 2003-10-30 | Denso Corporation | Stator for an electric rotary machine |
| US20040183393A1 (en) * | 2003-03-18 | 2004-09-23 | Asmo Co., Ltd. | Stator for dynamo-electric machine |
| US20050067912A1 (en) * | 2003-09-30 | 2005-03-31 | Nidec Shibaura Corporation | Stator core, an electric motor in which it is utilized, and method of manufacturing a stator core |
| JP2006220775A (en) * | 2005-02-09 | 2006-08-24 | Shicoh Eng Co Ltd | Method of manufacturing drive unit and magnet |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166409A (en) * | 2011-12-14 | 2013-06-19 | 元山科技工业股份有限公司 | Inner rotor motor |
| CN103124126A (en) * | 2013-03-22 | 2013-05-29 | 哈尔滨工业大学 | Shafting-free outer rotor permanent magnetic synchronous motor capable of reducing slot effect |
| CN103124126B (en) * | 2013-03-22 | 2016-01-20 | 哈尔滨工业大学 | Reduce the shaftless system outer rotor permanent magnet motor of slot effect |
| US10308307B2 (en) | 2016-02-16 | 2019-06-04 | Allied Treasure Inc., Limited | Disk-type electric motor, electrically driven vehicle and method for controlling the same |
| WO2017140245A1 (en) * | 2016-02-16 | 2017-08-24 | Allied Treasure Inc, Limited | Disk-type electric motor, electrically driven vehicle and method for controlling the same |
| KR20180086974A (en) * | 2017-01-24 | 2018-08-01 | 엘지이노텍 주식회사 | Motor |
| CN110214405A (en) * | 2017-01-24 | 2019-09-06 | Lg伊诺特有限公司 | Motor |
| CN110214405B (en) * | 2017-01-24 | 2021-11-16 | Lg伊诺特有限公司 | Motor |
| US11670975B2 (en) | 2017-01-24 | 2023-06-06 | Lg Innotek Co., Ltd. | Motor having optimized gaps between magnets for improving cogging torque |
| KR102674223B1 (en) | 2017-01-24 | 2024-06-12 | 엘지이노텍 주식회사 | Motor |
| KR20190034935A (en) * | 2017-09-25 | 2019-04-03 | 엘지이노텍 주식회사 | Motor |
| KR102491351B1 (en) | 2017-09-25 | 2023-01-25 | 엘지이노텍 주식회사 | Motor |
| CN110380528A (en) * | 2018-04-12 | 2019-10-25 | 杭州三花研究院有限公司 | The manufacturing method of stator module, motor and electrodynamic pump and stator module |
| CN110380525A (en) * | 2018-04-13 | 2019-10-25 | 现代自动车株式会社 | Interior permanent magnet motors |
| CN113839476A (en) * | 2021-09-18 | 2021-12-24 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration plant |
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Application publication date: 20110511 |