CN201570919U - Permanent-magnet machine for effectively eliminating cogging effect - Google Patents
Permanent-magnet machine for effectively eliminating cogging effect Download PDFInfo
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- CN201570919U CN201570919U CN2009202500815U CN200920250081U CN201570919U CN 201570919 U CN201570919 U CN 201570919U CN 2009202500815 U CN2009202500815 U CN 2009202500815U CN 200920250081 U CN200920250081 U CN 200920250081U CN 201570919 U CN201570919 U CN 201570919U
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a motor device, aiming to provide a permanent-magnet machine for effectively eliminating cogging effect. The rotor of the permanent-magnet machine adopts a surface-mounted permanent magnet and the stator thereof adopts a split structure. A stator split tooth boot part is provided with a tooth boot tip. The boot tips of the adjacent two stator splits contact with each other tightly in the circumferential direction and almost have no gap. The contact part of the stator tooth boot tips of the permanent-magnet machine forms a notch. The permanent magnet is in an eccentric constant diameter tile shape. The permanent magnet is divided into segments in the axial direction, which are placed at intervals. The permanent magnets with the same magnetic pole are dislocated according to the same circumferential direction and the width of one cogging is dislocated in all. The utility model effectively eliminates the cogging effect of the permanent-magnet machine by adopting special structural combination and has simple production technology and reduced manufacture cost.
Description
Technical field
The utility model 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.
The utility model content
The purpose of this utility model is in order to eliminate the slot effect of magneto, to provide a kind of technology comparatively simple, eliminating slot effect obvious results magneto.
The technical problem that the utility model 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 utility model 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 utility model compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
1. the utility model 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 utility model 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 utility model 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 utility model is compared 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 utility model;
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 utility model 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 utility model, 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 the utility model permanent magnet motor stator part enlarged diagram, 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 the utility model permanent magnet machine rotor 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 the utility model permanent magnet of permanent magnet motor enlarged diagram, 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 scheme described in the utility model, or those skilled in the art designing the similar techniques scheme under the inspiration of technical solutions of the utility model, and reach above-mentioned technique effect, all is to fall into protection range of the present utility model.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202500815U CN201570919U (en) | 2009-11-06 | 2009-11-06 | Permanent-magnet machine for effectively eliminating cogging effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202500815U CN201570919U (en) | 2009-11-06 | 2009-11-06 | Permanent-magnet machine for effectively eliminating cogging effect |
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| Publication Number | Publication Date |
|---|---|
| CN201570919U true CN201570919U (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202500815U Expired - Fee Related CN201570919U (en) | 2009-11-06 | 2009-11-06 | Permanent-magnet machine for effectively eliminating cogging effect |
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| CN (1) | CN201570919U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055251A (en) * | 2009-11-06 | 2011-05-11 | 天津市松正电动科技有限公司 | Permanent-magnet motor capable of effectively eliminating slot effect |
| CN109546776A (en) * | 2019-01-11 | 2019-03-29 | 浙江德马科技股份有限公司 | Permanent magnet motor rotor structure and permanent magnet motor |
-
2009
- 2009-11-06 CN CN2009202500815U patent/CN201570919U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055251A (en) * | 2009-11-06 | 2011-05-11 | 天津市松正电动科技有限公司 | Permanent-magnet motor capable of effectively eliminating slot effect |
| CN109546776A (en) * | 2019-01-11 | 2019-03-29 | 浙江德马科技股份有限公司 | Permanent magnet motor rotor structure and permanent magnet motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20131106 |