CN109256879A - A kind of Double-stator motor of ectonexine permanent magnet dislocation - Google Patents
A kind of Double-stator motor of ectonexine permanent magnet dislocation Download PDFInfo
- Publication number
- CN109256879A CN109256879A CN201811286682.1A CN201811286682A CN109256879A CN 109256879 A CN109256879 A CN 109256879A CN 201811286682 A CN201811286682 A CN 201811286682A CN 109256879 A CN109256879 A CN 109256879A
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- Prior art keywords
- stator
- permanent magnet
- rotor
- core
- double
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- 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
Abstract
The invention discloses a kind of Double-stator motors of ectonexine permanent magnet dislocation, including the external stator, rotor and inner stator being successively socketed from outside to inside, the external stator includes external stator core and the external stator coil being wrapped in external stator core slot, and the inner stator includes inner-stator iron core and the inner stator coil that is wrapped in inner-stator iron core slot；The rotor includes circular rotor core, several outer layer permanent magnets being uniformly mounted on the outside of rotor core and several internal layer permanent magnets being uniformly mounted on the inside of rotor core, and misplace certain angle between each outer layer permanent magnet and corresponding internal layer permanent magnet.Using the present invention, the cogging torque and torque ripple of motor can reduce, promote the steady-state performance and operational reliability of motor.
Description
Technical field
The invention belongs to motor fields, more particularly, to a kind of Double-stator motor of ectonexine permanent magnet dislocation.
Background technique
Double-stator permanent magnet motor is different from traditional single stator motor, has inside and outside two and exists between stator, with rotor
Inside and outside two air gaps.When motoring, the electromagnetic torque collective effect that watt current in inside and outside stator coil generates in
On rotor；When generator operation, there is induced voltage generation in inside and outside two stator coils.Therefore there is power density height, overload
The features such as ability is strong, stock utilization is high, in wind-power electricity generation, there are very high researching value and meaning in the fields such as numerically-controlled machine tool.
But existing double-stator permanent magnet motor construction comes with some shortcomings: so far, for double-stator permanent magnet
For the rotor design of motor, existing most rotor ectonexine magnetic pole is unanimously designed, such as Publication No. CN103780036A
Chinese patent literature disclosed in a kind of high-temperature superconductor permanent-magnetic wind driven generator of double-stator structure, this will cause the tooth socket of motor
Torque and torque ripple are larger, influence the Steady of motor, although and existing inside and outside stator dislocation method can inhibit tooth
Slot torque and torque ripple, but there are inconveniences in the installation of motor and the correction of inside and outside stator dislocation angle.
The Chinese patent literature of Publication No. CN104883016A discloses a kind of bimorph transducer magnetic field modulation type magneto,
Rotor is made of spaced magnetizer and non-magnetizer；External stator by external stator tooth, radial magnetizing permanent magnetism body and armature around
Group is constituted, and permanent magnet is affixed on the inner surface of external stator tooth, and the magnetizing direction of adjacent permanent magnet is opposite on same stator tooth；Inner stator
Only it is made of the inner stator tooth along the circumferential direction slotted and the armature winding being placed in slot, and without permanent magnet.The electric machine structure is logical
The rotor conductive magnetic yoke portion that saves is crossed, rotor size is reduced, reduces iron loss to improve power density and efficiency, but structure is excessively multiple
It is miscellaneous.
Therefore, the rotor topology for how designing Double-stator motor, can effectively inhibit cogging torque and torque ripple,
Again easy to produce and installation is a problem to be solved by those skilled in the art simultaneously.
Summary of the invention
In order to solve the problems existing in the prior art, the present invention provides a kind of bimorph transducer electricity of ectonexine permanent magnet dislocation
Machine can reduce the cogging torque and torque ripple of motor, promote the steady-state performance and operational reliability of motor.
The technical solution adopted by the present invention is that:
A kind of Double-stator motor of ectonexine permanent magnet dislocation, including be successively socketed from outside to inside external stator, rotor and
Inner stator, which is characterized in that the external stator includes external stator core and the external stator line being wrapped in external stator core slot
Circle, the inner stator include inner-stator iron core and the inner stator coil that is wrapped in inner-stator iron core slot；
The rotor includes circular rotor core, uniform several outer layer permanent magnetism being mounted on the outside of rotor core
Body and several internal layer permanent magnets being uniformly mounted on the inside of rotor core, each outer layer permanent magnet and corresponding internal layer permanent magnetism
Misplace certain angle between body.
Electric machine structure of the invention, when being passed through three-phase alternating current in outer, inner stator coil winding, inside and outside stator side is produced
The magnetic field of rotation has been given birth to, the rotor-side magnetic field that internal layer permanent magnet and outer layer permanent magnet generate on rotor core is driven to synchronize rotation
Turn, generates torque to realize the conversion of electric energy-mechanic energy.Outer layer permanent magnet and internal layer permanent magnet have misplaced certain angle, because
This torque ripple generated has also mutually staggered corresponding angle, the lucky phase phase of total electromagnetic torque fluctuation that the two is added
It can instead offset, reduce cogging torque and electromagnetic torque fluctuation, to improve the steady-state characteristic of motor operation.
Preferably, the angle to misplace between each outer layer permanent magnet and corresponding inside permanent magnet are as follows:
θ=(1+2k) * π/NL
Wherein, NLFor inside and outside number of stator slots QsWith the least common multiple of rotor number of poles 2p (p is rotor number of pole-pairs), k is non-
Negative integer reduces the cogging torque and torque ripple of motor so that the torque ripple that outer magnetic pole generates in rotor is cancelled out each other.
Preferably, there are outer air gaps between the external stator core and rotor, between the rotor and inner-stator iron core
There are interior air gap, air gap is uniformly distributed.
The outer air gap and interior air gap that the present invention is arranged can carry out energy exchange, have higher power density, Ke Yishi
Now bigger single-machine capacity can adjust the radial spacing of air gap and the axial length ratio of inside and outside air gap according to specific working condition requirement.
Preferably, each outer layer permanent magnet is consistent with the magnetizing direction of corresponding internal layer permanent magnet, adjacent outer layer is forever
The magnetizing direction of magnet and adjacent internal layer permanent magnet is opposite.
Preferably, the external stator core and inner-stator iron core are symmetrical along the rotor, external stator core
It is aligned one by one with the teeth portion of inner-stator iron core.
Preferably, the axial length of the external stator core and inner-stator iron core is equal.
Preferably, the external stator core and inner-stator iron core are formed by stacking by silicon steel sheet, bimorph transducer hair is reduced
The eddy-current loss of motor improves the efficiency of the generator.
The inner stator coil and external stator coil method are that conductive materials, the specific winding methods such as copper or aluminium can be according to realities
Border operating condition is designed, such as whole away from, short distance lap winding, wave winding and fractional-slot concentratred winding etc..
Furthermore, it is possible to change the turn ratio of inner-outer coil according to power distribution, the winding configuration on inside and outside stator core can
Uniting or independent design, alternating current are passed through in winding generate rotating excitation field rotor is driven to reach stable power-driven operation shape
State.
The invention has the following advantages:
1, motor of the present invention is simple by the implementation method of the inside and outside magnetic pole dislocation of rotor, can effectively inhibit the tooth socket of motor
Torque and torque ripple improve the steady-state performance of motor；
2, the inside and outside layer magnet structure of motor of the present invention is simple, easy for installation, while having very high reliable for operation
Property；
3, the winding method of the inside and outside winding of motor of the present invention can be designed according to actual operating mode, inner-outer coil
Turn ratio with power distribution change and adjust, can also be directed to inside and outside stator, winding configuration can Uniting or independent design, reach
To optimal winding combination, the efficiency and reliability of motor is improved.
4, motor of the invention has the characteristics that power density is high, and the light weight of motor under equal-wattage grade may be implemented
Change.
Detailed description of the invention
Fig. 1 is axial sectional diagrammatical view illustration of the invention；
Fig. 2 is the axial sectional diagrammatical view illustration of rotor portion of the present invention.
In figure: 1, external stator core, 2, outer layer permanent magnet, 3, rotor core, 4, internal layer permanent magnet, 5, inner-stator iron core,
6, external stator coil, 7, inner stator coil.
Specific embodiment
It is clear in order to be more clear the purpose of the present invention, technical solution and advantageous effects, below in conjunction with attached drawing into
One step detailed description of the present invention technology contents and specific embodiment.It should be understood that described in this specification specific
Embodiment is not intended to limit the present invention just for the sake of explaining the present invention.
As shown in Figure 1, a kind of double-stator permanent magnet generator of alternating poles, is as shown in the figure partial cross section, comprising: outer fixed
Sub- iron core 1, outer layer permanent magnet 2, rotor core 3, internal layer permanent magnet 4, inner-stator iron core 5, external stator coil 6 and inner stator coil
7。
As shown in Fig. 2, outer layer permanent magnet 2 is mounted on 3 outside of rotor core, internal layer permanent magnet 4 is mounted on rotor core 3
Side, outer layer permanent magnet 2 and the certain angle, θ of 4 mutual dislocation of internal layer permanent magnet.
θ=(1+2k) * π/NL
Wherein, NLFor inside and outside number of stator slots QsWith the least common multiple of rotor number of poles 2p, k=0,1,2,3 ....
In the present embodiment, all mutually it is spacedly distributed between adjacent outer layer permanent magnet and adjacent internal layer permanent magnet, phase
It can also be connected with each other between adjacent outer layer permanent magnet and adjacent internal layer permanent magnet, it can be to interval according to pole embrace difference
Size be adjusted.
Specific implementation principle of the invention is as follows:
When being passed through three-phase alternating current in external stator coil 6 and the winding of inner stator coil 7, inside and outside stator side is produced
The magnetic field of rotation drives the rotor-side magnetic field that internal layer permanent magnet 4 and outer layer permanent magnet 2 generate on rotor core 3 to synchronize rotation
Turn, generates torque to realize the conversion of electric energy-mechanic energy.Since rotor-side uses internal layer permanent magnet 4 and outer layer forever simultaneously
Magnet 2 carries out excitation, and inside and outside air gap has energy exchange, so the present invention compares single stator permanent magnet motor and has more high torque (HT) close
The characteristics of spending.
Further, since in the present invention, outer layer permanent magnet 2 and internal layer permanent magnet 4 have misplaced certain angle, therefore in interior outer gas
The torque ripple generated in gap has also mutually staggered corresponding angle, the lucky phase of total electromagnetic torque fluctuation that the two is added
It can offset on the contrary, reduce cogging torque and electromagnetic torque fluctuation, to improve the steady-state characteristic of motor operation.
Inner-stator iron core 5 is identical as 1 shape of external stator core, and symmetrically placed in rotor two sides.Inside and outside stator core exists
When installation, teeth portion is aligned one by one, and inside and outside stator core is not easily susceptible to the influence of electro-magnetic exciting force in operation, while being had and being added
Work is simple, feature easy for installation.In addition, inner-stator iron core 5 is formed with external stator core 1 by silicon steel plate stacking, to press down
The eddy-current loss of motor processed.
Inner stator coil 7, external stator coil 6 distinguish coiling in the slot in interior stator core 5 and external stator core 1.It is interior
The specific winding method of stator coil 7 and external stator coil 6 can be adjusted design according to actual operating mode, interior external stator around
The coiling of group can also same or independent design, there is very high scalability, furthermore inner stator coil 7 and external stator coil 6
Turn ratio is also adjusted with inside and outside air gap power, and fever and instability problem caused by avoiding partial power uneven are realized most
Excellent distribution combination, improves the efficiency and stability of motor operation.
Content described in this specification embodiment is only the explanation to invention, is not to limit the present invention
System, protection scope of the present invention is not construed as being only limitted to particular content described in embodiment, in spirit and original of the invention
Made any modification, replacement and change etc., are included within the scope of protection of the present invention within then.
Claims (9)
1. a kind of Double-stator motor of ectonexine permanent magnet dislocation, including external stator, the rotor and interior being successively socketed from outside to inside
Stator, which is characterized in that the external stator includes external stator core and the external stator coil being wrapped in external stator core slot,
The inner stator includes inner-stator iron core and the inner stator coil that is wrapped in inner-stator iron core slot；
The rotor include circular rotor core, be uniformly mounted on several outer layer permanent magnets on the outside of rotor core with
And be uniformly mounted on several internal layer permanent magnets on the inside of rotor core, each outer layer permanent magnet and corresponding internal layer permanent magnet it
Between exist dislocation.
2. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that each outer layer permanent magnetism
The angle to misplace between body and corresponding inside permanent magnet are as follows:
θ=(1+2k) * π/NL
Wherein, NLFor inside and outside number of stator slots QsWith the least common multiple of rotor number of poles 2p, k is nonnegative integer.
3. the double-stator permanent magnet generator of alternating poles according to claim 1, which is characterized in that the external stator core
There are outer air gaps between rotor, and there are interior air gaps between the rotor and inner-stator iron core.
4. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that each outer layer permanent magnetism
Body is consistent with the magnetizing direction of corresponding internal layer permanent magnet.
5. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that adjacent outer layer is forever
The magnetizing direction of magnet and adjacent internal layer permanent magnet is opposite.
6. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that the external stator iron
Core and inner-stator iron core are symmetrical along the rotor.
7. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that the external stator iron
The axial length of core and inner-stator iron core is equal.
8. the Double-stator motor of ectonexine permanent magnet dislocation according to claim 1, which is characterized in that the external stator iron
Core and inner-stator iron core are formed by stacking by silicon steel sheet.
9. the Double-stator motor of ectonexine permanent magnet according to claim 1 dislocation, which is characterized in that external stator coil and
The winding method of inner stator coil is integral pitch winding, short distance lap winding, wave winding or fractional-slot concentratred winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286682.1A CN109256879A (en) | 2018-10-31 | 2018-10-31 | A kind of Double-stator motor of ectonexine permanent magnet dislocation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286682.1A CN109256879A (en) | 2018-10-31 | 2018-10-31 | A kind of Double-stator motor of ectonexine permanent magnet dislocation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109256879A true CN109256879A (en) | 2019-01-22 |
Family
ID=65044422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811286682.1A Pending CN109256879A (en) | 2018-10-31 | 2018-10-31 | A kind of Double-stator motor of ectonexine permanent magnet dislocation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109256879A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742916A (en) * | 2019-02-21 | 2019-05-10 | 郑州大学 | A kind of permanent magnetism list stator and double-rotor disc type electric machine weakening cogging torque |
| WO2021109294A1 (en) * | 2019-12-05 | 2021-06-10 | 歌尔股份有限公司 | Permanent magnet synchronous electric motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017998A (en) * | 2007-03-12 | 2007-08-15 | 东南大学 | Directly driving mixed excitation dual stator wind power dynamotor |
| CN103475178A (en) * | 2013-09-30 | 2013-12-25 | 东南大学 | Linear rotation permanent magnet motor |
| CN104883016A (en) * | 2015-05-08 | 2015-09-02 | 江苏大学 | Double-stator magnetic field modulation permanent magnet motor |
| CN105305751A (en) * | 2015-11-24 | 2016-02-03 | 江苏大学 | Five-phase bearing-free brushless DC motor with two stators |
| CN105871140A (en) * | 2016-04-06 | 2016-08-17 | 哈尔滨理工大学 | Rotor dual-side permanent-magnet type single-winding dual-stator vernier motor |
| CN106981937A (en) * | 2017-03-10 | 2017-07-25 | 东南大学 | A kind of rotor misconstruction motor |
-
2018
- 2018-10-31 CN CN201811286682.1A patent/CN109256879A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017998A (en) * | 2007-03-12 | 2007-08-15 | 东南大学 | Directly driving mixed excitation dual stator wind power dynamotor |
| CN103475178A (en) * | 2013-09-30 | 2013-12-25 | 东南大学 | Linear rotation permanent magnet motor |
| CN104883016A (en) * | 2015-05-08 | 2015-09-02 | 江苏大学 | Double-stator magnetic field modulation permanent magnet motor |
| CN105305751A (en) * | 2015-11-24 | 2016-02-03 | 江苏大学 | Five-phase bearing-free brushless DC motor with two stators |
| CN105871140A (en) * | 2016-04-06 | 2016-08-17 | 哈尔滨理工大学 | Rotor dual-side permanent-magnet type single-winding dual-stator vernier motor |
| CN106981937A (en) * | 2017-03-10 | 2017-07-25 | 东南大学 | A kind of rotor misconstruction motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742916A (en) * | 2019-02-21 | 2019-05-10 | 郑州大学 | A kind of permanent magnetism list stator and double-rotor disc type electric machine weakening cogging torque |
| WO2021109294A1 (en) * | 2019-12-05 | 2021-06-10 | 歌尔股份有限公司 | Permanent magnet synchronous electric motor |
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Address after: 310013 No. 866 Tong Road, Xihu District, Zhejiang, Hangzhou, Yuhang Applicant after: ZHEJIANG University Applicant after: Shanghai Electric Wind Power Group Co., Ltd Address before: 310013 No. 866 Tong Road, Xihu District, Zhejiang, Hangzhou, Yuhang Applicant before: ZHEJIANG University Applicant before: SHANGHAI ELECTRIC WIND POWER GROUP Co.,Ltd. |
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