CN108718146A - A kind of A shapes modular stator bearing-free external rotor electric machine - Google Patents
A kind of A shapes modular stator bearing-free external rotor electric machine Download PDFInfo
- Publication number
- CN108718146A CN108718146A CN201810460455.XA CN201810460455A CN108718146A CN 108718146 A CN108718146 A CN 108718146A CN 201810460455 A CN201810460455 A CN 201810460455A CN 108718146 A CN108718146 A CN 108718146A
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- suspension
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- core
- stator
- magnet body
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention discloses a kind of A shapes modular stator bearing-free external rotor electric machine, there are one suspension cruciform cores for concentric set inside outer rotor, suspension cruciform core has the suspension permanent magnet body four identical pieces of for connecting into decussate texture, it is fixed in every silicon steel sheet magnetic conduction item to be embedded with one piece of suspension permanent magnet body, it is wound with suspending windings at the outer end of every silicon steel sheet magnetic conduction item, space inside outer rotor is divided into four 90 ° of sector by suspension cruciform core, it is designed with three identical A shapes modular stators in each sector, two identical 10 ° every magnetic card block 8 and two it is identical 5 ° every magnetic card block, there are one 10 ° every magnetic card block for geometrical clamp between two adjacent A shape modular stators, there are one 5 ° every magnetic card block for geometrical clamp between suspension cruciform core and hithermost A shape modular stators；The magnetic circuit between rotor is shortened, motor output torque is increased, torque winding is detached with suspending windings position, reduces the magnetic coupling that winding generates.
Description
Technical field
The present invention relates to bearing-free motor structure, specifically a kind of composite excitation bearing-free outer rotor motor structure.
Background technology
Existing bearing-free motor mostly uses greatly inner rotor core, and external rotor electric machine is mechanical bearing mostly.Mechanical bearing
There are complicated, repair is inconvenient, bearing and rotor contact wear are violent, will produce a large amount of friction normal works of heat affecting motor
The problems such as making.There is a small amount of bearing-free magnetic resistance external rotor electric machine, be only applicable in a kind of excitation mode, and asks there are magnetic circuit is long etc.
Topic prevents motor output torque from meeting such as flying wheel battery the operating condition that some need big torque.
Invention content
It is small that there are output torques the invention aims to solving the problems, such as current bearing-free external rotor electric machine, it is proposed that one
The A shape modular stator composite excitation bearing-free external rotor electric machines of the larger output torque of kind.
A kind of A shapes modular stator bearing-free external rotor electric machine of the present invention the technical solution adopted is that：It is same inside outer rotor
There are one suspension cruciform core, suspension cruciform cores to have the suspension permanent magnet four identical pieces of for connecting into decussate texture for axes sleeve
Body, it is fixed in every silicon steel sheet magnetic conduction item to be embedded with one piece of suspension permanent magnet body, it is wound at the outer end of every silicon steel sheet magnetic conduction item outstanding
Floating winding；Space inside outer rotor is divided into four 90 ° of sector by suspension cruciform core, and three are designed in each sector
Identical A shapes modular stator, two identical 10 ° every magnetic card block 8 and two it is identical 5 ° every magnetic card block, adjacent two A
For geometrical clamp there are one 10 ° every magnetic card block, suspension cruciform core and hithermost A shape modularizations are fixed between shape modular stator
There are one 5 ° every magnetic card block for geometrical clamp between son.
All equal radial magnetizings of suspension permanent magnet body, the magnetizing direction of two neighboring suspension permanent magnet body are opposite.
Each A shapes modular stator is made of fan-shaped stator aluminium core, stator core and torque moment permanent-magnet body, stator aluminium core
Outer end is fixedly connected with stator core, and torque moment permanent-magnet body is fixed on stator core, and torque winding is wound on stator core.
Stator core is the sector structure for being radially provided with U-type groove in middle, and the opening of U-type groove is outwardly and U-type groove
Two side between fixation inlay torque moment permanent-magnet body.
Torque winding is wound on the two side of U-type groove, the direction of winding of the torque winding in the same U-type groove on the contrary,
Torque winding is located at the outside of torque moment permanent-magnet body.
The equal cutting orientation magnetizing of each torque moment permanent-magnet body, the magnetizing direction of all torque moment permanent-magnet bodies are identical.
The present invention this have the advantage that after using above-mentioned technical proposal：
1, using A shape modular stators, using stator aluminium core structure, can shorten while mitigating motor weight between rotor
Magnetic circuit, increase motor output torque while reducing the loss of electric machine.
2, it is added to torque moment permanent-magnet body in A shape modular stators, increases permanent magnetic circuit identical with winding loop, increased
Big motor output torque.
3, compared to traditional bearing-free motor, the present invention inlays the structure of suspension permanent magnet body using suspension cruciform core, will
Torque winding detaches as possible with suspending windings position, reduces the magnetic coupling that winding generates, and is influenced on torque smaller.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of A shapes modular stator bearing-free external rotor electric machine of the present invention；
Fig. 2 is the structure chart of suspension cruciform core in Fig. 1；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the schematic enlarged-scale view of single A shape modular stators in Fig. 1；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is that motor of the present invention generates torque schematic diagram when working；
Fig. 7 is that motor of the present invention generates suspending power schematic diagram when working；
In figure：1. outer rotor；2. torque moment permanent-magnet body；3. stator core；4. torque winding；5. suspension permanent magnet body；6. suspending windings；
7. stator aluminium core；8. 10 ° every magnetic card block；9. 5 ° every magnetic card block；10. suspension cruciform core.
Specific implementation mode
As shown in Figure 1, most external of the present invention is an outer rotor 1, outer rotor 1 is made of silicon steel sheet, has 28 rotors
Tooth.For the 1 concentric set in inside of outer rotor there are one in criss-cross suspension cruciform core 10, suspension cruciform core 10 is located at bosom
Position, there are radial air gaps between the rotor tooth and suspension cruciform core 10 of outer rotor 1, and the size of radial air gap is 0.5mm.
In conjunction with shown in Fig. 2,3, suspension cruciform core 10 is by suspension permanent magnet body 5 four identical pieces of and four identical silicon steel sheets
Magnetic conduction item forms, and four identical silicon steel sheet magnetic conduction items connect into decussate texture, fix and are embedded in every silicon steel sheet magnetic conduction item
One piece of suspension permanent magnet body 5.The center O of suspension cruciform core 10 is the center of the present invention, the outer end face of every silicon steel sheet magnetic conduction item
It is the arc surface using center O as the center of circle, with radius for R, is radial air gap between the arc surface and outer rotor 1 of outer end.
The axial width of suspension cruciform core 10 is B, and the length that every silicon steel sheet magnetic conduction item stretches out radially is H, i.e.,
The inner face of every silicon steel sheet magnetic conduction item to radical length between outer end face is H.Apart from every silicon steel sheet magnetic conduction inner end
It is embedded with one piece of suspension permanent magnet body 5 at 2/5H, the tangential width of suspension permanent magnet body 5 and axial width are tangential with silicon steel sheet magnetic conduction item
Width is equal with axial width difference, when suspension permanent magnet body 5 is embedded in silicon steel sheet magnetic conduction item with silicon steel sheet magnetic conduction flush.
5 equal radial magnetizing of suspension permanent magnet body, the magnetizing direction of two neighboring suspension permanent magnet body 5 are opposite.In the outside of suspension permanent magnet body 5,
Every silicon steel sheet magnetic conduction item is all being wound with suspending windings 6 at outer end.
Space inside outer rotor 1 is divided into four 90 ° of sector by suspension cruciform core 10, is all set in each sector
There are three the identical A shapes modular stator of shapes and sizes, two identical 10 ° identical 5 ° every magnetic card block 8 and two
Every magnetic card block 9.A shapes modular stator in the same sector and 10 ° are every 8 center having the same of magnetic card block.Each A shape modules
Change stator and occupy 20 ° of fan sections, geometrical clamp suspends there are one 10 ° every magnetic card block 8 between adjacent two A shape modular stators
There are one 5 ° every magnetic card block 9 for geometrical clamp between cruciform core 10 and hithermost A shape modular stators.That is three A shape moulds
Block stator, two 10 ° collectively constitute 90 ° of sectors every magnetic card block 8 and two 5 ° every magnetic card block 9.Each A shape modularizations are fixed
The outer diameter of son is equal to the outer diameter of suspension cruciform core 10.The axial width and suspension cruciform core 10 of each A shape modular stators
Axial width it is identical, be B.
As shown in Fig. 1,4,5, each A shapes modular stator is by a stator aluminium core 7, stator core 3 and torque moment permanent-magnet
Body 2 forms.Torque winding 4 is wound on stator core 3.Stator aluminium core 7 is the sector that an angle is 20 °, radius is 2/3H
Aluminium block structure, outer end are fixedly connected with stator core 3, and torque moment permanent-magnet body 2 is fixed on stator core 3.Outside stator core 3
Diameter is equal to the outer diameter of suspension cruciform core 10, is radial air gap between the outer end face and outer rotor 1 of stator core 3.Stator core 3
It is the sector structure for being radially provided with U-type groove in middle, fan angle is 20 °.The opening of U-type groove outwardly, the bottom of U-type groove
The outer end of portion and stator aluminium core 7 is seamless to be fixedly joined together, and the bottom radical length of U-type groove is b, the two side of U-type groove
Tangential width is equal to bottom radical length and b.One piece of torque moment permanent-magnet body 2 is inlayed in fixation between the two side of U-type groove, is turned
Torque permanent magnet body 2 is also sector, and fan angle is also 20 °.The axial width of torque moment permanent-magnet body 2 is equal to the axial thick of stator core 3
Degree.The outer diameter of torque moment permanent-magnet body 2 is less than the outer diameter of stator core 3, and the internal diameter of torque moment permanent-magnet body 2 is more than the U-type groove of stator core 3
Bottom outer diameter.Each 2 equal cutting orientation magnetizing of torque moment permanent-magnet body, the magnetizing direction of all torque moment permanent-magnet bodies 2 are identical.
Stator aluminium core 7 is with stator core 3 by being welded to connect.It is wound with and turns on the two side of the U-type groove of stator core 3
Square winding 4, and the direction of winding of the torque winding 4 in the same U-type groove is opposite.Torque winding 4 is located at the outer of torque moment permanent-magnet body 2
Side, the internal diameter of torque moment permanent-magnet body 2 are more than the outer diameter positioned at suspending windings 6.
10 ° of outer diameters every magnetic card block 8 are more than the internal diameter of stator core 3 but the internal diameter less than torque moment permanent-magnet body 2.10 ° every magnetic
Fixture block 8 is identical as 5 ° of outer diameters every magnetic card block 9.
As shown in fig. 6, the operation principle of the present invention, by taking one of A shapes modular stator as an example, torque winding 4 is powered,
It is formed in stator core 3 and a magnetic field clockwise in outer rotor 1, i.e. torque winding magnetic field 12, torque winding magnetic field 12
Path is sequentially to return to stator core 3 after stator core 3, outer rotor 1.It is identical as switched reluctance machines principle, according to minimum
Reluctance principle can generate reluctance torque after the torque winding 4 in each A shapes modular stator is powered successively.Simultaneously as
The presence of torque moment permanent-magnet body 2 can form a magnetic field clockwise in torque moment permanent-magnet body 2, stator core 3 and outer rotor 1, that is, turn
Torque permanent magnet body magnetic field 11, torque moment permanent-magnet body magnetic field 11 enter outer rotor 1 by torque moment permanent-magnet body 2 after stator core 3, and it is fixed to return
Enter torque moment permanent-magnet body 2 after sub- iron core 3,11 direction of torque moment permanent-magnet body magnetic field is identical as 12 direction of torque winding magnetic field, such energy
Increase the total torque of motor.
As shown in fig. 7, X1 axis, X2 axis are by the trunnion axis of 10 center O of suspension cruciform core, and the side of X1 axis and X2 axis
To on the contrary, Y1 axis, Y2 axis are by the vertical axis of 10 center O of suspension cruciform core, and the direction of Y1 axis, Y2 axis is opposite.Motor
When suspension, when 6 no power of suspending windings, due to the presence of suspension permanent magnet body 5, in suspension cruciform core 10 and outer rotor 1
It will produce suspension permanent magnet body magnetic field 14, tetra- tunnels 14 Fen Wei of suspension permanent magnet body magnetic field：The first via is from the suspension permanent magnet on the directions X1
Body 5 enters outer rotor 1, then enters the suspension permanent magnet body 5 on the directions Y1 after outer rotor 1, eventually passes back to the suspension on the directions X1
Permanent magnet 5；Second tunnel is to enter outer rotor 1 from the suspension permanent magnet body 5 on the directions X1, then enter on the directions Y2 after outer rotor 1
Suspension permanent magnet body 5 in, eventually pass back in the suspension permanent magnet body 5 on the directions X1；Third road is from the suspension permanent magnet on the directions X2
Body 5 enters outer rotor 1, then enters in the suspension permanent magnet body 5 on the directions Y1 after outer rotor 1, eventually passes back to outstanding on the directions X2
In floating permanent magnet 5；4th tunnel is to enter outer rotor 1 from the suspension permanent magnet body 5 on the directions X2, and the directions Y2 are entered after outer rotor 1
On suspension permanent magnet body 5, eventually pass back to the suspension permanent magnet body 5 on the directions X2.When the suspending windings 6 on the directions Y1 and Y2 are powered
Afterwards, suspending windings magnetic field 13 is generated in suspension cruciform core 10.In magnetic conduction item on the directions Y1,13 direction of suspending windings magnetic field
Towards the directions Y2, in the magnetic conduction item on the directions Y2,13 direction of suspending windings magnetic field is towards the directions Y2, in this way, on the directions Y1
Suspending windings magnetic field 13 and suspension permanent magnet body magnetic field 14 it is superimposed, the suspending windings magnetic field 13 on the directions Y2 and suspension permanent magnet
Body magnetic field 14 is subtracted each other, therefore the magnetic field intensity on the directions Y1 is more than the magnetic field intensity on the directions Y2, according to Maxwell's principle,
It will produce the suspending power Fy on the directions Y1.Meanwhile the suspending windings magnetic field 13 on the direction Y1, Y2 and suspension permanent magnet body magnetic field
The 14 upper influence in the direction X1, X2 is identical, therefore not will produce the suspending power on the direction X1, X2.
Claims (10)
1. a kind of A shapes modular stator bearing-free external rotor electric machine has outer rotor（1）, it is characterized in that：Outer rotor（1）It is internal
There are one suspension cruciform cores for concentric set（10）, suspension cruciform core（10）It is identical with connect into decussate texture four pieces
Suspension permanent magnet body 5, it is fixed in every silicon steel sheet magnetic conduction item to be embedded with one piece of suspension permanent magnet body（5）, every silicon steel sheet magnetic conduction item
Suspending windings are wound at outer end（6）；Suspension cruciform core（10）By outer rotor（1）Internal space is divided into four 90 °
Sector, be designed in each sector three identical A shapes modular stators, two identical 10 ° it is identical every magnetic card block 8 and two
5 ° every magnetic card block（9）, there are one 10 ° every magnetic card block for geometrical clamp between two adjacent A shape modular stators（8）, suspension ten
Word iron core（10 Hes）There are one 5 ° every magnetic card block for geometrical clamp between hithermost A shape modular stators（9）.
2. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 1, it is characterized in that：All is outstanding
Floating permanent magnet（5）Equal radial magnetizing, two neighboring suspension permanent magnet body（5）Magnetizing direction it is opposite.
3. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 1, it is characterized in that：Each A shape moulds
Block stator is all by fan-shaped stator aluminium core（7）, stator core（3）With torque moment permanent-magnet body（2）Composition, stator aluminium core（7）Outer end
It is fixedly connected with stator core（3）, torque moment permanent-magnet body（2）It is fixed to be embedded in stator core（3）On, stator core（3）On be wound with torque
Winding（4）.
4. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 3, it is characterized in that：Stator core
（3）It is the sector structure for being radially provided with U-type groove in middle, the opening of U-type groove is outwardly and solid between the two side of U-type groove
Surely torque moment permanent-magnet body is inlayed（2）.
5. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 4, it is characterized in that：The two of U-type groove
Torque winding is wound on side wall（4）, the torque winding in the same U-type groove（4）Direction of winding on the contrary, torque winding（4）
Positioned at torque moment permanent-magnet body（2）Outside.
6. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 3, it is characterized in that：Each torque
Permanent magnet（2）Equal cutting orientation magnetizing, all torque moment permanent-magnet bodies（2）Magnetizing direction it is identical.
7. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 3, it is characterized in that：Stator core
（3）Outer diameter be equal to suspension cruciform core（10）Outer diameter, 10 ° of outer diameters every magnetic card block 8 be more than stator core（3）Internal diameter but
Less than torque moment permanent-magnet body（2）Internal diameter.
8. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 3, it is characterized in that：Torque moment permanent-magnet
Body（2）Axial width be equal to stator core（3）Axial width.
9. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 3, it is characterized in that：Torque moment permanent-magnet
Body（2）Outer diameter be less than stator core（3）Outer diameter, internal diameter be more than stator core（3）U-type groove bottom outer diameter.
10. a kind of A shapes modular stator bearing-free external rotor electric machine according to claim 1, it is characterized in that：The same fan
A shapes modular stator in area and 10 ° are every magnetic card block（8）Center having the same, the axial width of each A shapes modular stator
With suspension cruciform core（10）Axial width it is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810460455.XA CN108718146B (en) | 2018-05-15 | 2018-05-15 | A-shaped modular stator bearingless outer rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810460455.XA CN108718146B (en) | 2018-05-15 | 2018-05-15 | A-shaped modular stator bearingless outer rotor motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108718146A true CN108718146A (en) | 2018-10-30 |
| CN108718146B CN108718146B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810460455.XA Active CN108718146B (en) | 2018-05-15 | 2018-05-15 | A-shaped modular stator bearingless outer rotor motor |
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| Country | Link |
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| CN (1) | CN108718146B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI689155B (en) * | 2018-12-17 | 2020-03-21 | 建準電機工業股份有限公司 | Outer-rotor motor |
| CN113410927A (en) * | 2021-05-24 | 2021-09-17 | 东南大学 | Modularized motor with interphase magnetic isolation capability |
| WO2022057885A1 (en) * | 2020-09-21 | 2022-03-24 | 广州源动智慧体育科技有限公司 | Strength equipment loading motor and strength equipment |
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| JP2008295206A (en) * | 2007-05-24 | 2008-12-04 | Tokyo Univ Of Science | Bearingless motor and bearingless motor control system |
| CN101922511A (en) * | 2010-08-25 | 2010-12-22 | 江苏大学 | Permanent-magnet bias outer rotor radial AC hybrid magnetic bearing |
| CN106385203A (en) * | 2016-09-30 | 2017-02-08 | 南京工程学院 | Axial split-phase internal stator permanent magnet biased magnetic suspension switched reluctance flywheel motor |
| CN107769622A (en) * | 2017-11-30 | 2018-03-06 | 北京理工大学 | A kind of axial magnetic formula motor |
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2018
- 2018-05-15 CN CN201810460455.XA patent/CN108718146B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008295206A (en) * | 2007-05-24 | 2008-12-04 | Tokyo Univ Of Science | Bearingless motor and bearingless motor control system |
| CN101922511A (en) * | 2010-08-25 | 2010-12-22 | 江苏大学 | Permanent-magnet bias outer rotor radial AC hybrid magnetic bearing |
| CN106385203A (en) * | 2016-09-30 | 2017-02-08 | 南京工程学院 | Axial split-phase internal stator permanent magnet biased magnetic suspension switched reluctance flywheel motor |
| CN107769622A (en) * | 2017-11-30 | 2018-03-06 | 北京理工大学 | A kind of axial magnetic formula motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI689155B (en) * | 2018-12-17 | 2020-03-21 | 建準電機工業股份有限公司 | Outer-rotor motor |
| WO2022057885A1 (en) * | 2020-09-21 | 2022-03-24 | 广州源动智慧体育科技有限公司 | Strength equipment loading motor and strength equipment |
| CN113410927A (en) * | 2021-05-24 | 2021-09-17 | 东南大学 | Modularized motor with interphase magnetic isolation capability |
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| Publication number | Publication date |
|---|---|
| CN108718146B (en) | 2020-03-31 |
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