CN106763184A - A kind of sextupole radial-axial hybrid magnetic bearing - Google Patents
A kind of sextupole radial-axial hybrid magnetic bearing Download PDFInfo
- Publication number
- CN106763184A CN106763184A CN201710079782.6A CN201710079782A CN106763184A CN 106763184 A CN106763184 A CN 106763184A CN 201710079782 A CN201710079782 A CN 201710079782A CN 106763184 A CN106763184 A CN 106763184A
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- Prior art keywords
- axial
- radial
- stator
- poles
- magnet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
- F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/20—Application independent of particular apparatuses related to type of movement
- F16C2300/22—High-speed rotation
Abstract
The present invention disclose it is a kind of can be while control the sextupole radial-axial hybrid magnetic bearing of radial direction two-freedom and axial freedom, rotor coaxial sleeve radial stator outward is coaxially cased with the permanent magnet of annular outside radial stator, the external coaxial sleeve of permanent magnetism has axial stator；The evenly distributed in the circumferential direction of radial stator has six magnet radial poles, and radial direction control coil is wound in each magnet radial poles, and two radial direction control coils in aspectant two magnet radial poles are connected and winding direction is identical；Respectively equipped with an axial control coil for annular by axially two sides of radial stator, two axial control coils are connected and winding direction is identical；Radial stator of the invention uses sextupole structure, forms three-phase windings, reduces switching tube quantity, reduces power attenuation and driver cost, reduces the coupling between radially two frees degree.
Description
Technical field
The present invention relates to a kind of contactless magnetic suspension bearing（Abbreviation magnetic bearing）, particularly one kind can simultaneously control footpath
To two-freedom and the three freedom degree mixed magnetic bearing of axial freedom, it is adaptable to Aero-Space, nuclear energy, wind-power electricity generation, biology
The supporting of all kinds of rotating machineries in medical science, flywheel energy storage, high-speed electric main shaft and other industrial circles, belongs to high speed and superelevation
Fast Electrified Transmission field.
Background technology
Magnetic bearing utilizes electromagnetic force by rotor suspension in aerial, makes to be not in contact between rotor and stator, with without friction, nothing
Abrasion, without lubricating oil, can support that rotating speed is high, rotor displacement can dynamic regulation, rotating accuracy high, long lifespan the advantages of.Magnetic axis
Holding can be divided into Simple Freedom Magnetic Bearing according to the number of degrees of freedom, that can be controlled（Axial magnetic bearing）, two degrees of freedom magnetic bearing（Radially
Magnetic bearing）With Three Degree Of Freedom magnetic bearing（Radial-axial magnetic bearing）.The mode produced according to suspending power can be divided into active magnetic axis
Hold（Suspending power is produced by coil current）, passive magnetic bearing（Suspending power is produced by permanent magnet）And hybrid magnetic bearing（Suspending power by
Permanent magnet and coil current are produced jointly）.Wherein hybrid magnetic bearing provides biasing magnetic flux using permanent magnet, it is possible to reduce coil turn
Number, reduction power attenuation, reduction magnetic bearing volume and weight.Generally radially magnetic bearing all uses quadrupole or ends of the earth structure, and
Driven by two bipolarity close power amplifiers, in order to reduce switching tube quantity, switching power loss and drive circuit cost are reduced, using footpath
Driven to three-stage structure and by a three-phase inverter.Chinese Patent Application No. is disclosed in 200510040066.4 document
In " AC-DC radial-axial mixed magnetic bearing having three degrees of freedom and its control method ", radial and axial magnetic bearing is combined into one
Individual entirety, radial and axial biasing magnetic flux, and axially magnetic circuit and radially control are provided using a permanent magnet simultaneously
Without coupling between magnetic circuit, radially using three-stage structure, driven by a three-phase power inverter.But this magnetic bearing is present
Problem be：Its spatial dissymmetry of three-stage structure and three-phase inverter three-phase current and be zero condition, make radial suspension force
In pole orientation and the maximum suspending power of magnetic pole opposite direction, when magnetic bearing is designed suspending power minimum direction must meet
Requirement for bearing capacity, this necessarily causes the increase of magnetic bearing volume.In addition, three pole dissymmetrical structures increased magnetic bearing suspending power with
It is non-linear between electric current, displacement, also enhance the coupling between radially two frees degree.
The content of the invention
In order to overcome the weak point of the hybrid magnetic bearing of existing three-stage structure, the present invention to propose a kind of sextupole radial direction-axle
To hybrid magnetic bearing, to reduce magnetic bearing volume, space availability ratio is improved, reduce the non-linear of magnetic bearing, reduce radially two
Coupling between the free degree.
The technical solution adopted by the present invention is：The outer coaxial sleeve radial stator of rotor, is coaxially cased with annular outside radial stator
Permanent magnet, the external coaxial sleeve of permanent magnetism has axial stator；The evenly distributed in the circumferential direction of radial stator has six magnet radial poles,
Radial direction control coil is wound in each magnet radial poles, the two radial direction control coils series connection in aspectant two magnet radial poles
And winding direction is identical；Respectively equipped with an axial control coil for annular, two axial directions by axially two sides of radial stator
Control coil is connected and winding direction is identical.
Further, axial stator is made up of axial stator cylinder, two axial stator disks and two axial poles, axle
An axial stator disk is respectively fixedly connected to the two ends of stator tube, two axial stator dish structures are identical and symmetrical cloth Face to face
Put, the centre of axial stator disk is protruded to opposite direction and extends the axial pole of annular, two to the axial two ends of rotor
Axial air-gap is accordingly left between axial pole and the axial two ends of rotor.
Further, permanent magnet is fixed and is embedded between the inner ring surface of the outer ring surface of radial stator and axial stator cylinder,
Axial control coil is wrapped on the inner ring surface of axial stator cylinder.
Compared with existing hybrid magnetic bearing, the advantage of the invention is that：Radial stator of the invention uses sextupole structure, shape
Into three-phase windings, driven using three phase full bridge, reduce switching tube quantity, reduce power attenuation and driver cost.Radially six
Pole structure makes the suspending power/displacement of magnetic bearing and suspending power/current characteristics all tend to linear, and improves the carrying of magnetic bearing
Power, reduces the coupling radially between two frees degree, solves three polar diameters and is brought to-axial mixed magnetic bearing radial direction asymmetry
Non-linear and between two free degree suspending powers of radial direction coupled problem between radial suspension force and control electric current.The present invention is by permanent magnetism
Body produces suspending power jointly with coil, reduces system power dissipation.Present invention control is simpler, accurate.
Brief description of the drawings
Fig. 1 is a kind of radial cross-section of sextupole radial-axial hybrid magnetic bearing of the invention；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is the mounting structure sectional view of the axial stator in Fig. 2 and axial control coil；
Fig. 4 is the mounting structure figure of radial stator and radial direction control coil in Fig. 1；
Fig. 5 is axial magnetic circuit schematic diagram of the invention；
Fig. 6 is radial magnetic circuit schematic diagram of the invention；
In figure：1. rotor；2. axial stator；3. radial stator；4. radial direction control coil；5. axial control coil；6. permanent magnet；
21. axial stators cylinder；31. radial stator yokes；41st, 42,43,44,45,46. radial direction control coil；51st, 52. axial control line
Circle；71st, 72. axial air-gap；81. radial air gaps；91. biasing magnetic fluxs；92. axially control magnetic flux；93. radially control magnetic flux；
221st, 222. axial stator disk；231st, 232. axial pole；321st, 322,323,324,325,326. magnet radial poles.
Specific embodiment
As depicted in figs. 1 and 2, the present invention is by rotor 1, axial stator 2, radial stator 3, axially radial direction control coil 4, control
Coil processed 5 and permanent magnet 6 are constituted.Rotor 1 is located at the center of radial stator 3, in the outer coaxial sleeve radial stator 3 of rotor 1, radial direction
The outer permanent magnet 6 for being coaxially cased with annular of stator 3, permanent magnet 6 is outer to be coaxially cased with axial stator 2.The permanent magnet 6 of annular is along footpath
To magnetizing, the inner side of permanent magnet 6 is S poles, and outside is N poles.Permanent magnet 6 is embedded in the outer ring surface and axial stator 2 of radial stator 3
Between inner ring surface.The axial length of permanent magnet 6 is less than the axial length of radial stator 3, and the axial length of radial stator 3 is less than and turns
The axial length of son 1.
Radial stator 3 is combined as a whole and is constituted by radial stator yoke 31 and magnet radial poles 32, and radial stator yoke 31 is annulus
Shape, the inner ring surface of radial stator yoke 31 is evenly distributed in the circumferential direction six magnet radial poles 32, forms sextupole structure.Each is radially
Radial direction control coil 4 is all wound with magnetic pole 32.It is each by axially two sides of radial stator 3 that an axial control coil is installed
5, axial control coil 5 is in annular, vertically the inner ring surface winding of stator 2, and axial control coil 5 does not connect with radial stator 3
Touch, it is spaced apart in the axial direction.
Axial stator 2 is cylindrical, and radial stator 3, radial direction control coil 4, axial control coil 5 and permanent magnet 6 are all wrapped
It is contained in the central shaft of the inside of axial stator 2, axial stator 2 and rotor 1, radial stator 3, axial control coil 5 and permanent magnet 6
Collinearly.
Axial air-gap, the axial air-gap point at two ends are left between the axial two ends of axial stator 2 and the axial two ends of rotor 1
It is not axial air-gap 71 and axial air-gap 72.Six inner ring surfaces of magnet radial poles 32 of radial stator 3 and the outer ring surface of rotor 1 it
Between leave radial air gap 81.
Rotor 1 and radial stator 3 are formed by silicon steel plate stacking, and radial direction control coil 4 and axial control coil 5 are using mark
Claim the tape insulation paint copper cash of a diameter of 0.67mm, axial stator 2 uses ferro-silicium material.Permanent magnet 6 uses rare earth Ru-Fe-Mn
Permanent-magnet material, radially magnetizes, for producing biasing magnetic flux.
As shown in figure 3, columnar axial stator 2 is by an axial stator cylinder 21 and two axial stator disks and two
Axial pole is constituted.The two ends of axial stator cylinder 21 are respectively fixedly connected an axial stator disk, the two axial stator disks difference
It is axial stator disk 221 and axial stator disk 222, the structure of two axial stator disks 221,222 is identical and symmetrical Face to face
Arrangement.The external diameter of axial stator cylinder 21 is equal with the external diameter of two axial stator disks 221,222.
The centre of two axial stator disks 221,222 is respectively provided with an axial magnetic for the annular protruded to opposite direction
Pole, the two axial poles are respectively accordingly axial pole 231 and axial pole 232, axial pole 231 and axial pole
232 is each accordingly to the axial two ends extension of rotor 1, and accordingly leaves axial air-gap and the axial two ends of rotor 1 between
71st, axial air-gap 72.Axial stator cylinder 21 is enclosed within outside permanent magnet 6, is fixed with permanent magnet 6, i.e., permanent magnet 6 is fixed and is embedded in footpath
Between inner ring surface to outer ring surface and the axial stator cylinder 21 of stator 3.Two axial control coils 5 are wrapped in axial stator cylinder 21
Inner ring surface on, be respectively the axial control coil 52 by control coil 51 and axial another side axially by a side, axle
It is serially connected with axial control coil 52 to control coil 51 and winding direction is identical.Radial stator 3, radial direction control coil 4, axle
All it is contained in the cylinder that axial stator cylinder 21 and two axial stator disks 221,222 are surrounded to control coil 5 and permanent magnet 6
Portion.
As shown in figure 4, six magnet radial poles 32 of radial stator 3 be sequentially magnet radial poles 321,322,323,324,325,
326, a radial direction control coil 4 is respectively wound in six magnet radial poles 321,322,323,324,325,326, six radially control
Coil 4 is sequentially radial direction control coil 41,42,43,44,45,46.Two wherein practised physiognomy in two magnet radial poles 32 on opposite
Radial direction control coil is in series, and winding direction is identical, forms three-phase coil, and three-phase coil uses star-like connection, and uses three
Phase full-bridge circuit drives.
As shown in figure 5, during present invention work, permanent magnet 6 produces biasing magnetic flux 91, biasing magnetic flux 91 to be flowed out from permanent magnet 6
Into axial stator cylinder 21, two axial stator disks 221,222 are averagely diverted to axial two ends, then respectively through axial air-gap
71st, 72 enter rotor 1, are flowed out by entering magnet radial poles 32 after radial air gap 81, after again passing through radial stator yoke 31 from rotor 1
Permanent magnet 6 is returned to, so as to form the biasing magnetic flux 91 of closure.When being passed through forward current in two axial control coils 51,52,
The axial direction control magnetic flux 92 of generation flows into axial stator cylinder 21 from an axial stator disk 221, another from the flow direction of axial stator cylinder 21
One axial stator disk 222, then through axial air-gap 72 to rotor 1, finally returns to axial stator disk 221 through axial air-gap 71.
Because direction and axial direction control magnetic flux 92 are in opposite direction in axial air-gap 71 in biasing magnetic flux 91 axial air-gap 71 at one end,
Therefore, biasing magnetic flux 91 and axially counteracting in control magnetic flux 92 axial air-gap 71 at one end, and in the axial air-gap of the other end
Strengthen in 72, so as to produce the axial suspension power to the other end.It is negative value when electric current is passed through in two axial control coils 51,52
When, magnetic flux 91 is biased in the axial air-gap 71 of one end and is superimposed with axially control magnetic flux 92, it is inclined in the axial air-gap 72 of the other end
Put magnetic flux 92 to be offset with axially control magnetic flux 92, so as to produce the axial suspension power to axial one end.Therefore, by controlling two
The size of electric current and the positive and negative size and Orientation with regard to axial suspending power can be controlled in axial control coil 51,52.
As shown in fig. 6, the biasing magnetic flux 91 that permanent magnet 6 is produced enters magnet radial poles from rotor 1 by radial air gap 81
321、322、323、324、325、326.When radial direction control coil 41 and magnet radial poles 44 are passed through positive current, magnet radial poles 321
It is identical with biasing magnetic flux 91 direction with the radial direction control direction of magnetic flux 93 that this side of radial direction control coil 41 produces, bias magnetic flux 91
It is superimposed with radial direction control magnetic flux 93, and the radial direction control that the magnet radial poles 324 of right opposite and this side of radial direction control coil 44 produce
The direction of magnetic flux processed 93 and biasing magnetic flux 91 are in opposite direction, and biasing magnetic flux 91 is offset with radially control magnetic flux 93, so as to produce along footpath
To the radial suspension force of magnetic pole 321, result when radial direction control coil 41 and radial direction control coil 44 are passed through negative current with work as
Conversely, producing to anti-radial suspension force when radial direction control coil 41 and magnet radial poles 44 are passed through positive current.Similarly, controlled in radial direction
Electric current is passed through in coil processed 42 and radial direction control coil 45 can produce the footpath in radially magnetic pole 322 or the direction of magnet radial poles 325
To suspending power, be passed through in radial direction control coil 43 and radial direction control coil 46 electric current can produce radially magnetic pole 323 or
The radial suspension force in the direction of magnet radial poles 326.Therefore, by controlling the electricity in radial direction control coil 41,42,43,44,45,46
Stream can just produce all directions radial suspension force of different sizes.
Claims (5)
1. a kind of sextupole radial-axial hybrid magnetic bearing, rotor（1）Outer coaxial sleeve radial stator（3）, it is characterized in that：It is radially fixed
Son（3）The outer permanent magnet for being coaxially cased with annular（6）, permanent magnet（6）Coaxially it is cased with axial stator outward（2）；Radial stator（3）'s
It is evenly distributed in the circumferential direction to have six magnet radial poles（32）, each magnet radial poles（32）On all wind radial direction control coil（4）,
Aspectant two magnet radial poles（32）On two radial direction control coils（4）Connect and winding direction is identical；Radial stator（3）
Axially by two sides respectively equipped with an axial control coil for annular（5）, two axial control coils（5）Series connection and winding
Direction is identical.
2. a kind of sextupole radial-axial hybrid magnetic bearing according to claim 1, it is characterized in that：Axial stator（2）By one
Axial stator cylinder（21）, two axial stator disks and two axial poles constitute, axial stator cylinder（21）Two ends it is each it is fixed even
Connect an axial stator disk, two axial stator dish structures are identical and are arranged symmetrically Face to face, the centre of axial stator disk to
Opposite direction is protruded and to rotor（1）Axial two ends extend the axial pole of annular, two axial poles and rotor（1）'s
Axial air-gap is accordingly left between axial two ends.
3. a kind of sextupole radial-axial hybrid magnetic bearing according to claim 2, it is characterized in that：Permanent magnet（6）Fixation is inlayed
In radial stator（3）Outer ring surface and axial stator cylinder（21）Inner ring surface between, axial control coil（5）It is axially fixed to be wrapped in
Auxiliary cylinder（21）Inner ring surface on.
4. a kind of sextupole radial-axial hybrid magnetic bearing according to claim 1, it is characterized in that：Permanent magnet（6）Radially fill
Magnetic, inner side is S poles, and outside is N poles.
5. a kind of sextupole radial-axial hybrid magnetic bearing according to claim 1, it is characterized in that：Permanent magnet（6）Axial direction it is long
Degree is less than radial stator（3）Axial length, radial stator（3）Axial length be less than rotor（1）Axial length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079782.6A CN106763184B (en) | 2017-02-15 | 2017-02-15 | A kind of sextupole radial-axial hybrid magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079782.6A CN106763184B (en) | 2017-02-15 | 2017-02-15 | A kind of sextupole radial-axial hybrid magnetic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106763184A true CN106763184A (en) | 2017-05-31 |
| CN106763184B CN106763184B (en) | 2019-06-28 |
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| CN201710079782.6A Active CN106763184B (en) | 2017-02-15 | 2017-02-15 | A kind of sextupole radial-axial hybrid magnetic bearing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050156A (en) * | 2017-11-14 | 2018-05-18 | 江苏大学 | A kind of sextupole hybrid magnetic bearing |
| CN108599501A (en) * | 2018-06-30 | 2018-09-28 | 淮阴工学院 | A kind of axial direction single-degree-of-freedom induction-type bearingless motor |
| CN108895085A (en) * | 2018-08-31 | 2018-11-27 | 江苏大学 | A kind of inverter-driven outer roller axial-radial direction sextupole hybrid magnetic bearing |
| CN109268391A (en) * | 2018-11-26 | 2019-01-25 | 北京航空航天大学 | A kind of magnetic suspension stabilized platform multi-coil axial magnetic bearing |
| CN109474090A (en) * | 2018-11-15 | 2019-03-15 | 南京工业大学 | Doubly salient permanent magnet motor |
| CN112160985A (en) * | 2020-08-17 | 2021-01-01 | 江苏大学 | Electric spindle system supported by double-piece radial six-pole hybrid magnetic bearing with different magnetic pole surfaces |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050156A (en) * | 2017-11-14 | 2018-05-18 | 江苏大学 | A kind of sextupole hybrid magnetic bearing |
| CN108599501A (en) * | 2018-06-30 | 2018-09-28 | 淮阴工学院 | A kind of axial direction single-degree-of-freedom induction-type bearingless motor |
| CN108895085A (en) * | 2018-08-31 | 2018-11-27 | 江苏大学 | A kind of inverter-driven outer roller axial-radial direction sextupole hybrid magnetic bearing |
| CN108895085B (en) * | 2018-08-31 | 2023-08-22 | 江苏大学 | Inverter driving type outer rotor axial-radial six-pole hybrid magnetic bearing |
| CN109474090A (en) * | 2018-11-15 | 2019-03-15 | 南京工业大学 | Doubly salient permanent magnet motor |
| CN109268391A (en) * | 2018-11-26 | 2019-01-25 | 北京航空航天大学 | A kind of magnetic suspension stabilized platform multi-coil axial magnetic bearing |
| CN112160985A (en) * | 2020-08-17 | 2021-01-01 | 江苏大学 | Electric spindle system supported by double-piece radial six-pole hybrid magnetic bearing with different magnetic pole surfaces |
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| CN106763184B (en) | 2019-06-28 |
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Effective date of registration: 20211214 Address after: 212200 GANGLONG road science and technology innovation center, Yangzhong Development Zone, Zhenjiang City, Jiangsu Province Patentee after: Yangzhong Guanjie Technology Innovation Co.,Ltd. Address before: 212200 No. 239 Chunliu North Road, Sanmao street, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee before: Zhenjiang Top Management Consulting Co.,Ltd. Effective date of registration: 20211214 Address after: 212200 No. 239 Chunliu North Road, Sanmao street, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee after: Zhenjiang Top Management Consulting Co.,Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: JIANGSU University |
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