CN102537048A - Axial magnetic bearing capable of controlling radial twisting - Google Patents
Axial magnetic bearing capable of controlling radial twisting Download PDFInfo
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- CN102537048A CN102537048A CN201210027614XA CN201210027614A CN102537048A CN 102537048 A CN102537048 A CN 102537048A CN 201210027614X A CN201210027614X A CN 201210027614XA CN 201210027614 A CN201210027614 A CN 201210027614A CN 102537048 A CN102537048 A CN 102537048A
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- stator iron
- iron core
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- core magnetic
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Abstract
The invention relates to an axial magnetic bearing capable of controlling radial torsion, which comprises a stator assembly and a rotor, wherein the stator assembly consists of two groups of stator iron cores, a permanent magnet and coils, the two groups of stator iron cores are provided with four magnetic poles which are arranged along an inner ring and an outer ring, the gravity-center connecting line of one pair of inner-ring stator iron-core magnetic poles is vertical to that of the other pair of outer-ring stator iron-core magnetic poles, and the coil is wound on each stator iron-core magnetic pole. An axial magnetic air gap is formed between the stator assembly and the rotor, the radial inner side of the permanent magnet is connected with the inner-ring stator iron cores, and the radial outer side of the permanent magnet is connected with the outer-ring stator iron cores. The radial twisting control of a magnetic-suspended rotor can be realized through the two groups of stator iron cores according to the invention, and the axial size of a system can be greatly decreased. The axial magnetic bearing also has the advantages that the rotation loss is low, the performance is reliable, the control is facilitated, and the like.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, the axial magnetic bearing that particularly a kind of may command is radially reversed can be used as the contactless support of all strict Magnetic levitation apparatus of volume and power consumption.
Background technique
Magnetic suspension bearing commonly used divides electromagnetism offset and permanent magnet bias to power up the hybrid magnetic suspension bearing of magnetic control system; The former adopts electric current to produce bias magnetic field, so operating current is big, power consumption is big, and The latter permanent magnet place of current produces bias magnetic field; Main bearing capacity is born in the magnetic field that permanent magnet produces; Electromagnetism magnetic field provides auxiliary adjusting bearing capacity, thereby this bearing can reduce to control electric current greatly, reduces the wastage.The axial magnetic bearing stator structure of existing most structures all is a completely circular structure; Can only carry out axial translation control to rotor; Can't radially twist control to rotor, thereby in requiring entire system axial length smaller applications occasion, be difficult to be applied particularly existing fly wheel system; Usually make the outer-rotor structure form to reduce overall volume; Utilize the radial direction magnetic bearing control of using in pairs to reverse, so between the radial direction magnetic bearing that uses in pairs certain span must be arranged, this has just brought the increase of axial length.And existing Three Degree Of Freedom axial magnetic bearing, because it along the circumferential direction is divided into 4 magnetic poles along interior ring iron core and outer shroud iron core, so magnetic field needs alternation 4 times when rotor rotates a circle, power consumption is still very important when high speed rotating.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiency of existing technology, the axial magnetic bearing that a kind of rotational loss is low, can radially twist control is provided.
Technical solution of the present invention is:
The axial magnetic bearing that a kind of may command is radially reversed; The stator module that comprises rotor and be arranged on the rotor top; Stator module comprises permanent magnet and four stator iron core magnetic poles; These four stator iron core magnetic poles circumferentially are distributed on the permanent magnet periphery; And ring stator iron core magnetic pole links to each other with the radially inner side of permanent magnet in a couple who wherein is oppositely arranged, and remaining another links to each other with the radial outside of permanent magnet to outer shroud stator iron core magnetic pole, and the center of gravity line and another the center of gravity line to outer shroud stator iron core magnetic pole that encircle the stator iron core magnetic pole in one pair are perpendicular; Be wound with coil on each stator iron core magnetic pole, form the axial magnetic air gap between interior ring stator iron core magnetic pole and outer shroud stator iron core magnetic pole and the rotor.
Described permanent magnet adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to process, and is radial magnetizing.
Ring stator iron core magnetic pole and outer shroud stator iron core magnetic pole adopt the good material of magnetic property to be overrided to form in described, and the axial magnetic air gap that forms between the rotor is 0.2-0.4mm.
Described rotor is the thrust disc that the good material of magnetic property is processed, the part of system's rotating part of perhaps processing for the good material of magnetic property.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bears the suffered axial force of magnetic bearing, and regulating action is played in the magnetic field that field coil produces, and keeps magnetic bearing rotor air gap even, and makes rotor obtain contactless support.Permanent magnetic circuit of the present invention constitutes the closed-loop path through permanent magnet, interior ring stator iron core magnetic pole, outer shroud stator iron core magnetic pole, magnetic air gap and rotor, forms the main magnetic circuit of magnetic suspension bearing; (the permanent magnet magnetic resistance is big because permanent magnet " separates interior ring stator iron core magnetic pole and outer shroud stator iron core magnetic pole "; To electromagnetic circuit is a very big magnetic resistance); Therefore the electromagnetic circuit that produces during the coil electricity of ring stator iron core magnetic pole coiling in only forms electromagnetic circuit between the ring stator iron core magnetic pole in two; In like manner, the electromagnetic circuit that produces during the coil electricity of outer shroud stator iron core magnetic pole coiling only forms electromagnetic circuit between two outer shroud stator iron core magnetic poles.Guaranteed that like this electromagnetic circuit is not inner through permanent magnet, reduced the magnetic resistance of electromagnetic circuit, reduced exciting curent, reduced the power consumption of bearing.Axial magnetic bearing of the present invention uses in pairs; The stator iron core magnetic pole that guarantees two axial magnetic bearings up and down during installation over against; The interior ring stator iron core magnetic pole that promptly guarantees two axial magnetic bearings simultaneously is edge+X and-directions X placement simultaneously; And outer shroud stator iron core magnetic pole simultaneously edge+Y is placed with-Y direction, perhaps the interior ring stator iron core magnetic pole of two axial magnetic bearings simultaneously edge+Y place with-Y direction, and outer shroud stator iron core magnetic pole simultaneously edge+X and-the directions X placement.The permanent magnet flow direction that the air gap place produces between interior ring stator iron core magnetic pole and rotor is identical; And the flow direction that the air gap place of the coil electricity on the interior ring stator iron core magnetic pole between two stator iron core magnetic poles of interior ring and rotor produces is opposite; Therefore when rotor takes place radially to reverse; Can realize that through the regulating winding electric current air gap place and permanent magnet flux that the electromagnetism magnetic flux encircles between magnetic pole of the stator and the rotor are superimposed in one; And in another between ring magnetic pole of the stator and rotor the air gap place offset with permanent magnet flux, so the flywheel moment that can produce radial direction makes rotor return to the equilibrium position.In like manner; The permanent magnet flow direction that the air gap place produces between outer shroud stator iron core magnetic pole and rotor is identical; And the flow direction that the air gap place of the coil electricity on the outer shroud stator iron core magnetic pole between two stator iron core magnetic poles of outer shroud and rotor produces is opposite; Therefore when rotor takes place radially to reverse; Can realize that through the regulating winding electric current air gap place and the permanent magnet flux of electromagnetism magnetic flux between an outer shroud magnetic pole of the stator and rotor is superimposed, and air gap place and permanent magnet flux offset between another outer shroud magnetic pole of the stator and rotor, the flywheel moment that therefore can produce radial direction makes rotor return to the equilibrium position.
The present invention's advantage compared with prior art is: the present invention is owing to adopt permanent magnetic field as bias magnetic field; Compare with the traditional electrical magnetic bearing and to have eliminated the bias current that in coil current, accounts for fundamental component; Reduced winding copper loss and the loss of control power amplifier, therefore low in energy consumption.Compare with existing permanent-magnetic biased axial magnetic bearing; The stator module of permanent-magnetic biased axial magnetic bearing of the present invention has adopted the form of interior ring stator iron core and outer shroud stator iron core; And the inner and outer rings stator iron core all has 2 magnetic poles; Thereby can realize the radially twisting control of rotor, and make that the magnetic field in the air gap had only alternation twice when rotor rotated a circle, reduced the defective of existing Three Degree Of Freedom axial magnetic bearing rotational loss; When the realization system reduces axial length, can reduce the rotational loss under the high speed greatly.
Description of drawings
The axial magnetic bearing stator structure schematic representation that Fig. 1 radially reverses for may command of the present invention.
The axial magnetic bearing stator structure schematic representation that Fig. 2 radially reverses for may command of the present invention.
The axial magnetic bearing rotor assembly schematic representation that Fig. 3 radially reverses for may command of the present invention.
Among the figure: 1, interior ring stator iron core magnetic pole; 2, outer shroud stator iron core magnetic pole; 3, permanent magnet; 4, coil; 5, magnetic air gap; 6, rotor.
Embodiment
Like Fig. 1, Fig. 2 and shown in Figure 3; The axial magnetic bearing that may command of the present invention radially twists; Be made up of stator module and rotor 6, stator module is made up of interior ring stator iron core magnetic pole 1, outer shroud stator iron core magnetic pole 2, permanent magnet 3 and coil 4, and center of gravity line and another center of gravity line to outer shroud stator iron core magnetic pole 2 of ring stator iron core magnetic pole 1 is perpendicular in one pair; Promptly wherein interior ring stator iron core magnetic pole 1 has two; Edge+X ,-directions X, outer shroud stator iron core magnetic pole 2 has two, edge+Y ,-the Y direction; The perhaps interior ring stator iron core magnetic pole 1 of two axial magnetic bearings edge+Y and-Y direction placement simultaneously; Outer shroud stator iron core magnetic pole 2 is edge+X and-directions X placement simultaneously; Be wound with coil 4 on each stator iron core magnetic pole; Form axial magnetic air gap 5 between interior ring stator iron core magnetic pole 1 and outer shroud stator iron core magnetic pole 2 and the rotor 6, the radially inner side of permanent magnet 3 links to each other with interior ring stator iron core magnetic pole 1, and radial outside links to each other with outer shroud stator iron core magnetic pole 2.Relative position relation as can beappreciated from fig. 2 between ring stator iron core magnetic pole, outer shroud stator iron core magnetic pole, permanent magnet and the coil, Fig. 3 has provided axial magnetic bearing rotor assembly schematic representation.
The axial magnetic air gap 5 that forms between ring stator iron core magnetic pole 1 and outer shroud stator iron core magnetic pole 2 and the rotor 6 in described is 0.2-0.4mm.
When as installed; Preferably use axial magnetic bearing of the present invention in pairs; The stator iron core magnetic pole that guarantees two axial magnetic bearings up and down over against; Interior ring stator iron core 1 magnetic pole that promptly guarantees two axial magnetic bearings simultaneously edge+X is simultaneously placed with-directions X, and outer shroud stator iron core magnetic pole 2 simultaneously edge+Y and-placement of Y direction.Because coil 4 energisings of interior ring stator iron core magnetic pole 1 only form the loop between interior ring iron core; Coil 4 energising of outer shroud stator iron core magnetic pole 2 only forms the loop between the outer shroud iron core, therefore the size of current in the coil 4 of coil 4 through ring stator iron core magnetic pole 1 in controlling and outer shroud stator iron core magnetic pole 2 and direction just can realize that to rotor 6 generations radially twist the control of direction.
The used interior ring stator iron core magnetic pole 1 of the present invention can be processed with magnetic property good electric thin steel sheet such as magnetic materials such as electrical steel plate DR510, DR470, DW350,1J50,1J79 or silicon steel thin belt with outer shroud stator iron core magnetic pole 2; The thrust disc that rotor 6 is processed for the good material of magnetic property such as electrical pure iron, 1J50,1J79 etc., the part of system's rotating part of perhaps processing for the good material of magnetic property such as electrical pure iron, silicon steel etc.; The material of permanent magnet 3 is good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and is radial magnetizing, and paint-dipping drying forms after the good electromagnetic wire coiling of coil 4 usefulness conductions.
Need to prove, further reduce the power consumption of axial magnetic bearing if desired, can adopt the nanocrystalline soft magnetic material coiling of low AC loss that waits to form respectively interior ring stator iron core magnetic pole 1 and outer shroud stator iron core magnetic pole 2 and rotor.
In addition, axial magnetic bearing according to the invention is particularly suitable for control and radially reverses, and when practical application, need utilize the radial space increase of system that the single-degree-of-freedom axial magnetic bearing of axial translation only is provided.
The content of not doing in the specification of the present invention to describe in detail belongs to related domain professional and technical personnel's known prior art.
Claims (6)
1. axial magnetic bearing that may command is radially reversed; It is characterized in that: the stator module that comprises rotor (6) and be arranged on the rotor top; Stator module comprises permanent magnet and four stator iron core magnetic poles; These four stator iron core magnetic poles circumferentially are distributed on the permanent magnet periphery; And ring stator iron core magnetic pole (1) links to each other with the radially inner side of permanent magnet (3) in a couple who wherein is oppositely arranged, and another of remainder links to each other to the radial outside of outer shroud stator iron core magnetic pole (2) with permanent magnet (3), and the center of gravity line and another the center of gravity line to outer shroud stator iron core magnetic pole (2) that encircle stator iron core magnetic pole (1) in one pair are perpendicular; Be wound with coil (4) on each stator iron core magnetic pole, form axial magnetic air gap (5) between interior ring stator iron core magnetic pole (1) and outer shroud stator iron core magnetic pole (2) and the rotor (6).
2. the axial magnetic bearing that may command according to claim 1 is radially reversed is characterized in that: described permanent magnet (3) is a radial magnetizing.
3. the axial magnetic bearing that may command according to claim 1 and 2 is radially reversed is characterized in that: the axial magnetic air gap (5) that forms between ring stator iron core magnetic pole (1) and outer shroud stator iron core magnetic pole (2) and the rotor (6) in described is 0.2-0.4mm.
4. the axial magnetic bearing that may command according to claim 3 is radially reversed is characterized in that: described permanent magnet (3) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to process.
5. the axial magnetic bearing that may command according to claim 3 is radially reversed is characterized in that: ring stator iron core magnetic pole (1) and outer shroud stator iron core magnetic pole (2) adopt the good material of magnetic property to be overrided to form in described.
6. the axial magnetic bearing that may command according to claim 3 is radially reversed; It is characterized in that: the thrust disc that described rotor (6) is processed for the good material of magnetic property, the part of system's rotating part of perhaps processing for the good material of magnetic property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210027614XA CN102537048A (en) | 2012-02-08 | 2012-02-08 | Axial magnetic bearing capable of controlling radial twisting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210027614XA CN102537048A (en) | 2012-02-08 | 2012-02-08 | Axial magnetic bearing capable of controlling radial twisting |
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| CN102537048A true CN102537048A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210027614XA Pending CN102537048A (en) | 2012-02-08 | 2012-02-08 | Axial magnetic bearing capable of controlling radial twisting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897486A (en) * | 2015-05-20 | 2015-09-09 | 西北工业大学 | Electromagnetic torsional split-Hopkinson bar loading device |
| CN106678176A (en) * | 2016-11-11 | 2017-05-17 | 浙江大学 | Modular radial single-freedom-degree hybrid magnetic suspension bearing |
| CN109831056A (en) * | 2019-01-25 | 2019-05-31 | 江苏大学 | Virtual shaft type energy storage device of magnetic suspension flywheel for electric vehicle |
| CN110131314A (en) * | 2019-06-12 | 2019-08-16 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN112366911A (en) * | 2020-09-27 | 2021-02-12 | 合肥珀利机电设备有限公司 | Permanent magnet axial flux magnetic suspension motor and fan |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3819205A1 (en) * | 1987-12-12 | 1989-06-22 | Teldix Gmbh | Bearing for the radial and axial support of a rotor with a large radial extension |
| US5973430A (en) * | 1993-11-09 | 1999-10-26 | Societe De Mecanique Magnetique | Device for mounting and driving a spindle, particularly a textile spindle |
| JP2007056892A (en) * | 2005-08-22 | 2007-03-08 | Iwaki Co Ltd | Magnetic bearing |
| CN101054997A (en) * | 2007-04-26 | 2007-10-17 | 北京航空航天大学 | Permanent-magnetic biased axial magnetic bearing |
-
2012
- 2012-02-08 CN CN201210027614XA patent/CN102537048A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3819205A1 (en) * | 1987-12-12 | 1989-06-22 | Teldix Gmbh | Bearing for the radial and axial support of a rotor with a large radial extension |
| US5973430A (en) * | 1993-11-09 | 1999-10-26 | Societe De Mecanique Magnetique | Device for mounting and driving a spindle, particularly a textile spindle |
| JP2007056892A (en) * | 2005-08-22 | 2007-03-08 | Iwaki Co Ltd | Magnetic bearing |
| CN101054997A (en) * | 2007-04-26 | 2007-10-17 | 北京航空航天大学 | Permanent-magnetic biased axial magnetic bearing |
Non-Patent Citations (2)
| Title |
|---|
| LI YONG,ETC: "Computer-Aided Simulation Analysis of a Novel Structure", 《IEEE TRANSACTIONS ON MAGNETICS》 * |
| 王曦 等: "轴向力偏转五自由度永磁偏置磁轴承及磁路解耦设计", 《中国电机工程学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897486A (en) * | 2015-05-20 | 2015-09-09 | 西北工业大学 | Electromagnetic torsional split-Hopkinson bar loading device |
| CN106678176A (en) * | 2016-11-11 | 2017-05-17 | 浙江大学 | Modular radial single-freedom-degree hybrid magnetic suspension bearing |
| CN106678176B (en) * | 2016-11-11 | 2019-05-31 | 浙江大学 | A kind of modular radial single-degree-of-freedom hybrid magnetic suspension bearing |
| CN109831056A (en) * | 2019-01-25 | 2019-05-31 | 江苏大学 | Virtual shaft type energy storage device of magnetic suspension flywheel for electric vehicle |
| CN110131314A (en) * | 2019-06-12 | 2019-08-16 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, motor, compressor and air conditioner |
| CN112366911A (en) * | 2020-09-27 | 2021-02-12 | 合肥珀利机电设备有限公司 | Permanent magnet axial flux magnetic suspension motor and fan |
| CN112366911B (en) * | 2020-09-27 | 2021-09-24 | 江苏中工高端装备研究院有限公司 | Permanent magnet axial flux magnetic suspension motor and fan |
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Application publication date: 20120704 |