CN100487258C - Axial magnetic bearing for magnetic levitation flywheel - Google Patents
Axial magnetic bearing for magnetic levitation flywheel Download PDFInfo
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- CN100487258C CN100487258C CNB2007100987494A CN200710098749A CN100487258C CN 100487258 C CN100487258 C CN 100487258C CN B2007100987494 A CNB2007100987494 A CN B2007100987494A CN 200710098749 A CN200710098749 A CN 200710098749A CN 100487258 C CN100487258 C CN 100487258C
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- rotor
- axial
- magnetic bearing
- magnetic
- axial magnetic
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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
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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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/55—Flywheel systems
Abstract
An axial magnetic bearing for magnetic suspension flywheel is composed of a stator and a rotor, the stator is composed of four group of stator cores, and windings, the four group of stator cores compose eight stator poles on circumference direction and are put along +X, -X, +Y, -Y direction, each stator core pole is winded with a winding. An axial magnetic gas gap is formed between the stator and the rotor. The invention can realize the axial movement and radial twist control for the magnetic suspension rotor by the four group of stator cores distributed in +X, -X, +Y, -Y direction, and can greatly reduce the axial size of the system. The axial magnetic bearing also has the advantages of non-biased, low power consume and reliable property.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of axial magnetic bearing for magnetic levitation flywheel can be used as the contactless support of rotary component in the astrovehicle such as microminiature satellite, is specially adapted to the non-contact supporting of magnetically levitated flywheel.
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, therefore operating current is big, power consumption is big, 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.But existing permanent-magnetic biased axial magnetic bearing, its electromagnetic circuit is through permanent magnet, thereby still power consumption is big, Chinese patent application number: the 200510011272.2 a kind of permanent-magnetic biased axial magnetic bearings that provide, as shown in Figure 1, this structure can be so that electromagnetic circuit process bearing support 11 by excitatory air gap 15, air gap and this excitatory air gap 15 form the loop, avoided electromagnetic circuit directly to pass through permanent magnet 13, thereby it is low in energy consumption, but the axial magnetic bearing of existing all structures, its stationary part and rotor portion all adopt entity structure, thereby still bigger in the stator and the iron loss in the rotor of entity structure.The more important thing is that existing axial magnetic bearing stator structure all is a completely circular structure, can only carry out axial translation control, can't utilize axial magnetic bearing that rotor is radially twisted control, thereby be restricted in applications such as magnetically levitated flywheels to rotor.This is because in applications such as magnetically levitated flywheel, it usually requires the flywheel axial length little and radial length is big, and existing magnetically levitated flywheel, in order to realize radially translation and radially twisting control, need to use in pairs radial direction magnetic bearing, so axial length is long, if axial magnetic bearing self can radially twist control, radial direction magnetic bearing just can adopt one so, and rotor is only carried out radially translation control, can reduce the axial dimension of flywheel greatly.In addition, no matter be electromagnetism biased magnetic bearing or permanent magnet biased magnetic bearing, it is because the big displacement negative stiffness that biasing produces can influence the High Accuracy Control of magnetically levitated flywheel, this is because the major function of magnetically levitated flywheel is acceleration and deceleration output torque by fly-wheel motor are equipped with the astrovehicles such as satellite of magnetically levitated flywheel with adjustment a attitude, for making it not produce disturbance torque to celestial body, need make the magnetically levitated flywheel rotor around its principal inertia axis rotation, eliminate the same frequency disturbance that rotor unbalance is introduced, but the displacement negative stiffness that the bias magnetic field of electromagnetism biasing or permanent magnet biased magnetic bearing produces can produce disturbing moment when little skew takes place rotor, fine compensation is difficulty very, this High Accuracy Control for magnetically levitated flywheel is disadvantageous, in a word, existing axial magnetic bearing exists power consumption big, can't radially twist control and be difficult to satisfy the defective of magnetically levitated flywheel axial length and High Accuracy Control requirement.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of do not have biasing, low in energy consumption, can carry out the axial translation and the axial magnetic bearing for magnetic levitation flywheel of twisting control radially.
Technical solution of the present invention is: be made up of stationary part and rotor, stationary part is made up of 4 stator cores and coil, 4 stator cores constitute 8 stator core magnetic poles on the whole circumference direction, and edge+X ,-X ,+Y ,-placement of Y direction, be wound with coil on each stator core magnetic pole, form the axial magnetic air gap between stationary part and the rotor.
The axial magnetic air gap that forms between described stator core and the rotor is 0.2-0.4mm; Described rotor is the thrust disc that the good material of magnetic property is made, the perhaps part of the flywheel rotor of making for the good material of magnetic property.Described stator core adopts the good material of magnetic property to be overrided to form.
The principle of such scheme is: the magnetic field that utilizes coil to produce keeps magnetic bearing rotor air gap even, and makes rotor obtain contactless support.Shown in Fig. 2 solid arrow, electromagnetic circuit of the present invention constitutes the closed-loop path by stator core magnetic pole, air gap and rotor.Because stator core partly adopts the lamination compacting to form, and eddy current loss unshakable in one's determination is directly proportional with lamination thickness, the stator that therefore adopts lamination is than having the power consumption that the axial magnetic bearing with entity structure stator has reduced magnetic bearing now.In order to realize axial translation and the radially control of twisting, axial magnetic bearing of the present invention needs to use in pairs, be defined as I and II respectively, the magnetic pole that guarantees two axial magnetic bearings during installation over against, 4 stator cores that promptly guarantee two axial magnetic bearings simultaneously respectively edge+X ,-X ,+Y and-the Y placement.When carrying out translation control for axial magnetic bearing, if axial magnetic bearing rotor along z axially+the z direction translational, the stationary part of axial magnetic bearing I and the air gap between the rotor reduce, the stationary part of axial magnetic bearing II and the air gap between the rotor increase, this moment, directions X and the Y direction coil of axial magnetic bearing II fed electric current, made between the stationary part of axial magnetic bearing II and the rotor air gap place produce electromagnetic force and made rotor return to the equilibrium position; In like manner, when axial magnetic bearing rotor along z axially-during the z direction translational, the stationary part of axial magnetic bearing II and the air gap between the rotor reduce, the stationary part of axial magnetic bearing I and the air gap between the rotor increase, this moment, directions X and the Y direction coil of axial magnetic bearing I fed electric current, made between the stationary part of axial magnetic bearing I and the rotor air gap place produce electromagnetic force and made rotor return to the equilibrium position; When the rotor of axial magnetic bearing is radially twisted control, if axial magnetic bearing rotor twists around directions X owing to disturbance, make the stationary part of axial magnetic bearing I+Y direction and the magnetic air gap between the rotor reduce, the stationary part of-Y direction and the magnetic air gap between the rotor increase, and the stationary part of axial magnetic bearing II+Y direction and the magnetic air gap between the rotor increase, the stationary part of-Y direction and the magnetic air gap between the rotor reduce, make the stator core pole coil of axial magnetic bearing I-Y direction and axial magnetic bearing II+Y direction feed electric current by the axial magnetic bearing controller this moment, make the stator core magnetic pole of axial magnetic bearing I-Y direction and axial magnetic bearing II+Y direction produce electromagnetic force, rotor is returned to original equilibrium position, realize twisting control around directions X.In like manner, when axial magnetic bearing rotor twists around the Y direction owing to disturbance, make the stationary part of axial magnetic bearing I+X direction and the magnetic air gap between the rotor reduce, the stationary part of-directions X and the magnetic air gap between the rotor increase, and the stationary part of axial magnetic bearing II+X direction and the magnetic air gap between the rotor increase, the stationary part of-directions X and the magnetic air gap between the rotor reduce, make the magnetic pole of the stator coil of axial magnetic bearing I-X direction and axial magnetic bearing II+X direction feed electric current by the axial magnetic bearing controller this moment, make the magnetic pole of the stator of axial magnetic bearing I-X direction and axial magnetic bearing II+X direction produce electromagnetic force, rotor is returned to original equilibrium position, realize twisting control around the Y direction.
The present invention's advantage compared with prior art is: the stationary part of axial magnetic bearing of the present invention has adopted 4 stator lasmination iron cores, and the bias magnetic field that does not have electromagnetism or permanent magnetism to introduce, and has therefore reduced the magnetic bearing power consumption.Because the present invention adopts 48 stator core magnetic poles on the stator cores formation whole circumference direction, and edge+X ,-X ,+Y ,-placement of Y direction, thereby the axial translation that not only can realize rotor is controlled, but also can realize radially twisting control, this makes the radial direction magnetic bearing of existing magnetic bearing-supported flywheel system only use one, and rotor is only realized that radially translation control gets final product, and has reduced the axial dimension of flywheel greatly; Because axial magnetic bearing of the present invention does not have biasing, be easy to realize lower axial translation integral stiffness and radially reverse integral stiffness, again so can easily realize the High Accuracy Control of magnetically levitated flywheel.
Description of drawings
Fig. 1 is the permanent-magnetic biased axial magnetic bearing sectional view of patent applied for.
Fig. 2 is an axial magnetic bearing axial, cross-sectional view of the present invention.
Fig. 3 is an axial magnetic bearing end view drawing of the present invention.
Structural drawing when Fig. 4 is an axial magnetic bearing as installed of the present invention, wherein (a) is axial, cross-sectional view, (b) is end view drawing.
Embodiment
As shown in Figures 2 and 3, the present invention is made up of stationary part and rotor 1, stationary part is made up of 4 stator cores 2 and coil 3,48 stator core magnetic poles that stator core 2 constitutes on the whole circumference direction, and edge+X ,-X ,+Y ,-placement of Y direction, for the sectional area that increases the stator core magnetic pole to improve the bearing capacity of axial magnetic bearing, the area of stator core magnetic pole is made arc surface.Be wound with coil 3 on each stator core magnetic pole, form axial magnetic air gap 4 between stationary part and the rotor.Wherein stator core 2 is 0.2-0.4mm with the axial magnetic air gap 4 that rotor portion 1 forms.In order to realize axial translation and the radially control of twisting, axial magnetic bearing of the present invention needs to use in pairs, be defined as I and II respectively, the magnetic pole that guarantees two axial magnetic bearings during installation over against, 4 stator cores that promptly guarantee two axial magnetic bearings simultaneously respectively edge+X ,-X ,+Y and-the Y placement.When carrying out translation control for axial magnetic bearing, if axial magnetic bearing rotor along z axially+the z direction translational, the stationary part of axial magnetic bearing I and the air gap between the rotor reduce, the stationary part of axial magnetic bearing II and the air gap between the rotor increase, this moment, directions X and the Y direction coil of axial magnetic bearing II fed electric current, made between the stationary part of axial magnetic bearing II and the rotor air gap place produce electromagnetic force and made rotor return to the equilibrium position; In like manner, when axial magnetic bearing rotor along z axially-during the z direction translational, the stationary part of axial magnetic bearing II and the air gap between the rotor reduce, the stationary part of axial magnetic bearing I and the air gap between the rotor increase, this moment, directions X and the Y direction coil of axial magnetic bearing I fed electric current, made between the stationary part of axial magnetic bearing I and the rotor air gap place produce electromagnetic force and made rotor return to the equilibrium position; When the rotor of axial magnetic bearing is radially twisted control, if axial magnetic bearing rotor twists around directions X owing to disturbance, make the stationary part of axial magnetic bearing I+Y direction and the magnetic air gap between the rotor reduce, the stationary part of-Y direction and the magnetic air gap between the rotor increase, and the stationary part of axial magnetic bearing II+Y direction and the magnetic air gap between the rotor increase, the stationary part of-Y direction and the magnetic air gap between the rotor reduce, make the stator core pole coil of axial magnetic bearing I-Y direction and axial magnetic bearing II+Y direction feed electric current by the axial magnetic bearing controller this moment, make the stator core magnetic pole of axial magnetic bearing I-Y direction and axial magnetic bearing II+Y direction produce electromagnetic force, rotor is returned to original equilibrium position, realize twisting control around directions X.In like manner, when axial magnetic bearing rotor twists around the Y direction owing to disturbance, make the stationary part of axial magnetic bearing I+X direction and the magnetic air gap between the rotor reduce, the stationary part of-directions X and the magnetic air gap between the rotor increase, and the stationary part of axial magnetic bearing II+X direction and the magnetic air gap between the rotor increase, the stationary part of-directions X and the magnetic air gap between the rotor reduce, make the magnetic pole of the stator coil of axial magnetic bearing I-X direction and axial magnetic bearing II+X direction feed electric current by the axial magnetic bearing controller this moment, make the magnetic pole of the stator of axial magnetic bearing I-X direction and axial magnetic bearing II+X direction produce electromagnetic force, rotor is returned to original equilibrium position, realize twisting control around the Y direction.The used stator core 2 of the present invention can form with magnetic property good electric thin steel sheet such as magnetic material punching presses such as electrical steel plate DR510, DR470, DW350,1J50,1J79 or the silicon steel thin belt system of changing; The thrust disc that rotor 1 is made for the good material of magnetic property such as electrical pure iron, 1J50,1J79 etc., the perhaps part of the flywheel rotor of making for the good material of magnetic property such as electrical pure iron, S06 steel etc.; Paint-dipping drying forms after the good electromagnetic wire coiling of field coil 5 usefulness conductions.
In actual applications, the axial magnetic bearing stator outside as shown in Figure 2 will be equipped with bearing support, and as shown in Figure 4,5 is bearing support among the figure, selects for use non-magnet material to make, as copper, aluminium, titanium alloy etc.Fig. 4 (a) is the axial, cross-sectional view that has the axial magnetic bearing of the present invention of bearing support, (b) for having the end view drawing of axial magnetic bearing of the present invention of bearing support, adopt among the figure screw and restraint zone will along+X ,-X ,+Y ,-4 stator cores that the Y direction is placed fix.
The content that is not described in detail in the specification of the present invention belongs to related domain professional and technical personnel's known prior art.
Claims (5)
1, a kind of axial magnetic bearing for magnetic levitation flywheel, it is characterized in that: form by stationary part and rotor (1), stationary part is made up of 4 stator cores (2) and coil (3), 4 stator cores (2) constitute 8 stator core magnetic poles on the whole circumference direction, and edge+X ,-X ,+Y ,-placement of Y direction, be wound with coil (3) on each stator core magnetic pole, form axial magnetic air gap (4) between stationary part and the rotor.
2, axial magnetic bearing for magnetic levitation flywheel according to claim 1 is characterized in that: the axial magnetic air gap (4) that forms between described stator core (2) and the rotor (1) is 0.2-0.4mm.
3, axial magnetic bearing for magnetic levitation flywheel according to claim 1 is characterized in that: described stator core (2) adopts the good material of magnetic property to be overrided to form.
4, axial magnetic bearing for magnetic levitation flywheel according to claim 1 is characterized in that: the thrust disc that described rotor (1) is made for the good material of magnetic property, the perhaps part of the flywheel rotor of making for the good material of magnetic property.
5, axial magnetic bearing for magnetic levitation flywheel according to claim 1 is characterized in that: described axial magnetic bearing needs to use in pairs, and rotor (1) is carried out axial translation control and radially twisting control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100987494A CN100487258C (en) | 2007-04-26 | 2007-04-26 | Axial magnetic bearing for magnetic levitation flywheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100987494A CN100487258C (en) | 2007-04-26 | 2007-04-26 | Axial magnetic bearing for magnetic levitation flywheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054998A CN101054998A (en) | 2007-10-17 |
| CN100487258C true CN100487258C (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100987494A Expired - Fee Related CN100487258C (en) | 2007-04-26 | 2007-04-26 | Axial magnetic bearing for magnetic levitation flywheel |
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| CN (1) | CN100487258C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476593B (en) * | 2009-01-20 | 2010-11-03 | 武汉理工大学 | Reversing differential driven magnetic bearing |
| CN102359490B (en) * | 2011-08-31 | 2013-03-20 | 北京航空航天大学 | Five-freedom radial decoupling conical magnetic bearing |
| CN108988517B (en) * | 2018-07-18 | 2020-09-25 | 江苏大学 | Axial suspension switch reluctance motor |
| CN111434940B (en) * | 2019-01-14 | 2021-12-28 | 坎德拉（深圳）科技创新有限公司 | Flywheel energy storage device and integrated magnetic bearing |
| CN113131706B (en) * | 2021-04-27 | 2022-04-29 | 山东大学 | Disc type permanent magnet synchronous motor, energy storage flywheel and method |
| CN113623319B (en) * | 2021-07-08 | 2023-06-30 | 安徽华驰动能科技有限公司 | Magnetic suspension bearing with safety braking protection function |
-
2007
- 2007-04-26 CN CNB2007100987494A patent/CN100487258C/en not_active Expired - Fee Related
Non-Patent Citations (7)
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| 一种新型转子磁体永磁偏置混合磁轴承. 顿月芹，徐衍亮.山东大学学报（工学版），第34卷第5期. 2004 |
| 一种新型转子磁体永磁偏置混合磁轴承. 顿月芹，徐衍亮.山东大学学报(工学版)，第34卷第5期. 2004 * |
| 三自由度永磁偏置混合磁轴承数控系统研究. 刘贤兴，朱熀秋，全力等.中国机械工程，第15卷第24期. 2004 |
| 三自由度永磁偏置混合磁轴承数控系统研究. 刘贤兴，朱熀秋，全力等.中国机械工程，第15卷第24期. 2004 * |
| 轴向混合磁轴承工作原理和参数设计. 贾红云，朱熀秋.应用科学学报，第24卷第1期. 2006 |
| 轴向磁轴承电磁参数的计算. 龙至强.磁性材料及器件，第31卷第5期. 2000 |
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| Publication number | Publication date |
|---|---|
| CN101054998A (en) | 2007-10-17 |
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