CN102032270B - Permanent magnetic and electromagnetic mixed radial bearing - Google Patents
Permanent magnetic and electromagnetic mixed radial bearing Download PDFInfo
- Publication number
- CN102032270B CN102032270B CN2011100087529A CN201110008752A CN102032270B CN 102032270 B CN102032270 B CN 102032270B CN 2011100087529 A CN2011100087529 A CN 2011100087529A CN 201110008752 A CN201110008752 A CN 201110008752A CN 102032270 B CN102032270 B CN 102032270B
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- magnetic
- stator core
- permanent
- stator
- bearing
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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
- F16C32/0459—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
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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
- F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a permanent magnetic and electromagnetic mixed radial bearing, which consists of a rotor core, permanent magnets, stator cores, coils, an air gap and auxiliary air gaps, wherein magnetic poles of four stator cores are uniformly distributed on the circumference along four directions of +X, -X, +Y and -Y, and are wound with the coils at the periphery; four permanent magnets are embedded between magnetic poles of two adjacent stator cores at intervals, and are arranged at 90 degrees on the circumference of a stator; a certain gap is reserved between the inner surfaces of the stator cores and the outer surface of the rotor core to form the air gap; the auxiliary air gaps with different sizes are formed between stator cores on two sides of the permanent magnets; and sectional areas of magnetic poles of the stator cores with different sizes are adopted in the bearing direction. The bearing solves the problem of heavy weight of the conventional permanent magnetic and electromagnetic mixed radial bearing, and has the advantages of small volume, low energy consumption, reliable performance, contribution to control and the like.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of permanent-magnett electromagnetic mixing inner rotor radial bearing low in energy consumption can be used as the contactless support of rotary component.
Background technique
Magnetic suspension bearing divides pure electromagnetic type and permanent magnet bias to power up the hybrid magnetic suspension bearing of magnetic control system; The former uses, and electric current is big, power consumption is big; Permanent magnet bias powers up the hybrid magnetic suspension bearing of magnetic control system, and main bearing capacity is born in the magnetic field that permanent magnet produces, and electromagnetism magnetic field provides auxiliary adjusting bearing capacity; Thereby this bearing can reduce to control electric current greatly, reduces the wastage.But present permanent magnet biased internal rotor radial magnetic bearing structure; Some is on the basis of common radial magnetic bearing; To placing permanent magnet, the magnetic flux that control coil produced like this will pass permanent magnet on electromagnetic circuit, because the permanent magnet magnetic resistance is very big; Thereby control coil will produce the certain electromagnetic magnetic flux and need bigger exciting curent, and this obviously can increase the power consumption of bearing; Certain structures is that permanent magnet is directly linked to each other with stator lasmination is unshakable in one's determination, and permanent magnetic circuit can lose too much magnetomotive force when vertically passing stator core like this, thereby can weaken the suction of permanent magnet to rotor shaft greatly.Also some structure is that permanent magnet is linked to each other with laminated core through magnetic guiding loop; Electromagnetic circuit forms the loop through laminated core; The permanent magnetism magnetomotive force can not produce loss in laminated core like this, and electric magnetic excitation circuit can not passed through permanent magnet itself yet simultaneously, but its plane, permanent magnetic circuit place of the radial direction magnetic bearing of this structure is vertical each other with plane, electromagnetic circuit place; Thereby can cause axial length longer, so can not satisfy little, the lightweight requirement of volume.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiency of existing technology, provide that a kind of volume is little, low in energy consumption, the permanent-magnett electromagnetic mixing inner rotor radial bearing of convenient processing and manufacture.
Technical solution of the present invention is: be made up of rotor core, permanent magnet, stator core, coil, magnetic air gap, auxiliary air gap; 4 stator core magnetic poles are distributed on the circumference; Wherein the permanent magnet of 4 parallel magnetizations places between adjacent two stator core magnetic poles at interval, and on stator circumference, is 90 degree and places, 4 stator core magnetic pole edge+X ,-X ,+Y and-distribution of Y direction; And be wound with coil around it; Stator core internal surface and rotor core outer surface leave the gap, form magnetic air gap, and permanent magnet adopts neodymium iron boron to process.Between the stator core of permanent magnet both sides, form the auxiliary air gap of two different sizes, one of them auxiliary air gap is another 2 times, and the stator core magnetic pole on the load-bearing direction varies in size.
Described rotor core and stator core all adopt the folded vertically system of silicon steel plate to form.
The silicon steel plate sheet that described rotor core and stator core are adopted is thick to be 0.2mm, 0.35mm or 0.5mm.
When+directions X load-bearing, the stator core magnet pole widths of described+directions X is-1.5～2 times of the stator core magnet pole widths of directions X; When+Y direction load-bearing, the stator core magnet pole widths of described+Y direction is-1.5～2 times of the stator core magnet pole widths of Y direction.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing; Bear the suffered radial force of magnetic bearing, regulating action is played in the magnetic field that coil produced, and is used for changing the power in magnetic field on X, the Y direction; Keep magnetic bearing stator-rotator magnetic air gap even, and make rotor obtain contactless supporting.Shown in Fig. 2 solid line; Permanent magnetic circuit main magnetic circuit of the present invention path is: magnetic flux is from the permanent magnet N utmost point; Through-directions X stator core magnetic pole ,-the directions X magnetic air gap is to rotor core, then process+Y direction magnetic air gap ,+the stator core magnetic pole of Y direction gets back to the permanent magnet S utmost point, the main magnetic circuit of formation magnetic bearing; Because permanent magnet has 4, so permanent magnetic circuit has 4 (in the accompanying drawings 2 in order to illustrate only to draw two); Shown in Fig. 2 dotted line; Electromagnetic circuit main magnetic circuit path is: the stator core magnetic pole of electromagnetism magnetic flux on the+Y direction, through auxiliary air gap (for the sake of clarity; Only draw electromagnetic circuit in the accompanying drawing 2 through an auxiliary air gap; In fact the electromagnetic circuit of each part is simultaneously through two auxiliary air gaps) ,+X and-the stator core magnetic pole of X both direction and magnetic air gap, rotor core ,+magnetic air gap of Y direction gets back to+stator core magnetic pole on the Y direction; Constitute the closed-loop path, 8 altogether of electromagnetic circuits.Guaranteed that so not only electromagnetic circuit is not inner through permanent magnet; Reduce the magnetic resistance of electromagnetic circuit, reduced electric current, and then reduced the power consumption of bearing; Make again simultaneously permanent magnetic circuit in arbitrary radial cross section with the electromagnetic circuit coplane; Reduced axial dimension, and magnetic pole of the stator only needs 4, thereby reduced the weight and volume of radial direction magnetic bearing greatly.
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, so power consumption is very low; Compare with existing permanent magnet biased magnetic bearing; Its permanent magnetic circuit of inner rotor radial magnetic bearing and electromagnetic circuit coplane in arbitrary radial cross section that permanent-magnett electromagnetic of the present invention mixes; Reduce the axial dimension of radial direction magnetic bearing; And this magnetic bearing only needs 4 stator core magnetic poles, thereby can further reduce the weight and volume of radial direction magnetic bearing.In addition; The present invention has adopted the design of the auxiliary air gap of two different sizes; Make that the stator core processing and assembling is convenient; Make the magnetic bearing performance more optimize, avoided existing certain structures to adopt the magnetomotive defective of the part a part of permanent magnet of saturated loss unshakable in one's determination in order to make permanent magnet in air gap, produce enough bias magnetic fields, the present invention has simultaneously adopted the structure of different big or small magnetic pole of the stator on the load-bearing direction; Make and the difference of exerting oneself of magnetic pole of the stator on the load-bearing direction greatly reduce shaft current.
Description of drawings
Fig. 1 is permanent-magnett electromagnetic hybrid radial bearing face figure of the present invention.
Fig. 2 is the permanent-magnett electromagnetic hybrid radial bearing face figure that has the magnetic circuit trend of the present invention.
Embodiment
As shown in Figure 1; A kind of permanent-magnett electromagnetic hybrid radial bearing; Be made up of rotor core 1, permanent magnet 2, stator core 3, coil 5, magnetic air gap 4, auxiliary air gap 6,4 stator core 3 magnetic poles are distributed on the circumference, and wherein the permanent magnet 2 of 4 parallel magnetizations places between adjacent two stator core 3 magnetic poles at interval; And on stator circumference, be 90 degree and place; 4 stator core 3 magnetic pole edge+X ,-X ,+Y and-the Y direction distributes, and is wound with coil 5 around it, permanent magnet 2 is through two adjacent stator core 3 magnetic poles formation X, the bias magnetic field on the Y direction.Processing and assembling for the ease of parts; Stator core 3 internal surfaces and rotor core 1 outer surface leave the magnetic air gap 4 of 0.5mm; Between the stator core 3 of permanent magnet 2 both sides, form the auxiliary air gap 6 of two different sizes; One of them auxiliary gap length is another 2 times, and two auxiliary gap lengths in the present embodiment are respectively 0.8mm and 1.6mm; The bias magnetic field that permanent magnet 2 forms on X, the Y direction through adjacent two stator cores 3 and magnetic air gap 4; Permanent magnet magnetization direction length is 5mm; Perpendicular magnetization direction length is 6mm; The distance of (being vertical permanent magnet magnetization direction length and the radial direction length sum of two auxiliary air gaps) is 2 times a vertical permanent magnet magnetization direction length between stator tooth external diameter and the frame diameter; Be 12mm, such design has guaranteed that permanent magnet is minimum from the loss of the magnetomotive force in two auxiliary air gaps.
In order to reduce power consumption when the bearing load-bearing, when using bearing according to the invention, the big end of stator core 3 width on the load-bearing direction is 1.5～2 times of small end.In the present embodiment, when+directions X load-bearing, the stator core magnet pole widths of described+directions X is-2 times of the stator core magnet pole widths of directions X; When+Y direction load-bearing, the stator core magnet pole widths of described+Y direction is-2 times of the stator core magnet pole widths of Y direction.Because the magnetic pole area of the positive minus side of load-bearing direction is different, make the varying in size of the power that in air gap, produces when feeding same current, so the magnetic bearing structure of non-symmetry structure is particularly suitable for the fixedly occasion of bearing mode.When-directions X load-bearing, the stator core magnet pole widths of described-directions X is+2 times of the stator core magnet pole widths of directions X; When-Y direction load-bearing; The stator core magnet pole widths of described-Y direction is+2 times of the stator core magnet pole widths of Y direction; The magnet pole widths (under the identical axial length condition) of different sizes can be so that the power that varies in size that bias magnetic field produces in magnetic air gap; Therefore under the condition of same bearer power, the size of control electric current in the coil 5 can be reduced, therefore the magnetic bearing power consumption can be reduced.
When concrete the application, permanent-magnett electromagnetic hybrid radial bearing of the present invention should use in pairs.
Used rotor core 1, the stator core 3 of the present invention can form general thick 0.2mm, 0.35mm or the 0.5mm of electing as of silicon steel plate sheet with magnetic property good electric thin steel sheet such as the folded system of magnetic material punching presses such as electrical pure iron, electrical steel plate DR610, DR270, DW360 or silicon steel thin belt.The material of permanent magnet 2 is that the neodymium iron boron of magnetic property good (magnetic energy product is bigger) is processed, and also can be rare-earth permanent magnet or ferrite permanent magnet, and coil 5 usefulness conduct electricity that paint-dipping drying forms after the good electromagnetic wire coiling.
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 (4)
1. permanent-magnett electromagnetic hybrid radial bearing; It is characterized in that: form by rotor core (1), permanent magnet (2), stator core (3), coil (5), magnetic air gap (4), auxiliary air gap (6); 4 stator cores (3) magnetic pole is distributed on the circumference, and wherein the permanent magnet of 4 parallel magnetizations (2) places between adjacent two stator cores (3) magnetic pole at interval, and on stator circumference, is 90 degree placements; 4 stator cores (3) magnetic pole edge+X ,-X ,+Y and-the Y direction distributes; And be wound with coil (5) around it, stator core (3) internal surface and rotor core (1) outer surface leave the gap, form magnetic air gap (4); Permanent magnet (2) adopts neodymium iron boron to process; Between the stator core (3) of permanent magnet (2) both sides, form the auxiliary air gap (6) of two different sizes, one of them auxiliary air gap is another 2 times, and the stator core on the load-bearing direction (3) magnetic pole varies in size.
2. permanent-magnett electromagnetic hybrid radial bearing according to claim 1 is characterized in that: described rotor core (1) and stator core (3) all adopt the folded vertically system of silicon steel plate to form.
3. permanent-magnett electromagnetic hybrid radial bearing according to claim 1 and 2 is characterized in that: the silicon steel plate sheet that described rotor core (1) and stator core (3) are adopted is thick to be 0.2mm, 0.35mm or 0.5mm.
4. permanent-magnett electromagnetic hybrid radial bearing according to claim 1 is characterized in that: the big end of stator core (3) width on the said load-bearing direction is 1.5～2 times of small end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100087529A CN102032270B (en) | 2011-01-17 | 2011-01-17 | Permanent magnetic and electromagnetic mixed radial bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100087529A CN102032270B (en) | 2011-01-17 | 2011-01-17 | Permanent magnetic and electromagnetic mixed radial bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102032270A CN102032270A (en) | 2011-04-27 |
| CN102032270B true CN102032270B (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100087529A Expired - Fee Related CN102032270B (en) | 2011-01-17 | 2011-01-17 | Permanent magnetic and electromagnetic mixed radial bearing |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3135933B1 (en) * | 2015-08-25 | 2019-05-01 | ReinHeart GmbH | Active magnetic 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 |
| CN106838005B (en) * | 2017-04-11 | 2019-02-05 | 华中科技大学 | A kind of heteropolarity permanent magnetic offset mixed radial magnetic bearing |
| CN106812797B (en) * | 2017-04-11 | 2019-01-22 | 华中科技大学 | A kind of double layered stator permanent magnet offset radial magnetic bearing |
| PL233992B1 (en) * | 2019-03-29 | 2019-12-31 | Politechnika Opolska | Radial magnetic bearing with permanent magnets |
| CN111628607B (en) * | 2020-04-26 | 2021-12-17 | 哈尔滨工业大学 | Circumferential block type radial hybrid support electromagnetic bearing system and control method |
| CN115095602A (en) * | 2022-07-21 | 2022-09-23 | 重庆开山流体机械有限公司 | Asymmetric electromagnetic bearing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005061578A (en) * | 2003-08-19 | 2005-03-10 | Iwaki Co Ltd | Magnetic bearing |
| CN101025200A (en) * | 2007-04-02 | 2007-08-29 | 北京航空航天大学 | Permanent magnet polarized external rotor radial magnetic bearing |
| JP4220859B2 (en) * | 2003-08-19 | 2009-02-04 | 株式会社イワキ | Magnetic bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1047348A (en) * | 1996-08-02 | 1998-02-17 | Yaskawa Electric Corp | Stator for radial magnetic bearing |
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2011
- 2011-01-17 CN CN2011100087529A patent/CN102032270B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005061578A (en) * | 2003-08-19 | 2005-03-10 | Iwaki Co Ltd | Magnetic bearing |
| JP4220859B2 (en) * | 2003-08-19 | 2009-02-04 | 株式会社イワキ | Magnetic bearing |
| CN101025200A (en) * | 2007-04-02 | 2007-08-29 | 北京航空航天大学 | Permanent magnet polarized external rotor radial magnetic bearing |
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| Publication number | Publication date |
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| CN102032270A (en) | 2011-04-27 |
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Granted publication date: 20120725 Termination date: 20130117 |