CN1995769A - PM offset external rotor radial mixed magnetic bearing with redundant structure - Google Patents
PM offset external rotor radial mixed magnetic bearing with redundant structure Download PDFInfo
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- CN1995769A CN1995769A CN 200710063272 CN200710063272A CN1995769A CN 1995769 A CN1995769 A CN 1995769A CN 200710063272 CN200710063272 CN 200710063272 CN 200710063272 A CN200710063272 A CN 200710063272A CN 1995769 A CN1995769 A CN 1995769A
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Abstract
一种具有冗余结构的永磁偏置外转子径向混合磁轴承，由左、右外导磁环，永磁体，左、右转子铁心，左、右定子铁心，激磁线圈和内导磁环组成。左(右)转子铁心内部依次是左(右)定子铁心和内导磁环，内导磁环与左、右定子铁心相连，转子铁心内表面与定子铁心外表面之间形成空气隙。左、右定子铁心组成16个磁极，每个磁极上绕有激磁线圈，它们之间通过内导磁环连接，永磁体位于左、右外导磁环之间，左定子铁心不相邻的4个磁极右定子铁心不相邻的4个磁极及其上的激磁线圈分别组成两组互为冗余的定子磁极，整个装置共组成两个互为冗余的径向混合磁轴承。本发明在永磁偏置外转子径向混合磁轴承的结构上实现了冗余，当一个径向混合磁轴承出现故障时，另一个仍可正常工作，从而显著提高了磁轴承系统的可靠性。
A radial hybrid magnetic bearing with permanent magnet bias outer rotor with redundant structure, consisting of left and right outer magnetic conduction rings, permanent magnets, left and right rotor cores, left and right stator cores, excitation coils and inner magnetic conduction ring composition. Inside the left (right) rotor core are the left (right) stator core and the inner magnetic ring, the inner magnetic ring is connected with the left and right stator cores, and an air gap is formed between the inner surface of the rotor core and the outer surface of the stator core. The left and right stator cores form 16 magnetic poles, each magnetic pole is wound with an excitation coil, and they are connected by an inner magnetic conduction ring. The permanent magnet is located between the left and right outer magnetic conduction rings. The four non-adjacent magnetic poles of the right stator core and the excitation coils on them respectively form two sets of mutually redundant stator magnetic poles, and the whole device consists of two mutually redundant radial hybrid magnetic bearings. The present invention realizes redundancy in the structure of the radial hybrid magnetic bearing of the permanent magnet bias outer rotor, and when one radial hybrid magnetic bearing fails, the other can still work normally, thereby significantly improving the reliability of the magnetic bearing system .
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure can be used as the contactless supporting part of rotary component in the systems such as magnetically levitated flywheel, magnetic suspension control torque gyroscope, aeroengine, vacuum molecular pump, high-speed machine tool and satellite.
Background technique
Magnetic suspension bearing is according to the magnetic force presentation mode, can be divided into the passive magnetic suspension bearing and (provide magnetic force by permanent magnet, also claim passive magnetic suspension bearing), active magnetic bearing (provide magnetic force by electromagnet, also claim active magnetic bearings) and hybrid magnetic suspension bearing (providing magnetic force) by permanent magnet and electromagnet.Because the stable region of passive magnetic suspension bearing is very little, and the hybrid magnetic bearing of permanent magnet bias utilizes permanent magnet to replace the quiescent biasing magnetic field that is produced by field current in the active magnetic bearings, has the loss of the power amplifier of reduction, reduce the electromagnet Number of ampere turns, dwindle the advantages such as volume and weight of magnetic bearing, so the hybrid magnetic suspension bearing of permanent magnet bias has obtained using widely.In aeroengine, astrovehicles etc. require the field of high reliability, for improving the reliability of magnetic levitation bearing system, requirement has redundancy and fault tolerance, and the radial direction magnetic bearing that has redundancy structure at present is an active magnetic bearings, its structural representation as shown in Figure 1,6 coils have been used on the radial magnetic bearing of redundancy structure having, wherein per 3 non-conterminous magnetic poles and coil are formed a radial magnetic bearing, in fact this radial magnetic bearing with redundancy structure is equivalent to have two radial magnetic bearings simultaneously in work, when some bearings broke down, another bearing can proper functioning.The radial direction magnetic bearing of this structure produces quiescent biasing magnetic field by electric current, has shortcomings such as power consumption, quality and volume are big.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of power consumption with redundancy structure little, simple in structure, be easy to control and the permanent magnet bias outer rotor radial mixed magnetic bearing of high reliability.
Technical solution of the present invention is: have the permanent magnet bias outer rotor radial mixed magnetic bearing of redundancy structure, it is characterized in that: be made up of magnetic guiding loop, right outer magnetic guiding loop, permanent magnet, left rotor iron core, the sub-iron core of turning right, left stator core, right stator core, field coil and interior magnetic guiding loop outside the left side.The left rotor iron core and the sub inside unshakable in one's determination of turning right are respectively left stator core and right stator core, left side stator core and right stator core inside are interior magnetic guiding loops, interior magnetic guiding loop links to each other with right stator core with left stator core, and left stator core and right stator core outer surface and left rotor are unshakable in one's determination and turn right and form air gap between the sub internal surface unshakable in one's determination.Unshakable in one's determination and the son of turning right of left rotor unshakable in one's determination with respectively with a left side outside magnetic guiding loop be connected with the outer magnetic guiding loop in the right side, permanent magnet is outside a left side outside magnetic guiding loop and the right side between the magnetic guiding loop.16 magnetic poles are formed in left side stator core and right stator core altogether, 8 magnetic poles of left side stator core and 8 magnetic poles of right stator core evenly distribute along circumference, be wound with field coil on each magnetic pole, a left side non-conterminous 4 magnetic poles of stator core and non-conterminous 4 magnetic poles of right stator core and on field coil form two groups of redundant each other magnetic pole of the stator respectively, whole device is formed two redundant each other radial hybrid magnetic bearings altogether.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, and the electromagnetic field that field coil produced plays regulating action, is used for changing every power of extremely descending magnetic field, keeps magnetic bearing rotor air gap even, and makes rotor obtain contactless support.16 magnetic poles are formed in left stator core of the present invention and right stator core, 8 magnetic poles of left side stator core and 8 magnetic poles of right stator core evenly distribute along circumference, be wound with field coil on each magnetic pole, a left side non-conterminous 4 magnetic poles of stator core and non-conterminous 4 magnetic poles of right stator core and on field coil form two groups of redundant each other magnetic pole of the stator respectively, whole device is formed two redundant each other radial hybrid magnetic bearings altogether.When one of them radial direction magnetic bearing proper functioning, the obstructed excess current of the field coil of another radial direction magnetic bearing is as standby magnetic bearing.With Y-axis forward magnetic circuit is example, permanent magnetic circuit is: magnetic flux is from the permanent magnet N utmost point, get back to the permanent magnet S utmost point by magnetic guiding loop, left rotor iron core, air gap, left stator core, interior magnetic guiding loop, right stator core, air gap, the unshakable in one's determination and right outer magnetic guiding loop of right-hand rotation outside the left side, constitute the permanent magnetic circuit of magnetic suspension bearing, in air gap, produce permanent magnet bias magnetic field, shown in the dotted line among Fig. 2.The electromagnetism main magnetic circuit has two-way, wherein one the tunnel is: the magnetic pole of the stator of left stator core+Y direction ,+air gap of Y direction, left rotor iron core ,-magnetic pole of the stator of Y direction air gap and left stator core-Y direction constitutes the closed-loop path, shown in the solid line among Fig. 2 and Fig. 3.Another road is: the magnetic pole of the stator of the sub-iron core+Y direction of turning right ,+air gap of Y direction, the son of turning right be unshakable in one's determination ,-magnetic pole of the stator of Y direction air gap and right stator core-Y direction constitutes the closed-loop path, shown in the solid line among Fig. 2 and Fig. 4.Whole device constitutes two radial direction magnetic bearings altogether, the permanent magnetic circuit of standby radial direction magnetic bearing is identical with the permanent magnetic circuit of proper functioning radial direction magnetic bearing, and electromagnetic circuit also is divided into two-way, with Y ' axle electromagnetism main magnetic circuit is example, wherein one the tunnel is: the magnetic pole of the stator of left stator core and+Y ' direction ,+air gap of Y ' direction, left rotor iron core ,-magnetic pole of the stator of Y ' direction air gap and left stator core-Y ' direction constitutes the closed-loop path, shown in the solid line among Fig. 2 and Fig. 5.Another road is: the magnetic pole of the stator of right stator core+Y ' direction ,+air gap of Y ' direction, the son of turning right be unshakable in one's determination ,-magnetic pole of the stator of Y ' direction air gap and right stator core-Y ' direction constitutes the closed-loop path, shown in the solid line among Fig. 2 and Fig. 6.When one of them radial direction magnetic bearing broke down, another standby radial direction magnetic bearing entered normal working.
The present invention's advantage compared with prior art is: the present invention utilize two stator cores in a left side (right side) 16 magnetic poles and on field coil, constituted radial hybrid magnetic bearing with a left side (right side) outer magnetic guiding loop, permanent magnet, a left side (right side) rotor core and interior magnetic guiding loop with redundancy structure, have simple in structure, and when one of them radial direction magnetic bearing breaks down, another standby radial direction magnetic bearing can enter normal working, thereby has guaranteed the safe and reliable operation of whole system.
Another advantage of the present invention is: permanent magnet bias inner rotor radial mixed magnetic bearing of the present invention produces bias magnetic field by permanent magnet, can significantly reduce magnetic bearing power consumption and volume with redundancy structure.
Description of drawings
Fig. 1 is for having the radially active magnetic bearings structural representation of fault-tolerant architecture in the prior art;
Fig. 2 is the permanent magnet bias outer rotor radial mixed magnetic bearing sectional drawing with redundancy structure of the present invention;
Fig. 3 is the permanent magnet bias outer rotor radial mixed magnetic bearing left side sectional view with redundancy structure of the present invention;
Fig. 4 is the permanent magnet bias outer rotor radial mixed magnetic bearing right side sectional view with redundancy structure of the present invention;
Fig. 5 is the permanent magnet bias outer rotor radial mixed magnetic bearing left side standby radial direction magnetic bearing electromagnetic circuit schematic representation with redundancy structure of the present invention;
Fig. 6 is the permanent magnet bias outer rotor radial mixed magnetic bearing right side standby radial direction magnetic bearing electromagnetic circuit schematic representation with redundancy structure of the present invention.
Embodiment
As Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, the permanent magnet bias outer rotor radial mixed magnetic bearing that has redundancy structure for the present invention, be citation form of the present invention, it is made up of left magnetic guiding loop 5, right outer magnetic guiding loop 6, permanent magnet 9, left rotor iron core 3, the son iron core 7 of turning right, left stator core 2 (comprising 8 magnetic pole of the stator), right stator core 8 (comprising 8 magnetic pole of the stator), 16 field coils 4, interior magnetic guiding loop 1, air gaps 10.The left rotor unshakable in one's determination 3 and son 7 inner radial unshakable in one's determination of turning right are respectively left stator core 2 and right stator core 8, left side stator core 2 and right stator core 8 inner radial are interior magnetic guiding loops 1, interior magnetic guiding loop 1 links to each other with right stator core 8 with left stator core 2, the left rotor unshakable in one's determination 3 and the formation air gap 10 between son 7 internal surfaces unshakable in one's determination and left stator core 2 and right stator core 8 outer surfaces of turning right, the outside of left rotor unshakable in one's determination 3 and right external rotor iron core 7 links to each other with outer magnetic guiding loop 5 in a left side and right outer magnetic guiding loop 6 respectively, permanent magnet 9 outside a left side outside magnetic guiding loop 5 and the right side magnetic guiding loop 6 axial between.16 magnetic poles are formed in left side stator core 2 and right stator core 8,8 magnetic poles of left side stator core and 8 magnetic poles of right stator core evenly distribute along circumference, be wound with field coil 4 on each magnetic pole, connect by interior magnetic guiding loop 1 between them, left side stator core 2 non-conterminous 4 magnetic poles 11,13,15,17 or as redundant non-conterminous 4 magnetic poles 12,14,16,18 and right stator core 8 non-conterminous 4 magnetic poles 19,21,23,25 or as redundant non-conterminous 4 magnetic poles 20,22,24,26 and on field coil 4 form two groups of redundant each other magnetic pole of the stator respectively, whole device is formed two redundant each other radial hybrid magnetic bearings altogether.
The used outer magnetic guiding loop 5 in a left side, right outer magnetic guiding loop 6 and the interior magnetic guiding loop 1 of the invention described above all made with the good material of magnetic property, as magnetic materials such as electrical pure iron, various low carbon steel, 1J50 and 1J79.Left side stator core 3, right stator core 7 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 and the 1J79 system of changing.The material of permanent magnet 9 is good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and permanent magnet 9 is an annulus, magnetizes vertically.Paint-dipping drying forms after the good electromagnetic wire coiling of field coil 4 usefulness conductions.
Claims (5)
1, a kind of permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure, it is characterized in that: by magnetic guiding loop outside the left side (5), right outer magnetic guiding loop (6), permanent magnet (9), left rotor iron core (3), turn right sub (7) unshakable in one's determination, left side stator core (2), right stator core (8), field coil (4) and interior magnetic guiding loop (1) are formed, left rotor iron core (3) and the son of turning right (7) inside unshakable in one's determination are respectively left stator core (2) and right stator core (8), left side stator core (2) and right stator core (8) inside are interior magnetic guiding loop (1), interior magnetic guiding loop (1) links to each other with right stator core (8) with left stator core (2), form air gap (10) between left side stator core (2) and right stator core (8) outer surface and left rotor iron core (3) and the son of turning right (7) internal surface unshakable in one's determination, 16 magnetic poles are formed in left side stator core (2) and right stator core (8), 8 magnetic poles of left side stator core (2) and 8 magnetic poles of right stator core (8) evenly distribute along circumference, be wound with field coil (4) on each magnetic pole, permanent magnet (9) is positioned between a left side outer magnetic guiding loop (5) and the right outer magnetic guiding loop (6), left side stator core (2) non-conterminous 4 magnetic poles (11), (13), (15), (17) or non-conterminous 4 magnetic poles (12), (14), (16), (18) and non-conterminous 4 magnetic poles of right stator core (8) (19), (21), (23), (25) or non-conterminous 4 magnetic poles (20), (22), (24), (26) and on field coil (4) form two groups of redundant each other magnetic pole of the stator respectively, whole device is formed two redundant each other radial hybrid magnetic bearings altogether.
2, the permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (9) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
3, the permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (9) is an annulus, magnetizes vertically.
4, the permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: magnetic guiding loop outside the described left side (5), right outer magnetic guiding loop (6), interior magnetic guiding loop (1) all adopt the good material of magnetic property to make.
5, the permanent magnet bias outer rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: described left rotor iron core (3), the son of turning right (7), left stator core (2) unshakable in one's determination, right stator core (8) adopt the good soft magnetic material of magnetic property to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632726A CN100451363C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial mixed magnetic bearing with redundant structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632726A CN100451363C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial mixed magnetic bearing with redundant structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995769A true CN1995769A (en) | 2007-07-11 |
| CN100451363C CN100451363C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100632726A Expired - Fee Related CN100451363C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial mixed magnetic bearing with redundant structure |
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| CN (1) | CN100451363C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886669A (en) * | 2010-07-09 | 2010-11-17 | 北京奇峰聚能科技有限公司 | Permanent-magnetic bias outer rotor radial magnetic bearing |
| CN101907131A (en) * | 2010-07-09 | 2010-12-08 | 北京奇峰聚能科技有限公司 | Permanent magnet-biased inner rotor radial magnetic bearing with fault tolerance function |
| CN106337876A (en) * | 2016-10-13 | 2017-01-18 | 中国人民解放军海军工程大学 | Heterospolar type permanent magnet bias mixed radial magnetic bearing |
| CN112212847A (en) * | 2020-08-25 | 2021-01-12 | 西安航天精密机电研究所 | Combined sensor for two floating gyroscopes |
| CN115654012A (en) * | 2022-10-14 | 2023-01-31 | 珠海格力电器股份有限公司 | Magnetic suspension active three-degree-of-freedom bearing, motor and compressor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232955A (en) * | 1995-02-27 | 1996-09-10 | Ebara Corp | Magnetic bearing |
| JP2001041238A (en) * | 1999-07-28 | 2001-02-13 | Seiko Seiki Co Ltd | Composite type electromagnet and radial magnetic bearing |
| US6794780B2 (en) * | 1999-12-27 | 2004-09-21 | Lust Antriebstechnik Gmbh | Magnetic bearing system |
| JP2005061578A (en) * | 2003-08-19 | 2005-03-10 | Iwaki Co Ltd | Magnetic bearing |
| CN1293319C (en) * | 2005-01-27 | 2007-01-03 | 北京航空航天大学 | Low-consumption permanent-magnet offset external rotor radial magnetic bearing |
| CN1307375C (en) * | 2005-11-10 | 2007-03-28 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
-
2007
- 2007-01-05 CN CNB2007100632726A patent/CN100451363C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886669A (en) * | 2010-07-09 | 2010-11-17 | 北京奇峰聚能科技有限公司 | Permanent-magnetic bias outer rotor radial magnetic bearing |
| CN101907131A (en) * | 2010-07-09 | 2010-12-08 | 北京奇峰聚能科技有限公司 | Permanent magnet-biased inner rotor radial magnetic bearing with fault tolerance function |
| CN106337876A (en) * | 2016-10-13 | 2017-01-18 | 中国人民解放军海军工程大学 | Heterospolar type permanent magnet bias mixed radial magnetic bearing |
| CN106337876B (en) * | 2016-10-13 | 2018-10-16 | 中国人民解放军海军工程大学 | Heteropolar formula permanent magnetic offset mixed radial magnetic bearing |
| CN112212847A (en) * | 2020-08-25 | 2021-01-12 | 西安航天精密机电研究所 | Combined sensor for two floating gyroscopes |
| CN115654012A (en) * | 2022-10-14 | 2023-01-31 | 珠海格力电器股份有限公司 | Magnetic suspension active three-degree-of-freedom bearing, motor and compressor |
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| Publication number | Publication date |
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| CN100451363C (en) | 2009-01-14 |
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