CN100451364C - PM offset inner rotor radial mixed magnetic bearing with redundant structure - Google Patents
PM offset inner rotor radial mixed magnetic bearing with redundant structure Download PDFInfo
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- CN100451364C CN100451364C CNB2007100632730A CN200710063273A CN100451364C CN 100451364 C CN100451364 C CN 100451364C CN B2007100632730 A CNB2007100632730 A CN B2007100632730A CN 200710063273 A CN200710063273 A CN 200710063273A CN 100451364 C CN100451364 C CN 100451364C
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Abstract
The invention relates to an internal rotor radial mixing magnetic bearing biased with permanent magnets, which is provided with redundant structure, comprising external magnetic conductive rings, permanent magnet, left (right) rotor cores, left (right) stator cores, excitation coil and left (right) internal magnetic conductive ring. The external magnetic conductive ring is connected with left and right stator cores. Left (right) rotor core and left (right) internal magnetic conductive ring are set in left (right) stator core in turn. Left (right) internal magnetic ring is connected with left (right) rotor cores. There is air gap between outer face of left (right) rotor core and inner face of left (right) stator core. Left and right stator cores constitute sixteen magnetic poles. Eight magnetic poles of left stator core and eight magnetic poles of right stator core are distributed on the circle direction evenly and excitation coil is winded on each magnetic pole. The permanent magnet is set between left and right external magnetic conductive rings. Two groups of stator poles of redundancy with each other are constituted by not-adjacent four magnetic poles of left stator core, not-adjacent four magnetic poles of right stator core and the excitation coil on them. In the whole device two radial mixing magnetic bearings of redundancy with each other are constituted. The invention makes the structure of internal rotor radial mixing magnetic bearing realize redundant so as to improve the stability of magnetic bearing system obviously.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of permanent magnet bias inner 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, vacuum molecular pump, high-speed machine tool, aeroengine and astrovehicle.
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 inner rotor radial mixed magnetic bearing of high reliability.
Technical solution of the present invention is: have the permanent magnet bias inner rotor radial mixed magnetic bearing of redundancy structure, it is characterized in that: be made up of outer magnetic guiding loop, permanent magnet, a left side (right side) rotor core, a left side (right side) stator core, field coil, the interior magnetic guiding loop in a left side (right side).Outer magnetic guiding loop links to each other with right stator core with left stator core, a left side (right side) stator core inner radial is a left side (right side) rotor core and the interior magnetic guiding loop in a left side (right side) successively, a left side (right side) interior magnetic guiding loop links to each other with a left side (right side) rotor core, forms air gap between a left side (right side) rotor core outer surface and a left side (right side) the stator core internal surface.16 magnetic poles are formed in left 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, permanent magnet is in left and right between the magnetic guiding loop, non-conterminous 4 magnetic poles of left and 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 the Y-axis 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 in magnetic guiding loop, the son iron core of turning right, right side air gap, right stator core, outer magnetic guiding loop, left stator core, left side air gap, left rotor iron core and the left side in right, 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 right stator core-Y direction ,-Y direction air gap, the son of turning right be unshakable in one's determination ,+air gap of Y direction and the magnetic pole of the stator of right stator core+Y direction constitute 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+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 ,-Y ' direction air gap, the son of turning right be unshakable in one's determination ,+air gap of Y ' direction and the magnetic pole of the stator of right stator core+Y ' direction constitute 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 inner rotor radial mixed magnetic bearing with outer magnetic guiding loop, permanent magnet, the interior magnetic guiding loop of a left side (right side) rotor core and a left side (right side) with redundancy structure, has advantage of simple 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 inner rotor radial mixed magnetic bearing sectional drawing with redundancy structure of the present invention;
Fig. 3 is the permanent magnet bias inner rotor radial mixed magnetic bearing left side sectional view with redundancy structure of the present invention;
Fig. 4 is the permanent magnet bias inner rotor radial mixed magnetic bearing right side sectional view with redundancy structure of the present invention;
Fig. 5 is the permanent magnet bias inner 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 inner 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, be the permanent magnet bias inner rotor radial mixed magnetic bearing with redundancy structure of the technology of the present invention solution, it is made up of outer magnetic guiding loop 5, permanent magnet 9, left rotor iron core 2, the sub-iron core 8 of turning right, left stator core 3 (comprising 8 magnetic pole of the stator), right stator core 7 (comprising 8 magnetic pole of the stator), 16 field coils 4, the interior magnetic guiding loop 1 in a left side, right interior magnetic guiding loop 11, air gaps 10.Outer magnetic guiding loop 5 links to each other with right stator core 7 with left stator core 3, left side stator core 3 and right stator core 7 inner radial are respectively the left rotor unshakable in one's determination 2 and the son unshakable in one's determination 8 of turning right, the left rotor unshakable in one's determination 2 and sub 8 inner radial unshakable in one's determination of turning right are magnetic guiding loop 1 and right interior magnetic guiding loops 11 in the left side, magnetic guiding loop 1, right interior magnetic guiding loop 11 link to each other with the son unshakable in one's determination 8 of turning right with left rotor iron core 2 in the left side, form air gap 10 between left rotor iron core 2 and right-hand rotation son 8 outer surfaces unshakable in one's determination and left stator core 3 and right stator core 7 internal surfaces.16 magnetic poles are formed in left side stator core 3 and right stator core 7,8 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, permanent magnet 9 is in a left side in magnetic guiding loop 1 and the right side between the magnetic guiding loop 11, left side stator core 3 non-conterminous 4 magnetic poles 12,14,16,18 or as redundant non-conterminous 4 magnetic poles 13,15,17,19 and right stator core 7 non-conterminous 4 magnetic poles 20,22,24,26 or as redundant non-conterminous 4 magnetic poles 21,23,25,27 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.
Interior magnetic guiding loop 1 in outer magnetic guiding loop 5, a left side and right interior magnetic guiding loop 11 that the invention described above is used are 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 rotor iron core 2, the son iron core 8 of turning right, left 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 inner rotor radial mixed magnetic bearing with redundancy structure is characterized in that: be made up of magnetic guiding loop (1), right interior magnetic guiding loop (11) and air gap (10) in outer magnetic guiding loop (5), permanent magnet (9), left rotor iron core (2), turn right sub (8), left stator core (3) unshakable in one's determination, right stator core (7), field coil (4), the left side; Outer magnetic guiding loop (5) links to each other with right stator core (7) with left stator core (3), left side stator core (3) and right stator core (7) inner radial are respectively the left rotor iron core (2) and the son (8) unshakable in one's determination of turning right, the left rotor iron core (2) and sub (8) inner radial unshakable in one's determination of turning right are magnetic guiding loop (1) and right interior magnetic guiding loops (11) in the left side, magnetic guiding loop (1) in the left side, magnetic guiding loop (11) links to each other with the son (8) unshakable in one's determination of turning right with left rotor iron core (2) in right, forms air gap (10) between the outer surface of the left rotor iron core (2) and the son (8) unshakable in one's determination of turning right and the internal surface of left stator core (3) and right stator core (7); 16 magnetic poles are formed in left side stator core (3) and right stator core (7), 8 magnetic poles of left side stator core (3) and 8 magnetic poles of right stator core (7) evenly distribute along circumference, be wound with field coil (4) on each magnetic pole, permanent magnet (9) is positioned between left side magnetic guiding loop (1) and the right magnetic guiding loop (11), 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 (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 inner 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 inner 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 inner rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: magnetic guiding loop (1) and right interior magnetic guiding loop (11) all adopt the good material of magnetic property to make in described outer magnetic guiding loop (5), the left side.
5, the permanent magnet bias inner rotor radial mixed magnetic bearing with redundancy structure according to claim 1 is characterized in that: described left rotor iron core (2), turn right son (8) unshakable in one's determination, left stator core (3) and right stator core (7) adopt the good soft magnetic material of magnetic property to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632730A CN100451364C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial mixed magnetic bearing with redundant structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632730A CN100451364C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial mixed magnetic bearing with redundant structure |
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| Publication Number | Publication Date |
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| CN1995770A CN1995770A (en) | 2007-07-11 |
| CN100451364C true CN100451364C (en) | 2009-01-14 |
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| CNB2007100632730A Expired - Fee Related CN100451364C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial mixed magnetic bearing with redundant structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451361C (en) * | 2007-01-05 | 2009-01-14 | 北京航空航天大学 | PM offset inner rotor radial magnetic bearing with redundant structure |
| CN101515744B (en) * | 2008-02-21 | 2011-03-23 | 高强 | Alternate current synchronous generator |
| CN101985956B (en) * | 2010-10-26 | 2013-03-06 | 中国人民解放军国防科学技术大学 | Flat type vertical coil inner rotor hybrid magnetic bearing |
| CN107256042A (en) * | 2017-05-08 | 2017-10-17 | 中国船舶重工集团公司第七〇七研究所 | A kind of miniaturization angular-sensitive and control device that inertia type instrument is floated applied to liquid |
| CN109681527B (en) * | 2019-01-14 | 2020-05-19 | 南京航空航天大学 | Radial magnetic suspension bearing control method with redundancy function |
| CN111022499B (en) * | 2019-12-31 | 2023-09-29 | 淮阴工学院 | Radial large bearing capacity hybrid magnetic bearing |
| CN112664561B (en) * | 2020-12-11 | 2022-07-12 | 庆安集团有限公司 | Dual-redundancy coil driving magnetic bearing for aircraft |
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| JP2001041238A (en) * | 1999-07-28 | 2001-02-13 | Seiko Seiki Co Ltd | Composite type electromagnet and radial magnetic bearing |
| JP2001146917A (en) * | 1999-11-24 | 2001-05-29 | Meidensha Corp | Thrust magnetic bearing using both of electromagnet and permanent magnet |
| US6794780B2 (en) * | 1999-12-27 | 2004-09-21 | Lust Antriebstechnik Gmbh | Magnetic bearing system |
| CN1648478A (en) * | 2005-01-27 | 2005-08-03 | 北京航空航天大学 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
| CN1667286A (en) * | 2005-04-06 | 2005-09-14 | 北京航空航天大学 | Permanent magnet biased inner rotor radial magnetic bearing |
| CN1707127A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Low-power consumption permanent magnetic offset mixed radial magnetic bearing |
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2007
- 2007-01-05 CN CNB2007100632730A patent/CN100451364C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041238A (en) * | 1999-07-28 | 2001-02-13 | Seiko Seiki Co Ltd | Composite type electromagnet and radial magnetic bearing |
| JP2001146917A (en) * | 1999-11-24 | 2001-05-29 | Meidensha Corp | Thrust magnetic bearing using both of electromagnet and permanent magnet |
| US6794780B2 (en) * | 1999-12-27 | 2004-09-21 | Lust Antriebstechnik Gmbh | Magnetic bearing system |
| CN1707127A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | Low-power consumption permanent magnetic offset mixed radial magnetic bearing |
| CN1648478A (en) * | 2005-01-27 | 2005-08-03 | 北京航空航天大学 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
| CN1667286A (en) * | 2005-04-06 | 2005-09-14 | 北京航空航天大学 | Permanent magnet biased inner rotor radial magnetic bearing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN1995770A (en) | 2007-07-11 |
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