CN100451363C - 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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- CN100451363C CN100451363C CNB2007100632726A CN200710063272A CN100451363C CN 100451363 C CN100451363 C CN 100451363C CN B2007100632726 A CNB2007100632726 A CN B2007100632726A CN 200710063272 A CN200710063272 A CN 200710063272A CN 100451363 C CN100451363 C CN 100451363C
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- permanent magnet
- guiding loop
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Abstract
The invention relates to an external rotor radial mixing magnetic bearing biased with permanent magnets, which is provided with redundant structure, comprising left-right external magnetic conductive rings, permanent magnet, left-right rotor cores, left-right stator cores, excitation coil and internal magnetic conductive ring. Left (right) stator core and internal magnetic conductive ring are set in left (right) rotor core in turn. The internal magnetic ring is connected with left-right stator cores. There is air gap between inner face of rotor core and outer face of stator core. Left-right stator cores constitute sixteen magnetic poles and excitation coil is winded on each magnetic pole. They are connected by internal magnetic conductive ring. 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 external rotor radial mixing magnetic bearing realize redundant. When one radial mixing magnetic bearing is failure, another can work normally 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 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), 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 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 |
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CNB2007100632726A CN100451363C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial mixed magnetic bearing with redundant structure |
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CNB2007100632726A CN100451363C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial mixed magnetic bearing with redundant structure |
Publications (2)
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CN1995769A CN1995769A (en) | 2007-07-11 |
CN100451363C true CN100451363C (en) | 2009-01-14 |
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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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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101907131B (en) * | 2010-07-09 | 2012-05-16 | 北京奇峰聚能科技有限公司 | Permanent magnet-biased inner rotor radial magnetic bearing with fault tolerance function |
CN101886669B (en) * | 2010-07-09 | 2012-05-16 | 北京奇峰聚能科技有限公司 | Permanent-magnetic bias outer rotor 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 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08232955A (en) * | 1995-02-27 | 1996-09-10 | Ebara Corp | Magnetic bearing |
US6563244B1 (en) * | 1999-07-28 | 2003-05-13 | Seiko Instruments Inc. | 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 |
CN1644940A (en) * | 2005-01-27 | 2005-07-27 | 北京航空航天大学 | Low-consumption permanent-magnet offset external rotor radial magnetic bearing |
CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 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
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08232955A (en) * | 1995-02-27 | 1996-09-10 | Ebara Corp | Magnetic bearing |
US6563244B1 (en) * | 1999-07-28 | 2003-05-13 | Seiko Instruments Inc. | 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 |
CN1644940A (en) * | 2005-01-27 | 2005-07-27 | 北京航空航天大学 | Low-consumption permanent-magnet offset external rotor radial magnetic bearing |
CN1752471A (en) * | 2005-11-10 | 2006-03-29 | 北京航空航天大学 | Low watt consumption permanent magnet offset external rotor hybrid radial magnetic bearing |
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CN1995769A (en) | 2007-07-11 |
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