CN1995768A - PM offset external rotor radial magnetic bearing with redundant structure - Google Patents
PM offset external rotor radial magnetic bearing with redundant structure Download PDFInfo
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- CN1995768A CN1995768A CN 200710063271 CN200710063271A CN1995768A CN 1995768 A CN1995768 A CN 1995768A CN 200710063271 CN200710063271 CN 200710063271 CN 200710063271 A CN200710063271 A CN 200710063271A CN 1995768 A CN1995768 A CN 1995768A
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Abstract
The invention relates to an external rotor radial magnetic bearing biased with permanent magnets, which is provided with redundant structure, characterized in that it comprises stator and rotor, there is air gap between stator and rotor, the stator comprises stator core and excitation coil winded on it, the stator core has sixteen magnetic poles, which constitute left-right ends with eight pairs of magnetic poles, eight magnetic poles at the left end and eight magnetic poles at the right end are distributed on the circle direction evenly; the rotor comprises left (right) rotor core, left (right) external magnetic conductive ring and permanent magnet, left (right) external rotor magnetic conductive ring are set out of the left (right) rotor core, the permanent magnet is set between left and right magnetic conductive rings; two external rotor radial magnetic bearings of redundancy with each other are constituted by two groups of stator poles and rotors. The invention makes the structure of external rotor magnetic bearing realize redundant. When one magnetic bearing is failure, another magnetic bearing can work normally so as to decrease cubage, weight and power consumption of redundant magnetic bearing and 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 offset external rotor radial 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, require magnetic levitation bearing system to have redundancy and fault tolerance, and the radial direction magnetic bearing that has fault-tolerant architecture at present adopts the active magnetic bearings structure, 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, be easy to control and the permanent magnet offset external rotor radial magnetic bearing of high reliability.
Technical solution of the present invention is: a kind of permanent magnet offset external rotor radial magnetic bearing with redundancy structure, it is characterized in that: be air gap between stator and the rotor, stator is reached by stator core to be formed around field coil thereon, stator core has 16 magnetic poles, their form the 8 pairs of magnetic poles in two ends, the left and right sides, and 8 magnetic poles of left end and 8 magnetic poles of right-hand member evenly distribute along circumference; Rotor comprises the left rotor iron core, turn right sub outer magnetic guiding loop unshakable in one's determination, left, the outer magnetic guiding loop in the right side and permanent magnet, and the left rotor outside with the sub-iron core of turning right unshakable in one's determination is outer magnetic guiding loop in a left side and right outer magnetic guiding loop, is permanent magnet between the outer magnetic guiding loop of the left outer magnetic guiding loop and the right side; Non-conterminous 4 magnetic poles in stator core left side and non-conterminous 4 magnetic poles of right side 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 direction magnetic bearings altogether.
The principle of such scheme is: provide permanent magnet bias magnetic field by permanent magnet to magnetic bearing, the electromagnetic field that field coil produced plays regulating action, be used for changing every power of extremely descending magnetic field, keep the air gap between the magnetic bearing rotor even, and make rotor obtain contactless stable support.Stator of the present invention is by stator core and forming around field coil thereon, and stator core has 16 magnetic poles, their 8 pairs of magnetic poles in composition two ends, the left and right sides, and 8 magnetic poles of left end and 8 magnetic poles of right-hand member evenly distribute along circumference; Mutual non-conterminous 4 pairs of magnetic poles are formed two groups of magnetic pole of the stator respectively about in 8 pairs of magnetic poles, these two groups of magnetic pole of the stator and rotor are formed two redundant each other external rotor radial 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 postive direction magnetic circuit is example explanation magnetic circuit, 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, left side air gap, stator core magnetic pole, right side air gap, the unshakable in one's determination and right outer magnetic guiding loop of the son of turning right 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.Electromagnetic circuit is: the magnetic flux that produces with Y-axis postive direction solenoid current is an example, electromagnetism stimulated the menstrual flow stator core+Y direction left end magnetic pole of the stator ,+air gap of Y direction left end, left rotor iron core ,-magnetic pole of the stator of the air gap of Y direction left end, the magnetic pole of the stator of stator core-Y direction left end, stator core-Y direction right-hand member ,-air gap of Y direction right-hand member, the son of turning right be unshakable in one's determination ,+air gap of Y direction right-hand member and the magnetic pole of the stator of stator core+Y direction right-hand member constitute the closed-loop path, shown in the solid line among Fig. 2, Fig. 3 and Fig. 4.Whole device constitutes two external rotor radial 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, electromagnetic circuit is: the magnetic flux that produces with Y ' axle postive direction solenoid current is an example, the stimulated the menstrual flow magnetic pole of the stator of stator core+Y ' direction left end of electromagnetism, the air gap of+Y ' direction left end, the left rotor iron core, the air gap of-Y ' direction left end, the magnetic pole of the stator of stator core-Y ' direction left end, the magnetic pole of the stator of stator core-Y ' direction right-hand member, the air gap of-Y ' direction right-hand member, the son of turning right is unshakable in one's determination, the magnetic pole of the stator of the air gap of+Y ' direction right-hand member and stator core+Y ' direction right-hand member constitutes the closed-loop path, as Fig. 2, shown in the solid line among Fig. 5 and Fig. 6.When one of them radial direction magnetic bearing broke down, another standby radial direction magnetic bearing entered normal working, thereby had guaranteed the high reliability of magnetic bearing system.
The present invention's advantage compared with prior art is: the present invention utilize 8 pairs of magnetic pole of the stator and on field coil, constituted external rotor radial magnetic bearing with a left side (right side) outer magnetic guiding loop, permanent magnet, a left side (right side) rotor core with redundancy structure, have simple in structure, and when one of them radial hybrid 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 offset external rotor radial magnetic bearing of the present invention produces bias magnetic field by permanent magnet, can significantly reduce magnetic bearing power consumption, volume and weight 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 offset external rotor radial magnetic bearing sectional drawing with redundancy structure of the present invention;
Fig. 3 is the permanent magnet offset external rotor radial magnetic bearing left side sectional view with redundancy structure of the present invention;
Fig. 4 is the permanent magnet offset external rotor radial magnetic bearing right side sectional view with redundancy structure of the present invention;
Fig. 5 is the permanent magnet offset external rotor radial 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 offset external rotor radial 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, a kind of permanent magnet offset external rotor radial magnetic bearing with redundancy structure of the present invention is made up of stator and rotor.Be air gap 7 between stator and the rotor, stator is by stator core 8 and forms around field coil 4 thereon, and stator core 8 has 16 magnetic poles, their 8 pairs of magnetic poles in composition two ends, the left and right sides, and 8 magnetic poles of left end and 8 magnetic poles of right-hand member evenly distribute along circumference; Rotor comprises left rotor iron core 3, right-hand rotation iron core 5, the outer magnetic guiding loop 2 in a left side, right outer magnetic guiding loop 6 and permanent magnet 1, the outside of the left rotor unshakable in one's determination 3 and the son unshakable in one's determination 5 of turning right is outer magnetic guiding loop 2 in a left side and right outer magnetic guiding loop 6, is permanent magnet 1 between outer magnetic guiding loop 2 in a left side and the right outer magnetic guiding loop 6; Non-conterminous 4 magnetic poles 9,11,13,15 in stator core 8 left sides or as non-conterminous 4 magnetic poles 10,12,14,16 of redundancy and non-conterminous 4 magnetic poles 17,19,21,23 of right side stator core or as non-conterminous 4 magnetic poles 18,20,22,24 of redundancy 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 direction magnetic bearings altogether.
Used outer magnetic guiding loop 2 in a left side and the right outer magnetic guiding loop 6 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 rotor iron core 3, right-hand rotation unshakable in one's determination 5 and stator core 8 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 1 is good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and permanent magnet 1 is an annulus, magnetizes vertically.The good electromagnetic wire coiling final vacuum paint-dipping drying of field coil 4 usefulness conduction forms.
Claims (5)
1, a kind of permanent magnet offset external rotor radial magnetic bearing with redundancy structure, form by stator and rotor, it is characterized in that: be air gap (7) between stator and the rotor, stator is reached by stator core (8) to be formed around field coil (4) thereon, stator core (8) has 16 magnetic poles, their form the 8 pairs of magnetic poles in two ends, the left and right sides, and 8 magnetic poles of left end and 8 magnetic poles of right-hand member evenly distribute along circumference; Rotor comprises left rotor iron core (3), right-hand rotation (5) unshakable in one's determination, a left side outer magnetic guiding loop (2), right outer magnetic guiding loop (6) and permanent magnet (1), the outside of the left rotor iron core (3) and the son (5) unshakable in one's determination of turning right is a left side outer magnetic guiding loop (2) and right outer magnetic guiding loop (6), is permanent magnet (1) between a left side outer magnetic guiding loop (2) and the right outer magnetic guiding loop (6); Stator core (8) left side non-conterminous 4 magnetic poles (9), (11), (13), (15) or non-conterminous 4 magnetic poles of non-conterminous 4 magnetic poles (10), (12), (14), (16) and right side stator core (17), (19), (21), (23) or non-conterminous 4 magnetic poles (18), (20), (22), (24) and on field coil (4) form two groups of redundant each other magnetic pole of the stator respectively, whole device is formed two radial direction magnetic bearings of redundancy each other altogether.
2, the permanent magnet offset external rotor radial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (1) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
3, the permanent magnet offset external rotor radial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described permanent magnet (1) is an annulus, magnetizes vertically.
4, the permanent magnet offset external rotor radial magnetic bearing with redundancy structure according to claim 1 is characterized in that: magnetic guiding loop outside the described left side (2) and right outer magnetic guiding loop (6) all adopt the good material of magnetic property to make.
5, the permanent magnet offset external rotor radial magnetic bearing with redundancy structure according to claim 1 is characterized in that: described left rotor iron core (3), right-hand rotation (5) unshakable in one's determination and stator core (8) adopt the good soft magnetic material of magnetic property to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632711A CN100451362C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial magnetic bearing with redundant structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632711A CN100451362C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial magnetic bearing with redundant structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995768A true CN1995768A (en) | 2007-07-11 |
| CN100451362C CN100451362C (en) | 2009-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100632711A Expired - Fee Related CN100451362C (en) | 2007-01-05 | 2007-01-05 | PM offset external rotor radial magnetic bearing with redundant structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881302A (en) * | 2010-07-09 | 2010-11-10 | 北京奇峰聚能科技有限公司 | Two-air-gap outer rotor radial hybrid magnetic bearing with fault-tolerant function |
| CN101881303A (en) * | 2010-07-09 | 2010-11-10 | 北京奇峰聚能科技有限公司 | Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function |
| CN101994761A (en) * | 2010-08-17 | 2011-03-30 | 北京航空航天大学 | Double-permanent magnet outer-rotor permanent magnet biased radial magnetic bearing |
| CN103470631A (en) * | 2013-09-18 | 2013-12-25 | 北京航空航天大学 | Attraction type combined-magnet axial passive magnetic bearing |
| CN103470630A (en) * | 2013-09-18 | 2013-12-25 | 北京航空航天大学 | Repulsion type combined-magnet radial passive magnetic bearing |
| CN108953376A (en) * | 2018-06-26 | 2018-12-07 | 南京邮电大学 | A kind of semi-freedom mixed type axial magnetic bearing of permanent magnet on rotor |
| CN110748562A (en) * | 2019-09-17 | 2020-02-04 | 南京航空航天大学 | Surrounding permanent magnet biased axial-radial magnetic suspension bearing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232955A (en) * | 1995-02-27 | 1996-09-10 | Ebara Corp | Magnetic bearing |
| JP4195129B2 (en) * | 1998-09-18 | 2008-12-10 | 三菱電機株式会社 | Radial magnetic bearing device |
| 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 |
| 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 |
| CN1285840C (en) * | 2005-05-09 | 2006-11-22 | 北京航空航天大学 | Permanent magnetism biased radial magnetic bearing in external rotor |
| CN1314906C (en) * | 2005-08-08 | 2007-05-09 | 北京航空航天大学 | Permanent magnet biased external rotor radial magnetic bearing |
-
2007
- 2007-01-05 CN CNB2007100632711A patent/CN100451362C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881302A (en) * | 2010-07-09 | 2010-11-10 | 北京奇峰聚能科技有限公司 | Two-air-gap outer rotor radial hybrid magnetic bearing with fault-tolerant function |
| CN101881303A (en) * | 2010-07-09 | 2010-11-10 | 北京奇峰聚能科技有限公司 | Permanent magnet offsetting outer rotor radial magnetic bearing with fault-tolerant function |
| CN101994761A (en) * | 2010-08-17 | 2011-03-30 | 北京航空航天大学 | Double-permanent magnet outer-rotor permanent magnet biased radial magnetic bearing |
| CN103470631A (en) * | 2013-09-18 | 2013-12-25 | 北京航空航天大学 | Attraction type combined-magnet axial passive magnetic bearing |
| CN103470630A (en) * | 2013-09-18 | 2013-12-25 | 北京航空航天大学 | Repulsion type combined-magnet radial passive magnetic bearing |
| CN103470631B (en) * | 2013-09-18 | 2016-06-22 | 北京航空航天大学 | A kind of axial passive magnetic bearing of attractive combination magnet |
| CN103470630B (en) * | 2013-09-18 | 2016-06-22 | 北京航空航天大学 | A kind of repulsion type combination magnet radially passive magnetic bearing |
| CN108953376A (en) * | 2018-06-26 | 2018-12-07 | 南京邮电大学 | A kind of semi-freedom mixed type axial magnetic bearing of permanent magnet on rotor |
| CN110748562A (en) * | 2019-09-17 | 2020-02-04 | 南京航空航天大学 | Surrounding permanent magnet biased axial-radial magnetic suspension bearing |
Also Published As
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|---|---|
| CN100451362C (en) | 2009-01-14 |
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Granted publication date: 20090114 Termination date: 20190105 |