CN100451361C - PM offset inner rotor radial magnetic bearing with redundant structure - Google Patents
PM offset inner rotor radial magnetic bearing with redundant structure Download PDFInfo
- Publication number
- CN100451361C CN100451361C CNB2007100632707A CN200710063270A CN100451361C CN 100451361 C CN100451361 C CN 100451361C CN B2007100632707 A CNB2007100632707 A CN B2007100632707A CN 200710063270 A CN200710063270 A CN 200710063270A CN 100451361 C CN100451361 C CN 100451361C
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- magnetic
- stator
- permanent magnet
- rotor
- bearing
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 239000000696 magnetic material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 230000005284 excitation Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 9
- 230000004907 flux Effects 0.000 description 5
- 238000005339 levitation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
一种具有冗余结构的永磁偏置内转子径向磁轴承，其特征在于：由定子和转子组成，定子和转子之间为气隙，定子由定子铁心及绕在其上的激磁线圈组成，定子铁心共有16个磁极，它们组成左右两端8对磁极，左端的8个磁极和右端的8个磁极沿圆周均匀分布；转子包括左(右)转子铁心、左(右)内导磁环和永磁体，左(右)转子铁心的内部是左(右)内导磁环，左、右内导磁环之间为永磁体，两组定子磁极和转子共组成两个互为冗余的内转子径向磁轴承。本发明使内转子径向磁轴承的结构上实现了冗余，当一个磁轴承发生故障时，另一个磁轴承可正常工作，从而降低了冗余磁轴承体积、重量和功耗，并显著提高了磁轴承系统的可靠性。
A permanent magnet bias inner rotor radial magnetic bearing with a redundant structure, characterized in that it consists of a stator and a rotor, an air gap exists between the stator and the rotor, and the stator consists of a stator core and an excitation coil wound on it , the stator core has a total of 16 magnetic poles, which form 8 pairs of magnetic poles at the left and right ends, and the 8 magnetic poles at the left end and the 8 magnetic poles at the right end are evenly distributed along the circumference; the rotor includes a left (right) rotor core, a left (right) inner magnetic ring and permanent magnets, the inside of the left (right) rotor core is the left (right) inner magnetic ring, and the permanent magnet is between the left and right inner magnetic rings. The two sets of stator poles and the rotor form two mutually redundant Inner rotor radial magnetic bearings. The invention realizes redundancy in the structure of the radial magnetic bearing of the inner rotor, and when one magnetic bearing fails, the other magnetic bearing can work normally, thereby reducing the volume, weight and power consumption of the redundant magnetic bearing, and significantly improving The reliability of the magnetic bearing system is improved.
Description
Technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of permanent magnet biased internal 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 biased internal rotor radial magnetic bearing of high reliability.
Technical solution of the present invention is: a kind of permanent magnet biased internal rotor radial magnetic bearing with redundancy structure, it is characterized in that: form by stator and rotor, it between stator and the rotor air gap, 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 interior magnetic guiding loop unshakable in one's determination, left, right interior magnetic guiding loop and permanent magnet, and the left rotor inside with right-hand rotation iron core unshakable in one's determination is interior magnetic guiding loop in a left side and right interior magnetic guiding loop, is permanent magnet between the magnetic guiding loop in the interior magnetic guiding loop in a left side 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 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 redundant each other magnetic pole of the stator respectively in 8 pairs of magnetic poles, these two groups the magnetic pole of the stator and the rotor of redundancy are formed two redundant each other inner rotor radial magnetic bearings altogether each other, 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 the interior magnetic guiding loop in a left side, left rotor iron core, left side air gap, stator core magnetic pole, right side air gap, the son of turning right interior magnetic guiding loop unshakable in one's determination and 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 is: the magnetic flux that produces with Y-axis postive direction solenoid current is an example, the electromagnetism magnetic flux through the magnetic pole of the stator of stator core+Y direction left end ,+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 inner 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, the electromagnetism main magnetic circuit is: the magnetic flux that produces with Y ' axle postive direction solenoid current is an example, the electromagnetism magnetic flux is through the magnetic pole of the stator of stator core+Y ' direction left end, 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 hybrid magnetic bearing broke down, another standby radial hybrid magnetic bearing entered normal working.
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 inner rotor radial magnetic bearing with a left side (right side) interior 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 biased internal 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 biased internal rotor radial magnetic bearing sectional drawing with redundancy structure of the present invention;
Fig. 3 is the permanent magnet biased internal rotor radial magnetic bearing left side sectional view with redundancy structure of the present invention;
Fig. 4 is the permanent magnet biased internal rotor radial magnetic bearing right side sectional view with redundancy structure of the present invention;
Fig. 5 is the permanent magnet biased internal 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 biased internal 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 biased internal 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 magnetic guiding loop 6 and permanent magnet 1 in left rotor iron core 3, right-hand rotation iron core 5, the interior magnetic guiding loop 2 in a left side, the right side, the inside of the left rotor unshakable in one's determination 3 and the sub-iron core 5 of turning right is interior magnetic guiding loops 6 of the magnetic guiding loop 2 and the right side in the left side, is permanent magnet 1 between magnetic guiding loop 2 and the right interior magnetic guiding loop 6 in the left side; 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.
Interior magnetic guiding loop 2 in a left side and right interior magnetic guiding loop 6 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 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 biased internal 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 magnetic guiding loop (6) and permanent magnet (1) in left rotor iron core (3), right-hand rotation (5) unshakable in one's determination, the interior magnetic guiding loop (2) in a left side, the right side, the inside of left rotor iron core (3) and turn right sub (5) unshakable in one's determination is interior magnetic guiding loop (2) in a left side and right interior magnetic guiding loop (6), is permanent magnet (1) between the magnetic guiding loop (6) in the magnetic guiding loop (2) and the right side in the left side; Stator core (8) left side non-conterminous 4 magnetic poles (9,11,13,15) and on coil and non-conterminous 4 magnetic poles of right side stator core (17,19,21,23) and on coil form one group of magnetic pole of the stator; Stator core (8) left side non-conterminous other 4 magnetic poles (10,12,14,16) and on coil and non-conterminous other 4 magnetic poles of right side stator core (18,20,22,24) and on coil form another group magnetic pole of the stator; Above-mentioned two groups of magnetic pole of the stator are formed redundant each other magnetic pole of the stator, and whole device is formed two redundant each other radial hybrid magnetic bearings altogether.
2, the permanent magnet biased internal 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 biased internal 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 biased internal rotor radial magnetic bearing with redundancy structure according to claim 1 is characterized in that: magnetic guiding loop in the described left side (2) and right interior magnetic guiding loop (6) all adopt the good material of magnetic property to make.
5, the permanent magnet biased internal 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 |
|---|---|---|---|
| CNB2007100632707A CN100451361C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial magnetic bearing with redundant structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632707A CN100451361C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial magnetic bearing with redundant structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1995767A CN1995767A (en) | 2007-07-11 |
| CN100451361C true CN100451361C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100632707A Expired - Fee Related CN100451361C (en) | 2007-01-05 | 2007-01-05 | PM offset inner rotor radial magnetic bearing with redundant structure |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494707C (en) * | 2007-11-07 | 2009-06-03 | 南京航空航天大学 | Three pole permanent magnet offset radial magnetic bearing |
| KR101568422B1 (en) * | 2009-05-06 | 2015-11-12 | 주식회사 포스코 | Magnetic bearing device for supporting roll shaft |
| 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 |
| CN101922510B (en) * | 2010-08-17 | 2014-04-23 | 北京航空航天大学 | A Double Permanent Magnet Inner Rotor Permanent Magnet Bias Radial Magnetic Bearing |
| CN103195806B (en) * | 2012-01-04 | 2016-02-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic suspension bearing stator, magnetic suspension bearing, stator iron core make frock and method |
| CN104565054A (en) * | 2013-10-24 | 2015-04-29 | 武汉理工大学 | Axial magnetic bearing redundant structure |
| CN104121288B (en) * | 2014-08-06 | 2017-10-24 | 赛特勒斯轴承科技（北京）有限公司 | The main passive outer rotor magnetic bearing of one kind |
| CN109268390A (en) * | 2018-11-26 | 2019-01-25 | 北京航空航天大学 | A kind of precision tracking bracket multi-coil axial magnetic bearing |
| CN109681527B (en) * | 2019-01-14 | 2020-05-19 | 南京航空航天大学 | A Radial Magnetic Bearing Control Method with Redundant Function |
| CN111022499B (en) * | 2019-12-31 | 2023-09-29 | 淮阴工学院 | Radial large bearing capacity hybrid magnetic bearing |
| CN112815008B (en) * | 2021-03-22 | 2022-02-15 | 华中科技大学 | Magnetic suspension two-degree-of-freedom radial bearing four-phase full-bridge topological circuit |
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| JP2001146917A (en) * | 1999-11-24 | 2001-05-29 | Meidensha Corp | Thrust magnetic bearing using both of electromagnet and permanent magnet |
| US6563244B1 (en) * | 1999-07-28 | 2003-05-13 | Seiko Instruments Inc. | Composite-type electromagnet and radial magnetic bearing |
| CN1648478A (en) * | 2005-01-27 | 2005-08-03 | 北京航空航天大学 | A Low Power Consumption Permanent Magnet Bias Inner Rotor Radial Magnetic Bearing |
| CN1667286A (en) * | 2005-04-06 | 2005-09-14 | 北京航空航天大学 | A Permanent Magnet Bias Inner Rotor Radial Magnetic Bearing |
| CN1707127A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | A low power consumption permanent magnet bias hybrid radial magnetic bearing |
| CN1995770A (en) * | 2007-01-05 | 2007-07-11 | 北京航空航天大学 | PM offset inner rotor radial mixed magnetic bearing with redundant structure |
-
2007
- 2007-01-05 CN CNB2007100632707A patent/CN100451361C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6563244B1 (en) * | 1999-07-28 | 2003-05-13 | Seiko Instruments Inc. | 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 |
| CN1707127A (en) * | 2004-12-30 | 2005-12-14 | 北京航空航天大学 | A low power consumption permanent magnet bias hybrid radial magnetic bearing |
| CN1648478A (en) * | 2005-01-27 | 2005-08-03 | 北京航空航天大学 | A Low Power Consumption Permanent Magnet Bias Inner Rotor Radial Magnetic Bearing |
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| CN1995770A (en) * | 2007-01-05 | 2007-07-11 | 北京航空航天大学 | PM offset inner rotor radial mixed magnetic bearing with redundant structure |
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| Publication number | Publication date |
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| CN1995767A (en) | 2007-07-11 |
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