CN1277060C - Low power consumption permanent magnet biased internal rotor radial magnetic bearing - Google Patents
Low power consumption permanent magnet biased internal rotor radial magnetic bearing Download PDFInfo
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- CN1277060C CN1277060C CN 200510011271 CN200510011271A CN1277060C CN 1277060 C CN1277060 C CN 1277060C CN 200510011271 CN200510011271 CN 200510011271 CN 200510011271 A CN200510011271 A CN 200510011271A CN 1277060 C CN1277060 C CN 1277060C
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Abstract
The present invention relates to a permanent magnet biased radial magnetic bearing of low power consumption with an internal rotor, which is composed of external magnetic conducting rings, a permanent magnet, stator cores, excitation coils, internal magnetic conducting rings and rotor cores, wherein four stator magnetic poles are formed by each stator core, and eight stator magnetic poles at the left side and the right side of the magnetic bearing are formed by two stator cores; magnetic poles in the four positive and negative directions of an X axis and a Y axis are respectively formed by the eight stator magnetic poles, and each of the excitation coils is wound around each stator magnetic pole; each external magnetic conducting ring is arranged outside each stator core, and is connected with each stator core, and the permanent magnet is arranged between the two external magnetic conducting rings; each rotor core is arranged inside each stator core, and a certain clearance is formed between the internal surface of each stator core and the external surface of each rotor core so as to form an air gap; each internal magnetic conducting ring is arranged in each rotor core, and the rotor cores at the left side and the right side are connected through the internal magnetic conducting ring so as to form a magnetic path. The present invention has the advantages of low power consumption, small size, light weight, convenient processing and manufacture, etc., and can be used for the non-contact support of the rotating part in mechanical equipment such as motors, machine tools, etc.
Description
Affiliated technical field
The present invention relates to a kind of non-contact magnetically suspension bearing, particularly a kind of low power consumption permanent magnet biased internal rotor radial magnetic bearing can be used as the contactless support of rotary component in the machinery such as motor, lathe.
Background technique
Magnetic suspension bearing divides pure electromagnetic type and permanent magnet bias to power up the hybrid magnetic suspension bearing of magnetic control system, the former uses, and electric current is big, power consumption is big, permanent magnet bias powers up the hybrid magnetic suspension bearing of magnetic control system, main bearing capacity is born in the magnetic field that permanent magnet produces, electromagnetism magnetic field provides auxiliary adjusting bearing capacity, thereby this bearing can reduce to control electric current greatly, reduces the wastage.But present permanent magnet biased internal rotor radial magnetic bearing structure, some is on the basis of common radial magnetic bearing, on electromagnetic circuit to placing permanent magnet, the magnetic flux that control coil produced will pass permanent magnet like this, because the permanent magnet magnetic resistance is very big, thereby control coil will produce the exciting curent that certain electromagnetism magnetic flux need be bigger, certain structures is that permanent magnet is directly linked to each other with stator lasmination is unshakable in one's determination in addition, permanent magnetic circuit can lose too much magnetomotive force when passing stator core like this, thereby can weaken the suction of permanent magnet to rotor shaft greatly; Owing to have above-mentioned defective, so there is the shortcoming that power consumption is big, volume is big, weight is big in existing permanent magnet biased magnetic bearing.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of low in energy consumption, volume is little, the low power consumption permanent magnet biased internal rotor radial magnetic bearing of in light weight, convenient processing and manufacture.
One of technical solution of the present invention is: low power consumption permanent magnet biased internal rotor radial magnetic bearing, it is characterized in that: by outer magnetic guiding loop, permanent magnet, stator core, field coil, interior magnetic guiding loop, rotor core is formed, 4 magnetic poles are formed in each stator core, 8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores, form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil, the stator core outside is outer magnetic guiding loop, outer magnetic guiding loop links to each other with stator core, permanent magnet is positioned in the middle of two outer magnetic guiding loops, stator core is inner to be rotor core, stator core internal surface and rotor core outer surface leave certain clearance, form air gap, and interior magnetic guiding loop is installed in rotor core inside, and the rotor core of two ends, the left and right sides coupled together, form flux path.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bear the suffered radial force of magnetic bearing, regulating action is played in the magnetic field that field coil produced, and is used for changing every power of extremely descending magnetic field, keep magnetic bearing rotor air gap even, and make rotor obtain contactless support.Permanent magnetic circuit of the present invention is: magnetic flux is from the permanent magnet N utmost point, get back to the permanent magnet S utmost point by the outer magnetic guiding loop of an end, stator core, air gap, rotor core, interior magnetic guiding loop to rotor core, air gap, stator core, the outer magnetic guiding loop of the other end, form the main magnetic circuit of magnetic suspension bearing, as shown in Figure 1.The magnetic flux that produces with certain end Y-axis postive direction field coil electric current is an example, its path is: the Y-axis postive direction magnetic pole that forms by stator core, Y-axis postive direction air gap to rotor core, then to other three direction magnetic poles of other three direction air gaps, stator core formation, get back to the Y-axis postive direction magnetic pole of stator core formation, constitute the closed-loop path, as shown in Figure 2.Guaranteed that so not only electric excitatory magnetic circuit not by permanent magnet inside, has reduced the magnetic resistance of electric excitatory magnetic circuit, reduced exciting curent, guaranteed that again the permanent magnet magnetic circuit not directly by the stator core of lamination, has reduced the magnetomotive loss of permanent magnetism simultaneously.
Two of technical solution of the present invention is: low power consumption permanent magnet biased internal rotor radial magnetic bearing, it is characterized in that: by outer magnetic guiding loop, permanent magnet, stator core, field coil, interior magnetic guiding loop, rotor core is formed, 4 magnetic poles are formed in each stator core, 8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores, form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil, the stator core outside is outer magnetic guiding loop, outer magnetic guiding loop links to each other with stator core, in stator core inside is rotor core, stator core internal surface and rotor core outer surface leave certain clearance, form air gap, interior magnetic guiding loop is installed in rotor core inside, and permanent magnet is positioned in the middle of two magnetic guiding loops, two interior magnetic guiding loops couple together the rotor core of two ends, the left and right sides, form flux path.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bear the suffered radial force of magnetic bearing, regulating action is played in the magnetic field that field coil produced, and is used for changing every power of extremely descending magnetic field, keep magnetic bearing rotor air gap even, and make rotor obtain contactless support.Permanent magnetic circuit of the present invention 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 the end, rotor core, air gap, stator core, outer magnetic guiding loop to the interior magnetic guiding loop of the stator core of the other end, air gap, rotor core, the other end, form the main magnetic circuit of magnetic suspension bearing, as shown in Figure 3.The magnetic flux that produces with certain end Y-axis postive direction field coil electric current is an example, its path is: the Y-axis postive direction magnetic pole that forms by stator core, Y-axis postive direction air gap to rotor core, then to other three direction magnetic poles of other three direction air gaps, stator core formation, get back to the Y-axis postive direction magnetic pole of stator core formation, constitute the closed-loop path, as shown in Figure 4.Guaranteed that so not only electric excitatory magnetic circuit not by permanent magnet inside, has reduced the magnetic resistance of electric excitatory magnetic circuit, reduced exciting curent, guaranteed that again the permanent magnet magnetic circuit not directly by the stator core of lamination, has reduced the magnetomotive loss of permanent magnetism simultaneously.
The present invention's advantage compared with prior art is: the present invention is owing to adopt permanent magnetic field as bias magnetic field, compare with the traditional electrical magnetic bearing and to have eliminated the bias current that in coil current, accounts for fundamental component, reduced winding copper loss and the loss of control power amplifier, so power consumption is very low.This structure is compared with the traditional electrical magnetic bearing simultaneously, and the permanent-magnett electromagnetic magnetic bearing produces the electromagnetism magnetic field of iron loss and has only big or small variation, and non-polar variation, this makes magnetic bearing have very low iron loss, this has further reduced power consumption.Compare with existing permanent magnet biased magnetic bearing, its permanent magnetic circuit of low power consumption permanent magnet biased internal rotor radial magnetic bearing of the present invention separates with the excitatory magnetic circuit of electricity, because of the excitatory magnetic circuit magnetic resistance of electricity is very low, very little exciting curent just can produce bigger magnetic flux, thereby has saved power consumption; Because this structure makes permanent magnetic circuit directly not pass the stator core of lamination, thereby can not lose the permanent magnetism magnetomotive force in stator core, so reduced the volume of permanent magnet.
Another advantage of the present invention is: in a machinery, if axial length is shorter, for adapting to the requirement of installation dimension, the field coil at described low power consumption permanent magnet biased internal rotor radial magnetic bearing two ends can be controlled separately, the present invention can be used as two bearings uses like this, to reduce axial dimension; If the axial length of equipment is longer, run stability for better assurance equipment, can use described low power consumption permanent magnet biased internal rotor radial magnetic bearing in pairs, and the distance of two bearings is widened as far as possible, at this moment the field coil at two ends, a bearing left and right sides can carry out the series and parallel connection, saves control circuit.
Description of drawings
Fig. 1 is the outer steel of one of the technology of the present invention solution, outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing axial, cross-sectional view;
Fig. 2 is the outer steel of one of the technology of the present invention solution, outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing axial end figure;
Fig. 3 is two interior magnet steel, an outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing axial, cross-sectional view of the technology of the present invention solution;
Fig. 4 is two interior magnet steel, outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing axial end figure of the technology of the present invention solution.
Embodiment
As Fig. 1, shown in 2, outer steel for one of the technology of the present invention solution, outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing, it is citation form of the present invention, it is by 2 outer magnetic guiding loops 1,1 permanent magnet 2,2 stator cores 3,8 field coils 4,1 interior magnetic guiding loop 5,2 rotor cores 6,8 air gaps 7 are formed, 4 magnetic poles are formed in each stator core 3,8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores 3, form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil 4, stator core 3 outsides are outer magnetic guiding loops 1, outer magnetic guiding loop 1 links to each other with stator core 3, outside two, be permanent magnet 2 in the middle of the magnetic guiding loop 1, the inside of stator core 3 is rotor cores 6, stator core 3 internal surfaces and rotor core 6 outer surfaces leave certain clearance, form air gap 7, and interior magnetic guiding loop 5 is installed in the inside of rotor core 6, and two ends, left and right sides rotor core 6 coupled together, form flux path.The magnetic suspension bearing of this kind form also can be divided into 2 with interior magnetic guiding loop 5, and being situated between adds a permanent magnet again, and this permanent magnet is connected with the permanent magnet 2 in the middle of the outer magnetic guiding loop 1.
As Fig. 3, shown in 4, two interior magnet steel of the technology of the present invention solution, outer field coil low power consumption permanent magnet biased internal rotor radial magnetic bearing axle, it is by outer magnetic guiding loop 1, permanent magnet 2, stator core 3, field coil 4, interior magnetic guiding loop 5, rotor core 6, air gap 7 is formed, 4 magnetic poles are formed in each stator core 3,8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores 3, form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil 4, stator core 3 outsides are outer magnetic guiding loop 1, outer magnetic guiding loop 1 links to each other with stator core 3, in stator core 3 inside are rotor cores 6, stator core 3 internal surfaces and rotor core 6 outer surfaces leave certain clearance, form air gap 7, interior magnetic guiding loop 5 is installed in rotor core 6 inside, permanent magnet 2 is positioned in the middle of two magnetic guiding loops 5, and interior magnetic guiding loop 5 couples together two ends, left and right sides rotor core 6, forms flux path.The magnetic suspension bearing of this kind form also can be divided into 2 with outer magnetic guiding loop 1, and being situated between adds a permanent magnet again, and this permanent magnet is connected with the permanent magnet 2 in the middle of the interior magnetic guiding loop 5.
Used outer magnetic guiding loop 1, the interior magnetic guiding loop 5 of each technological scheme of the invention described above all made with the good material of magnetic property, as magnetic materials such as electrical pure iron, various carbon steel, cast iron, cast steel, alloyed steel, 1J50 and 1J79 etc.Stator core 3, rotor core 6 can form with magnetic property good electric thin steel sheet such as magnetic material punching presses such as electrical pure iron, electrical steel plate DR510, DR470, DW350,1J50 and the 1J79 system of changing.The material of permanent magnet 2 is good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and permanent magnet 2 is an axial annulus, magnetizes vertically.Paint-dipping drying forms after the good electromagnetic wire coiling of field coil 4 usefulness conductions.
Claims (10)
1, low power consumption permanent magnet biased internal rotor radial magnetic bearing, it is characterized in that: by outer magnetic guiding loop (1), permanent magnet (2), stator core (3), field coil (4), interior magnetic guiding loop (5), rotor core (6) is formed, 4 magnetic poles are formed in each stator core (3), 8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores (3), form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil (4), stator core (3) outside is outer magnetic guiding loop (1), outer magnetic guiding loop (1) links to each other with stator core (3), permanent magnet (2) is positioned in the middle of two outer magnetic guiding loops (1), stator core (3) is inner to be rotor core (6), stator core (3) internal surface and rotor core (6) outer surface leave certain clearance, form air gap (7), interior magnetic guiding loop (5) is installed in rotor core (6) inside, and two ends, left and right sides rotor core (6) coupled together, form flux path.
2, low power consumption permanent magnet biased internal rotor radial magnetic bearing according to claim 1, it is characterized in that: magnetic guiding loop (5) is divided into 2 in described, being situated between adds a permanent magnet again, and this permanent magnet is connected with the permanent magnet (2) in the middle of the outer magnetic guiding loop (1).
3, low power consumption permanent magnet biased internal rotor radial magnetic bearing according to claim 1 and 2 is characterized in that: described permanent magnet (2) is an axial annulus, magnetizes vertically.
4, low power consumption permanent magnet biased internal rotor radial magnetic bearing according to claim 1 and 2 is characterized in that: described permanent magnet (2) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
5, low power consumption permanent magnet biased internal rotor radial magnetic bearing according to claim 1 and 2 is characterized in that: described outer magnetic guiding loop (1), interior magnetic guiding loop (5) all adopt the good material of magnetic property to make.
6, low power consumption permanent magnet biased internal rotor radial magnetic bearing, it is characterized in that: by outer magnetic guiding loop (1), permanent magnet (2), stator core (3), field coil (4), interior magnetic guiding loop (5), rotor core (6) is formed, 4 magnetic poles are formed in each stator core (3), 8 magnetic poles in two ends, the magnetic bearing left and right sides are formed in 2 stator cores (3), form X respectively, the magnetic pole of the positive negative direction of Y-axis, each magnetic pole of the stator is wound with field coil (4), stator core (3) outside is outer magnetic guiding loop (1), outer magnetic guiding loop (1) links to each other with stator core (3), in stator core (3) inside is rotor core (6), stator core (3) internal surface and rotor core (6) outer surface leave certain clearance, form air gap (7), interior magnetic guiding loop (5) is installed in rotor core (6) inside, permanent magnet (2) is positioned in the middle of two magnetic guiding loops (5), interior magnetic guiding loop (5) couples together two ends, left and right sides rotor core (6), forms flux path.
7, low power consumption permanent magnet biased internal rotor radial magnetic bearing according to claim 6, it is characterized in that: described outer magnetic guiding loop (1) is divided into 2, being situated between adds a permanent magnet again, and this permanent magnet is connected with the permanent magnet (2) in the middle of the interior magnetic guiding loop (5).
8, according to claim 6 or 7 described low power consumption permanent magnet biased internal rotor radial magnetic bearings, it is characterized in that: described permanent magnet (2) is an axial annulus, magnetizes vertically.
9, according to claim 6 or 7 described low power consumption permanent magnet biased internal rotor radial magnetic bearings, it is characterized in that: described permanent magnet (2) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
10, according to claim 6 or 7 described low power consumption permanent magnet biased internal rotor radial magnetic bearings, it is characterized in that: described outer magnetic guiding loop (1), interior magnetic guiding loop (5) all adopt the good material of magnetic property to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011271 CN1277060C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011271 CN1277060C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
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| Publication Number | Publication Date |
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| CN1648478A CN1648478A (en) | 2005-08-03 |
| CN1277060C true CN1277060C (en) | 2006-09-27 |
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| CN 200510011271 Expired - Fee Related CN1277060C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased internal rotor radial magnetic bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366930C (en) * | 2006-11-03 | 2008-02-06 | 北京航空航天大学 | Design method for permanent magnet bias inner rotor radial magnetic bearing |
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| CN100381720C (en) * | 2006-11-03 | 2008-04-16 | 北京航空航天大学 | Design method for permanent magnet bias inner rotor radial mixed magnetic bearing |
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| CN100458199C (en) * | 2007-07-13 | 2009-02-04 | 南京航空航天大学 | Permanent magnet biased axial magnetic suspension bearing |
| CN101886667B (en) * | 2010-07-09 | 2012-05-16 | 北京奇峰聚能科技有限公司 | Permanent-magnetic bias inner rotor radial magnetic bearing |
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| CN101922510B (en) * | 2010-08-17 | 2014-04-23 | 北京航空航天大学 | Inner rotor permanent magnet biased radial magnetic bearing with double permanent magnets |
| 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 |
| CN102072249B (en) * | 2011-01-13 | 2013-05-08 | 北京航空航天大学 | Large-bearing-capacity radial magnetic bearing |
| CN102384162B (en) * | 2011-11-11 | 2013-04-17 | 北京奇峰聚能科技有限公司 | Inner rotor radial magnetic bearing |
| DE102015102913B4 (en) * | 2015-03-02 | 2024-03-14 | Pfeiffer Vacuum Gmbh | Magnetic bearing and method for holding a body without contact |
| CN105257699B (en) * | 2015-10-16 | 2018-01-09 | 浙江工业大学 | Mix three-phase magnetic bearing |
| CN106594072B (en) * | 2016-11-29 | 2017-11-14 | 北京航空航天大学 | One kind is without thrust disc footpath axial direction integrated permanent-magnet biased magnetic bearing |
| CN108050156A (en) * | 2017-11-14 | 2018-05-18 | 江苏大学 | A kind of sextupole hybrid magnetic bearing |
| CN112671158A (en) * | 2020-11-30 | 2021-04-16 | 珠海格力电器股份有限公司 | Hybrid magnetic suspension bearing, motor and air conditioner |
-
2005
- 2005-01-27 CN CN 200510011271 patent/CN1277060C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366930C (en) * | 2006-11-03 | 2008-02-06 | 北京航空航天大学 | Design method for permanent magnet bias inner rotor radial magnetic bearing |
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| CN1648478A (en) | 2005-08-03 |
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Granted publication date: 20060927 Termination date: 20190127 |