CN1648479A - Low power consumption permanent magnet biased axial magnetic bearing - Google Patents
Low power consumption permanent magnet biased axial magnetic bearing Download PDFInfo
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- CN1648479A CN1648479A CN 200510011272 CN200510011272A CN1648479A CN 1648479 A CN1648479 A CN 1648479A CN 200510011272 CN200510011272 CN 200510011272 CN 200510011272 A CN200510011272 A CN 200510011272A CN 1648479 A CN1648479 A CN 1648479A
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Abstract
An axial magnetic bearing consists of a bearing body, an exciting coil, a permanent magnet, a magnetizer ring and an exciting gap. The permanent magnet contacting closely to the bearing body produces magnetic fields in different polarities separately in the inner and outer gaps; the exciting coil wound onto the bearing body generates the exciting magnetic flux; and the magnetizer ring contacting closely to the permanent magnet forms exciting gap between the magnetizer ring and the bearing body for providing the magnetic flux the exciting coil generates with magnetic path. The axial magnetic bearings of the present invention are used in pair in machine and the corresponding parts are made of magnetic permeable material. The present invention has the advantages of low magnetic reluctance, low exciting cut, low power consumption, small size, light weight, easy manufacture, etc. and may be used as the no-contact support for rotating part in machine.
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 axial magnetic bearing can be used as the contactless support of rotary component in the machinery such as motor, lathe.
Background technique
The key that the permanent-magnett electromagnetic magnetic bearing has low power consumption is to guarantee that the magnetic flux that field coil produces does not pass through permanent magnet, but existing permanent-magnetic biased axial magnetic bearing structure, some be at plain shaft on the basis of electromagnetic bearing, on electromagnetic circuit, place permanent magnet, the magnetic flux that control coil is produced will pass permanent magnet, because the permanent magnet magnetic resistance is very big, control coil will produce certain electromagnetism magnetic flux needs bigger exciting curent, though the electric excitatory magnetic circuit of certain structures does not pass permanent magnet in addition, but vertically pass the rotor pack iron core, this just needs very big electric excitatory magnetic potential could satisfy the requirement of controlling, so existing permanent-magnetic biased axial magnetic bearing exists power consumption big, volume is big, the shortcoming that weight is big.
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 axial 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 axial magnetic bearing, it is characterized in that: form by bearing support, field coil, permanent magnet, magnetic guiding loop, excitatory air gap, permanent magnet is close on the bearing support, and on interior air gap of magnetic bearing (near axle head) and outer air gap (non-) near axle head the magnetic field of generation opposed polarity, field coil is wound on the bearing support, produce magnetizing flux, magnetic guiding loop is close on the permanent magnet and forms excitatory air gap between magnetic guiding loop and bearing support, and this excitatory air gap provides magnetic circuit to the magnetic flux that field coil produces.Above-mentioned permanent-magnetic biased axial magnetic bearing is symmetry use in pairs in a machinery, and rotating machinery and two pairing parts of magnetic bearing should be that permeability magnetic material is made.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bear the suffered axial force of magnetic bearing, regulating action is played in the magnetic field that field coil produced, be used for changing the power of rotor shaft both sides air-gap field, keep the formed air gap of rotating part of magnetic bearing and machinery even, and make the rotating part of machinery obtain contactless support.
Two of technical solution of the present invention is: low power consumption permanent magnet biased axial magnetic bearing, it is characterized in that: form by bearing support, field coil, permanent magnet, magnetic guiding loop, excitatory air gap, permanent magnet is close on the bearing support, and in the magnetic field of interior air gap of magnetic bearing (near axle head) and outer air gap (non-close axle head) generation opposed polarity.Field coil is wound on the bearing support, produces magnetizing flux, and magnetic guiding loop is close on the permanent magnet and forms excitatory air gap between magnetic guiding loop and bearing support, and this excitatory air gap provides magnetic circuit to the magnetic flux that field coil produces.Scheme two is compared with scheme one, and permanent magnet moves to the field coil outside.Above-mentioned permanent-magnetic biased axial magnetic bearing is symmetry use in pairs in a machinery, and rotating machinery and two pairing parts of magnetic bearing should be that permeability magnetic material is made.
The principle of such scheme is: permanent magnet provides permanent magnet bias magnetic field to magnetic bearing, bear the suffered axial force of magnetic bearing, regulating action is played in the magnetic field that field coil produced, be used for changing the power of rotor shaft both sides air-gap field, keep magnetic bearing and the formed air gap of machinery even, and make the rotating part of machinery obtain contactless support.
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 biasing exciting curent 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 electromagnetism magnetic field that the present invention is produced on supported mechanical has only the variation of size, and non-polar variation, thereby use the present invention to have very low iron loss.Compare with existing permanent magnet biased magnetic bearing, low power consumption permanent magnet biased axial magnetic bearing of the present invention, its permanent magnetic circuit separates with the excitatory magnetic circuit of electricity, because of the excitatory magnetic circuit magnetic resistance of electricity very low, very little exciting curent just can produce bigger magnetic flux, thereby has saved power consumption.
Description of drawings
Fig. 1 is interior magnet steel of the present invention, outer field coil low power consumption permanent magnet biased axial magnetic bearing axial, cross-sectional view;
Fig. 2 is interior magnet steel of the present invention, outer field coil low power consumption permanent magnet biased axial magnetic bearing axial end figure (along excitatory air gap sectional drawing);
Fig. 3 is outer steel of the present invention, interior field coil low power consumption permanent magnet biased axial magnetic bearing axial, cross-sectional view;
Fig. 4 is outer steel of the present invention, interior field coil low power consumption permanent magnet biased axial magnetic bearing axial end figure (along excitatory air gap sectional drawing).
Embodiment
As shown in Figure 1, 2, be magnet steel, outer field coil low power consumption permanent magnet biased axial magnetic bearing in of the present invention, citation form promptly of the present invention, it is made up of bearing support 1, field coil 2, permanent magnet 3, magnetic guiding loop 4, excitatory air gap 5.Permanent magnet 3 is close on the bearing support 1, and the magnetic field that on the inside and outside air gap of magnetic bearing, produces opposed polarity, field coil 2 is wound on the bearing support 1, produce magnetizing flux, magnetic guiding loop 4 is close on the permanent magnet 3, and between magnetic guiding loop 4 and bearing support 1, forming excitatory air gap 5, this excitatory air gap provides magnetic circuit to the magnetic flux that field coil produces.
As shown in Figure 1, 2, if the permanent magnet N utmost point is towards magnetic guiding loop 4, permanent magnetic circuit then of the present invention is: magnetic flux is from the permanent magnet N utmost point, by magnetic guiding loop 4, interior air gap, supported rotating part, through outer air gap, bearing support 1, get back to the permanent magnet S utmost point, form the main magnetic circuit of magnetic suspension bearing, shown in Fig. 1 solid line; If the magnetic field that the left end field coil produces is identical with the magnetic field that permanent magnet produces, then the magnetic flux path that produces of field coil 2 is: by bearing support 1, excitatory air gap 5, magnetic guiding loop 4, through interior air gap, supported rotating part, outer air gap, get back to bearing support 1, constitute the closed-loop path, shown in Fig. 1 dotted line.Guaranteed that so most of electric magnetizing flux not by permanent magnet inside, has reduced the magnetic resistance of electric excitatory magnetic circuit, reduced exciting curent.
As Fig. 3, shown in 4, be another kind of structural type of the present invention, it is outer steel, interior field coil low power consumption permanent magnet biased axial magnetic bearing, permanent magnet 3 moves to field coil 2 outsides, by bearing support 1, field coil 2, permanent magnet 3, magnetic guiding loop 4, excitatory air gap 5 is formed, permanent magnet 3 is close on the bearing support 1, and the magnetic field that on the inside and outside air gap of magnetic bearing, produces opposed polarity, field coil 2 is wound on the bearing support 1, produce magnetizing flux, magnetic guiding loop 4 is close on the magnet steel, and forms excitatory air gap 5 between magnetic guiding loop 4 and bearing support 1, and this excitatory air gap 5 provides magnetic circuit to the magnetic flux that field coil produces.
Shown in Fig. 3,4, if the permanent magnet N utmost point is towards magnetic guiding loop 4, permanent magnetic circuit of the present invention is: magnetic flux is from the permanent magnet N utmost point, by magnetic guiding loop 4, interior air gap, supported rotating part, through outer air gap, bearing support 1, get back to the permanent magnet S utmost point, shown in Fig. 3 solid line, form the main magnetic circuit of magnetic suspension bearing; If the magnetic field that the left end field coil produces is identical with the magnetic field that permanent magnet produces, then the magnetic flux path that produces of field coil 2 is: by bearing support 1, excitatory air gap 5, magnetic guiding loop 4, through interior air gap, supported rotating part, outer air gap, get back to bearing support 1, shown in Fig. 4 dotted line, constitute the closed-loop path, guaranteed that so the excitatory magnetic circuit of most of electricity not by permanent magnet inside, has reduced the magnetic resistance of electric excitatory magnetic circuit, reduced exciting curent.
Permanent-magnetic biased axial magnetic bearing in above-mentioned two schemes is symmetry use in pairs in a machinery, as Fig. 1, shown in Figure 3.Bearing support 1, magnetic guiding loop 4 and rotating machinery and two pairing parts of magnetic bearing are all used the good material of magnetic property and are made, as various carbon steels, various alloyed steel, electrical pure iron, cast iron, cast steel etc.Permanent magnet 3 is an axial annulus, magnetizes vertically, adopts good rare-earth permanent magnet or the ferrite permanent magnet of magnetic property, and paint-dipping drying formed after field coil 2 adopted the good electromagnetic wire coiling of conduction.
Claims (8)
1, low power consumption permanent magnet biased axial magnetic bearing, it is characterized in that: it is by bearing support (1), field coil (2), permanent magnet (3), magnetic guiding loop (4), excitatory air gap (5) is formed, permanent magnet (3) is in the inside of field coil (2), and be close on the bearing support (1), and the magnetic field that on the inside and outside air gap of magnetic bearing, produces opposed polarity, field coil (2) is wound on the bearing support (1), produce magnetizing flux, magnetic guiding loop (4) is close on the permanent magnet (3), and between magnetic guiding loop (4) and bearing support (1), forming excitatory air gap (5), the magnetic flux that this excitatory air gap (5) produces for field coil (2) provides magnetic circuit.
2, low power consumption permanent magnet biased axial magnetic bearing according to claim 1 is characterized in that: described permanent magnet (3) is an axial annulus, magnetizes vertically.
3, low power consumption permanent magnet biased axial magnetic bearing according to claim 1 is characterized in that: described permanent magnet (3) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
4, low power consumption permanent magnet biased axial magnetic bearing according to claim 1 is characterized in that: described bearing support (1), magnetic guiding loop (4) are all made with the good material of magnetic property.
5, low power consumption permanent magnet biased axial magnetic bearing, it is characterized in that: by bearing support (1), field coil (2), permanent magnet (3), magnetic guiding loop (4), excitatory air gap (5) is formed, permanent magnet (3) is in the outside of field coil (2), and be close on the bearing support (1), and in the magnetic field of the interior air gap of magnetic bearing and outer air gap generation opposed polarity, field coil (2) is wound on the bearing support (1), produce magnetizing flux, magnetic guiding loop (4) is close on the permanent magnet (3) and forms excitatory air gap (5) between magnetic guiding loop (4) and bearing support (1), and the magnetic flux that this excitatory air gap (5) produces for field coil (2) provides magnetic circuit.
6, low power consumption permanent magnet biased axial magnetic bearing according to claim 5 is characterized in that: described permanent magnet (3) is an axial annulus, magnetizes vertically.
7, low power consumption permanent magnet biased axial magnetic bearing according to claim 5 is characterized in that: described permanent magnet (3) adopts rare earth permanent-magnetic material or ferrite permanent-magnet materials to make.
8, low power consumption permanent magnet biased axial magnetic bearing according to claim 5 is characterized in that: described bearing support (1), magnetic guiding loop (4) are all made with the good material of magnetic property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011272 CN1270108C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased axial magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011272 CN1270108C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased axial magnetic bearing |
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| Publication Number | Publication Date |
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| CN1648479A true CN1648479A (en) | 2005-08-03 |
| CN1270108C CN1270108C (en) | 2006-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510011272 Expired - Fee Related CN1270108C (en) | 2005-01-27 | 2005-01-27 | Low power consumption permanent magnet biased axial magnetic bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406760C (en) * | 2006-11-03 | 2008-07-30 | 北京航空航天大学 | Design method for permanent magnet bias axial magnetic bearing |
| CN100458199C (en) * | 2007-07-13 | 2009-02-04 | 南京航空航天大学 | Permanent magnet biased axial magnetic suspension bearing |
| CN108374800A (en) * | 2017-02-01 | 2018-08-07 | 株式会社岛津制作所 | Magnetic bearing control device and vacuum pump |
| CN113131706A (en) * | 2021-04-27 | 2021-07-16 | 山东大学 | Disc type permanent magnet synchronous motor, energy storage flywheel and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434586B (en) * | 2011-09-20 | 2013-01-30 | 中国船舶重工集团公司第七0七研究所 | Gas-magnetic hybrid bearing for gyro motor use |
-
2005
- 2005-01-27 CN CN 200510011272 patent/CN1270108C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406760C (en) * | 2006-11-03 | 2008-07-30 | 北京航空航天大学 | Design method for permanent magnet bias axial magnetic bearing |
| CN100458199C (en) * | 2007-07-13 | 2009-02-04 | 南京航空航天大学 | Permanent magnet biased axial magnetic suspension bearing |
| CN108374800A (en) * | 2017-02-01 | 2018-08-07 | 株式会社岛津制作所 | Magnetic bearing control device and vacuum pump |
| CN108374800B (en) * | 2017-02-01 | 2020-06-16 | 株式会社岛津制作所 | Magnetic bearing control device and vacuum pump |
| CN113131706A (en) * | 2021-04-27 | 2021-07-16 | 山东大学 | Disc type permanent magnet synchronous motor, energy storage flywheel and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1270108C (en) | 2006-08-16 |
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Granted publication date: 20060816 Termination date: 20190127 |